Limited functional redundancy in high diversity systems: resilience and ecosystem function on coral reefs
Limited functional redundancy in high diversity systems: resilience and ecosystem function on coral reefs
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DOI：
10.1046/j.1461-0248.2003.00432.x
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发表时间：
2003-04-01
期刊：
影响因子：
8.8
通讯作者：
Choat, JH
中科院分区：
文献类型：
--
作者：
Bellwood, DR;Hoey, AS;Choat, JH
生物多样性经常与功能冗余联系在一起。印度-太平洋珊瑚礁包含了地球上一些最多样化的生态系统，该区域记录了3000多种鱼类。尽管有这种多样性，但我们记录了区域生物地理尺度上珊瑚礁生态系统功能的变化，这是由于只有一种巨型驼头鹦鹉(Bolbometopon Muricata)被过度捕捞所致。每只鹦鹉每年摄取超过5吨的结构性珊瑚礁碳酸盐，其中近一半是活珊瑚。在相对未开发的大洋珊瑚礁上，每米总摄食率(2)与估计的珊瑚礁生长速度相平衡。然而，无论当地鱼类生物多样性如何，人类活动和生态系统破坏都是密切相关的。结果强调，在制定管理战略时需要考虑物种的功能作用，以及生物多样性和生态系统复原力之间联系的潜在弱点。
Biodiversity is frequently associated with functional redundancy. Indo-Pacific coral reefs incorporate some of the most diverse ecosystems on the globe with over 3000 species of fishes recorded from the region. Despite this diversity, we document changes in ecosystem function on coral reefs at regional biogeographical scales as a result of overfishing of just one species, the giant humphead parrotfish (Bolbometopon muricatum ). Each parrotfish ingests over 5 tonnes of structural reef carbonates per year, almost half being living corals. On relatively unexploited oceanic reefs, total ingestion rates per m(2) balance estimated rates of reef growth. However, human activity and ecosystem disruption are strongly correlated, regardless of local fish biodiversity. The results emphasize the need to consider the functional role of species when formulating management strategies and the potential weakness of the link between biodiversity and ecosystem resilience.