Exploring 'knowns' and 'unknowns' in tropical seascape connectivity with insights from East African coral reefs
Exploring 'knowns' and 'unknowns' in tropical seascape connectivity with insights from East African coral reefs
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DOI：
10.1016/j.ecss.2012.03.020
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发表时间：
2012-07-10
影响因子：
2.8
通讯作者：
Nystrom, Magnus
中科院分区：
文献类型：
--
作者：
Berkstrom, Charlotte;Gullstrom, Martin;Nystrom, Magnus
应用更广泛的景观视角来了解当地人口和社区的时空变化已越来越多地应用于陆地系统，以研究人类影响和土地利用变化的影响。随着当今渔业资源的大幅下降和自然沿海栖息地的迅速退化，了解相关时间和空间尺度上的栖息地配置和连通性对于海景的保护和渔业管理至关重要。珊瑚礁、海草床和红树林是热带海景的重要组成部分。这些栖息地类型的空间分布可能对跨栖息地迁移和生物之间的连通模式产生强烈影响。然而，海景破碎化和生态连通性的后果在很大程度上尚不清楚。在这里，我们回顾了文献，以概述有关热带海景内的连通性和食物网相互作用的当前知识。我们表明，关于鱼类作为移动链接以及作为营养转移和营养相互作用的一部分的信息很少。我们继续对桑给巴尔（东非）周围的海景进行深入分析，以填补文献调查中发现的一些知识空白。我们的分析表明，(i) 桑给巴尔海景中发现的所有鱼类物种中的 50% 使用两种或多种栖息地类型，(ii) 所有与珊瑚礁相关的鱼类物种中 18% 使用红树林和海草床作为幼鱼栖息地，以及 (iii) 在使用红树林和海草床作为幼鱼栖息地的珊瑚礁鱼类中，大型食肉动物和食草动物的比例很高。我们认为，了解栖息地类型内部和之间的相互联系对于热带海景的成功管理至关重要。 (c) 2012 Elsevier Ltd. 保留所有权利，
Applying a broader landscape perspective to understand spatio-temporal changes in local populations and communities has been increasingly used in terrestrial systems to study effects of human impact and land use change. With today's major declines in fishery stocks and rapid degradation of natural coastal habitats, the understanding of habitat configuration and connectivity over relevant temporal and spatial scales is critical for conservation and fisheries management of the seascape. Coral reefs, seagrass beds and mangroves are key-components of the tropical seascape. The spatial distribution of these habitat types may have strong influences on cross-habitat migration and connectivity patterns among organisms. However, the consequences of seascape fragmentation and ecological connectivity are largely unknown. Here, we review the literature to provide an overview of current knowledge with regards to connectivity and food-web interactions within the tropical seascape. We show that information on fish acting as mobile links and being part of nutrient transfer and trophic interactions is scarce. We continue by making an in-depth analysis of the seascape around Zanzibar (Eastern Africa) to fill some of the knowledge gaps identified by the literature survey. Our analysis shows that (i) fifty percent of all fish species found within the Zanzibar seascape use two or multiple habitat types, (ii) eighteen percent of all coral reef-associated fish species use mangrove and seagrass beds as juvenile habitat, and (iii) macrocarnivores and herbivores are highly represented among those coral reef fish species that use mangrove and seagrass beds as juvenile habitat. We argue that understanding the inter-linkages within and between habitat types is essential for successful management of the tropical seascape. (c) 2012 Elsevier Ltd. All rights reserved,