Effects of Resident Species on Recruitment into a Community: Larval Settlement Versus Post-Settlement Mortality in the Oyster Crassostrea virginica
Effects of Resident Species on Recruitment into a Community: Larval Settlement Versus Post-Settlement Mortality in the Oyster Crassostrea virginica
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常驻物种对群落招募的影响：维吉尼亚牡蛎的幼虫定居与定居后死亡率
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
R. Zajac
中科院分区：
文献类型：
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作者：
R. Osman;R. Whitlatch;R. Zajac
实验室和现场实验表明，各种常见的，固着的无脊椎动物，包括藤壶，海鞘，苔藓虫，影响的解决和解决后丰富的牡蛎Crassostrea virginica（Gmelin）。虽然影响的性质各不相同，大多数物种都减少了牡蛎定居覆盖和删除基板可供附件，并增加了相邻表面上的解决方案。单生海鞘Ciona longa（L.）和柄海鞘（Styela clava（Herdman））是牡蛎幼虫的捕食者。定居后的生存和增长也受到强烈影响的固着物种的存在。在大多数情况下，影响是负面的，并与物种的丰度。数据表明，对营养食物的竞争是导致生长和存活率降低的最可能原因。对于许多常驻物种，减少牡蛎定居在自己的暴露表面，增加定居在邻近的基板上，并减少定居后的生存率在theu的存在导致这些物种havanly对净招聘的影响不大。这些结果表明，需要区分从定居到补充期间底栖无脊椎动物种群之间的相互作用。
Laboratory and field experiments revealed that a variety of species of common, sessile invertebrates, including barnacles, ascidians, and bryozoans, affected the settlement and post-settlement abundance of the oyster Crassostrea virginica (Gmelin). While the nature of the effects varied, most species both reduced oyster settlement by covering and removing substrate available for attachment, and increased settlement on adjacent surfaces. The solitary ascidians Ciona intestinalis (L.) and Styela clava (Herdman), were found to be predators of oyster larvae. Post-settlement survivorship and growth were also strongly affected by the presence of sessile species. In most cases the effects were negative and correlated with the abundances of the species. Data suggest that competition for planktonic food was the mostly likely cause of reduced growth and survivorship. For many resident species, the combination of reduced oyster settlement on their own exposed surfaces, increased settlement on substrate adjacent to them, and decreased post-settlement survivorship in theu presence resulted in these species havlng little effect on net recruitment. These results demonstrate the need for distinguish~ng interactions among benthic invertebrate populations during the period from settlement to recruitment.