Spatiotemporal Dynamics of Ecological Variation Affect an Endangered Migratory Bird Black-faced Spoonbill (&amp;lt;i&amp;gt;Platalea minor&amp;lt;/i&amp;gt;) in Southwestern Coast of Taiwan

Chen, Kun-Neng

doi:10.4236/oje.2014.43011

Cited by 7 publications

(1 citation statement)

References 15 publications

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“…We used ENVI 4.8 software to classify water depths and land topography from satellite images through unsupervised classification. We defined the water depth into four classes: wet ground, 0 -0.5 m, 0.5 -1.0 m, and deeper than 1.0 m [27]. Field surveys were employed to adjust and validate the classification of results.…”

Section: Bird Study Area In Cigu Salt Pan In Tainanmentioning

confidence: 99%

Water Bird Communities in Nonoperational Cigu Salt Pan Wetland of Varying Land Elevation and Water Depth on the Southwest Taiwan Coast

Chen¹,

Chyi²,

Kuo³

et al. 2020

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The Black-faced Spoonbill (Platalea minor) is a critically endangered species. More than 50% of these spoonbills winter regularly on the southwestern coast of Taiwan. From 2007 to 2019, the rate of increase of the Black-faced Spoonbill population was only 10.5%, which is lower than the rate of 12.0% per year reported between 1991 and 2004. Black-faced Spoonbills have experienced several bottlenecks, and problems may exist in their breeding and/or in wintering habitats. Understanding the ecological environment of their habitats in Taiwan is an important issue, including the current use of water birds, the water depth of their habitats and even the aquatic plants. A total population of 93,614 birds of 88 species was recorded in a survey of the Cigu salt pan from October 2017 to October 2018. The biodiversity H' (loge) of the total birds was 2.67. Dunlin (Calidris alpina) was the most dominant species with a population of 21,053 (22.5%), followed by Kentish Plover (Charadrius alexandrinus) with a population of 20,350 (21.7%). The largest area of terrain elevation at −1.0 to −0.2 m was 685.4 ha (38.5%) and at −0.2 to −0.1 m was 320.4 ha (18.0%). Between 2017 and 2018, the similarity in water depth classification was 47.2%, reflecting climate change, a degree of water accumulation, and the wader utilization situation. A strategy for maintaining biodiversity in the Cigu salt pan wetland and conserving spoonbills is therefore proposed in this paper.

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Section: Bird Study Area In Cigu Salt Pan In Tainanmentioning

confidence: 99%

Water Bird Communities in Nonoperational Cigu Salt Pan Wetland of Varying Land Elevation and Water Depth on the Southwest Taiwan Coast

Chen¹,

Chyi²,

Kuo³

et al. 2020

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Conservation-oriented management benefits the Black-faced Spoonbill, an endangered migratory waterbird

Lin,

Fuller,

Gibson

et al. 2024

Global Ecology and Conservation

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Migration routes, population status and important sites used by the globally threatened Black-faced Spoonbill (Platalea minor): a synthesis of surveys and tracking studies

Chen

Yu²,

Meng

et al. 2021

Avian Res

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Background The Black-faced Spoonbill (Platalea minor) is a globally threatened species, nesting mainly in western Korea with smaller numbers breeding in Liaoning Province, China, and Far East Russia. Recent winter field surveys to estimate the species’ population size were almost totally conducted in coastal areas, but tracking studies showed that some individuals now winter inland. To ensure its long-term survival, we need a more comprehensive assessment of the current distribution and abundance of the species. Methods We combined the most recent count data and satellite tracking information to update existing information about the population abundance and distribution of the Black-faced Spoonbill at all stages of its annual life cycle, and how these have changed during 2004–2020. Results Black-faced Spoonbills mainly breed on the west coast of the Korean peninsula, while immature birds show a wider summer distribution throughout Yellow Sea coastal areas, when a few remain on wintering sites in the south. Combined tracking results and mid-winter counts confirmed known wintering sites on the east and south coasts of China, but showed that the species also winters on wetlands in the Yangtze River floodplain and in Southeast Asia. During 2004–2020, counts of wintering birds in coastal habitats increased from 1198 to 4864, with numbers wintering on the island of Taiwan contributing most to the overall increase. Latest counts found 5222 in 2021. We also identify key wintering and stopover sites as well as their current conservation status. Conclusions This study revised the known summering and wintering ranges of the Black-faced Spoonbill and assessed the conservation status of key sites based on a combination of field survey and satellite tracking data. We recommend prioritisation of further field research to identify and survey inland wintering areas in the Yangtze River floodplain and summering areas of immature birds. More tracking of adult individuals and birds during spring migration is necessary to fill these information gaps. We also suggest establishing a Black-faced Spoonbill monitoring platform to store, share and show real-time distribution range and population abundance data.

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Spatiotemporal Dynamics of Ecological Variation Affect an Endangered Migratory Bird Black-faced Spoonbill (<i>Platalea minor</i>) in Southwestern Coast of Taiwan

Cited by 7 publications

References 15 publications

Water Bird Communities in Nonoperational Cigu Salt Pan Wetland of Varying Land Elevation and Water Depth on the Southwest Taiwan Coast

Water Bird Communities in Nonoperational Cigu Salt Pan Wetland of Varying Land Elevation and Water Depth on the Southwest Taiwan Coast

Conservation-oriented management benefits the Black-faced Spoonbill, an endangered migratory waterbird

Migration routes, population status and important sites used by the globally threatened Black-faced Spoonbill (Platalea minor): a synthesis of surveys and tracking studies

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