Exploring the Vegetation Changes in Poyang Lake Wetlands: Succession and Key Drivers over Past 30 Years
Wetland vegetation is vital for ecological purification and climate mitigation. This study analyzes the spatiotemporal characteristics and influencing factors of water areas, fractional vegetation cover (FVC), and land use types in Poyang Lake wetland across wet and dry seasons (1990–2022) using rem...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-04-01
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| Series: | Remote Sensing |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-4292/17/8/1370 |
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| Summary: | Wetland vegetation is vital for ecological purification and climate mitigation. This study analyzes the spatiotemporal characteristics and influencing factors of water areas, fractional vegetation cover (FVC), and land use types in Poyang Lake wetland across wet and dry seasons (1990–2022) using remote sensing technology. The results showed that the water area remained overall stable during the wet seasons but decreased significantly in the dry seasons (19.27 km<sup>2</sup>/a). FVC exhibited an overall increasing trend, with vegetation expanding from lake margins to central areas. The land use areas of shallow water, bare ground, and <i>Phalaris arundinacea–Polygonum hydropiper</i> (<i>P. arundinacea–P. hydropiper</i>) communities showed interannual fluctuating decreases, while other land use types areas increased. From 1990 to 2020, land use changes were mainly characterized by the transformation of shallow water into deep water and bare ground, other vegetation into <i>Carex cinerascens</i> (<i>C. cinerascens</i>) community and bare ground, bare ground into deep water, as well as <i>P. arundinacea–P. hydropiper</i> community to <i>C. cinerascens</i> community. Rising temperatures enhanced FVC in both seasons, stimulated the expansion of <i>C. cinerascens</i> community area and total vegetation area, and reduced the dry season water area. Decreasing accumulated precipitation exacerbated water area loss and the decline of <i>P. arundinacea–P. hydropiper</i> communities. These findings provide critical insights for wetland ecological conservation and sustainable management. |
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| ISSN: | 2072-4292 |