Normalized difference vegetation index dynamic and spatiotemporal distribution of migratory birds in the Poyang Lake wetland, China

Wu, Xiaoxu; Lv, Meng; Jin, Zhenyu; Michishita, Ryo; Cui, Jin; Tian, Huaiyu; Tu, Xiaobin; Zhao, Hongmei; Niu, Zhenguo; Chen, Xiaoling; Yue, Tianxiang; Xu, Bing

doi:10.1016/j.ecolind.2014.01.041

Cited by 60 publications

(36 citation statements)

References 23 publications

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“…Normalized difference vegetation indices (NDVI) were associated with abundance of herbivorous birds in Poyang Lake (Wu, Lv, et al 2014) and higher risks of HPAI outbreaks in Vietnam (Henning, Pfeiffer, and Vu 2009). HPAI H5N1 occurrences in wild birds in Europe were strongly influenced by the availability of food resources, and facilitated by increased temperature and reduced precipitation (Si et al 2010).…”

Section: Ecologymentioning

confidence: 99%

Persistence and transmission of avian influenza A (H5N1): virus movement, risk factors and pandemic potential

Tian

2015

Annals of GIS

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Repeated outbreaks in epidemic areas and invasion of new countries and regions expanded influence on poultry production, economics and the ecology of wild birds. Highly pathogenic avian influenza (HPAI) H5N1 has moved the world closer to a further global pandemic. An understanding of HPAI H5N1 transmission and persistence is therefore of significance for the prevention and control of epidemics. In this review we consider virus movement through poultry production systems (live bird markets, small holder farms and industry), wild bird migration and vector media (biological and mechanical); risk factors in poultry production systems (commercial, backyard and free-grazing farm); and the ecological environments (avian community, ecology and geographical isolation) of epidemic areas, and their effects on H5N1 virus transmission and persistence. We conclude that the pandemic potential, widespread transmission and sustained persistence of H5N1 is the result of conflicts between traditional production and consumption habits and the intense poultry production industry in Southeast Asia.

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Section: Ecologymentioning

confidence: 99%

Persistence and transmission of avian influenza A (H5N1): virus movement, risk factors and pandemic potential

Tian

2015

Annals of GIS

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“…Information on market factors, road accessibility, and environmental factors can be extracted out for preliminary screening. To identify the distribution characteristics of the migratory bird communities, an annual cross-sectional survey was carried out by the Forestry Administration of Jiangxi Province using airplanes together with ground teams working from December to January between 1999 and 2009 in the entire wetland of the Poyang lake region (Ji et al 2007;Wu et al 2014). Most of our sampling locations are close to the surveyed areas (including 44 smaller lakes).…”

Section: Environmental Datamentioning

confidence: 99%

“…The Poyang lake area, where the wetlands are widely distributed, has the largest freshwater lake in China and is an ideal overwintering site for more than 520,000 migratory birds annually (Ji et al 2007;Wu et al 2014). This area also has an intensive poultry industry (Cappelle et al 2014;Wang et al 2013), which is the most important industry and main source of livelihood for local residents (Wang et al 2013) and the scale of industry in the Poyang lake area is estimated at more than 40 million poultry in stock from the statistics yearbook.…”

Section: Introductionmentioning

confidence: 99%

Risk analysis of H5N1 highly pathogenic avian influenza in poultry at the Poyang Lake area, China

Huang

Tian

et al. 2016

Environ Earth Sci

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Migratory birds have been known to spread the highly pathogenic avian influenza virus (HPAIV) H5N1 over large distances. Moreover, previous studies have shown it to be widely circulated in live-bird markets. However, how live-bird markets in addition to wild birds affect the local persistence of avian influenza virus (AIV) remains uncertain. The abundance of fresh water and widely distributed wetlands make the Poyang lake area a suitable overwintering site for migratory birds. The intensive local poultry industry and poor biosecurity potentially increase the risk of interactions between the wild and domestic birds. These factors likely contributed to the spread and persistence of AIVs in the Poyang lake area in these years. Here, a cross-sectional survey together with sampling was conducted randomly in the Poyang lake area to investigate the local distribution of the H5N1 viruses. In total, 891 poultry isolates from 31 villages around the Poyang lake area were randomly sampled in poultry sectors and tested for the presence of avian influenza using RT-PCR assays. Environmental factors such as poultry density, road accessibility, and wild bird biodiversity together with breeding characteristics derived from these questionnaires were collected and utilized for risk analysis modelling. Our results revealed that distance to the nearest wetlands with a high number of birds and accessibility by road were the main risk factors for the occurrence HPAIV H5N1, suggesting that the high density of road networks may facilitate the transmission of this virus. Investigating the regional distribution characteristics of the virus is of great significance, therefore the general public would benefit from an early warning, prevention, and taking control measures in high-risk regions.

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“…These relationships may be attributed to potential correlations between NDVI and plant density, biomass and foliar nutrient content [79,80], which play important role in habitat quality [53,62]. At Poyang Lake, green sedges provide a critical food resource to Anatidae of the grass-eating guild, which forage in large numbers [12,45,49,53,60] and contribute to both bird diversity and abundance at sub-lakes with this vegetation type.…”

Section: Remotely Sensed Indicators Of Poyang Lake Bird Diversity Andmentioning

confidence: 99%

“…Six major foraging guilds were defined among them based on the long-term Poyang Lake ecological research by the International Crane Foundation [40,45] and other studies in this region [7,8,43,44,53,59,61,62] and other wetlands [63]: (1) tuber feeding; (2) sedge/grass eating; (3) seed eating/dabbling; (4) benthic insect/larvae eating; (5) fish eating; and (6) zooplankton eating. Four size groups were also designated: (1) larger floating birds; (2) smaller floating birds; (3) large waders; and (4) small shorebirds.…”

Section: Waterbird Survey Of 2006 and Dependent Variablesmentioning

confidence: 99%

Landscape-Level Associations of Wintering Waterbird Diversity and Abundance from Remotely Sensed Wetland Characteristics of Poyang Lake

et al. 2016

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Poyang Lake, the largest freshwater wetland in China, provides critical habitat for wintering waterbirds from the East Asian Flyway; however, landscape drivers of non-uniform bird diversity and abundance are not yet well understood. Using a winter 2006 waterbird survey, we examined the relationships among metrics of bird community diversity and abundance and landscape characteristics of 51 wetland sub-lakes derived by an object-based classification of Landsat satellite data. Relative importance of predictors and their sets was assessed using information-theoretic model selection and the Akaike Information Criterion. Ordinary least squares regression models were diagnosed and corrected for spatial autocorrelation using spatial autoregressive lag and error models. The strongest and most consistent landscape predictors included Normalized Difference Vegetation Index for mudflat (negative effect) and emergent grassland (positive effect), total sub-lake area (positive effect), and proportion of submerged vegetation (negative effect). Significant spatial autocorrelation in linear regression was associated with local clustering of response and predictor variables, and should be further explored for selection of wetland sampling units and management of protected areas. Overall, results corroborate the utility of remote sensing to elucidate potential indicators of waterbird diversity that complement logistically challenging ground observations and offer new hypotheses on factors underlying community distributions.

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Normalized difference vegetation index dynamic and spatiotemporal distribution of migratory birds in the Poyang Lake wetland, China

Cited by 60 publications

References 23 publications

Persistence and transmission of avian influenza A (H5N1): virus movement, risk factors and pandemic potential

Persistence and transmission of avian influenza A (H5N1): virus movement, risk factors and pandemic potential

Risk analysis of H5N1 highly pathogenic avian influenza in poultry at the Poyang Lake area, China

Landscape-Level Associations of Wintering Waterbird Diversity and Abundance from Remotely Sensed Wetland Characteristics of Poyang Lake

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