https://scholars.lib.ntu.edu.tw/handle/123456789/385642
標題: | Modeling dynamic interactions and coherence between marine zooplankton and fishes linked to environmental variability | 作者: | CHIH-HAO HSIEH | 關鍵字: | Copepods; Dynamic interactions; Ecosystem dynamics; Environmental variability; Fish populations | 公開日期: | 2014 | 卷: | 131 | 起(迄)頁: | 120-129 | 來源出版物: | Journal of Marine Systems | 摘要: | The dynamics of marine fishes are closely related to lower trophic levels and the environment. Quantitatively understanding ecosystem dynamics linking environmental variability and prey resources to exploited fishes is crucial for ecosystem-based management of marine living resources. However, standard statistical models typically grounded in the concept of linear system may fail to capture the complexity of ecological processes. We have attempted to model ecosystem dynamics using a flexible, nonparametric class of nonlinear forecasting models. We analyzed annual time series of four environmental indices, 22 marine copepod taxa, and four ecologically and commercially important fish species during 1977 to 2009 on Georges Bank, a highly productive and intensively studied area of the northeast U.S. continental shelf ecosystem. We examined the underlying dynamic features of environmental indices and copepods, quantified the dynamic interactions and coherence with fishes, and explored the potential control mechanisms of ecosystem dynamics from a nonlinear perspective. We found: (1) the dynamics of marine copepods and environmental indices exhibiting clear nonlinearity; (2) little evidence of complex dynamics across taxonomic levels of copepods; (3) strong dynamic interactions and coherence between copepods and fishes; and (4) the bottom-up forcing of fishes and top-down control of copepods coexisting as target trophic levels vary. These findings highlight the nonlinear interactions among ecosystem components and the importance of marine zooplankton to fish populations which point to two forcing mechanisms likely interactively regulating the ecosystem dynamics on Georges Bank under a changing environment. © 2013 Elsevier B.V. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84893804161&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/385642 |
DOI: | 10.1016/j.jmarsys.2013.12.003 | SDG/關鍵字: | Copepods; Dynamic interaction; Ecosystem dynamics; Environmental variability; Fish populations; Ecosystems; Fish; Fisheries; Linear systems; Marine biology; Dynamics; crustacean; ecosystem management; environmental change; fish; forecasting method; marine environment; nonlinearity; numerical model; taxonomy; top-down control; trophic level; zooplankton; Atlantic Ocean; Georges Bank; Copepoda; Pisces |
顯示於: | 海洋研究所 |
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