Quantifying the impact of drought on net primary productivity of different vegetations in a typical large lake floodplain wetland, China
Wetland ecosystems are essential components of the global carbon and water cycles, but frequent and severe droughts pose significant disruptions to these ecosystems. As one of the most important Ramsar Wetlands globally, the Poyang Lake floodplain wetland ecosystem is facing severe drought challenge...
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Elsevier
2025-12-01
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| Series: | Ecological Informatics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1574954125002778 |
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| author | Canyu Yuan Xianghu Li Dan Zhang Xuchun Ye Tong Sun Yaling Lin Zhiqiang Tan |
| author_facet | Canyu Yuan Xianghu Li Dan Zhang Xuchun Ye Tong Sun Yaling Lin Zhiqiang Tan |
| author_sort | Canyu Yuan |
| collection | DOAJ |
| description | Wetland ecosystems are essential components of the global carbon and water cycles, but frequent and severe droughts pose significant disruptions to these ecosystems. As one of the most important Ramsar Wetlands globally, the Poyang Lake floodplain wetland ecosystem is facing severe drought challenges due to the combined impacts of climate change and human activities. This study investigated the spatio-temporal dynamics of net primary productivity (NPP) and its responses to drought in the Poyang Lake wetland from 1986 to 2020, using a process-based ecological model integrated with refined wetland vegetation classification datasets. The results indicated that the intra-annual NPP for most vegetation types exhibited two peaks, and the annual NPP ranged from 222.7 to 736.3 gC/m2/yr. Spatially, the high annual NPP values occurred in the southern and western regions of the wetland, while low values were found in the northern and eastern regions. Over the past 35 years, annual NPP decreased with the slope − 10.4 gC/m2/yr2 across the entire wetland, with the most significant decline observed in the eastern region. Drought significantly altered NPP variability in the Poyang Lake wetland. Seasonal NPP slightly increased in spring and winter but decreased in summer and autumn during dry years. Specifically, the NPP declined by 57.2 % in the summer of dry years compared to that of normal years, causing annual NPP to decrease from 467.4 gC/m2/yr in normal years to 389.6 gC/m2/yr in dry years. Notably, the seasonal NPP of dominant communities, i.e., Phragmites australis-Triarrhena lutarioriparia, and Carex cinerascens, decreased by 77.8 and 114.5 gC/m2/yr in the summer of extreme drought and mild drought years, respectively, compared to normal years. The findings of this study contribute to understanding the response mechanisms of floodplain wetland vegetation to intensified droughts and accurately assessing regional carbon budgets. |
| format | Article |
| id | doaj-art-51a48bb4d94e456a94d7ec14b13764b4 |
| institution | Kabale University |
| issn | 1574-9541 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Informatics |
| spelling | doaj-art-51a48bb4d94e456a94d7ec14b13764b42025-08-20T05:05:27ZengElsevierEcological Informatics1574-95412025-12-019010326810.1016/j.ecoinf.2025.103268Quantifying the impact of drought on net primary productivity of different vegetations in a typical large lake floodplain wetland, ChinaCanyu Yuan0Xianghu Li1Dan Zhang2Xuchun Ye3Tong Sun4Yaling Lin5Zhiqiang Tan6State Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 211135, China; University of Chinese Academy of Sciences, Beijing 101408, ChinaState Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 211135, China; Poyang Lake Wetland Observation and Research Station, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Jiujiang 332899, China; Corresponding author at: Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 299 Chuangzhan Road, Nanjing 211135, China.State Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 211135, China; Poyang Lake Wetland Observation and Research Station, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Jiujiang 332899, ChinaSchool of Geographical Sciences, Southwest University, Chongqing 400715, ChinaState Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 211135, China; University of Chinese Academy of Sciences, Beijing 101408, ChinaState Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 211135, China; University of Chinese Academy of Sciences, Beijing 101408, ChinaState Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 211135, China; Poyang Lake Wetland Observation and Research Station, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Jiujiang 332899, ChinaWetland ecosystems are essential components of the global carbon and water cycles, but frequent and severe droughts pose significant disruptions to these ecosystems. As one of the most important Ramsar Wetlands globally, the Poyang Lake floodplain wetland ecosystem is facing severe drought challenges due to the combined impacts of climate change and human activities. This study investigated the spatio-temporal dynamics of net primary productivity (NPP) and its responses to drought in the Poyang Lake wetland from 1986 to 2020, using a process-based ecological model integrated with refined wetland vegetation classification datasets. The results indicated that the intra-annual NPP for most vegetation types exhibited two peaks, and the annual NPP ranged from 222.7 to 736.3 gC/m2/yr. Spatially, the high annual NPP values occurred in the southern and western regions of the wetland, while low values were found in the northern and eastern regions. Over the past 35 years, annual NPP decreased with the slope − 10.4 gC/m2/yr2 across the entire wetland, with the most significant decline observed in the eastern region. Drought significantly altered NPP variability in the Poyang Lake wetland. Seasonal NPP slightly increased in spring and winter but decreased in summer and autumn during dry years. Specifically, the NPP declined by 57.2 % in the summer of dry years compared to that of normal years, causing annual NPP to decrease from 467.4 gC/m2/yr in normal years to 389.6 gC/m2/yr in dry years. Notably, the seasonal NPP of dominant communities, i.e., Phragmites australis-Triarrhena lutarioriparia, and Carex cinerascens, decreased by 77.8 and 114.5 gC/m2/yr in the summer of extreme drought and mild drought years, respectively, compared to normal years. The findings of this study contribute to understanding the response mechanisms of floodplain wetland vegetation to intensified droughts and accurately assessing regional carbon budgets.http://www.sciencedirect.com/science/article/pii/S1574954125002778Net primary productivityDroughtRemote sensingWetland vegetationSpatio-temporal patternLake floodplain wetland |
| spellingShingle | Canyu Yuan Xianghu Li Dan Zhang Xuchun Ye Tong Sun Yaling Lin Zhiqiang Tan Quantifying the impact of drought on net primary productivity of different vegetations in a typical large lake floodplain wetland, China Ecological Informatics Net primary productivity Drought Remote sensing Wetland vegetation Spatio-temporal pattern Lake floodplain wetland |
| title | Quantifying the impact of drought on net primary productivity of different vegetations in a typical large lake floodplain wetland, China |
| title_full | Quantifying the impact of drought on net primary productivity of different vegetations in a typical large lake floodplain wetland, China |
| title_fullStr | Quantifying the impact of drought on net primary productivity of different vegetations in a typical large lake floodplain wetland, China |
| title_full_unstemmed | Quantifying the impact of drought on net primary productivity of different vegetations in a typical large lake floodplain wetland, China |
| title_short | Quantifying the impact of drought on net primary productivity of different vegetations in a typical large lake floodplain wetland, China |
| title_sort | quantifying the impact of drought on net primary productivity of different vegetations in a typical large lake floodplain wetland china |
| topic | Net primary productivity Drought Remote sensing Wetland vegetation Spatio-temporal pattern Lake floodplain wetland |
| url | http://www.sciencedirect.com/science/article/pii/S1574954125002778 |
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