Influence of a heavy rainfall event on nutrients and phytoplankton dynamics in a well-mixed semi-enclosed bay
Influence of a heavy rainfall event on nutrients and phytoplankton dynamics in a well-mixed semi-enclosed bay
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强降雨事件对混合半封闭海湾营养物和浮游植物动态的影响
DOI：
10.1016/j.jhydrol.2022.128932
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发表时间：
2022-12
影响因子：
6.4
通讯作者：
Xianqing lv
中科院分区：
文献类型：
--
作者：
Haiwen Han;Rushui Xiao;Gu;ong Gao;Baoshu Yin;Shengkang Liang;Xianqing lv
随着气候变暖，预计未来极端降水事件将更频繁地发生，这可能导致沉积物和淡水涌入沿海沃茨，迅速影响水质。了解海岸系统如何响应和恢复，从这样的急性事件变得越来越重要，特别是在半封闭的海湾，如胶州湾（JZB）的水交换和净化能力弱。基于2012年7月17日、8月5日和8月22日进行的三次巡航，使用耦合物理-生物模型来研究JZB对台风达维（一种极端降水事件）的生态系统响应。为了研究降雨变化的机制，设置了三组敏感性试验，分别对河流和大气沉降的贡献进行了进一步分析。结果表明，台风降水为浮游植物提供了高浓度的溶解无机氮（DIN）和溶解无机磷（DIP），并导致叶绿素a含量显著增加。暴雨过程中，河流径流输入的氮、磷分别是大气沉降输入的1.80倍和2.14倍。河流输入支持的生产力是大气沉降支持的2.14倍。降雨引起的营养盐输入将导致沿海地区，特别是半封闭海湾的水华。由于降雨量增加会导致河流流量增加，河流成为营养物质的主要载体。大气沉降提供的磷供给水平较低，对缓解半封闭海湾的磷限制作用有限。加强河流和大气沉降的生态监测是预测生态系统对极端降雨事件响应的迫切和必要的。
With a warming climate, extreme precipitation events are projected to occur more frequently in future, which can lead to sediment and freshwater pulses to coastal waters that quickly affect water quality. Understanding how coastal systems respond to and recover from such acute events is becoming more and more important, particularly true in semi-enclosed bays with weak water exchange and purification capacities, such as Jiaozhou Bay (JZB). Based on the three cruises performed on 17 July, 5 and 22 August 2012, a coupled physical-biological model was used to examine ecosystem responses in JZB to Typhoon Damrey, an extreme precipitation event. In order to study the mechanism behind rainfall-induced changes, three groups of sensitivity experiments were set to furtherly analyze the contributions of rivers and atmospheric deposition, respectively. The results showed that typhoon-induced rainfall provided high concentration of dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP) to phytoplankton which caused a remarkable chlorophyll-a increase subsequently. During the heavy rainfall event, the nitrogen and phosphorus inputs from river runoff were 1.80 and 2.14 times than that from atmospheric deposition, respectively. River inputs supported 2.14 times the productivity than that supported by atmospheric deposition. Rainfall-induced nutrient input will lead to blooms in coastal areas, especially in semi-enclosed bays. Since increased rainfall would trigger higher river discharge, rivers became the main carriers of nutrients. Atmospheric deposition provided a low-level supply, and it was limited for alleviating phosphorus limitation in semi-enclosed bays. Enhancing ecological monitoring of rivers and atmospheric deposition is urgent and essential to predict the response of ecosystems to extreme rainfall events.
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影响因子：
4.5
作者：
Y. Wen;R. Peters
通讯作者：
Y. Wen;R. Peters
影响因子：
8.9
作者：
F. Dobson;Stuart D. Smith
通讯作者：
F. Dobson;Stuart D. Smith
影响因子：
1.2
作者：
G. Weyhenmeyer;E. Willén;L. Sonesten
通讯作者：
G. Weyhenmeyer;E. Willén;L. Sonesten
台风“努里”引发珠江口附近浮游植物大量繁殖
DOI：
10.1029/2009jc005384
发表时间：
2009-12
期刊：
J. Geophys. Res.
影响因子：
--
作者：
Wang,Dongxiao;Tang,Danling;Zhao, hui
通讯作者：
Zhao, hui
DOI：
--
发表时间：
1972
期刊：
--
影响因子：
--
作者：
W. Richard
通讯作者：
W. Richard