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Macroscopic network properties and short-term dynamic simulations in coastal ecological systems at Fildes Bay (King George Island, Antarctica)

机译：菲尔德斯湾（南极乔治王岛）沿海生态系统的宏观网络特性和短期动态模拟

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摘要

A trophic mass-balanced of the benthic/pelagic system dominated by large brown macroalgae in Fildes Bay (Antarctica) was constructed by integrating biomass, production, food spectrum, and consumption related information. The resulting trophic model was used to determine the macroscopic (emergent) properties, overall health and propagation of dynamical higher order effects within this complex Antarctic ecological system in response to simulated impacts. The magnitude of the Relative Ascendency, Relative Overhead, and Redundancy values indicates that the coastal benthic/pelagic Fildes Bay system is likely to remain less developed and therefore more resistant to perturbations than other ecological systems dominated by brown macroalgae. In terms of model component contributions to the Ascendency, detritus accounted for similar to 33% of the value, followed by the phyto-zooplankton complex (similar to 26%), macroalgae (similar to 19%), filter-feeders (similar to 7%), small epifauna (5%), and top predators (2%). Short-term or transient Ecosim dynamical responses to increase the total mortality of each model component-given mixed and top-down vulnerabilities-revealed that changes in macroalgae levels had a limited impact on the other components of the system. The filter feeder, small epifauna and benthic fishe's functional groups had the greatest effects on the remaining Fildes Bay system components. The magnitude of the System Recovery Time indicated that the Nacella concinna and small epifauna components would take the longest time to return to their initial state. Based on the outcomes obtained from the model, we suggest that this preliminary trophic model, including simulated impacts, provides promising possibilities for the determination of macroscopic baseline conditions and the most sensitive components of the Fildes Bay ecological system. (C) 2016 Elsevier B.V. All rights reserved.
机译：通过整合生物量，产量，食物谱以及与消费有关的信息，构造了南极费尔德斯湾（南极）大型底栖大型藻类为主的底栖/浮游系统的营养平衡。所得的营养模型用于确定宏观（紧急）特性，整体健康状况以及此南极复杂生态系统中动态高阶效应在模拟响应下的传播。相对上升，相对开销和冗余值的大小表明，沿海底栖/浮游菲尔德斯湾系统可能保持较不发达的状态，因此比其他以褐藻为主的生态系统更能抵抗扰动。就模型成分对上升的贡献而言，碎屑约占价值的33％，其次是植物-浮游植物复合体（约26％），大型藻类（约19％），滤食动物（约7）。 ％），小型动物群落（5％）和顶级掠食者（2％）。短期或短暂的Ecosim动态响应（增加了每个模型组件的总死亡率）给定了混合漏洞和自上而下的漏洞，这表明大型藻类水平的变化对系统其他组件的影响有限。滤嘴，小型浮游动物和底栖鱼类的功能群对其余的菲尔德斯湾系统组成部分影响最大。系统恢复时间的高低表明，机舱树和小型动物群落组件将需要最长的时间才能恢复到其初始状态。基于从模型中获得的结果，我们建议该初步的营养模型（包括模拟影响）为确定宏观基准条件和菲尔德斯湾生态系统的最敏感组成部分提供了有希望的可能性。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Ecological Complexity》 |2016年第12期|145-157|共13页
  • 作者

    Ortiz Marco; Berrios Fernando; Gonzalez Jorge; Rodriguez-Zaragoza Fabian; Gomez Ivan;

  • 作者单位

    Univ Antofagasta, Fac Ciencias Mar & Recursos Biol, Inst Ciencias Nat AvH, IA, POB 170, Antofagasta, Chile;

    Univ Antofagasta, Fac Ciencias Mar & Recursos Biol, Inst Ciencias Nat AvH, IA, POB 170, Antofagasta, Chile|Univ Antofagasta, Programa Doctorado Ciencias Aplicadas, Menc Sistemas Marinos Costeros, Antofagasta, Chile;

    Univ Antofagasta, Fac Ciencias Mar & Recursos Biol, Inst Ciencias Nat AvH, IA, POB 170, Antofagasta, Chile|Univ Antofagasta, Programa Doctorado Ciencias Aplicadas, Menc Sistemas Marinos Costeros, Antofagasta, Chile;

    Univ Guadalajara, Dept Ecol, LEMA, CUCBA, Carretera Guadalajara Nogales Km 75-5, Zapopan 45170, Jalisco, Mexico;

    Univ Austral Chile, Inst Ciencias Marinas & Limnol, Casilla 567, Valdivia, Chile;

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  • 正文语种 eng
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  • 关键词

    Ascendency; Direct and indirect effects; South Shetland Islands; Subtidal benthic habitats;

    机译：优势;直接和间接影响;南设得兰群岛;潮间带底栖生境;

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