Distribution pattern of finless porpoises at the junction of the Yangtze River and Poyang Lake observed by towed passive acoustic device

2011 ◽  
Vol 130 (4) ◽  
pp. 2460-2460
Author(s):  
Satoko Kimura ◽  
Tomonari Akamatsu ◽  
Songhai Li ◽  
Lijun Dong ◽  
Kexiong Wang ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Yangtze River ◽  
Poyang Lake ◽  
The Yangtze River ◽  
Acoustic Device ◽  
Passive Acoustic

Comparison between visual and passive acoustic detection of finless porpoises in the Yangtze River, China

2001 ◽  
Vol 109 (4) ◽  
pp. 1723-1727 ◽  
Author(s):  
Tomonari Akamatsu ◽  
Ding Wang ◽  
Kexiong Wang ◽  
Zhou Wei
Keyword(s):  
Yangtze River ◽  
Acoustic Detection ◽  
The Yangtze River ◽  
Passive Acoustic

scholarly journals Timing and causes of the distribution pattern of Oncomelania hupensis estimated by molecular and geologic data

2018 ◽  
Author(s):  
Wen-bin Ji ◽  
Shu-xin Xu ◽  
Jun Bai ◽  
Ying-yi Cui ◽  
Xian-min Zhou ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Schistosoma Japonicum ◽  
Yangtze River ◽  
Molecular Data ◽  
The Philippines ◽  
Tibet Plateau ◽  
Snail Species ◽  
The Yangtze River ◽  
Oncomelania Hupensis ◽  
Distribution Ranges

Abstract:As the only intermediate host of Schistosoma japonicum, Oncomelania hupensis plays an irreplaceable role in the prevalence of schistosomiasis japonica. Several living subspecies of Oncomelania hupensis are found in Asia, especially in China, Japan,the Philippines, and Sulawesi of Indonesia. The existing geographical distribution pattern of O. hupensis has been influenced by geological events. This study used existing mitochondrial gene data for O. hupensis in the GenBank database and the molecular clock method to estimate the divergence time of each subspecies of O. hupensis. For the first time, the timing and causes of the distribution pattern of the different O. hupensis subspecies were studied by combining molecular data with data on geologic events. The results showed that the uplift and isolation of the Qinghai-Tibet Plateau caused Oncomelania hupensis robertsoni to differentiate 4.76 Ma(Million anniversary), while Oncomelania hupensis guangxiensis was affected by the third Himalayan orogenic movement, differentiating 1.10 Ma. Oncomelania hupensis nosophora was influenced by the formation of the Yonaguni Strait and diverged 1.43 Ma. Influenced by ice ages and interglacial periods, Oncomelania hupensis tangi and Oncomelania hupensis formosana diverged 0.57 Ma. The link of the ancient Yangtze River promoted the spread of O. hupensis to the middle and lower reaches of the Yangtze River, and the developed water network facilitated gene exchange among Oncomelania hupensis hupensis in the area. Eventually, 0.62 Ma, O. h. hupensis differentiated.Author summaryPhylogenetic analysis of Pomatiopsidae species showed that Oncomelania was isolated from other genera and clustered independently in phylogenetic trees. Further analysis of the species Oncomelania hupensis and its subspecies was performed. The snail species O. hupensis has multiple subspecies that exhibit certain differences. These subspecies are distributed across Asia, from China’s Yunnan Province in the west to Japan in the east and south to the Philippines and Indonesia. In addition, the subspecies are widespread in the middle and lower reaches of the Yangtze River in China, and the distribution ranges of the different subspecies do not overlap. The formation of this distribution pattern of each subspecies of O. hupensis has a profound impact on the prevalence of Schistosoma japonicum. Therefore, the authors analyzed molecular data and geological historical events to investigate the timing and causes of the distribution pattern of each subspecies of O. hupensis.

scholarly journals Analysis on the Water Exchange between the Main Stream of the Yangtze River and the Poyang Lake

2011 ◽  
Vol 10 ◽  
pp. 2256-2264 ◽  
Author(s):  
Junkai Zhao ◽  
Jiufa Li ◽  
Hong Yan ◽  
Lin Zheng ◽  
Zhijun Dai
Keyword(s):  
Yangtze River ◽  
Water Exchange ◽  
Poyang Lake ◽  
Main Stream ◽  
The Yangtze River

scholarly journals A modeling study of the influences of Yangtze River and local catchment on the development of floods in Poyang Lake, China

2016 ◽  
Vol 47 (S1) ◽  
pp. 102-119 ◽  
Author(s):  
Xianghu Li ◽  
Jing Yao ◽  
Yunliang Li ◽  
Qi Zhang ◽  
Chong-Yu Xu
Keyword(s):  
Yangtze River ◽  
Lake Level ◽  
Poyang Lake ◽  
Hydrological Regime ◽  
The Yangtze River ◽  
Lake Level Changes ◽  
The North ◽  
Physically Based ◽  
North And South ◽  
Catchment Runoff

Poyang Lake, one of the most frequently flooded regions in China, connects with the Yangtze River and the five sub-tributaries in the local catchment. The lake's hydrological regime is complicated by a complex hydraulic connection and strong river–lake interaction, especially for the extreme hydrological regime. This study analyzes the relationships between the lake level changes and the flow regimes of Yangtze River and local catchment during the flood season and employs a physically based hydrodynamic model to quantify their relative contributions to the development of floods. The study found that the large catchment runoff and Yangtze River discharge were both significant contributors to flood development but that their contributions were unevenly distributed in time and space. The local catchment imposed more influence during the period of April–May and at the middle parts of the lake, and its influence decreased toward the north and south; in contrast, the most remarkable lake level changes were observed in July–August and at the northern lake for the Yangtze River cases, and these changes reduced from north to south. Moreover, Yangtze River imposed far stronger influences on the lake level changes than the catchment runoff and dominated the duration of floods to a great extent.

scholarly journals Changes in Tundra Swan Cygnus columbianus bewickii distribution and abundance in the Yangtze River floodplain

2011 ◽  
Vol 21 (3) ◽  
pp. 260-265 ◽  
Author(s):  
PEIHAO CONG ◽  
LEI CAO ◽  
ANTHONY D. FOX ◽  
MARK BARTER ◽  
EILEEN C. REES ◽  
...  
Keyword(s):  
Water Quality ◽  
Yangtze River ◽  
Poyang Lake ◽  
Submerged Vegetation ◽  
Three Gorges ◽  
The Yangtze River ◽  
Vegetation Productivity ◽  
River Floodplain ◽  
Cygnus Columbianus ◽  
Tundra Swan

Approximately 75% of the East Asian Flyway Tundra Swan Cygnus columbianus bewickii population winters in the Yangtze River floodplain, China. Historically the species was more widely distributed throughout the floodplain but now most of the population is confined to five wetlands in Anhui Province and to Poyang Lake in Jiangxi Province, where the majority (up to 113,000 birds) occur. Within-winter counts suggest that swans congregate at Poyang Lake before dispersing to other sites later in the winter. Counts show large between-year fluctuations, but suggest declines at Shengjin and Fengsha Lakes (both in Anhui) during the last five years. Declines at Shengjin Lake are likely due to decreases in submerged vegetation (particularly tuber-producing Vallisneria, a major food item) perhaps linked to eutrophication. Range contractions throughout the floodplain may also be linked to reductions in submerged vegetation coverage elsewhere. Changes in water quality and lake hydrology post-Three Gorges Dam may have adversely affected submerged vegetation productivity. Key information needs for the effective implementation of conservation measures for Tundra Swans include: (1) annual surveys of all major wintering sites throughout each winter to establish the importance of different sites during the non-breeding period; (2) more information on swan diets at important sites; and (3) an assessment of adverse effects of water quality and lake water levels post-Three Gorges Dam on submerged vegetation productivity at Poyang Lake and other important sites.

Ecological footprint analysis for urban agglomeration sustainability in the middle stream of the Yangtze River

2020 ◽  
Author(s):  
Hongqi Wang
Keyword(s):  
Yangtze River ◽  
Ecological Footprint ◽  
Poyang Lake ◽  
Urban Agglomeration ◽  
The Yangtze River ◽  
Great Cost ◽  
Middle Stream ◽  
Footprint Analysis ◽  
Health And Economic Development ◽  
Ecological Footprint Analysis

<p>How to balance ecosystem health and economic development is essential to study sustainability of urban ecosystems. Many methods for assessing urban sustainability have been developed, among which ecological footprint analysis (EFA) has been widely applied as a promising policy and planning tool. This paper proposed a modified EFA with the local ecological footprint being justified by adapting equivalence and yield factors in context of net primary productivity (NPP) from the Miami model. Biodiversity reserves were also incorporated using GIS technology and synthetic assessment of attributes to reflect various eco- logical functions. In addition, ecological footprint deficit (EFD), implying that the productive land cannot sustain current levels of consumption for a given population, was used to reveal the extent of ecological debt, while the ecological footprint variation index (EFVI) was proposed to describe the tradeoffs between real consumption and the carrying capacity of a specific region. A case study of urban areas in the middle stream of the Yangtze River Basin showed that the per capita EFD of the Wanjiang urban belt, central Poyang Lake urban agglomeration, suburban Poyang Lake urban agglomeration, Wuhan megalopolis, Jingmen–Jingzhou–Yichang urban agglomeration, central Changsha–Zhuzou–Xiangtan urban agglomeration, and suburban Changsha–Zhuzou–Xiangtan urban agglomeration increased by 64.83%, 178.05%, 214.82%, 59.08%, 71.68%, 100.62%, and 91.06% between 2000 and 2010, respectively. The local ecological footprint pressure index (EFPI) was classified into five levels. The Poyang lake urban agglomeration was found to be in a slight deficit, while all others were in a severe deficit in 2010. Calculations of EFVI also revealed that the booming urbanization occurred at great cost to the deteriorating ecosystems between 2000 and 2010. Accordingly, relevant influence factors were investigated using a forward stepwise regression method, which indicated that ecological deficit was positively correlated with GDP, population density, and emission of industrial waste, but negatively correlated with the tertiary industry.</p>

scholarly journals Applying energy theory to understand the relationship between the Yangtze River and Poyang Lake

2018 ◽  
Vol 28 (8) ◽  
pp. 1059-1071 ◽  
Author(s):  
Mofei Chen ◽  
Jinyun Deng ◽  
Shaoying Fan ◽  
Yitian Li
Keyword(s):  
Yangtze River ◽  
Poyang Lake ◽  
The Yangtze River ◽  
Energy Theory ◽  
The Relationship

A Possible Connectivity among Estuarine Tapertail Anchovy (Coilia nasus) Populations in the Yangtze River, Yellow Sea, and Poyang Lake

2016 ◽  
Vol 39 (6) ◽  
pp. 1762-1768 ◽  
Author(s):  
Tao Jiang ◽  
Hongbo Liu ◽  
Mingjie Lu ◽  
Tingting Chen ◽  
Jian Yang
Keyword(s):  
Yellow Sea ◽  
Yangtze River ◽  
Poyang Lake ◽  
The Yangtze River ◽  
Coilia Nasus
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