首页|Impacts of Aggregation Methods and Trophospecies Number on the Structure and Function of Marine Food Webs
Impacts of Aggregation Methods and Trophospecies Number on the Structure and Function of Marine Food Webs
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NETL
NSTL
万方数据
维普
Aggregation of species with similar ecological properties is one of the effective methods to simplify food web researches.However,species aggregation will affect not only the complexity of modeling process but also the accuracy of models'outputs.Se-lection of aggregation methods and the number of trophospecies are the keys to study the simplification of food web.In this study,three aggregation methods,including taxonomic aggregation(TA),structural equivalence aggregation(SEA),and self-organizing maps(SOM),were analyzed and compared with the linear inverse model-Markov Chain Monte Carlo(LIM-MCMC)model.Impacts of aggregation methods and trophospecies number on food webs were evaluated based on the robustness and unitless of ecological net-work indices.Results showed that aggregation method of SEA performed better than the other two methods in estimating food web structure and function indices.The effects of aggregation methods were driven by the differences in species aggregation principles,which will alter food web structure and function through the redistribution of energy flow.According to the results of mean absolute percentage error(MAPE)which can be applied to evaluate the accuracy of the model,we found that MAPE in food web indices will increase with the reducing trophospecies number,and MAPE in food web function indices were smaller and more stable than those in food web structure indices.Therefore,trade-off between simplifying food webs and reflecting the status of ecosystem should be con-sidered in food web studies.These findings highlight the importance of aggregation methods and trophospecies number in the analy-sis of food web simplification.This study provided a framework to explore the extent to which food web models are affected by dif-ferent species aggregation,and will provide scientific basis for the construction of food webs.
LIM-MCMC modelspecies aggregationtrophospecies numberaggregation methodsfood web indices
LI Pengcheng、ZHANG Chongliang、XU Binduo、JI Yupeng、LI Fan、REN Yiping、XUE Ying
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Laboratory of Fisheries Ecosystem Monitoring and Assessment,College of Fisheries,Ocean University of China,Qingdao 266003,China
Field Observation and Research Station of Haizhou Bay Fishery Ecosystem,Ministry of Education,Qingdao 266003,China
Shandong Marine Resources and Environment Research Institute,Shandong Provincial Key Laboratory of Restoration for Marine Ecology,Yantai 264006,China
Laboratory for Marine Fisheries Science and Food Production Processes,Laoshan Laboratory,Qingdao 266237,China
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National Key R&D Program of ChinaNational Key R&D Program of China
NETL
NSTL
万方数据
维普
