Drought-induced changes in hydrological and phenological interactions modulate waterbird habitats dynamics

Journal of Hydrology, Год журнала: 2023, Номер 626, С. 130228 - 130228

Опубликована: Сен. 25, 2023

Язык: Английский

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Assessment of Waterbird Habitat Importance and Identification of Conservation Gaps in Anhui Province

Animals, Год журнала: 2024, Номер 14(7), С. 1004 - 1004

Опубликована: Март 25, 2024

Wetlands are among the most important habitats of highly wetland-dependent waterbirds but subject to ongoing habitat loss and degradation owing intensified anthropogenic activities. The scarcity human natural resources makes effective protection an concern. Here, we aimed investigate waterbird methods for Anhui Province, China, a critical stopover wintering area on East Asian-Australasian Flyway that features rich wetland significant degradation. We evaluated status importance 306 identified key environmental influences current gaps using entropy weights method generalized additive modeling. found 73 in which were classified into levels (descending from I V) according discontinuity method. Level II mainly located Yangtze River floodplain IV Huaihe floodplain. gap analysis showed 42 had gaps, accounting 57.53% total area. Waterbird was significantly correlated with elevation, normalized vegetation index, lake area, circumference not distance roads or population density. results this study provide scientific information conservation planning, is crucial maintaining ecosystem functions.

Язык: Английский

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Effects of constant high water levels in winter on waterbird diversity in Caizi Lakes: A functional perspective

Global Ecology and Conservation, Год журнала: 2024, Номер 52, С. e02934 - e02934

Опубликована: Апрель 9, 2024

The middle and lower Yangtze River floodplain lakes are important stopover wintering sites for migratory birds on the East Asian–Australasian Flyway. periodic water level fluctuation of plays a critical role in aggregation waterbirds. However, construction series gates dams has impeded hydrological connectivity between rivers disrupted natural patterns lakes. status influences determines their habitat utilization by In recent years, Caizi Lakes, gate-controlled lake connected to due need regulation requirements, experienced sustained high levels winter, which can reduce quality turn influence waterbirds activity. present study, Lakes were surveyed during 2021–2022 (W1) 2022–2023 (W2) periods. Moreover, we explored effects constant winter waterbird assemblages comparing species richness, abundance, functional diversity. Correlation analyses then performed elucidate relationship factors changes period various under different conditions. results showed that beta diversity was more sensitive than alpha mid-wintering decreased suitable habitats waterbirds, increased turnover among assemblages, total dissimilarity significantly, nestedness significantly. Additionally, areas three wetland significantly correlated with W1 relatively less affected conditions W2. area influenced primarily anthropogenic activities, an increase meadow favorable assemblage richness as well functionally nested components. Water should take into consideration rhythms declining ensure adequate provided

Язык: Английский

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Effects of high water levels on waterbird diversity at Wuchang Lake, a gate-controlled lake in the middle and lower Yangtze River floodplain, China

Journal for Nature Conservation, Год журнала: 2025, Номер unknown, С. 126826 - 126826

Опубликована: Янв. 1, 2025

Язык: Английский

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Assessment of the Impact of Extreme Hydrological Conditions on Migratory Bird Habitats of the Largest Freshwater Lake Wetlands in China Based on Multi-Source Remote Sensing Fusion Approach

Sustainability, Год журнала: 2025, Номер 17(5), С. 1900 - 1900

Опубликована: Фев. 24, 2025

Poyang Lake, the largest freshwater lake of China, serves as a crucial wintering site for migratory birds in East Asian–Australasian Flyway, where habitat quality is essential maintaining diverse bird populations. Recently, frequent alternation extreme wet years, e.g., 2020, and dry 2022, have inflicted considerable perturbation on local wetland ecology, severely impacting avian habitats. This study employed spatiotemporal fusion method (ESTARFM) to obtain continuous imagery Lake National Nature Reserve during seasons from 2020 2022. Habitat areas were identified based classification water depth constraints. The results indicate that both conditions exacerbated fragmentation shallow habitats showed minor short-term fluctuations response levels but more significantly affected by long-term hydrological trends. These exhibited interannual variability across different affecting their proportion within overall distribution area. demonstrates ability ESTARFM reveal dynamic changes responses conditions, highlighting critical role analysis. outcomes this improve understanding impact habitats, which may help expand knowledge about protection other floodplain wetlands around world.

Язык: Английский

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eDNA enhances detection efficiency but reveals lower waterbird diversity: A comparison with point counting method

Avian Research, Год журнала: 2025, Номер unknown, С. 100236 - 100236

Опубликована: Март 1, 2025

Язык: Английский

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Climate Change Impacts on Flood Pulse Characteristics in the Barotse Floodplain, Zambia

Earth s Future, Год журнала: 2025, Номер 13(3)

Опубликована: Март 1, 2025

Abstract Tens of millions livelihoods depend on floodplains, making them especially vulnerable to climate change. However, understanding how annual floods may change and impact local vulnerabilities remains limited. Daily precipitation temperature projections were obtained from five CMIP6 (Coupled Model Intercomparison Project) General Circulation Models in the Inter‐Sectoral Inter‐Comparison Project (ISIMIP). These input into a coupled hydrological‐hydraulic model Barotse Floodplain, Zambia obtain data flood pulse timing, duration, magnitude. Future decades (2030s, 2050s, 2070s) under three Shared Socio‐Economic Pathways (SSPs 1–2.6, 3–7.0, 5–8.5) compared with baseline 1990s 2000s assess Climatic indices also correlated characteristics whether driver changes could be determined. floodwaves showed reduced durations magnitudes, altered timings rise recession periods. differences significant mid‐to far‐future. Large areas floodplain experience 1‐to‐2 month reductions inundation some experienced no hydrological year for first time. The northern western escarpment, Luena Valley exhibit greatest sensitivity future changes. Floodplain will become increasingly arid all scenarios, exacerbating existing challenges transhumance communities dependent floods, who face periodic food insecurity, malnutrition, limited healthcare access. Intensified drought conditions undermine resilience livelihoods, reflecting broader faced by floodplain‐dependent globally.

Язык: Английский

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Functional diversity dynamics of waterbird communities driven by water levels at Shengjin Lake, a small river‐connected shallow lake in the middle and lower Yangtze River floodplain

Ecology and Evolution, Год журнала: 2024, Номер 14(10)

Опубликована: Окт. 1, 2024

Abstract Gate‐controlled activities in lakes can directly or indirectly influence the assembly of waterbird communities. Shengjin Lake, a Ramsar site, is typical river‐connected and gate‐controlled shallow lake lower middle Yangtze River floodplain China, comprising three sub‐lakes (upper, middle, lower) based on topographical features. We surveyed wintering waterbirds at Lake from October 2022 to March 2023. divided winter water level period into nine phases characteristics changes. By measuring functional diversity, we aimed provide insights differences communities among under different conditions. Multiple linear regression was used analyze relationship between habitat factors diversity. further explored specific traits through combination R‐mode linked Q‐mode trait‐environment correlation matrix (fourth‐corner analyses) explain mechanism underlying community assembly. When fluctuated range 10.43–10.74 m (Huanghai elevation), had significant high heterogeneity, increasing richness dispersion upper lakes, both which significantly differed those lake. Habitat heterogeneity mudflat habitats have positive effects The difference diversity primarily determined foraging strata waterbirds. filtering particular major driving force Overall, suggest that minimum should be regulated 10.43 10.74 m. These findings reasonable suggestions for regulation theoretical basis conserving Lake.

Язык: Английский

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Impacts of reclamation and aquaculture on the wintering waterbird assemblage at a floodplain lakeshore based on multidimensional diversity

Global Ecology and Conservation, Год журнала: 2024, Номер 51, С. e02926 - e02926

Опубликована: Апрель 1, 2024

The floodplain lakeshores have pronounced hydrological and topographical gradients, high habitat heterogeneity, abundant food sources, providing suitable habitats for wintering stopping waterbirds. However, certain areas are experiencing ecosystem changes along the lakeshore due to lake development. Huayanghe lakes composed of several shallow lakes, located in middle lower Yangtze River floodplain, which important wetlands waterbirds on East Asian–Australasian Flyway. In recent decades, intensive reclamation aquaculture transformed into an characterized by three distinct wetland types: fishponds, paddy fields. Changes considerable impacts biodiversity, with exhibiting particularly sensitivity wetlands. Therefore, support waterbird community conservation, consequences anthropogenic activities diversity must be elucidated. Integrated studies taxonomic, phylogenetic, functional dissimilarity can provide a multifaceted indication assemblage patterns dynamics communities under disturbance. Accordingly, current study, we examined lake, fishpond, field during periods. taxonomic was significantly fishponds fields than lakes. Phylogenetic also lakes; however no significant differences were observed between community's dissimilarities fishponds. temporal varied significantly, larger fluctuations Specifically, exhibited initial increase subsequent decrease, while showed continuous, gradually declining trend. During early period, higher Additionally, increased period. summary, artificial temporary waterbirds; however, has reduced capacity maintain diversity. These findings critical insights inform design effective management strategies

Язык: Английский

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Threshold responses and relationships between waterbird distribution and habitat factors at shengjin lake, china

Journal for Nature Conservation, Год журнала: 2024, Номер 81, С. 126695 - 126695

Опубликована: Июль 27, 2024

Язык: Английский

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