Ecosystem dynamics at six contrasting sites: a generic modelling study
Ecosystem dynamics at six contrasting sites: a generic modelling study
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DOI：
10.1016/j.jmarsys.2004.02.004
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发表时间：
2004-12-01
影响因子：
2.8
通讯作者：
Gilbert, FJ
中科院分区：
文献类型：
--
作者：
Blackford, JC;Allen, JI;Gilbert, FJ
一个远洋海洋生态系统模拟模型ERSEM-2004，从欧洲区域海洋生态系统模型（ERSEM II），提出了沿着适用于六个高度对比的网站，从温带混合陆架站到永久分层的热带深海站的参数集。物理特性模拟直接耦合到ID垂直分辨湍流模型，参数化为每个站点。给出了远洋生态系统模型的数学描述。ERSEM II的良好解决的社区和脱钩的总生产和环境营养浓度包括可变的碳叶绿素比，耦合细菌生产的营养物质的可用性，提高分辨率的有机颗粒和溶解馏分和发展中浮游动物的描述。季节性的深度分辨和综合性能的比较表明，该模型产生了广泛的社区动态和结构，可以considerably相关的混合，温度，辐照度和营养供应的变化。关键环境指标的时空变异与群落结构的时空变异仅部分相关（p < 0.5）。因此，我们推断模型营养结构的复杂性以及海洋系统的复杂性对于定义对环境的生态响应非常重要。对海洋区域的物理描述可能不足以表明海洋群落的结构或功能。特别是，溶解和放牧反应被确定为重要的过程，确定生态系统动态和群落结构。群落结构（生物量）和功能（生产力）的时空变异性之间有较密切的相关性（p > 0.75）。ERSEM-2004被证明是一个强大的模型，是能够代表一系列的系统中通常描述的海洋系统。因此，该模型提出了一个潜在的基础，基于生态系统的管理嘟嘟，可能会，适当的物理表示，适用于大的地理和时间尺度与实用程序的启发式和预测研究的海洋低营养水平。(C)2004 Elsevier B. V.保留所有权利。
A pelagic marine ecosystem simulation model ERSEM-2004, developed from the European Regional Seas Ecosystem Model (ERSEM II), is presented along with a parameter set applicable to six highly contrasting sites, ranging from a temperate mixed shelf station to a permanently stratified tropical deep-ocean station. The physical characteristics are simulated by direct coupling to a ID vertically resolved turbulence model, parameterised for each site. A mathematical description of the pelagic ecosystem model is presented. Additions to ERSEM II's well resolved community and decoupling of gross production and ambient nutrient concentration include variable carbon to chlorophyll ratios, coupling of bacterial production to nutrient availability, improved resolution of the organic particulate and dissolved fractions and developments to the mesozooplankton description. Comparison of seasonally depth resolved and integrated properties illustrates that the model produces a wide range of community dynamics and structures that can be plausibly related to variations in mixing, temperature, irradiance and nutrient supply. The spatial-temporal variability in key environmental indicators only partially correlates with the spatial-temporal variability in community structure (p < 0.5). Thus we infer that the complexity of the model's trophic structure and hence that of the marine system is important in defining the ecological response to the environment. A physical description of a marine domain may not be an adequate indicator of marine community structure or function. Particularly, lysis and grazer response are identified as important processes that define ecosystem dynamics and community structure. There is a closer correlation (p > 0.75) between spatial-temporal variability in community structure (biomass) and function (production). ERSEM-2004 is shown to be a robust model that is capable of representing a range of systems commonly described in the marine system. Consequently, the model is proposed as a potential basis for an ecosystem-based management toot that may, with appropriate physical representation, be applied over large geographic and temporal scales with utility to both heuristic and predictive studies of the marine lower trophic levels. (C) 2004 Elsevier B.V. All rights reserved.