Eco-environment of wintering habitat of migratory birds in poyang lake and prediction of impacts of the theer-gorges project on it

Poyang Lake is the largest wintering habitat for migratory birds in Asia. In the last decade, the lake has experienced an early-occurring and prolonged dry season that has deteriorated the lake’s ecological status. To tackle this issue, the Chinese government has proposed the construction of the Poyang Lake Hydraulic Project (PLHP) to regulate water flow to the lake. However, its impact on migratory bird habitats is unknown. In this study, we simulated the habitat suitability for migratory birds in Poyang Lake during wet and dry years, with and without the presence/operation of the hydraulic project. A two-dimensional hydrodynamic model was used to simulate the water conditions for each case. Matter-element theory, 3S technology and ecological knowledge were combined to develop a matter-element-based habitat suitability model in a geographic information system (GIS)-based platform. We assessed and compared the habitat suitability in four scenarios: (1) Wet year without the hydraulic project, (2) wet year with the hydraulic project, (3) dry year without the hydraulic project, and (4) dry year with the hydraulic project. The results showed that the operation of the hydraulic project can effectively alleviate the water shortage issue in the wetland and increase the area of habitats suitable for migratory birds in typical dry years. However, it can reduce the area of suitable habitats in the northern provincial nature reserve of the lake. In addition, a reasonable management of the lake’s fishing activities can also increase habitat suitability and promote balanced patterns between human activities and migratory bird habitats.

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Distribution and dynamics of risk factors associated with highly pathogenic avian influenza H5N1

Epidemiology and Infection ◽

10.1017/s0950268813000101 ◽

2013 ◽

Vol 141 (11) ◽

pp. 2444-2453 ◽

Cited By ~ 2

Author(s):

L. ZHANG ◽

Z. W. GUO ◽

E. S. BRIDGE ◽

Y. M. LI ◽

X. M. XIAO

Keyword(s):

Avian Influenza ◽

Migratory Birds ◽

Highly Pathogenic Avian Influenza ◽

Poyang Lake ◽

Highly Pathogenic ◽

Factors Associated ◽

Pathogenic Avian Influenza ◽

Poyang Lake Region ◽

Lake Region ◽

Hpai H5n1

SUMMARYWithin China's Poyang Lake region, close interactions between wild migratory birds and domestic poultry are common and provide an opportunity for the transmission and subsequent outbreaks of highly pathogenic avian influenza (HPAI) virus. We overlaid a series of ecological factors associated with HPAI to map the risk of HPAI in relation to natural and anthropogenic variables, and we identified two hotspots for potential HPAI outbreaks in the Poyang Lake region as well as three corridors connecting the two hotspot areas. In hotspot I, there is potential for migratory birds to bring new avian influenza (AI) strains that can reassort with existing strains to form new AI viruses. Hotspot II features high-density poultry production where outbreaks of endemic AI viruses are likely. The three communication corridors that link the two hotspots further promote HPAI H5N1 transmission and outbreaks and lead to the persistence of AI viruses in the Poyang Lake region. We speculate that the region's unevenly distributed poultry supply-and-demand system might be a key factor inducing HPAI H5N1 transmission and outbreaks in the Poyang Lake region.

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Impacts of ecological restoration and human activities on habitat of overwintering migratory birds in the wetland of Poyang Lake, Jiangxi Province, China

Journal of Mountain Science ◽

10.1007/s11629-014-3128-8 ◽

2015 ◽

Vol 12 (5) ◽

pp. 1302-1314 ◽

Cited By ~ 6

Author(s):

Chuan-zhun Sun ◽

Lin Zhen ◽

Chao Wang ◽

Bang-you Yan ◽

Xiao-chang Cao ◽

...

Keyword(s):

Ecological Restoration ◽

Human Activities ◽

Migratory Birds ◽

Poyang Lake ◽

Jiangxi Province

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Spatiotemporal Dynamics of Water Body Changes and Their Influencing Factors in the Seasonal Lakes of the Poyang Lake Region

Water ◽

10.3390/w13111539 ◽

2021 ◽

Vol 13 (11) ◽

pp. 1539

Author(s):

Hai Liu ◽

Hongmeng Yuan ◽

Shimian Wang ◽

Liang Zheng ◽

Ming Liao

Keyword(s):

Influencing Factors ◽

Migratory Birds ◽

Poyang Lake ◽

Water Area ◽

Migratory Bird ◽

Wet Season ◽

Ecological Processes ◽

Poyang Lake Region ◽

Lake Region ◽

Main Lake

Poyang Lake is the largest freshwater lake in China, an internationally important wetland and the largest migratory bird habitat in Asia. There are numerous seasonal lakes in the Poyang Lake region, and these lakes create a complex and diverse wetland landscape and serve as the main activity area for migratory birds. Seasonal lakes have significant effects on hydrological and ecological processes and are highly susceptible to various changes, but research on seasonal lakes is relatively limited. Based on long-term remote sensing images, this study analyzed the spatiotemporal variation characteristics of seasonal lakes and their influencing factors and ecological effects. The conclusions were as follows: the average water area of seasonal lakes showed a unimodal change during the year, reaching a maximum in July and a minimum in January. The interannual water area fluctuated greatly, and the overall water area showed a small downward trend. In terms of spatial variation, the seasonal lakes were connected with the main lake in the wet season and separated from the main lake in the dry season. Among the natural factors, the influences of temperature, evaporation, and rainfall on the water area of the seasonal lakes were successively reduced. In addition, the incoming water from the Yangtze River had an important influence. Among the human factors, the traditional fishing method “enclosing sublakes in autumn” had the greatest impact on the water area in a specific period, followed by the indirect impact of the Three Gorges Project.

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A review on the driving forces of water decline and its impacts on the environment in Poyang Lake, China

Journal of Water and Climate Change ◽

10.2166/wcc.2020.216 ◽

2020 ◽

Author(s):

Qiyue Li ◽

Geying Lai ◽

Adam Thomas Devlin

Keyword(s):

Climate Change ◽

Migratory Birds ◽

Driving Forces ◽

Poyang Lake ◽

Ecological Impacts ◽

Water Levels ◽

Sand Mining ◽

Potential Threat ◽

Lake Ecosystems ◽

Natural Lakes

Abstract The recession of water levels of natural lakes and their associated impacts on wetland ecosystems is a serious issue worldwide. Poyang Lake (the largest freshwater lake in China) has experienced a heightened and prolonged water decline since the year 2000, which causes concern for associated ecological impacts. In particular, climate change, operation of the Three Gorges Dam (TGD), and high magnitude sand mining appear to be well-correlated with the occurrence of water decline in Poyang Lake. Though the above factors have been analyzed in previous studies, a comprehensive summary has never been compiled. This paper provides a detailed literary review highlighting the driving forces and possible impacts of the consistent water decline in Poyang Lake. We conclude here that the operation of TGD is a fundamental cause for the lake water decline, aggravated by climate change and sand mining. The water decline has caused a deterioration of water quality, as well as having given rise to a potential threat to the habitat of migratory birds and Yangtze finless porpoises. The paper intends to offer constructive references that can be used in decision-making for effective protection of water resources and lake ecosystems.

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Emergence and Evolution of H10 Subtype Influenza Viruses in Poultry in China

Journal of Virology ◽

10.1128/jvi.03167-14 ◽

2015 ◽

Vol 89 (7) ◽

pp. 3534-3541 ◽

Cited By ~ 42

Author(s):

Chi Ma ◽

Tommy Tsan-Yuk Lam ◽

Yujuan Chai ◽

Jia Wang ◽

Xiaohui Fan ◽

...

Keyword(s):

Migratory Birds ◽

Poyang Lake ◽

Southern China ◽

Human Infection ◽

Influenza Viruses ◽

Influenza Surveillance ◽

Domestic Ducks ◽

Live Poultry ◽

Human Infections ◽

Live Poultry Markets

ABSTRACTThe cases of human infections with H10N8 viruses identified in late 2013 and early 2014 in Jiangxi, China, have raised concerns over the origin, prevalence, and development of these viruses in this region. Our long-term influenza surveillance of poultry and migratory birds in southern China in the past 12 years showed that H10 influenza viruses have been introduced from migratory to domestic ducks over several winter seasons at sentinel duck farms at Poyang Lake, where domestic ducks share their water body with overwintering migratory birds. H10 viruses were never detected in terrestrial poultry in our survey areas until August 2013, when they were identified at live-poultry markets in Jiangxi. Since then, we have isolated 124 H10N8 or H10N6 viruses from chickens at local markets, revealing an ongoing outbreak. Phylogenetic analysis of H10 and related viruses showed that the chicken H10N8 viruses were generated through multiple reassortments between H10 and N8 viruses from domestic ducks and the enzootic chicken H9N2 viruses. These chicken reassortant viruses were highly similar to the human isolate, indicating that market chickens were the source of human infection. Recently, the H10 viruses further reassorted, apparently with H5N6 viruses, and generated an H10N6 variant. The emergence and prevalence of H10 viruses in chickens and the occurrence of human infections provide direct evidence of the threat from the current influenza ecosystem in China.IMPORTANCEAfter the outbreak of avian-origin H7N9 influenza viruses in China, fatal human infections with a novel H10N8 virus were reported. Utilizing data from 12 years of influenza surveillance in southern China, we showed that H10 viruses were regularly introduced by migratory ducks to domestic ducks on Poyang Lake, a major aggregative site of migratory birds in Asia. The H10 viruses were maintained and amplified in domestic ducks and then transmitted to chickens and reassorted with enzootic H9N2 viruses, leading to an outbreak and human infections at live-poultry markets. The emergence of the H10N8 virus, following a pathway similar to that of the recent H7N9 virus, highlights the role of domestic ducks and the current influenza ecosystem in China that facilitates influenza viruses moving from their reservoir hosts through the live-poultry system to cause severe consequences for public health.

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Perilaku Migrasi Sikep Madu-Asia dalam Pemanfaatan Lanskap di Flores Bagian Timur, Indonesia Berdasarkan Data Satellite-tracking

Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) ◽

10.29244/jpsl.10.3.479-488 ◽

2020 ◽

Vol 10 (3) ◽

pp. 479-488

Author(s):

Syartinilia ◽

Risco Noverio Rafael ◽

Hiroyoshi Higuchi

Keyword(s):

Food Supply ◽

Migratory Birds ◽

Satellite Tracking ◽

Breeding Habitat ◽

Migratory Behavior ◽

Small Islands ◽

Complex Phenomenon ◽

Stopover Site ◽

Wintering Habitat ◽

Migratory Path

Raptor migration is complex phenomenon of migration which involving of millions of individual birds flying hundreds or thousands kilometers, between breeding habitat and wintering habitat. Migratory behavior consisted of period, route, and other aspects that affect the ecology of migratory birds. Pernis ptylorhynchus, Oriental honey-buzzard (OHB) is one of migratory raptors which have satellite tracked by ARGOS since 2003. Eastern part of Flores Islands consisted of small islands (23 islands) were identified as OHB’s migratory path to reach their wintering habitats in Kupang and Timor Island. This study has aimed to identify and analyze the OHB’s migratory behavior in Eastern part of Flores Islands. Four individuals OHB have satellite tracked in the period of 2007-2012 were used as main data for analyzing their migratory behavior. There was no particular pattern found on the way of OHBs selected islands for their stopover site because of the existence of small islands cluster provide variety of route for each OHBs. The length of their stay found relatively constant every year and tend to be stay longer on larger islands than the smaller one such as Flores Island and Lembata Island. This is apparently due to the larger islands provide more food supply than smaller islands.

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