Response and Compensation to a Bivalve Invasion by an Aquatic Ecosystem

9508981 STRAYER水生生态系统对双壳类入侵的反应和补偿来自世界各地的数千种植物和动物已经在北美定居。 在某些情况下，这些外来物种似乎对本地生态系统几乎没有影响，而在其他情况下，本地物种和生态系统受到了深刻和不可逆转的影响。 我们正在研究斑马贻贝，一种欧洲害虫，对哈德逊河生态系统的影响。 斑马贻贝大约在1990年到达哈德逊河，现在是这条河中数量最多的动物。 在河流150公里的河段内，浮游植物和小型浮游动物（食物链底层的小型植物和动物）的密度急剧下降，但生态系统的其他组成部分受到的影响要轻得多。 我们将使用长期的实地研究，计算机模型，和小规模的实验，以检查如何不同的部分哈德逊河生态系统的斑马贻贝人口的反应。 通过研究斑马贻贝入侵哈德逊的细节，我们希望确定控制本地生态系统对外来物种入侵敏感性的一般特征。 ??

9508981 STRAYER Response and compensation to a bivalve invasion by an aquatic ecosystem Thousands of species of plants and animals from around the world have become established in North America. In some cases, these exotic species seem to have had little or no effect on native ecosystems, whereas in other cases native species and ecosystems have been deeply and irreversibly affected. We are studying the effects of the zebra mussel, a European pest, on the Hudson River ecosystem. The zebra mussel arrived in the Hudson in about 1990, and is now by far the most abundant animal in the river. It has dramatically reduced densities of phytoplankton and small zooplankton (the small plants and animals at the base of the food chain) over a 150-km reach of the river, but other components of the ecosystem have been affected much less severely. We will use long-term field studies, computer models, and small-scale experiments to examine how the various parts of the Hudson River ecosystem respond to the zebra mussel population. By studying the details of the zebra mussel invasion in the Hudson, we hope to identify the general features that control the sensitivity of native ecosystems to invasions of exotic species. ??