Modelling the transport of sloughed cladophora in the nearshore zone of Lake Michigan
Modelling the transport of sloughed cladophora in the nearshore zone of Lake Michigan
复制标题
模拟密歇根湖近岸区域脱落的刚毛虫的运输
DOI：
10.1016/j.jenvman.2022.116203
复制
发表时间：
2022
影响因子：
8.7
通讯作者：
Lafrancois, Brenda Moraska
中科院分区：
文献类型：
--
作者：
Shen, Chunqi;Liao, Qian;Bootsma, Harvey A.;Lafrancois, Brenda Moraska
过去几十年来，德莱森贻贝的入侵深刻地改变了五大湖的底栖物理环境和全湖养分循环。丝状绿藻刚毛藻的复苏似乎是这次入侵的后果之一。脱落的刚毛藻会恶化水质，污染休闲海滩，并可能导致禽类肉毒杆菌中毒的爆发，这种情况在密歇根湖的睡熊沙丘国家湖岸 (SLBE) 地区尤为严重。为了帮助确定脱落的毛毛虫的命运，开发了拉格朗日粒子轨迹模型，以基于物理传输混合模型来跟踪近岸区域毛毛虫碎片的传输。模型结果表明，SLBE区域内脱落的刚毛藻的主要沉积位点是距其初始生长区域不远的中深度位点。由于近岸水域藻类产量高以及内湾和外湾之间的交换有限，普拉特湾的海岸线海滩似乎特别容易受到污垢的影响，其累积颗粒数量是睡熊湾和好港湾沿岸海滩的三倍。该模型的结果可用于指导区域环境管理举措，并提供对禽类肉毒杆菌中毒爆发机制的见解。该模型还可以为解释近岸与近岸相互作用的全湖生态系统模型的开发提供信息。
The invasion of dreissenid mussels has profoundly altered benthic physical environments and whole-lake nutrient cycling in the Great Lakes over the past several decades. The resurgence of the filamentous green algaCladophoraappears to be one of the consequences of this invasion. SloughedCladophoradeteriorates water quality, fouls recreational beaches, and may contribute to outbreaks of avian botulism, which have been especially severe in the Sleeping Bear Dunes National Lakeshore (SLBE) region of Lake Michigan. To help determine the fate of sloughedCladophora, a Lagrangian particle trajectory model was developed to track the transport ofCladophorafragments in the nearshore zone based upon a physical transport-mixing model. The model results demonstrate that the primary deposition sites of sloughedCladophorawithin the SLBE region are mid-depth sites not far away from their initial growth area. Because of high algae production in the nearshore waters and limited exchange between the inner and outer bay, the shoreline beach of Platte Bay appears to be particularly vulnerable to fouling, with overall three times as many accumulated particles as those along the Sleeping Bear Bay and Good Harbor Bay. The results of this model may be used to guide regional environmental management initiatives and provide insights into the mechanisms responsible for avian botulism outbreaks. This model may also inform the development of whole-lake ecosystem models that account for nearshore-offshore interactions.