Youth obesity has increased dramatically in the United States, disproportionally affecting Hawaiian populations. The primary research objective was to describe the influence of parent and friends on the dietary, physi...Youth obesity has increased dramatically in the United States, disproportionally affecting Hawaiian populations. The primary research objective was to describe the influence of parent and friends on the dietary, physical activity, and sedentary behaviors of Pacific Islander high school students. Data were collected from classrooms within a private high school on the Hawaiian island Oahu. Participants were Pacific Islander adolescents attending a high school in Hawaii. Participating adolescents completed a questionnaire, followed by a corresponding focus group;specifically reporting the social-level influences on their dietary and activity behaviors. Adolescents then interviewed their parent/guardian, asking questions relative to their perceived health-related influence. Participating adolescents (N = 60) were 53% female with a mean age of 16.93 (SD = 0.63), and their parents/guardians (N = 47) were 75% female with a mean age of 46.72 (SD = 5.11). Outcomes revealed parents/ guardians as the dominant influence on adolescents’ dietary behaviors, and time spent with parents was almost exclusively sedentary. In comparison, adolescents were more active with friends, but shared less healthy dietary habits. Results provide groundwork for similar examinations and culturally tailored interventions among similar adolescent populations.展开更多
Changdao Island,a hidden gem in east China’s Shandong Province,features breathtaking nature.As the sun cuddles the horizon,the island’s azure sky provides a flawless backdrop to an exquisite panorama.Jagged cliffs c...Changdao Island,a hidden gem in east China’s Shandong Province,features breathtaking nature.As the sun cuddles the horizon,the island’s azure sky provides a flawless backdrop to an exquisite panorama.Jagged cliffs carved by centuries of endless waves stand guard along the shoreline,their rocky silhouettes seemingly frozen in time,summoning ancient majesty.Against this dramatic backdrop,flocks of seagulls take flight,their ivory wings catching the golden hues of the sun,creating an enchanting ballet in the sky.The air is filled with the gentle cries of these graceful birds,enhancing the island’s serenity.This harmonious blend of nature’s elements,from the sapphire sea to the towering cliffs and the mesmerizing flight of seagulls,makes Changdao Island an artistic masterpiece painted by the hand of mother nature herself.展开更多
Aim:To describe demographic,clinical,and outcome differences in Pacific Island-born(PI-born)compared to US-born hepatocellular carcinoma(HCC)patients of Pacific Island ancestry within a clinical cohort in Hawaii.Metho...Aim:To describe demographic,clinical,and outcome differences in Pacific Island-born(PI-born)compared to US-born hepatocellular carcinoma(HCC)patients of Pacific Island ancestry within a clinical cohort in Hawaii.Methods:A prospectively collected database of 1608 patients diagnosed with HCC over a 30-year period(1993-2022)identified 252 patients of Pacific Islander ethnicity.Data collected:demographics,medical history,laboratory data,tumor characteristics,treatment,and survival.Patients were divided into two groups:PI-born and US-born.Categorical variables were analyzed using ANOVA and chi-square analysis.Odds ratios with 95%confidence intervals were calculated using univariate and multivariate logistic regression.Overall survival was evaluated using Kaplan-Meier analysis.Results:PI-born patients were younger(57.3 vs.61.8 years,P=0.002)and more likely to have hepatitis B(OR 14.10,7.50-26.50)and underlying cirrhosis(OR 2.28,1.17-4.45).In comparison,US-born patients had a significantly higher likelihood of Hepatitis C,nonalcoholic steatohepatitis/nonalcoholic fatty liver disease,history of non-HCC cancer,and positive smoking history compared to PI-born patients.PI-born patients were more likely to forego treatment(OR 3.22,1.77-5.87)and be lost to follow-up(OR 9.21,1.97-43.03).Both groups were equally likely to have the opportunity for curative surgical treatment(liver resection or transplant).US-born status was associated with higher mortality risk,while transplantation was associated with lower mortality risk.The PI-born cohort demonstrated higher overall survival at 3 and 5 years compared to US-born.Conclusion:HBV remains the primary risk factor for HCC in PI-born patients,whereas HCC in US-born patients is more associated with the adoption of a Westernized lifestyle.展开更多
The sedimentary geochemistry of St.Martin’s Island is important to determine the origin of the source rock,paleo weathering,tectonic setting,sediment recycling,maturity,sorting,redox condition,and paleo salinity of t...The sedimentary geochemistry of St.Martin’s Island is important to determine the origin of the source rock,paleo weathering,tectonic setting,sediment recycling,maturity,sorting,redox condition,and paleo salinity of the sediments.Major oxides,trace elements,and rare earth elements(REEs)obtained from the INAA technique are presented by analyzing the sediment samples collected from the shoreline of St.Martin’s Island,Bangladesh.The elemental ratios,comparison with average upper continental crust(UCC),binary diagrams(Th/Sc vs.Sc,La/Th vs.Hf,Th/Co vs.La/Sc),and chondrite normalized REE patterns exhibit substantial LREE enrichment,relatively fl at HREE fractionation,considerable negative Eu anomalies(average:0.72),indicates the derivation from a source dominated by felsic rock,with contribution from intermediate source and mafi c component.Sediments from St.Martin’s Island exhibit the deposition of sediments in transitional environments of active and passive continental margin settings.Weathering indices value of CIA,PIA,CIW,CIX,and K 2 O/Rb ratio show moderate chemical weathering,indicating that the sediments are chemically mature.Sedimentary redox indicative proxies,such as U/Th,V/Cr,and V/Sc,show an oxic depositional environment during sediment deposition.The intermediate CIA and other weathering index values of the St.Martin’s sediments show that the area had semiarid and humid climatic conditions throughout the deposition.The Rb/K ratio of the St.Martin’s sediments suggests that the development and deposition of the sedimentary sequence of St.Martin’s Island mainly occurred in a brackish water environment during the geological past.展开更多
Long March 12 Makes Debut Flight from New Commercial Spaceport China successfully launched a new carrier rocket into space from the Hainan commercial spacecraft launch site in the southern island province of Hainan on...Long March 12 Makes Debut Flight from New Commercial Spaceport China successfully launched a new carrier rocket into space from the Hainan commercial spacecraft launch site in the southern island province of Hainan on November 30,2024.The Long March-12 carrier rocket sent two experimental satellites into their planned orbits.The launch mission was a complete success,according to Hainan provincial authorities.The mission was the maiden flight of the Long March-12 carrier rocket,and the first launch mission undertaken by the Hainan commercial spacecraft launch site.展开更多
Managing invasive species requires identifying the factors that determine alien species invasion success.This study investigates how anthropogenic and biogeographical factors influence alien plant invasion in the Sany...Managing invasive species requires identifying the factors that determine alien species invasion success.This study investigates how anthropogenic and biogeographical factors influence alien plant invasion in the Sanyang Wetlands,a human-dominated island system in Wenzhou City,China.Specifically,we analyzed whether human activities(e.g.,habitat heterogeneity,proportion of road area,and cultivation)and island characteristics(e.g.,island area,isolation)affect the diversity of native and invasive plant species similarly.We also assessed the applicability of the equilibrium theory of island biogeography to invasive plant species diversity and examined how these factors affect invasive plant species with different dispersal syndromes(anemochore,zoochore,and autochore).We found that both invasive and native species richness positively correlate with island area,habitat heterogeneity,and proportion of road area.However,although native species richness was negatively correlated with isolation,invasive species richness was not.The diversity and composition of invasive species with different dispersal syndromes were determined by different variables;for example,the composition and diversity of zoochores was increased by habitat heterogeneity,while anemochore species richness was increased by the proportion of road area,whereas anemochore species composition was influenced by distance to the nearest island.We conclude that habitat fragmentation differentially affects invasive and native plant diversity,aligning with the predictions of the equilibrium theory of island biogeography only for native species but not for invasive species.Our findings indicate that tailoring habitat attributes and regulating human activities could be effective strategies for mitigating the spread of invasive species in fragmented landscapes.展开更多
By measuring scanning tunneling spectroscopy on some large Bi islands deposited on FeTe_(0.55)Se_(0.45)superconductors,we observe clear in-gap edge states with double peaks at about±1.0 me V on the spectra measur...By measuring scanning tunneling spectroscopy on some large Bi islands deposited on FeTe_(0.55)Se_(0.45)superconductors,we observe clear in-gap edge states with double peaks at about±1.0 me V on the spectra measured near the perimeter of the islands.This feature is very different from the single zero-energy peak observed on some other small Bi islands.The edge states spread towards the inner side of the islands over a width of 2-3 nm.The two edge-state peaks at positive and negative energies move to higher values with the increase of the magnetic field,and they disappear near the transition temperature of FeTe_(0.55)Se_(0.45).Meanwhile,enhanced superconducting gaps are observed in the central regions of these Bi islands,which may be induced by the enhanced pair potential of the topological surface state.Our observations provide a valuable message for the edge state and the proximity-induced superconductivity on specific Bi islands grown on FeTe_(0.55)Se_(0.45)substrate.展开更多
Weizhou Island,located in Beihai,Guangxi Province,is recognized as the largest paleovolcanic island in China,characterized by its relatively young geological age.The development of island tourism has progressively est...Weizhou Island,located in Beihai,Guangxi Province,is recognized as the largest paleovolcanic island in China,characterized by its relatively young geological age.The development of island tourism has progressively established it as a significant tourist attraction within Beihai,transforming the area into a prominent leisure and tourism resort.As tourism on Weizhou Island continues to develop both in scope and in depth,it has increasingly influenced the sense of gain among the local community residents.Currently,in alignment with the strategic objective of achieving common prosperity,it is crucial to comprehend and enhance the sense of gain experienced by residents in island tourism destinations,as this is vital for the achievement of this overarching goal.Taking the residents of Weizhou Island in Beihai as the subjects,this paper constructs their sense of gain related to tourism,employing grounded theory.It posits that the residents’sense of gain comprises four primary dimensions:sense of economic gain,sense of social gain,sense of cultural gain,and sense of environmental gain.Additionally,the paper examines the factors that influence these dimensions.Based on this foundation,effective strategies are proposed to enhance the sense of gain among community residents in island tourism destinations,thereby promoting the sustainable development of island tourism.展开更多
Islands are valuable land resources in the ocean,and their detailed subsurface seismic velocity structures are highly important for underground space utilization,engineering construction,and geological disaster preven...Islands are valuable land resources in the ocean,and their detailed subsurface seismic velocity structures are highly important for underground space utilization,engineering construction,and geological disaster prevention.Ambient noise tomography and the horizontal–vertical spectral ratio(HVSR)method use ambient noise recordings instead of earthquake signals to study the underground velocity structure,making them easy to implement on islands and consequently becoming potential optimization schemes for the investigation of detailed island structures.However,the application of these technologies to small granite islands along coasts is relatively insufficient,and the applicability needs to be further verified.This study ambient noise tomography and HVSR analysis were carried out by using a dense array of seismic data on Wuzhizhou Island,Hainan.It was found that natural activities mainly cause the ambient noise below 8 Hz on Wuzhizhou Island.Moreover,high-quality noise cross-correlation functions of 3–8 Hz can be extracted.The results of ambient noise tomography and HVSR analysis show that the underground S-wave velocity structure and sedimentary characteristics of Wuzhizhou Island are coupled with its topography.The high-terrain area of Wuzhizhou Island exhibits low-velocity anomalies,where a sedimentary layer did not develop.On the other hand,the low-terrain area of Wuzhizhou Island exhibits high-velocity anomalies,where a thin Quaternary sedimentary layer developed.These results imply that subsurface magmatic activity controls the island topography and affects the distribution of the island sedimentary layer.This study successfully verifies the feasibility of detection methods based on ambient noise in small granite islands along the coast.It also provides key basic information for studying the geological evolutionary history,island spatial planning,and geological disaster prevention of Wuzhizhou Island.展开更多
The complex relationship between humans and nature plays a key role in shaping geographic landscapes.This study examines how tourism transforms island landscapes into marketable commodities,focusing on Guanglu Island ...The complex relationship between humans and nature plays a key role in shaping geographic landscapes.This study examines how tourism transforms island landscapes into marketable commodities,focusing on Guanglu Island in China from 2002–2025 through the lens of Actor-Network Theory(ANT).The findings reveal three main insights:1)commodification involves reimagining natural landscapes,digitizing them for broader appeal,and integrating them into tourist consumption.2)This process reshapes original landscapes into four interconnected forms:material landscapes,fluid landscapes,virtual landscapes,and psychological landscapes.3)Multiple actors drive commodification:the island’s natural conditions provide foundation and influence concrete ways of commodification,local government is deeply involved through planning and regulating tourism development,tourism practitioners adapt services to market demands,and tourist preferences guide the direction of commercialization.By analyzing the roles of both human and non-human actors,this research highlights how tourism redefines island landscapes while emphasizing the active influence of nature itself in these transformations.The findings reveal the geographical attributes of landscape commodification process and the multidimensionality and complexity of its impacts,thereby providing valuable insights for the sustainable development of island tourism.展开更多
Habitat fragmentation dramatically reshapes species richness and community composition.However,most estimates ofβ-diversity rely on incidence-based metrics,which consider only species presence/absence.Here,we introdu...Habitat fragmentation dramatically reshapes species richness and community composition.However,most estimates ofβ-diversity rely on incidence-based metrics,which consider only species presence/absence.Here,we introduce a novel framework that explicitly incorporates species abundance and intraspecifictrait variation(ITV)into the quantificationof taxonomic,functional,and phylogeneticβ-diversity,allowing a more nuanced understanding of community differentiation.To demonstrate the utility of this framework,we quantifiedthe effects of island area and isolation onβ-diversity across plant communities in China's Thousand Island Lake.Abundance-weighted taxonomic multiple-site/pairwiseβ-diversity showed substantially higher nestedness and stronger nestedness-area relationship than incidence-based metrics,indicating that species-poor communities are not only subsets of richer ones but share similar abundance hierarchies,highlighting strong environmental filteringand hierarchical species sorting.We also found that the turnover component was less sensitive to isolation,suggesting limited dispersal effects.Incidence-based functional and phylogenetic distances increased with differences in island area,but these associations weakened or disappeared in abundance-weighted measures,suggesting stronger environmental filteringand functional/phylogenetic clustering among larger islands.Only abundance-weighted standardized effect sizes increased with island area differences.Additionally,ITV further amplifiedfunctional nestedness and buffered the influenceof isolation on turnover,emphasizing its role in mitigating dispersal limitations.By jointly considering abundance and ITV,two often-overlooked but critical dimensions,this study advances our understanding of how fragmentation shapesβ-diversity.These findingshighlight the importance of integrating abundanceweighted and trait-based metrics into conservation strategies to better detect functionally important species,prioritize larger habitat patches,and design biodiversity monitoring that captures withinspecies variation.展开更多
Activity 1 Think about the following questions and write down your answers before reading the text.1.What are some possible ways animals can survive without access to fresh water sources?2.What other factors besides w...Activity 1 Think about the following questions and write down your answers before reading the text.1.What are some possible ways animals can survive without access to fresh water sources?2.What other factors besides water could contribute to the thriving(茁壮成长)of a herd of goats on an isolated island?展开更多
1 On December 26,2024,a remarkable act of heroism took place at Poospatuck Creek.Kayla Masotto,a 28⁃year⁃old resident of Mastic,Long Island,stepped into the role of a life⁃saver when she witnessed a man fall through t...1 On December 26,2024,a remarkable act of heroism took place at Poospatuck Creek.Kayla Masotto,a 28⁃year⁃old resident of Mastic,Long Island,stepped into the role of a life⁃saver when she witnessed a man fall through the ice on the lake.2 At about 6 pm,Kayla was washing vegetables in the kitchen when her attention was suddenly caught by a boy skating alone on the lake.In a split second,she witnessed the ice beneath him break,and the boy fell into the water.Without any hesitation,Kayla immediately grabbed her paddleboard(桨叶式冲浪板)and ran across her backyard,reaching the edge of the lake in seconds.展开更多
Background:Undernutrition poses a major threat for the growth and development of children in remote island regions of Bangladesh.Methods:This study investigated the prevalence and risk predictors of undernutrition amo...Background:Undernutrition poses a major threat for the growth and development of children in remote island regions of Bangladesh.Methods:This study investigated the prevalence and risk predictors of undernutrition among children under five in the island regions of Bangladesh.A cross‐sectional study was conducted in 13 unions across two islands,with a random sample of 549 children.Results:Descriptive analyses showed that underweight(Z‐score<−2),wasting(Z‐score<−2),and stunting(Z‐score<−2)were prevalent,with rates of 36.80%,24.60%,and 47.20%,respectively.Significant predictors of underweight included a history of diarrhea(AOR=2.24,p<0.001),acute respiratory infection(ARI)(AOR=1.84,p<0.01),anemic caregivers(AOR=1.52,p<0.05),and belonging to day labor families(AOR=0.29,p<0.01).Childhood wasting was significantly associated with partial vaccination(AOR=2.84,p<0.001),large family size(AOR=1.79,p<0.05),higher birth order(AOR=0.58,p<0.05),diarrhea(AOR=3.09,p<0.001),anemic mothers(AOR=1.89,p<0.05),primary(AOR=3.35,p<0.05)and secondary(AOR=4.11,p<0.01)maternal education,and fathers working abroad(AOR=0.42,p<0.05)or as daily laborers(AOR=0.17,p<0.001).Stunting was more common among children with partial vaccination,diarrhea,and ARI,and less common among those with a history of fever or those from day laborer families.Conclusion:Overall,undernutrition among children in the island areas of Bangladesh is influenced by multiple factors,necessitating a multisectoral approach to improve their nutritional status.展开更多
Hainan Island is one of the largest islands in China and is located in the Indo-Burma biodiversity hotspot region.Despite its ecological significance,comprehensive population genetic studies of key marine organisms al...Hainan Island is one of the largest islands in China and is located in the Indo-Burma biodiversity hotspot region.Despite its ecological significance,comprehensive population genetic studies of key marine organisms along the entire coastline of Hainan Island have not been reported.This study examined the genetic diversity and population structure of the widely distributed oyster Saccostrea malabonensis around Hainan Island with analyzing mitochondrial COI gene sequences.The impacts of geographical,environmental and anthropogenic factors on genetic differentiation were also investigated.The results revealed a significant AT bias in the COI gene sequences,with transitions as the main mutation type.A total of 103 variable sites and 107 haplotypes were identified from480 COI sequences,with haplotype diversities from 0.067 to 0.782,and nucleotide diversities between 0.00011 and 0.00278.AMOVA analysis indicated that 86.65%of the variation occurred within one population while 13.35%among different populations.The average genetic distance across 16 populations was 0.00169,and the average genetic differentiation index was 0.13353.Distinct population patterns can be observed.The populations of Tonghai Village(THV)and Gangmen Mountain(GMM)in Lingshui showed similar genetic structures while those of Wanquan River Estuary(WQRE,Qionghai)and Wuzhizhou Island(WZZI,Sanya)displayed divergent evolutionary trends.Cluster analysis grouped the 480 individuals of S.malabonensis into six subpopulations.These findings are helpful for developing conservation strategies and genetic breeding programs,and are also helpful for understanding the evolutionary history of this oyster species in Hainan Island.展开更多
In Michigan,the US“car capital of the world”where major automakers first started,there's a special island called Mackinac Island.This small island,only 9.8 square kilometers in size,has a strict rule:no cars are...In Michigan,the US“car capital of the world”where major automakers first started,there's a special island called Mackinac Island.This small island,only 9.8 square kilometers in size,has a strict rule:no cars are allowed here—not even golf carts.Around 600 people live on the island all year round,and horses are the real“kings”that keep daily life running.展开更多
文摘Youth obesity has increased dramatically in the United States, disproportionally affecting Hawaiian populations. The primary research objective was to describe the influence of parent and friends on the dietary, physical activity, and sedentary behaviors of Pacific Islander high school students. Data were collected from classrooms within a private high school on the Hawaiian island Oahu. Participants were Pacific Islander adolescents attending a high school in Hawaii. Participating adolescents completed a questionnaire, followed by a corresponding focus group;specifically reporting the social-level influences on their dietary and activity behaviors. Adolescents then interviewed their parent/guardian, asking questions relative to their perceived health-related influence. Participating adolescents (N = 60) were 53% female with a mean age of 16.93 (SD = 0.63), and their parents/guardians (N = 47) were 75% female with a mean age of 46.72 (SD = 5.11). Outcomes revealed parents/ guardians as the dominant influence on adolescents’ dietary behaviors, and time spent with parents was almost exclusively sedentary. In comparison, adolescents were more active with friends, but shared less healthy dietary habits. Results provide groundwork for similar examinations and culturally tailored interventions among similar adolescent populations.
文摘Changdao Island,a hidden gem in east China’s Shandong Province,features breathtaking nature.As the sun cuddles the horizon,the island’s azure sky provides a flawless backdrop to an exquisite panorama.Jagged cliffs carved by centuries of endless waves stand guard along the shoreline,their rocky silhouettes seemingly frozen in time,summoning ancient majesty.Against this dramatic backdrop,flocks of seagulls take flight,their ivory wings catching the golden hues of the sun,creating an enchanting ballet in the sky.The air is filled with the gentle cries of these graceful birds,enhancing the island’s serenity.This harmonious blend of nature’s elements,from the sapphire sea to the towering cliffs and the mesmerizing flight of seagulls,makes Changdao Island an artistic masterpiece painted by the hand of mother nature herself.
基金supported by National Institutes of Health(1U01CA230690-01).
文摘Aim:To describe demographic,clinical,and outcome differences in Pacific Island-born(PI-born)compared to US-born hepatocellular carcinoma(HCC)patients of Pacific Island ancestry within a clinical cohort in Hawaii.Methods:A prospectively collected database of 1608 patients diagnosed with HCC over a 30-year period(1993-2022)identified 252 patients of Pacific Islander ethnicity.Data collected:demographics,medical history,laboratory data,tumor characteristics,treatment,and survival.Patients were divided into two groups:PI-born and US-born.Categorical variables were analyzed using ANOVA and chi-square analysis.Odds ratios with 95%confidence intervals were calculated using univariate and multivariate logistic regression.Overall survival was evaluated using Kaplan-Meier analysis.Results:PI-born patients were younger(57.3 vs.61.8 years,P=0.002)and more likely to have hepatitis B(OR 14.10,7.50-26.50)and underlying cirrhosis(OR 2.28,1.17-4.45).In comparison,US-born patients had a significantly higher likelihood of Hepatitis C,nonalcoholic steatohepatitis/nonalcoholic fatty liver disease,history of non-HCC cancer,and positive smoking history compared to PI-born patients.PI-born patients were more likely to forego treatment(OR 3.22,1.77-5.87)and be lost to follow-up(OR 9.21,1.97-43.03).Both groups were equally likely to have the opportunity for curative surgical treatment(liver resection or transplant).US-born status was associated with higher mortality risk,while transplantation was associated with lower mortality risk.The PI-born cohort demonstrated higher overall survival at 3 and 5 years compared to US-born.Conclusion:HBV remains the primary risk factor for HCC in PI-born patients,whereas HCC in US-born patients is more associated with the adoption of a Westernized lifestyle.
基金Supporting Program for funding this work under Project number(RSP2024R328),King Saud University,Riyadh,Saudi Arabia.
文摘The sedimentary geochemistry of St.Martin’s Island is important to determine the origin of the source rock,paleo weathering,tectonic setting,sediment recycling,maturity,sorting,redox condition,and paleo salinity of the sediments.Major oxides,trace elements,and rare earth elements(REEs)obtained from the INAA technique are presented by analyzing the sediment samples collected from the shoreline of St.Martin’s Island,Bangladesh.The elemental ratios,comparison with average upper continental crust(UCC),binary diagrams(Th/Sc vs.Sc,La/Th vs.Hf,Th/Co vs.La/Sc),and chondrite normalized REE patterns exhibit substantial LREE enrichment,relatively fl at HREE fractionation,considerable negative Eu anomalies(average:0.72),indicates the derivation from a source dominated by felsic rock,with contribution from intermediate source and mafi c component.Sediments from St.Martin’s Island exhibit the deposition of sediments in transitional environments of active and passive continental margin settings.Weathering indices value of CIA,PIA,CIW,CIX,and K 2 O/Rb ratio show moderate chemical weathering,indicating that the sediments are chemically mature.Sedimentary redox indicative proxies,such as U/Th,V/Cr,and V/Sc,show an oxic depositional environment during sediment deposition.The intermediate CIA and other weathering index values of the St.Martin’s sediments show that the area had semiarid and humid climatic conditions throughout the deposition.The Rb/K ratio of the St.Martin’s sediments suggests that the development and deposition of the sedimentary sequence of St.Martin’s Island mainly occurred in a brackish water environment during the geological past.
文摘Long March 12 Makes Debut Flight from New Commercial Spaceport China successfully launched a new carrier rocket into space from the Hainan commercial spacecraft launch site in the southern island province of Hainan on November 30,2024.The Long March-12 carrier rocket sent two experimental satellites into their planned orbits.The launch mission was a complete success,according to Hainan provincial authorities.The mission was the maiden flight of the Long March-12 carrier rocket,and the first launch mission undertaken by the Hainan commercial spacecraft launch site.
基金supported by the National Key R&D program(2023YFE0124900)the National Natural Science Foundation of China(32271606)the Research Project of Wenzhou Ecological Park Management Committee(SY2022ZD-1001-03).
文摘Managing invasive species requires identifying the factors that determine alien species invasion success.This study investigates how anthropogenic and biogeographical factors influence alien plant invasion in the Sanyang Wetlands,a human-dominated island system in Wenzhou City,China.Specifically,we analyzed whether human activities(e.g.,habitat heterogeneity,proportion of road area,and cultivation)and island characteristics(e.g.,island area,isolation)affect the diversity of native and invasive plant species similarly.We also assessed the applicability of the equilibrium theory of island biogeography to invasive plant species diversity and examined how these factors affect invasive plant species with different dispersal syndromes(anemochore,zoochore,and autochore).We found that both invasive and native species richness positively correlate with island area,habitat heterogeneity,and proportion of road area.However,although native species richness was negatively correlated with isolation,invasive species richness was not.The diversity and composition of invasive species with different dispersal syndromes were determined by different variables;for example,the composition and diversity of zoochores was increased by habitat heterogeneity,while anemochore species richness was increased by the proportion of road area,whereas anemochore species composition was influenced by distance to the nearest island.We conclude that habitat fragmentation differentially affects invasive and native plant diversity,aligning with the predictions of the equilibrium theory of island biogeography only for native species but not for invasive species.Our findings indicate that tailoring habitat attributes and regulating human activities could be effective strategies for mitigating the spread of invasive species in fragmented landscapes.
基金supported by the National Key R&D Program of China(Grant Nos.2022YFA1403201 and 2024YFA1408104)the National Natural Science Foundation of China(Grant Nos.11927809 and 12434004)the Natural Science Foundation of Jiangsu Province(Grant No.BK20233001)。
文摘By measuring scanning tunneling spectroscopy on some large Bi islands deposited on FeTe_(0.55)Se_(0.45)superconductors,we observe clear in-gap edge states with double peaks at about±1.0 me V on the spectra measured near the perimeter of the islands.This feature is very different from the single zero-energy peak observed on some other small Bi islands.The edge states spread towards the inner side of the islands over a width of 2-3 nm.The two edge-state peaks at positive and negative energies move to higher values with the increase of the magnetic field,and they disappear near the transition temperature of FeTe_(0.55)Se_(0.45).Meanwhile,enhanced superconducting gaps are observed in the central regions of these Bi islands,which may be induced by the enhanced pair potential of the topological surface state.Our observations provide a valuable message for the edge state and the proximity-induced superconductivity on specific Bi islands grown on FeTe_(0.55)Se_(0.45)substrate.
基金Sponsored by the Guangxi Philosophy and Social Sciences Research Annual Project(2024GLF036)Thousands of Young and Middle-aged Backbone Teachers Cultivation Program for Universities and Colleges in Guangxi(2021QGRW061).
文摘Weizhou Island,located in Beihai,Guangxi Province,is recognized as the largest paleovolcanic island in China,characterized by its relatively young geological age.The development of island tourism has progressively established it as a significant tourist attraction within Beihai,transforming the area into a prominent leisure and tourism resort.As tourism on Weizhou Island continues to develop both in scope and in depth,it has increasingly influenced the sense of gain among the local community residents.Currently,in alignment with the strategic objective of achieving common prosperity,it is crucial to comprehend and enhance the sense of gain experienced by residents in island tourism destinations,as this is vital for the achievement of this overarching goal.Taking the residents of Weizhou Island in Beihai as the subjects,this paper constructs their sense of gain related to tourism,employing grounded theory.It posits that the residents’sense of gain comprises four primary dimensions:sense of economic gain,sense of social gain,sense of cultural gain,and sense of environmental gain.Additionally,the paper examines the factors that influence these dimensions.Based on this foundation,effective strategies are proposed to enhance the sense of gain among community residents in island tourism destinations,thereby promoting the sustainable development of island tourism.
基金supported by the geological survey project(Grant No.DD20220992,Grant No.DD20242841,Grant No.DD20230592 and Grant No.DD20220993)Innovation Foundation of Science and Technology for“Nanhai New Star”Projects(Grant No.NHXXRCXM202353)of Hainan province。
文摘Islands are valuable land resources in the ocean,and their detailed subsurface seismic velocity structures are highly important for underground space utilization,engineering construction,and geological disaster prevention.Ambient noise tomography and the horizontal–vertical spectral ratio(HVSR)method use ambient noise recordings instead of earthquake signals to study the underground velocity structure,making them easy to implement on islands and consequently becoming potential optimization schemes for the investigation of detailed island structures.However,the application of these technologies to small granite islands along coasts is relatively insufficient,and the applicability needs to be further verified.This study ambient noise tomography and HVSR analysis were carried out by using a dense array of seismic data on Wuzhizhou Island,Hainan.It was found that natural activities mainly cause the ambient noise below 8 Hz on Wuzhizhou Island.Moreover,high-quality noise cross-correlation functions of 3–8 Hz can be extracted.The results of ambient noise tomography and HVSR analysis show that the underground S-wave velocity structure and sedimentary characteristics of Wuzhizhou Island are coupled with its topography.The high-terrain area of Wuzhizhou Island exhibits low-velocity anomalies,where a sedimentary layer did not develop.On the other hand,the low-terrain area of Wuzhizhou Island exhibits high-velocity anomalies,where a thin Quaternary sedimentary layer developed.These results imply that subsurface magmatic activity controls the island topography and affects the distribution of the island sedimentary layer.This study successfully verifies the feasibility of detection methods based on ambient noise in small granite islands along the coast.It also provides key basic information for studying the geological evolutionary history,island spatial planning,and geological disaster prevention of Wuzhizhou Island.
基金Under the auspices of National Natural Science Foundation of China(No.42471221)Major Projects of Key Research Base of Humanities and Social Sciences of Ministry of Education(No.22JJD790031)。
文摘The complex relationship between humans and nature plays a key role in shaping geographic landscapes.This study examines how tourism transforms island landscapes into marketable commodities,focusing on Guanglu Island in China from 2002–2025 through the lens of Actor-Network Theory(ANT).The findings reveal three main insights:1)commodification involves reimagining natural landscapes,digitizing them for broader appeal,and integrating them into tourist consumption.2)This process reshapes original landscapes into four interconnected forms:material landscapes,fluid landscapes,virtual landscapes,and psychological landscapes.3)Multiple actors drive commodification:the island’s natural conditions provide foundation and influence concrete ways of commodification,local government is deeply involved through planning and regulating tourism development,tourism practitioners adapt services to market demands,and tourist preferences guide the direction of commercialization.By analyzing the roles of both human and non-human actors,this research highlights how tourism redefines island landscapes while emphasizing the active influence of nature itself in these transformations.The findings reveal the geographical attributes of landscape commodification process and the multidimensionality and complexity of its impacts,thereby providing valuable insights for the sustainable development of island tourism.
基金supported by the National Natural Science Foundation of China(grant no.32371603,31901211 and 31930073).
文摘Habitat fragmentation dramatically reshapes species richness and community composition.However,most estimates ofβ-diversity rely on incidence-based metrics,which consider only species presence/absence.Here,we introduce a novel framework that explicitly incorporates species abundance and intraspecifictrait variation(ITV)into the quantificationof taxonomic,functional,and phylogeneticβ-diversity,allowing a more nuanced understanding of community differentiation.To demonstrate the utility of this framework,we quantifiedthe effects of island area and isolation onβ-diversity across plant communities in China's Thousand Island Lake.Abundance-weighted taxonomic multiple-site/pairwiseβ-diversity showed substantially higher nestedness and stronger nestedness-area relationship than incidence-based metrics,indicating that species-poor communities are not only subsets of richer ones but share similar abundance hierarchies,highlighting strong environmental filteringand hierarchical species sorting.We also found that the turnover component was less sensitive to isolation,suggesting limited dispersal effects.Incidence-based functional and phylogenetic distances increased with differences in island area,but these associations weakened or disappeared in abundance-weighted measures,suggesting stronger environmental filteringand functional/phylogenetic clustering among larger islands.Only abundance-weighted standardized effect sizes increased with island area differences.Additionally,ITV further amplifiedfunctional nestedness and buffered the influenceof isolation on turnover,emphasizing its role in mitigating dispersal limitations.By jointly considering abundance and ITV,two often-overlooked but critical dimensions,this study advances our understanding of how fragmentation shapesβ-diversity.These findingshighlight the importance of integrating abundanceweighted and trait-based metrics into conservation strategies to better detect functionally important species,prioritize larger habitat patches,and design biodiversity monitoring that captures withinspecies variation.
文摘Activity 1 Think about the following questions and write down your answers before reading the text.1.What are some possible ways animals can survive without access to fresh water sources?2.What other factors besides water could contribute to the thriving(茁壮成长)of a herd of goats on an isolated island?
文摘1 On December 26,2024,a remarkable act of heroism took place at Poospatuck Creek.Kayla Masotto,a 28⁃year⁃old resident of Mastic,Long Island,stepped into the role of a life⁃saver when she witnessed a man fall through the ice on the lake.2 At about 6 pm,Kayla was washing vegetables in the kitchen when her attention was suddenly caught by a boy skating alone on the lake.In a split second,she witnessed the ice beneath him break,and the boy fell into the water.Without any hesitation,Kayla immediately grabbed her paddleboard(桨叶式冲浪板)and ran across her backyard,reaching the edge of the lake in seconds.
文摘Background:Undernutrition poses a major threat for the growth and development of children in remote island regions of Bangladesh.Methods:This study investigated the prevalence and risk predictors of undernutrition among children under five in the island regions of Bangladesh.A cross‐sectional study was conducted in 13 unions across two islands,with a random sample of 549 children.Results:Descriptive analyses showed that underweight(Z‐score<−2),wasting(Z‐score<−2),and stunting(Z‐score<−2)were prevalent,with rates of 36.80%,24.60%,and 47.20%,respectively.Significant predictors of underweight included a history of diarrhea(AOR=2.24,p<0.001),acute respiratory infection(ARI)(AOR=1.84,p<0.01),anemic caregivers(AOR=1.52,p<0.05),and belonging to day labor families(AOR=0.29,p<0.01).Childhood wasting was significantly associated with partial vaccination(AOR=2.84,p<0.001),large family size(AOR=1.79,p<0.05),higher birth order(AOR=0.58,p<0.05),diarrhea(AOR=3.09,p<0.001),anemic mothers(AOR=1.89,p<0.05),primary(AOR=3.35,p<0.05)and secondary(AOR=4.11,p<0.01)maternal education,and fathers working abroad(AOR=0.42,p<0.05)or as daily laborers(AOR=0.17,p<0.001).Stunting was more common among children with partial vaccination,diarrhea,and ARI,and less common among those with a history of fever or those from day laborer families.Conclusion:Overall,undernutrition among children in the island areas of Bangladesh is influenced by multiple factors,necessitating a multisectoral approach to improve their nutritional status.
基金the Hainan Provincial Natural Science Foundation of China(No.325RC675)the Starting Research Fund from the Hainan University(No.KYQD(ZR)-21004)。
文摘Hainan Island is one of the largest islands in China and is located in the Indo-Burma biodiversity hotspot region.Despite its ecological significance,comprehensive population genetic studies of key marine organisms along the entire coastline of Hainan Island have not been reported.This study examined the genetic diversity and population structure of the widely distributed oyster Saccostrea malabonensis around Hainan Island with analyzing mitochondrial COI gene sequences.The impacts of geographical,environmental and anthropogenic factors on genetic differentiation were also investigated.The results revealed a significant AT bias in the COI gene sequences,with transitions as the main mutation type.A total of 103 variable sites and 107 haplotypes were identified from480 COI sequences,with haplotype diversities from 0.067 to 0.782,and nucleotide diversities between 0.00011 and 0.00278.AMOVA analysis indicated that 86.65%of the variation occurred within one population while 13.35%among different populations.The average genetic distance across 16 populations was 0.00169,and the average genetic differentiation index was 0.13353.Distinct population patterns can be observed.The populations of Tonghai Village(THV)and Gangmen Mountain(GMM)in Lingshui showed similar genetic structures while those of Wanquan River Estuary(WQRE,Qionghai)and Wuzhizhou Island(WZZI,Sanya)displayed divergent evolutionary trends.Cluster analysis grouped the 480 individuals of S.malabonensis into six subpopulations.These findings are helpful for developing conservation strategies and genetic breeding programs,and are also helpful for understanding the evolutionary history of this oyster species in Hainan Island.
文摘In Michigan,the US“car capital of the world”where major automakers first started,there's a special island called Mackinac Island.This small island,only 9.8 square kilometers in size,has a strict rule:no cars are allowed here—not even golf carts.Around 600 people live on the island all year round,and horses are the real“kings”that keep daily life running.
