Trophic dynamics of eight intertidal communities of the Sylt-Romo Bight ecosystem, northern Wadden Sea
Trophic dynamics of eight intertidal communities of the Sylt-Romo Bight ecosystem, northern Wadden Sea
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DOI：
10.3354/meps07137
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发表时间：
2007-01-01
影响因子：
2.5
通讯作者：
Asmus, Ragnhild
中科院分区：
文献类型：
--
作者：
Baird, Dan;Asmus, Harald;Asmus, Ragnhild
根据生境性质和独特的生物多样性，将叙尔特-罗莫湾潮间带划分为8个底栖子系统和1个中上层子系统。为每个子系统构建了定量食物网网络。每个流动模型由 56 个生物隔间和 3 个非生物隔间组成，并描述每个隔间的生物量、每个生物成分的平衡能量预算以及所有隔间之间的能量和物质流动。通过网络分析对这些模型进行了分析，揭示了它们在系统属性方面存在相当大的差异，例如系统总吞吐量（TST）、开发能力、优势和冗余，以及比较系统生态学中使用的许多无量纲比率。贻贝床是生产力最高的子系统，温度为 5095 mgC m(-2) d(-1)，TST 高达 33 571 mg C m(-2) d(-1)。每个系统中的回收材料量从泥沙滩的最高28%到贻贝床的最低2.5%不等，而各个系统的能量传递效率则从砂质浅滩的最低3.3%到贻贝床的15%最高。与其他子系统相比，贻贝床在优势度和平均互信息方面高度专业化，但弹性较差。对于优势和冗余这两个相互排斥的系统属性，大多数系统的比率在 0.8 和 1.4 之间。为中上层和贻贝床子系统计算的相对冗余指数较低，表明系统组织较差，抗干扰能力较差。
The intertidal area of the Sylt-Romo Bight was divided into 8 benthic and 1 pelagic subsystems according to habitat nature and the unique biodiversity of each. A quantitative food web network was constructed for each of the subsystems. Each flow model consists of 56 living and 3 nonliving compartments and depicts the biomass of each, a balanced energy budget for each of the living components, and the flow of energy and material between all compartments. These models were analysed by means of network analysis that revealed a considerable amount of variability between them in terms of system properties such as total system throughput (TST), development capacity, ascendency and redundancy, and a number of dimensionless ratios used in comparative systems ecology. Mussel beds stood out as the most productive subsystem at 5095 mgC m(-2) d(-1), with a high TST of 33 571 mg C m(-2) d(-1). The amount of material recycled in each of the systems ranged from a high of 28% in the muddy sand flats to a low of 2.5% in the mussel beds, while the efficiency of energy transfer in the various systems fluctuated from a low of 3.3% in the sandy shoals to a high of 15% in the mussel beds. Mussel beds are highly specialized in terms of ascendancy and average mutual information in comparison with the other subsystems, but have less resilience. Most of the systems showed ratios between 0.8 and 1.4 for the 2 mutually exclusive system attributes of ascendency and redundancy. Relative redundancy indices calculated for the pelagic and mussel bed subsystems are low, indicating less organized systems with less resistance to disturbance.