Development of the Fish Community in a New South Carolina Reservoir
Development of the Fish Community in a New South Carolina Reservoir
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南卡罗来纳州新水库鱼类群落的发展
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
J. Heuer
中科院分区：
文献类型：
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作者：
M. Paller;J. Gladden;J. Heuer
-钢溪在1985年被围困形成L湖之前，有28种鱼类栖息。到1986年初，这些物种中有6种成功地定居在L湖(即建立了繁殖种群)；它们都是营养和栖息地通才。除了一个例外，在接下来的两年里，随着更典型的水库生态系统物种被引入L湖，这些物种减少或消失。与原始殖民者相比，引进的物种体型更大，表现出更大的营养专门化。早期殖民者的减少与水库物种的增加之间的密切对应，加上非生物环境中没有同时发生可能导致物种丧失的变化，表明物种间的相互作用是所观察到的群落变化的原因。竞争和捕食似乎都是促成因素，尽管无法确定这些过程的相对重要性。鉴于物种在L湖定居的速度和顺序，没有证据表明优先效应，即先前建立的物种阻止后来到达的物种的殖民。L湖鱼类群落在前3年的发展似乎在很大程度上是一个确定性的过程，最初受从钢溪进入L湖的物种的栖息地要求和偏好控制，后来受L湖原始定居者与引入物种之间的种间相互作用控制。
-Twenty-eight species of fish inhabited Steel Creek before it was impounded in 1985 to create L Lake. By early 1986, six of these species had successfully colonized L Lake (i.e., established reproducing populations); all were trophic and habitat generalists. With one exception, these species declined or disappeared during the next 2 yr as species more typical of reservoir ecosystems were introduced into L Lake. The introduced species were larger-bodied and exhibited greater trophic specialization than the original colonists. The close correspondence between the decline of the early colonists and the increase of the reservoir species, coupled with an absence of concurrent changes in the abiotic environment likely to result in species losses, indicated that interspecific interactions were responsible for the observed community changes. Both competition and predation appeared to be contributing factors, although the relative importance of these processes could not be determined. Given the rate and order in which species colonized L Lake, there was no evidence of priority effects, in which previously established species prevent colonization by later arriving species. The development of the L Lake fish community during the 1st 3 yr appeared to be a largely deterministic process, controlled initially by the habitat requirements and preferences of the species that had access to L Lake from Steel Creek and later by interspecific interactions between the original colonists of L lake and the introduced species.