Spatial and seasonal patterns of habitat partitioning in a guild of southern California tidepool fishes
Spatial and seasonal patterns of habitat partitioning in a guild of southern California tidepool fishes
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DOI：
10.3354/meps196253
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发表时间：
2000-01-01
影响因子：
2.5
通讯作者：
Davis, JLD
中科院分区：
文献类型：
--
作者：
Davis, JLD
五种鱼，斜杜父鱼analis，Girella nigricans，Hypsoblenius gilberti，Gobiesox rhessodon和Gibbonsia elegans，通常出现在南加州的岩石潮间带。要检查在何种程度上潮池栖息地隔离的5种鱼类，栖息地分区模式之间和物种内，确定在2个网站在圣地亚哥。从1996年11月至1997年8月，每3个月在105个潮池中测量鱼类密度、种类组成和鱼类大小。假设进行了测试有关隔离的栖息地之间的不同物种和不同大小类内的物种相对于潮池的潮间带高度，表面积，深度，粗糙度和百分比藻类覆盖的特点。为了进一步研究这些结果，进行了一个人工田间试验。潮池之间和鱼类物种内的分区。潮池的特点，最重要的分区是潮间带的高度，深度和粗糙度，这些特征的重要性顺序不同的每个物种。栖息地划分大小类内的物种，虽然不像物种之间的分区，也主要是基于潮池潮间带的高度和粗糙度。虽然鱼类丰度随季节变化，但除C.肛门，季节性稳定。C.肛门分布是由于新成员的到来，而不是在成年栖息地的季节性变化。不同物种和物种内不同大小级使用不同类型的潮池可以限制这些群体之间的接触，从而限制低潮期间的直接和间接竞争。
Five species of fish, Clinocottus analis, Girella nigricans, Hypsoblennius gilberti, Gobiesox rhessodon, and Gibbonsia elegans, commonly occur in southern California's rocky intertidal zone. To examine the extent to which tidepool habitat is segregated by the 5 fishes, habitat partitioning patterns among and within the species were determined at 2 sites in San Diego. Fish density, species composition, and fish size were measured in 105 tidepools every 3 mo from November 1996 to August 1997. Hypotheses were tested pertaining to the segregation of habitat among different species and different size classes within species relative to the tidepool characteristics of intertidal height, surface area, depth, rugosity, and percent algal cover. A manipulative field experiment was conducted to further investigate these results. Tidepools were partitioned among and within fish species. Tidepool characteristics most important in partitioning were intertidal height, depth, and rugosity, with the order of importance of these characteristics different for each species. Habitat partitioning between size classes within species, although not as great as partitioning among species, was also based largely on tidepool intertidal height and rugosity. Although fish abundance changed seasonally, species' distribution patterns, with the exception of C. analis, were seasonally stable. The seasonal change in C. analis distribution was due to the arrival of new recruits rather than a seasonal change in adult habitat. The use of different types of tidepools by different species and by different size classes within species serves to limit contact among these groups, and therefore both direct and indirect competition, during low tide.