Benthic-pelagic coupling on coral reefs: Feeding and growth of Caribbean sponges
Benthic-pelagic coupling on coral reefs: Feeding and growth of Caribbean sponges
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DOI：
10.1016/j.jembe.2005.07.010
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发表时间：
2006-01-24
影响因子：
2
通讯作者：
Lesser, MP
中科院分区：
文献类型：
--
作者：
Lesser, MP
人们认识到，底栖-中上层耦合以及自下而上与自上而下进程的作用对潮间带和潮下浅水海洋群落的群落结构具有重大影响。然而，自下而上的进程仍被视为主要影响自上而下进程的结果。珊瑚礁上的海绵是底栖生物群落的重要成员，在水柱生产力和底栖生物之间起着至关重要的作用。除了石珊瑚，海绵占主导地位的许多这些栖息地的水柱生产力是由主要的自养和异养微型浮游生物，海绵积极过滤。虽然无脊椎动物，鱼类和海龟发生捕食海绵，海绵Callypongia迷走神经，Agelas conifera，Aplysina fistularis从佛罗里达，伯利兹，巴哈马群岛，分别表现出一致的和显着的模式，更大的生物量，增长率和喂养，因为他们的食物供应，随着深度的增加。海绵消耗了65-93%的可用颗粒食物供应，在所有地点，海绵的大小和生长速度都随着深度的增加而增加，这表明食物供应以及自下而上的过程对这些生境中海绵的分布和丰度产生了重大影响。(c)2005 Elsevier B. V.保留所有权利。
Benthic-pelagic coupling and the role of bottom-up versus top-down processes are recognized as having a major impact on the community structure of intertidal and shallow subtidal marine Communities. Bottom-up processes, however, are still viewed as principally affecting the outcome of top-down processes. Sponges on coral reefs are important members of the benthic community and provide a crucial coupling between water-column productivity and the benthos. Other than scleractinian corals, sponges dominate many of these habitats where water column productivity is composed of mostly autotrophic and heterotrophic picoplankton that sponges actively filter. While predation upon sponges by invertebrates, fish, and turtles occurs, the sponges Callyspongia vaginalis, Agelas conifera, and Aplysina fistularis from Florida, Belize, and the Bahamas, respectively, exhibit a consistent and significant pattern of greater biomass, rates of growth, and feeding, as does their food supply, with increasing depth. sponges consume 65-93% of the available particulate food supply and, at all sites, sponges increase in size and growth rate as depth increases, suggesting that food supply and, therefore, bottom-up processes significantly influence the distribution and abundance of sponges in these habitats. (c) 2005 Elsevier B.V. All rights reserved.