Evaluation of habitat patches for coral reef fish conservation: application of metacommunity theory and species-area relationships

研究了石垣岛后礁81个斑块礁上的豆科鱼类的种类-面积关系和种类-体积关系(SVR)。我们还观察了3个优势竞争者的领地和其他劣势竞争者的运动模式。在巨大的珊瑚礁上，这3个物种分隔了它们的领土。被认为是优势竞争对手的黑盾杆菌是一种优势分散者，因为它使用了大型珊瑚礁的垂直平面和81个珊瑚礁中的一半以上，这两个珊瑚礁都没有优势竞争对手S.lividus的栖息。在大型珊瑚礁中，斜颈龙对物种丰富度有负面影响，这是因为它们的领地建立在地形简单的基底上，没有发现其他物种。由于后礁较浅(2米深)，礁石的高度达到了极限。SVR是预测一个地区物种总丰富度的最有用的函数。

We examined species-area relationships and species-volume relationships (SVRs) of damselfishes over 81 patch reefs on a back reef of Ishigaki Island. We also observed territoriality of 3 superior competitors and movement patterns of other less superior competitors. In the large tall reef, the 3 species segregated their territories. Stegastes nigricans, which was thought as a superior competitor, was a superior disperser because it uses the vertical plane of large reef and more than half of 81 reefs, both of which were not inhabited by the superior competitor S. lividus. The fact that Hemiglyphidodon plagiometopon had negative effects on species richness in large reefs was attributable to that their territories were established on topographically simple basement, where other species were not found. The height of reefs reached the limit because of shallowness (2m deep) in back reefs. SVR was a most useful function to predict total species richness in a place.