附件
|
|
|
| |
|
|
| 本文已被：浏览 473次 下载 220次 |
|
|
|
| 极端水文事件对鄱阳湖水鸟越冬生境面积的影响 |
|
李映瑜, 何亮, 葛刚, 李述
|
|
：南昌大学鄱阳湖环境与资源利用教育部重点实验室：南昌大学资源与环境学院
|
|
| 摘要: |
| 水文过程是影响洪泛湿地水鸟栖息地适宜性和面积变化的重要因素。当前全球变暖引起的极端水文事件频发，鄱阳湖
在2020 年和2022 年分别发生了极端洪水和极端干旱，2015 年又发生了冬季洪水，但极端水文事件对鄱阳湖水鸟越冬生境面积
的影响并不清楚。本文基于2013-2023 年的卫星影像，提取了每年9 月至次年2 月的鄱阳湖越冬水鸟栖息地数据，然后通过对
比极端水文事件年份与平水年的水鸟越冬生境的时空变化，探讨了极端水文事件对鄱阳湖水鸟越冬生境面积的影响。研究发现：
1）夏季极端洪水、夏秋季极端干旱和冬季洪水导致的鄱阳湖水鸟越冬生境的面积损失分别高达67.62%、29.83%和18.18%；2）
夏季极端洪水和夏秋季极端干旱在9-11 月导致鄱阳湖水鸟越冬生境面积明显减少，但它们并未减少水鸟越冬关键期（冬季）的
生境面积，冬季洪水的影响强度虽然不及夏季极端洪水和夏秋季极端干旱，但是冬季洪水导致水鸟越冬关键期的生境面积平均
损失了14.31%；3）极端水文事件对鄱阳湖水鸟越冬生境的影响存在明显的时空差异，它与极端水文事件的过程和湖底高程有
关。本文的研究结果对鄱阳湖及其类似洪泛湿地的管理以及水鸟保护都有参考意义。 |
| 关键词: 极端水文事件 鄱阳湖 越冬水鸟 栖息地 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金 (72364023)、国家自然科学基金 (32360292)和国家自然科学基金 (32260290)联合资助。 |
|
| Impacts of extreme hydrological events on waterbirds’ wintering habitats area in Poyang Lake |
|
Li Yingyu, He Liang, Ge Gang, Li Shu
|
|
: Key Laboratory of Poyang Lake Environment and Resource Utilization,Ministry of Education,Nanchang University,Nanchang,China: School of Resources Environment Nanchang University,Nanchang,China
|
| Abstract: |
| Hydrological processes are crucial factors affecting the suitability and area changes of waterbird habitats in
floodplain wetlands. Currently, extreme hydrological events triggered by global warming have become more frequent. Poyang
Lake experienced extreme flooding in 2020 and extreme drought in 2022, and a winter flood in 2015. However, impacts of
extreme hydrological events on wintering habitat area of waterbirds in Poyang Lake remain unclear. This study extracted data on
the wintering waterbird habitats in Poyang Lake from satellite imagery between 2013 and 2023 for the period from September to
February of the following year. By comparing the spatial and temporal changes in waterbird wintering habitats between extreme
hydrological event years with normal hydrological years, the study explores the impact of extreme hydrological events on
wintering waterbird habitats area at Poyang Lake. The findings are: 1) The area loss of wintering habitats for waterbirds in Poyang Lake caused by extreme flooding in summer (EFS), extreme drought in late summer and autumn (EDSA), and winter flooding
(WF) reached as high as 67.62%, 29.83%, and 18.18%, respectively; 2) EFS and EDSA led to a significant reduction in the area
of waterbird wintering habitats from September to November, but they did not reduce the habitat area during the critical wintering
period (winter) for the waterbirds. Although the intensity of WF was not as severe as that of EFS and EDSA, WF resulted in an
average habitat area loss of 14.31% during the critical wintering period for waterbirds; 3) There are significant spatiotemporal
differences in the impact of extreme hydrological events on the waterbirds" wintering habitats in Poyang Lake, which are
related to the process of the extreme hydrological events and the lake"s elevation. The study"s results are valuable for the
management of Poyang Lake and similar floodplain wetlands, as well as for waterbird conservation. |
| Key words: Extreme hydrological events Poyang Lake wintering waterbirds habitats |
|
|
|
|
