Waterbird Composition and Changes With Wetland Park Construction at Lake Dianchi, Yunnan–Guizhou Plateau

Wang, Rongxing; Yang, Xuefei

doi:10.1659/mrd-journal-d-19-00055.1

Cited by 8 publications

(9 citation statements)

References 23 publications

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“…Most habitats showed no risk (HI < 1), but Dianchi Lake showed low risk (1 < HQ < 2) of Pb and Hg for the Black-necked Crane (1 < HI < 2) (Figures and S13). Lake ecosystems are fragile and vulnerable to disturbance from human activities. , Dianchi Lake is located in the Yunnan–Guizhou Plateau, home to 40.38% of China’s wetland birds, and should be given high priority in bird biodiversity conservation efforts. , Overall, high priority should be given to the conservation of piscivorous and omnivorous wetland birds inhabiting the estuary environment, especially shorebirds along the Chinese coast, in view of pollutant exposure risks. The inland waters such as the Songhua River and Dianchi Lake are also hotspots of pollution, which act as considerable threats for threatened birds such as storks and cranes.…”

Section: Resultsmentioning

confidence: 99%

“…Lake ecosystems are fragile and vulnerable to disturbance from human activities. 110,111 Dianchi Lake is located in the Yunnan−Guizhou Plateau, home to 40.38% of China's wetland birds, and should be given high priority in bird biodiversity conservation efforts. 2,110 Overall, high priority should be given to the conservation of piscivorous and omnivorous wetland birds inhabiting the estuary environment, especially shorebirds along the Chinese coast, in view of pollutant exposure risks.…”

Section: Pollutantmentioning

confidence: 99%

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Pollutant Exposure for Chinese Wetland Birds: Ecotoxicological Endpoints and Biovectors

Cao,

Zheng,

Bai

et al. 2024

ACS EST Water

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Levels of heavy metals and organic contaminants in main waters from China were reviewed from literature data to assess the ecological risks of pollutants for wetland birds and the biotransport of pollutants mediated by migratory wetland birds. Cr, Cu, and Pb and polycyclic aromatic hydrocarbons (PAHs) dominated in sediments, with higher concentrations in rivers and estuaries than in lakes and seas. Plants are the main dietary sources of less hydrophobic organic pollutants, while sediment is the primary source of more hydrophobic PAHs in birds. The hazard index (HI) for birds was mainly contributed by mercury (Hg) and polybrominated diphenyl ethers (PBDEs) and ranked as piscivore > omnivore > herbivore. Pollutant exposure risks to birds depend on the biomagnification potential of pollutants, food items of birds, and pollution levels in habitats. Migratory birds are important biovectors of persistent and bioaccumulative pollutants that may serve as a vital geochemical cycling process in addition to atmospheric deposition. This study provided a comprehensive overview of water environment pollution in China and the potential risks for high trophic level wetland birds in aquatic ecosystems. The results also identified the pollution hotspots of wetland birds and habitats, which provide new insights into bird conservation and biodiversity protection.

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Section: Resultsmentioning

confidence: 99%

Section: Pollutantmentioning

confidence: 99%

Pollutant Exposure for Chinese Wetland Birds: Ecotoxicological Endpoints and Biovectors

Cao,

Zheng,

Bai

et al. 2024

ACS EST Water

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“…In the migratory pathway of migratory birds in the Hengduan Mountain system, a series of wetlands are given different ecological functions, and with the elevation, the ecological functions of the lakes in the Hengduan Plateau supporting the life history of migratory waterbirds are gradually transformed about three levels; the first level of Qionghai, Chenghai, Erhai, and Jianhu at an elevation of 1500–2200 m is the most important ecological function of providing important wintering grounds for wintering waterbirds (especially geese and ducks) [ 20 , 21 , 22 , 23 ]. The second layer of Lashihai, Lugu Lake, and Napa Sea at 2400–3300 m above sea level are not only wintering wetlands for migratory birds but also important stopover sites [ 24 , 25 , 26 ].…”

Section: Discussionmentioning

confidence: 99%

“…A review of the literature shows that the ecological function of the highland lakes in the Hengduan Mountains in supporting the life histories of migrating waterbirds is gradually transforming as the altitude rises. Qionghai, Chenghai, Erhai, and Jianhu are distributed at an altitude of 1500–2200 m, and the most important ecological function of these lakes is to provide wintering grounds for migratory birds from Central Asia–India [ 20 , 21 , 22 , 23 ]. Lashihai, Lugu Lake, and Napa Sea, which are all 2400–3300 m above sea level, are not only wintering wetlands for migratory birds but also important stopover sites [ 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Mangcuo Lake in Hengduan Mountains: An Important Alpine Breeding and Stopover Site along Central Asian Flyway

Wang

Yang

Song

et al. 2023

Animals

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The stopovers provide food and habitat for migratory birds and therefore play an important role in facilitating the birds’ completion of their migration. The Hengduan Mountains, which have a complex topography, are located in a large corridor of the Central Asian migratory flyway, so the lakes along the Hengduan Mountains are important for waterbird migration. The existing research on lakes in the Hengduan Mountain area is mostly concentrated in the central and southern parts of the mountains, which proves that many lakes are wintering grounds for migrating birds. We wonder whether the ecological functions of lakes will change more with further elevation. With this question, we conducted four surveys for the seasonal bird survey in Mangcuo Lake, which is located in the northwest of the Hengduan Mountains, in Markam County of Qamdo City, between October 2019 and July 2020. We recorded a total of 6109 birds from 20 species of waterbirds, including 20 species of migratory waterbirds, accounting for 100% of all bird species. The diversity and richness of waterbirds in Mangtso Lake is shown as spring > autumn ≥, summer > winter, with no waterbirds in winter. The black-necked grebe (Podiceps nigricollis), great crested grebe (Podiceps cristatus), bar-headed goose (Anser indicus), and ruddy shelduck (Tadorna ferruginea) were the dominant species in the waterbird community. The highest number of waterbird species and total individuals were found in the transition zone between the marsh wetlands and lakes, and the number of waterbird species differed significantly among habitats (X2 = 14.405, p = 0.000), with habitat complexity being an important factor influencing waterfowl abundance and distribution. The IUCN Red-listed species recorded include the black-necked crane (Grus nigricollis), painted stork (Mycteria leucocephala), and common pochard (Aythya ferina). By comparing with other lakes in Hengduan Mountain, we found that the ecological functions of the plateau lakes in the Hengduan Mountains, to support the life histories of migrating waterbirds, are gradually transforming as the altitude rises, and can be divided into approximately three levels, with the first level of Qionghai, Chenghai, Erhai, and Jianhu at altitudes of 1500–2200 m being the most important ecological function in terms of providing wintering grounds for migrating birds. The second layer, at an altitude of 2400–3300 m, includes Lashihai, Lugu Lake, and Napahai, which are not only wintering wetlands for migratory birds but also important stopover sites. The third layer of Mangcuo Lake, which is above 4000 m above sea level, provides a breeding ground for some migratory waterbirds in summer and a migratory resting place for migratory waterbirds in spring and autumn. We advocate for the importance of Mangcuo Lake in the alpine region along the central Asian flyway, as well as emerging nature conservation action that was previously neglected.

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“…It is generally accepted that in long-term, low-resolution sequences (centennial and millennial scales), coarse grain size indicates low lake water levels, reflecting an arid climate, while fine grain size indicates high lake water levels, reflecting a wet climate (Xiao et al, 2009; Fan et al, 2021). In contrast, the available interpretations for short-term, high-resolution (interannual, decadal) series are that coarse grain size indicates more precipitation and a wetter climate, and that fine grain size indicates less precipitation and a dryer climate (Liu et al, 2003; Zhang et al, 2003; Chen et al, 2004; Wang et al, 2011; Li et al, 2014). However, the climatic significance of coarse and fine grain sizes varies depending on the lake area, topography, watershed vegetation cover, and other influencing factors.…”

Section: Discussionmentioning

confidence: 99%

Changes in the lake-grassland ecosystem revealed by multiple proxies in a sediment core from Ganggeng Nur Lake, northern China

Zhang²,

et al. 2023

Quat. res.

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As the main global terrestrial ecosystem component, grasslands are extremely sensitive to global climate change. With increasing human activities over the last century, grassland ecosystems have been degraded to different degrees. However, the evolution of lake-grassland ecosystems in recent centuries remains unclear due to the dearth of high-resolution records. Here, we present high-resolution lacustrine sediment grain size, pollen (Artemisia, Myriophyllum), Pediastrum, and n-alkane records from Ganggeng Nur Lake to investigate vegetation, lake evolution, and human effects in semiarid northern China. Four stages were identified from the last ca. 150 years: (1) the natural evolution stage (AD 1870–1945), in which there was a wet climate around Ganggeng Nur and the lake level rose from increased runoff; (2) the human disturbance stage (AD 1945–1967), in which the regional climate got drier and human activities began having a detectable effect on the grassland ecosystem; (3) the human transformation stage (AD 1967–2005), in which a completely arid climate coupled with the implementation of a series of land reclamation policies resulted in a large reduction in grassland areas, extensive soil erosion, exacerbated climate change, and shrinking lake areas; and (4) the posttreatment stage (AD 2005–2018), in which soil erosion was alleviated by policy implementation and a favorable humid climate.

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Waterbird Composition and Changes With Wetland Park Construction at Lake Dianchi, Yunnan–Guizhou Plateau

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 8 publications

References 23 publications

Pollutant Exposure for Chinese Wetland Birds: Ecotoxicological Endpoints and Biovectors

Pollutant Exposure for Chinese Wetland Birds: Ecotoxicological Endpoints and Biovectors

Mangcuo Lake in Hengduan Mountains: An Important Alpine Breeding and Stopover Site along Central Asian Flyway

Changes in the lake-grassland ecosystem revealed by multiple proxies in a sediment core from Ganggeng Nur Lake, northern China

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