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首页> 外文期刊>Estuarine Coastal and Shelf Science >Coupling between populations of copepod taxa within an estuarine ecosystem and the adjacent offshore regions
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Coupling between populations of copepod taxa within an estuarine ecosystem and the adjacent offshore regions

机译：河口生态系统内co足类群的种群与邻近海域之间的耦合

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Population dynamics in open systems are complicated by the interactions of local demography and local environmental forcing with processes occurring at larger scales. A local system such as an estuary or bay may contain a zooplankton population that effectively becomes independent of regional dynamics or the local dynamics may be closely coupled to a broader scale pattern. As an alternative, the details of migration and advection may mean that dynamics in a local system are coupled to other specific areas rather than tracking the overall dynamics at a larger scale. We used a reconstructed time series (1973 -1987) for copepod taxa to examine the extent to which zooplankton dynamics in Galway Bay reflect processes in broader areas of the NE Atlantic. Continuous Plankton Recorder (CPR) counts were used to establish time series for nine offshore ecoregions, with the regions themselves defined using underlying patterns of chlorophyll variability. The open nature of Galway Bay was reflected in strong associations between bay zooplankton counts and offshore CPR data in a majority of cases (7/10). For each zooplankton taxon, there were large differences among regions in the degree of association with Galway Bay time series. Akaike weights indicated that one ecoregion tended to be the dominant link for each taxon. This indicates that the zooplankton of the Bay reflect more than the local modification of a regional signal and that different zooplankton in the bay may have separate source regions. The data from Galway Bay also fall within a 'sampling shadow' of the CPR. Later years of the time series showed evidence for changes in phenology, with spring zooplankton peaks generally occurring earlier in the year for smaller species.
机译：开放系统中的人口动态由于局部人口统计学和局部环境强迫与大规模过程的相互作用而变得复杂。诸如河口或海湾的局部系统可能包含浮游动物种群，这些种群实际上独立于区域动态，或者本地动态可能与更广泛的规模模式紧密相关。作为替代方案，迁移和对流的细节可能意味着本地系统中的动力学耦合到其他特定区域，而不是大规模地跟踪总体动力学。我们对co足类生物群使用了重建的时间序列（1973年至1987年），以研究戈尔韦湾浮游动物动力学在多大程度上反映了东北大西洋广大地区的过程。连续性浮游生物记录仪（CPR）计数用于建立9个近海生态区的时间序列，这些区域本身使用叶绿素变异性的基本模式进行定义。在大多数情况下（7/10），海湾浮游动物数量与近海CPR数据之间的紧密联系反映了戈尔韦湾的开放性。对于每个浮游生物分类群，与戈尔韦湾时间序列的关联度在区域之间存在很大差异。 Akaike权重表明，一个生态区往往是每个分类单元的主要链接。这表明海湾的浮游动物比区域信号的局部改变所反射的更多，并且海湾中的不同浮游动物可能具有独立的源区。来自戈尔韦湾的数据也落入了CPR的“抽样阴影”之内。时间序列的后几年显示出物候变化的证据，春季浮游动物高峰通常发生在较小物种的一年中。

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