Understanding wetland change is critical to establishing and implementing international conservation and management conventions.With such knowledge,supporting sustainable development,making management decisions,improv...Understanding wetland change is critical to establishing and implementing international conservation and management conventions.With such knowledge,supporting sustainable development,making management decisions,improving policies,and conducting scientific research become possible.However,consistent information on changes in Chinese wetlands has been unavailable.We applied the hybrid object-based and hierarchical classification approach to∼53,000 scenes of Landsat images acquired between 1980 and 2020 and created a national wetland mapping product(China_Wetlands)for six periods(e.g.,1980,1990,2000,2010,2015,and 2020).China_Wetlands revealed diverse changes in Chinese wetlands and their trajectories in response to climate change and human impacts over the past four decades.Specifically,there was a substantial shrinkage in wetland area before 2015,with a small rebound between 2015 and 2020.The net loss was∼60.9×10^(3)km^(2),which represents 12%of the area in 1980.However,the loss of natural wetlands was hidden by human-made wetland gain with an offset of 15.6×10^(3)km^(2).Additionally,the expansion of surface water extent approximately 14.0×10^(3)km^(2)obscured the loss of vegetated wetlands.Wetland loss in hotspot areas(e.g.,Sanjiang Plain and Yangtze River Delta)should not be neglected.The sustainable management and effective conservation of wetlands in China should target wetland areas,landscape structures,and small wetlands delivering important ecosystem services.Moreover,the conversion of wetland types and the invasion of alien species need to be monitored and regulated.China_Wetlands will be a critical wetland dataset for ecological research and the assessment of national and global environmental objectives(e.g.,the United Nation’s sustainable development goals).展开更多
National nature reserves are an important part of classification management on ecological protection in China. Taking the national nature reserves of Jilin Province as examples, this paper introduced the stability ind...National nature reserves are an important part of classification management on ecological protection in China. Taking the national nature reserves of Jilin Province as examples, this paper introduced the stability index by referring to the intensity model of landuse and land-cover change(LUCC), and analyzed the overall stability of land-use and land-cover(LULC) in the study area from the time interval level and land category level. The stability of LULC in different types of nature reserves was tracked and identified by extracting land-use change trajectory, and the land-use change trajectory was divided into three types: stable type, sub-stable type and unstable type. The impact of LUCC on regional ecosystem services was studied by using hotspot analysis and gravity center analysis. The results showed that: 1) The LULC in the study area was stable on the whole, and the proportion of stable land area reached 86.08%. The intensity of LUCC showed an increasing trend in recent 20 years, and the conversion of cultivated land and construction land was active in continuous time interval. 2) The stability of LULC in forest ecological reserves and wildlife reserves in the eastern part of Jilin Province was the highest, while that in inland wetland reserves and geological relic reserves in the central and western part of Jilin Province was lower.3) The LUCC in national nature reserves not only changed the value of its own ecosystem service function, but also affected the ecosystem service function of the whole region. The combination of intensity analysis and land-use change trajectory was used to identify the characteristics of stability of LULC in nature reserves, which was conducive to deeply understand the process of LUCC in national nature reserves and provided reasonable suggestions for regional ecological protection.展开更多
Objective： To understand the changing trajectory of quality of life（QOL） during the treatment courses of breast cancer patients during chemotherapy and to investigate the factors in each treatment course that affec...Objective： To understand the changing trajectory of quality of life（QOL） during the treatment courses of breast cancer patients during chemotherapy and to investigate the factors in each treatment course that affect QOL.Methods： The M.D. Anderson Symptom Inventory Scale, the Hospital Anxiety and Depression Scale（HADS）, and the Functional Assessment of Cancer Therapy-Breast（FACT-B） scale were used to perform a survey on 174 breast cancer patients who received the TAC（docetaxel, Adriamycin, and cyclophosphamide） chemotherapy regimen before postoperative chemotherapy and 5-7 days after each chemotherapy course.Results： The QOL scores of the breast cancer patients were the lowest before the postoperative chemotherapy（81.2 ± 19.6） and the highest after the second chemotherapy course（94.5 ± 14.4）. After the fourth and fifth chemotherapy courses, the scores were much lower again, with values of 82.7 ± 13.9and 82.6 ± 13.1, respectively. The scores improved again after the sixth chemotherapy course（93.9 ± 18.7）. Furthermore, each treatment course had different related symptoms that affected the QOL of the patients.Conclusions： More attention should be paid to the changing trajectory of QOL of patients in all treatment courses and to the influence of treatment-related symptoms on the QOL of patients; moreover, interventions should be adopted by medical care personnel to increase QOL in cancer patients.展开更多
基金funded by the National Natural Science Foundation of China(42222103,42171379,and 42101379)the Open Research Program of the International Research Center of Big Data for Sustainable Development Goals(CBAS2023ORP04)the Youth Innovation Promotion Association of Chinese Academy of Sciences(2017277).
文摘Understanding wetland change is critical to establishing and implementing international conservation and management conventions.With such knowledge,supporting sustainable development,making management decisions,improving policies,and conducting scientific research become possible.However,consistent information on changes in Chinese wetlands has been unavailable.We applied the hybrid object-based and hierarchical classification approach to∼53,000 scenes of Landsat images acquired between 1980 and 2020 and created a national wetland mapping product(China_Wetlands)for six periods(e.g.,1980,1990,2000,2010,2015,and 2020).China_Wetlands revealed diverse changes in Chinese wetlands and their trajectories in response to climate change and human impacts over the past four decades.Specifically,there was a substantial shrinkage in wetland area before 2015,with a small rebound between 2015 and 2020.The net loss was∼60.9×10^(3)km^(2),which represents 12%of the area in 1980.However,the loss of natural wetlands was hidden by human-made wetland gain with an offset of 15.6×10^(3)km^(2).Additionally,the expansion of surface water extent approximately 14.0×10^(3)km^(2)obscured the loss of vegetated wetlands.Wetland loss in hotspot areas(e.g.,Sanjiang Plain and Yangtze River Delta)should not be neglected.The sustainable management and effective conservation of wetlands in China should target wetland areas,landscape structures,and small wetlands delivering important ecosystem services.Moreover,the conversion of wetland types and the invasion of alien species need to be monitored and regulated.China_Wetlands will be a critical wetland dataset for ecological research and the assessment of national and global environmental objectives(e.g.,the United Nation’s sustainable development goals).
基金Under the auspices of National Natural Science Foundation of China(No.42071255)。
文摘National nature reserves are an important part of classification management on ecological protection in China. Taking the national nature reserves of Jilin Province as examples, this paper introduced the stability index by referring to the intensity model of landuse and land-cover change(LUCC), and analyzed the overall stability of land-use and land-cover(LULC) in the study area from the time interval level and land category level. The stability of LULC in different types of nature reserves was tracked and identified by extracting land-use change trajectory, and the land-use change trajectory was divided into three types: stable type, sub-stable type and unstable type. The impact of LUCC on regional ecosystem services was studied by using hotspot analysis and gravity center analysis. The results showed that: 1) The LULC in the study area was stable on the whole, and the proportion of stable land area reached 86.08%. The intensity of LUCC showed an increasing trend in recent 20 years, and the conversion of cultivated land and construction land was active in continuous time interval. 2) The stability of LULC in forest ecological reserves and wildlife reserves in the eastern part of Jilin Province was the highest, while that in inland wetland reserves and geological relic reserves in the central and western part of Jilin Province was lower.3) The LUCC in national nature reserves not only changed the value of its own ecosystem service function, but also affected the ecosystem service function of the whole region. The combination of intensity analysis and land-use change trajectory was used to identify the characteristics of stability of LULC in nature reserves, which was conducive to deeply understand the process of LUCC in national nature reserves and provided reasonable suggestions for regional ecological protection.
基金supported by a project of scientific research of the Affiliated Hospital of Luzhou Medical College(No.14039)
文摘Objective： To understand the changing trajectory of quality of life（QOL） during the treatment courses of breast cancer patients during chemotherapy and to investigate the factors in each treatment course that affect QOL.Methods： The M.D. Anderson Symptom Inventory Scale, the Hospital Anxiety and Depression Scale（HADS）, and the Functional Assessment of Cancer Therapy-Breast（FACT-B） scale were used to perform a survey on 174 breast cancer patients who received the TAC（docetaxel, Adriamycin, and cyclophosphamide） chemotherapy regimen before postoperative chemotherapy and 5-7 days after each chemotherapy course.Results： The QOL scores of the breast cancer patients were the lowest before the postoperative chemotherapy（81.2 ± 19.6） and the highest after the second chemotherapy course（94.5 ± 14.4）. After the fourth and fifth chemotherapy courses, the scores were much lower again, with values of 82.7 ± 13.9and 82.6 ± 13.1, respectively. The scores improved again after the sixth chemotherapy course（93.9 ± 18.7）. Furthermore, each treatment course had different related symptoms that affected the QOL of the patients.Conclusions： More attention should be paid to the changing trajectory of QOL of patients in all treatment courses and to the influence of treatment-related symptoms on the QOL of patients; moreover, interventions should be adopted by medical care personnel to increase QOL in cancer patients.
