Suaeda salsa is an important local species in the intertidal beach of the Western Pacific coast. However,under the artificial cofferdam and Spartina alterniflora expansion,Suaeda marsh has degraded seriously. Therefor...Suaeda salsa is an important local species in the intertidal beach of the Western Pacific coast. However,under the artificial cofferdam and Spartina alterniflora expansion,Suaeda marsh has degraded seriously. Therefore,using Yancheng Nature Reserve as a case study area,taking ETM+images in 2000,2006 and 2011 as the basic data sources,we revealed the evolution characteristics of Salsa marsh which was impacted. The research results are as follows. From 2000 to 2011,Salsa marsh area in the artificial area tempestuously degraded,decreasing by 87. 158%,more than 22% than those in the natural area. The landscape was fragmentized. Landscape polymerization degree index dropped from 95. 780 to 65. 455,more than 16% than those in the natural area. The mean patch area fell down to 21. 429 ha from 389. 333 ha,more than 11% that in the natural area. Compared to the steady change in natural conditions,the area was reduced by 118. 167 ha/a from 2000 to 2006,while during 2006-2011,it was only 51. 500 ha/a in artificial area. As for spatial change of landscape,in artificial area,the Salsa marsh centroid moved forward to the southeast with 666. 350 m,but that in natural area moved forward to the north with 1 042. 710 m from 2000 to 2006. From 2006 to 2011,the centroid moved forward to east and north respectively. Artificial cofferdam transformed the area into freshwater ecosystem,and meanwhile the freshwater was beneficial to Reed marsh. During 2000 to 2006,in the artificial area,539 ha Salsa marsh controlled by cofferdam transferred into reed marsh and aquaculture ponds,of which the transformation rate was nearly 4% higher than that in natural area. From 2006 to 2011,178 ha Salsa marsh was transferred into reed marsh,the transformation rate was 20% higher than that in natural area. With rapid spreading and strong competition of Spartina species,the coastal wetland has formed the pattern of " Salsa – Spartina marshes". From 2000 to 2006,in artificial area,15. 24% of Salsa marsh was transferred into Spartina marsh,of which the transformation rate was13% higher than that in natural area. And from 2006 to 2011,30. 07% Salsa marsh was replaced by the Spartina marsh in artificial area,the rate was almost 10% higher than that in the natural area.展开更多
[Objective] The reseamh aimed to contrast and analyze CG activity rules in Lianyungang and Yancheng. [Method] By using lightning location data, basic characteristics of lightning activities in Lianyungang and Yancheng...[Objective] The reseamh aimed to contrast and analyze CG activity rules in Lianyungang and Yancheng. [Method] By using lightning location data, basic characteristics of lightning activities in Lianyungang and Yancheng both located at the eastem coast of Jiangsu were analyzed and contrasted. [Result] CG characteristics in Uanyungang and Yancheng were same, and negative CG was dominant. Monthly change activity rule of CG basically presented single-peak distribution, and peak value appeared in August. Monthly change of the lightning was drastic, and high- occurrence period was both in summer. Daily change trend of CG in the two sites was consistent. High-occurrence period of the lightning was in af- temoon and early morning, and occurrence frequency of the lightning in the morning was less. Spatial distribution of CG in Lianyungang and Yancheng was very uneven. Lightning activity in Lianyungang mainly concentrated in northwest and southeast areas of Donghai County and western area of Guannan County. Especially in Donghai County, it was the area where lightning strike density was the maximum. Lightning strike activity in Yanchang was more concentrated, and mainly concentrated in the west, namely near Jiangying Town and Louwang Town. Distribution characteris- tics of CG intensities in the two sites were same. Waveform changes of the positive CG in the two sites were slower than that of the negative CG, and current intensity concentrated from ＋ 20 to ~ 50 kA. [ Conclusion ] By contrasting and analyzing lightning activity rules in Lianyungang and Yanchang, we could share and complement data in the two cities better, and serve for routine lightning prevention and early-warning better.展开更多
From the perspective of man–land relationship, Yancheng City(ruins of Yancheng in the Spring and Autumn Period) as a typical theme tourist destination is selected to construct the structural model of driving effect o...From the perspective of man–land relationship, Yancheng City(ruins of Yancheng in the Spring and Autumn Period) as a typical theme tourist destination is selected to construct the structural model of driving effect of tourist destination attributes on tourists' place attachment, and carry out the empirical research. The results show that attributes of Yancheng City contain 4 dimensions, and tourists' perception of the attributes declines in the sequence "recreational and entertainment attribute→ attribute of culture of the Spring and Autumn Period→ attribute of landscapes and ruins→ attribute of humanistic concern"; the four-dimension attributes vary greatly in driving tourists' place attachment, recreational and entertainment attribute and attribute of culture of the Spring and Autumn Period have obvious positive driving effect, attribute of landscapes and ruins and attribute of humanistic concern have poorer driving effect; generally speaking, driving effect of tourist destination attributes on tourists' place attachment is demonstrated as "highlighted value functions of tourist destination attributes→‘predominant area' of tourists' perceptual experience→ obvious driving effect on tourists' place attachment" and "hysteretic value functions of tourist destination attributes→‘vulnerable area' of tourists' perceptual experience→ weakened driving effect on tourists' place attachment"; driving effect of the overall attributes of tourist destination on tourists' place attachment is to be further improved and optimized.展开更多
Culture is an essential condition for the rapid and healthy development of the tourism industry.However,tourism provides a platform for cultural exchange and communication,injecting a strong impetus to the development...Culture is an essential condition for the rapid and healthy development of the tourism industry.However,tourism provides a platform for cultural exchange and communication,injecting a strong impetus to the development of the cultural industry.Under the background of the era that both culture and tourism industries have become national strategies,how to promote and realize the combination and interaction of culture and tourism industry is a practical problem that needs to be solved urgently.Based on taking Yancheng salt culture and seashore wetland ecological culture as the case analysis,this article hackles the integration advantages of Yancheng and tries to find out the deficiencies.On the basis of the evaluation and analysis between culture and the differences in the comprehensive development level of tourism industry,this paper discusses the characteristics and mechanism of the combination of culture and tourism industry,proposes a coordinated development pattern of culture and tourism industry,and on this basis provides the corresponding strategies and suggestions of this pattern in Yancheng.展开更多
Yancheng City, once neglected by investors, has become the focus of foreign investment in recent years. Beginning in 1987 and to the end of 1993, Yancheng had set up 875 foreign-funded enterprises, making use of US$22...Yancheng City, once neglected by investors, has become the focus of foreign investment in recent years. Beginning in 1987 and to the end of 1993, Yancheng had set up 875 foreign-funded enterprises, making use of US$226 million in foreign capital—530 of them approved last year alone with foreign capital worth US$109 million. Those in operation rank among the most advanced foreign-funded enterprises in Jiangsu Province and the country.展开更多
The Yancheng Sag is a favorable exploration area in the Subei Basin. However, the key geological understanding of the natural gas source and reservoir formation characteristics of the sag is still controversial. Based...The Yancheng Sag is a favorable exploration area in the Subei Basin. However, the key geological understanding of the natural gas source and reservoir formation characteristics of the sag is still controversial. Based on a set of organic geochemical experiments conducted on natural gas and associated condensate oil of the first member of the Funing Formation (E1f1) in well YCh5 and well data analysis, the oil-gas resources and reservoir formation model in the Zhujiadun gas reservoir in the Yancheng Sag, Subei Basin, were investigated. The results of this study are as follows. (1) The natural gas in the Zhujiadun gas reservoir is dry gas with high methane content, low heavy hydrocarbon content, and high maturity. The characteristics of carbon and hydrogen isotopes in the natural gas indicate that the natural gas is oil-cracked gas, which mainly originates from the source rocks of the Permian Qixia Formation. (2) The condensate oil from well YCh5 with a high degree of maturity has a high pristane/phytane ratio, low gamma-paraffin abundance, and low tricyclic terpene abundance, indicating a mixture of the Upper Paleozoic condensate oil and Cenozoic crude oil. The saturated and aromatic hydrocarbons have similar δ13C values to the Cenozoic continental crude oil. These features suggest two sources of condensate oil. (3) Oils generated from the source rocks of the Qixia Formation were cracked into highly mature gas after deep burial, which migrated along large faults into the sandstones of the E1f1 and K1t1 members. This type of reservoir was effectively preserved beneath the overlying mudstone cap rocks. Therefore, it can be inferred that a play fairway might occur in the eastern zone of the faults connected to the Paleozoic source rocks in the Yancheng Sag since this zone has similar petroleum geological conditions to well YCh5. Therefore, this zone is a favorable area for further exploration.展开更多
This study used remote sensing and GIS to analyze the landscape pattern changes in the Yancheng Nature Reserve from 1983 to 2018,established an evaluation index system based on the regional natural-socio-economic comp...This study used remote sensing and GIS to analyze the landscape pattern changes in the Yancheng Nature Reserve from 1983 to 2018,established an evaluation index system based on the regional natural-socio-economic complex ecosystem security pattern,and then analyzed the spatial characteristics of ecological security changes and discusses reasons for these changes.The results show that the landscape pattern changed dramatically from natural landscape to a mixture of natural landscape and artificial landscape from 1983 to 2018 due to the intensification of human activities.At present,the ecological security status of the protected areas is not optimistic.From the perspective of the survival status of red-crowned cranes,the protected areas are suitable.However,due to the increase of human activities and policy adjustments,the habitat of red-crowned cranes is fragmented.The red-crowned crane currently gathers in localized areas such as the core area and the buffer zone.We should pay more attention to management,policy development and the environmental awareness of local residents.At the same time,it is necessary to reduce the intensity of human activities within the reserve.展开更多
基金Supported by National Natural Science Foundation of China(41771199)Basic Research Project of Jiangsu Province,China(BK20171277)
文摘Suaeda salsa is an important local species in the intertidal beach of the Western Pacific coast. However,under the artificial cofferdam and Spartina alterniflora expansion,Suaeda marsh has degraded seriously. Therefore,using Yancheng Nature Reserve as a case study area,taking ETM+images in 2000,2006 and 2011 as the basic data sources,we revealed the evolution characteristics of Salsa marsh which was impacted. The research results are as follows. From 2000 to 2011,Salsa marsh area in the artificial area tempestuously degraded,decreasing by 87. 158%,more than 22% than those in the natural area. The landscape was fragmentized. Landscape polymerization degree index dropped from 95. 780 to 65. 455,more than 16% than those in the natural area. The mean patch area fell down to 21. 429 ha from 389. 333 ha,more than 11% that in the natural area. Compared to the steady change in natural conditions,the area was reduced by 118. 167 ha/a from 2000 to 2006,while during 2006-2011,it was only 51. 500 ha/a in artificial area. As for spatial change of landscape,in artificial area,the Salsa marsh centroid moved forward to the southeast with 666. 350 m,but that in natural area moved forward to the north with 1 042. 710 m from 2000 to 2006. From 2006 to 2011,the centroid moved forward to east and north respectively. Artificial cofferdam transformed the area into freshwater ecosystem,and meanwhile the freshwater was beneficial to Reed marsh. During 2000 to 2006,in the artificial area,539 ha Salsa marsh controlled by cofferdam transferred into reed marsh and aquaculture ponds,of which the transformation rate was nearly 4% higher than that in natural area. From 2006 to 2011,178 ha Salsa marsh was transferred into reed marsh,the transformation rate was 20% higher than that in natural area. With rapid spreading and strong competition of Spartina species,the coastal wetland has formed the pattern of " Salsa – Spartina marshes". From 2000 to 2006,in artificial area,15. 24% of Salsa marsh was transferred into Spartina marsh,of which the transformation rate was13% higher than that in natural area. And from 2006 to 2011,30. 07% Salsa marsh was replaced by the Spartina marsh in artificial area,the rate was almost 10% higher than that in the natural area.
基金the Project of Science and Technology Bureau in Lianyungang City,China(SH1207)
文摘[Objective] The reseamh aimed to contrast and analyze CG activity rules in Lianyungang and Yancheng. [Method] By using lightning location data, basic characteristics of lightning activities in Lianyungang and Yancheng both located at the eastem coast of Jiangsu were analyzed and contrasted. [Result] CG characteristics in Uanyungang and Yancheng were same, and negative CG was dominant. Monthly change activity rule of CG basically presented single-peak distribution, and peak value appeared in August. Monthly change of the lightning was drastic, and high- occurrence period was both in summer. Daily change trend of CG in the two sites was consistent. High-occurrence period of the lightning was in af- temoon and early morning, and occurrence frequency of the lightning in the morning was less. Spatial distribution of CG in Lianyungang and Yancheng was very uneven. Lightning activity in Lianyungang mainly concentrated in northwest and southeast areas of Donghai County and western area of Guannan County. Especially in Donghai County, it was the area where lightning strike density was the maximum. Lightning strike activity in Yanchang was more concentrated, and mainly concentrated in the west, namely near Jiangying Town and Louwang Town. Distribution characteris- tics of CG intensities in the two sites were same. Waveform changes of the positive CG in the two sites were slower than that of the negative CG, and current intensity concentrated from ＋ 20 to ~ 50 kA. [ Conclusion ] By contrasting and analyzing lightning activity rules in Lianyungang and Yanchang, we could share and complement data in the two cities better, and serve for routine lightning prevention and early-warning better.
基金Sponsored by National Natural Science Foundation(41401152)Humanities and Social Sciences Youth Program of the Ministry of Education(14YJCZH228)2013 Key Humanities and Social Sciences Program of Nanjing Institute of Industry Technology(YK13-05-03)
文摘From the perspective of man–land relationship, Yancheng City(ruins of Yancheng in the Spring and Autumn Period) as a typical theme tourist destination is selected to construct the structural model of driving effect of tourist destination attributes on tourists' place attachment, and carry out the empirical research. The results show that attributes of Yancheng City contain 4 dimensions, and tourists' perception of the attributes declines in the sequence "recreational and entertainment attribute→ attribute of culture of the Spring and Autumn Period→ attribute of landscapes and ruins→ attribute of humanistic concern"; the four-dimension attributes vary greatly in driving tourists' place attachment, recreational and entertainment attribute and attribute of culture of the Spring and Autumn Period have obvious positive driving effect, attribute of landscapes and ruins and attribute of humanistic concern have poorer driving effect; generally speaking, driving effect of tourist destination attributes on tourists' place attachment is demonstrated as "highlighted value functions of tourist destination attributes→‘predominant area' of tourists' perceptual experience→ obvious driving effect on tourists' place attachment" and "hysteretic value functions of tourist destination attributes→‘vulnerable area' of tourists' perceptual experience→ weakened driving effect on tourists' place attachment"; driving effect of the overall attributes of tourist destination on tourists' place attachment is to be further improved and optimized.
基金This paper is funded by Jiangsu Provincial Social Science Foundation Cooperation Project“A Study on the Inheritance and Development of Characteristic Rural Culture in Yancheng”(17XZB013).
文摘Culture is an essential condition for the rapid and healthy development of the tourism industry.However,tourism provides a platform for cultural exchange and communication,injecting a strong impetus to the development of the cultural industry.Under the background of the era that both culture and tourism industries have become national strategies,how to promote and realize the combination and interaction of culture and tourism industry is a practical problem that needs to be solved urgently.Based on taking Yancheng salt culture and seashore wetland ecological culture as the case analysis,this article hackles the integration advantages of Yancheng and tries to find out the deficiencies.On the basis of the evaluation and analysis between culture and the differences in the comprehensive development level of tourism industry,this paper discusses the characteristics and mechanism of the combination of culture and tourism industry,proposes a coordinated development pattern of culture and tourism industry,and on this basis provides the corresponding strategies and suggestions of this pattern in Yancheng.
文摘Yancheng City, once neglected by investors, has become the focus of foreign investment in recent years. Beginning in 1987 and to the end of 1993, Yancheng had set up 875 foreign-funded enterprises, making use of US$226 million in foreign capital—530 of them approved last year alone with foreign capital worth US$109 million. Those in operation rank among the most advanced foreign-funded enterprises in Jiangsu Province and the country.
基金funded by a project entitled Middle-Paleozoic Hydrocarbon Accumulation Conditions and Favorable Area Evaluation of the Subei-South Yellow Sea Basin (P21086-6), initiated by the Sinopec Oilfield Service Corporation.
文摘The Yancheng Sag is a favorable exploration area in the Subei Basin. However, the key geological understanding of the natural gas source and reservoir formation characteristics of the sag is still controversial. Based on a set of organic geochemical experiments conducted on natural gas and associated condensate oil of the first member of the Funing Formation (E1f1) in well YCh5 and well data analysis, the oil-gas resources and reservoir formation model in the Zhujiadun gas reservoir in the Yancheng Sag, Subei Basin, were investigated. The results of this study are as follows. (1) The natural gas in the Zhujiadun gas reservoir is dry gas with high methane content, low heavy hydrocarbon content, and high maturity. The characteristics of carbon and hydrogen isotopes in the natural gas indicate that the natural gas is oil-cracked gas, which mainly originates from the source rocks of the Permian Qixia Formation. (2) The condensate oil from well YCh5 with a high degree of maturity has a high pristane/phytane ratio, low gamma-paraffin abundance, and low tricyclic terpene abundance, indicating a mixture of the Upper Paleozoic condensate oil and Cenozoic crude oil. The saturated and aromatic hydrocarbons have similar δ13C values to the Cenozoic continental crude oil. These features suggest two sources of condensate oil. (3) Oils generated from the source rocks of the Qixia Formation were cracked into highly mature gas after deep burial, which migrated along large faults into the sandstones of the E1f1 and K1t1 members. This type of reservoir was effectively preserved beneath the overlying mudstone cap rocks. Therefore, it can be inferred that a play fairway might occur in the eastern zone of the faults connected to the Paleozoic source rocks in the Yancheng Sag since this zone has similar petroleum geological conditions to well YCh5. Therefore, this zone is a favorable area for further exploration.
基金The Fund for Building World-class Universities(disciplines)of Renmin University of China(2019)
文摘This study used remote sensing and GIS to analyze the landscape pattern changes in the Yancheng Nature Reserve from 1983 to 2018,established an evaluation index system based on the regional natural-socio-economic complex ecosystem security pattern,and then analyzed the spatial characteristics of ecological security changes and discusses reasons for these changes.The results show that the landscape pattern changed dramatically from natural landscape to a mixture of natural landscape and artificial landscape from 1983 to 2018 due to the intensification of human activities.At present,the ecological security status of the protected areas is not optimistic.From the perspective of the survival status of red-crowned cranes,the protected areas are suitable.However,due to the increase of human activities and policy adjustments,the habitat of red-crowned cranes is fragmented.The red-crowned crane currently gathers in localized areas such as the core area and the buffer zone.We should pay more attention to management,policy development and the environmental awareness of local residents.At the same time,it is necessary to reduce the intensity of human activities within the reserve.
