Toward the development of an ecosystem model ensemble to support adaptive management in Lake Ontario

被引:0
|
作者
Neumann, Alex [1 ]
Fernando, Yasasi [1 ]
Saber, Ali [2 ]
Arhonditsis, George B. [1 ]
机构
[1] Univ Toronto, Dept Phys & Environm Sci, Ecol Modelling Lab, Toronto, ON M1C 1A4, Canada
[2] Univ Windsor, Sch Environm, Windsor, ON N9B 3P4, Canada
来源
ENVIRONMENTAL REVIEWS | 2024年 / 32卷 / 02期
关键词
ecosystem modelling; phosphorus loading; Lake Ontario; oligotrophication; fisheries; adaptive management; NEARSHORE-OFFSHORE EXCHANGES; UNSATURATED FATTY-ACIDS; INVASIVE QUAGGA MUSSELS; MASS-BALANCE MODELS; WATER-QUALITY; GREAT-LAKES; PHOSPHORUS LOADS; HAMILTON HARBOR; ZEBRA MUSSELS; EXPLOITED ECOSYSTEMS;
D O I
10.1139/er-2023-0100
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Notwithstanding the continuing advancement of our understanding of the broader ecosystem functioning in Lake Ontario, emerging evidence suggests that there are fundamental knowledge gaps to accurately describe the relationship between exogenous phosphorus (P) loading and in-lake total phosphorus (TP) concentrations. The whole-lake load appears to frequently exceed the Great Lakes Water Quality Agreement (GLWQA) interim target of 7000 metric tonnes<middle dot>year-1, although the offshorewater P concentrations are consistently below the GLWQA interim substance concentration objective of 10 mu g TP<middle dot>L-1. Contrasting ecological conditions prevail in different locations of Lake Ontario, owing to the significant urban footprint along the shoreline but also the capacity of dreissenid mussels to sequester P in the littoral zone. Specifically, low ambient P levels threaten fisheries productivity in offshore waters, while nuisance benthic algae (predominantly Cladophora) and toxinproducing cyanobacteria blooms affect the water quality in the nearshore zone. The present study offers a technical analysis of the recent and ongoing modelling work that has been conducted in Lake Ontario and can be potentially used to address the multitude of ecosystem management challenges. Our aim is to provide an overview of all the major models developed by identifying their fundamental assumptions, structural attributes, and general consistency against empirical knowledge derived from the system. The existing modelling work has opted for parsimonious representations of the lower food web coupled with granular grid configurations to effectively link hydrodynamic processes and mass transport between nearshore and offshore waters. The establishment of comprehensive ecophysiological modules that will recreate the mechanisms underlying the interplay among bioavailable phosphorus, planktonic dynamics, dreissenid mussels, and Cladophora is a critical undertaking to reproduce the water quality conditions in the nearshore zone of Lake Ontario. Striving to integrate the lower food web with fisheries and ecosystem-service modelling, we also offer a technical analysis of knowledge gaps and monitoring-assessment objectives that should be addressed to ensure that ecosystem processes of management interest are adequately measured and the local modelling enterprise is focused on suitable performance indicators.
引用
收藏
页码:231 / 262
页数:32
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