全球范围内,人为干扰和气候变化导致湖泊生态系统中沉水植物的迅速减少。:crispus),一个在冬天发芽的物种,在许多中国湖泊中爆炸性地扩张,然而潜在的机制仍不清楚.这里,本研究结合1984年至2022年的遥感图像和水文气象数据以及2009年至2022年的水质数据,研究了高邮湖中P.crispus分布格局的长期变化。旨在阐明P.crispus的分布格局与水文气象和水质因素之间的关系。结果表明,高邮湖中的鳞茎面积从1984年到2009年呈小幅增长,从2010年到2019年呈明显增长,2020年后呈下降趋势。空间上,P.crispus主要分布在高邮湖的西部和北部,在湖的中部和东南部分布较少。风速(WS),温度(Temp),水位(WL),氨氮(NH3-N),和Secchi深度(SD)被确定为调节高邮湖P.crispus面积变化的关键因素。我们发现,随着温度的升高,P.crispus面积呈增加趋势,WL,和SD并降低WS和NH3-N。不同季节环境因子对高邮湖鱼面积的影响不同。结果表明,水文气象(WS,温度,和WL)可能会取代水质(NH3-N和SD),以驱动连续的P.crispus分布。这项研究的结果为最近在中国东部浅水湖泊中P的广泛扩张提供了有价值的见解。
Globally, anthropogenic disturbance and climate change caused a rapid decline of submerged macrophytes in lake ecosystems. Potamogeton crispus (P. crispus), a species that germinates in winter, explosively expanded throughout many Chinese lakes, yet the underlying mechanism remained unclear. Here, this study examined the long-term changes in the distribution patterns of P. crispus in Lake Gaoyou by combining remote sensing images and hydrometeorological data from 1984 to 2022 and water quality data from 2009 to 2022. It aims to unravel the relationships between the distribution patterns of P. crispus and hydrometeorological and water quality factors. The results showed that the area of P. crispus in Lake Gaoyou showed a slight increase from 1984 to 2009, a marked increase from 2010 to 2019, followed by a decline after 2020. Spatially, P. crispus was primarily distributed in the western and northern parts of Lake Gaoyou, with less distribution in the central and southeastern parts of the lake. Wind speed (WS), temperature (Temp), water level (WL), ammonia nitrogen (NH3-N), and Secchi depth (SD) were identified as the key factors regulating the variation in the P. crispus area in Lake Gaoyou. We found that the P. crispus area showed an increasing trend with increasing Temp, WL, and SD and decreasing WS and NH3-N. The influence of environmental factors on the area of P. crispus in Lake Gaoyou varied among seasons. The results indicated that hydrometeorology (WS, Temp, and WL) may override water quality (NH3-N and SD) in driving the succession of P. crispus distribution. The findings of this study offer valuable insights into the recent widespread expansion of P. crispus in shallow lakes across Eastern China.