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两年的监测能让我们了解到委内瑞拉珊瑚礁的哪些情况?全球珊瑚礁监测网络南美洲热带地区节点(STA - GCRMN)。

What can two years of monitoring tell us about Venezuelan coral reefs? the Southern Tropical America Node of the Global Coral Reef Monitoring Network (STA-GCRMN).

作者信息

Cróquer Aldo, Debrot Denise, Klein Eduardo, Kurten Martina, Rodríguez Sebastian, Bastidas Carolina

机构信息

Universidad Simón Bolivar, Departamento Biología de Organismos, Caracas 1080-A, Venezuela.

出版信息

Rev Biol Trop. 2010 May;58 Suppl 1:51-65. doi: 10.15517/rbt.v58i1.20023.

Abstract

In spite of their economic importance, coral reef communities of the world are rapidly decreasing, and an adequate management planification is needed. The benthic and fish communities of Dos Mosquises Sur and Madrizqui at Los Roques National Park, and Caiman and Cayo Norte at Morrocoy National Park, in Venezuela were monitored during 2003 and 2004. The CARICOMP method was used to describe the benthic community, and the AGRRA protocol was applied to the fish community assessment. The benthic cover of five broad living categories (i.e. corals, algae, sponge and octocorals) differed across the sites (Nested ANOVA, p < 0.05), but there were no statistical differences between parks. Despite being on different parks, the benthic cover in Dos Mosquises Sur and Cayo Norte was similar (76% based on Bray-Curtis), whereas Caiman differed greatly (57- 68%) from all other sites. The cover of hard coral, algae, sponges and octocorals was similar between 2003 and 2004 in all four sites. Similarly, the fish community structure of both parks did not change over time, and was dominated by herbivores (Pomacentridac, Scaridae and Acanthuridae). However, commercially important carnivores (e.g. Lutjanids and Serranids) were more abundant in Los Roques than in Morrocoy. Although it was expected that the benthic cover and fish community would reflect greater differences between Los Roques and Morrocoy, only the fish community appeared healthier in Los Roques, whereas Cayo Norte (Morrocoy), had a coral cover similar or higher than both sites of Los Roques. Thus, our results suggest that in Venezuela, oceanic reef sites are not necessarily 'healthier' (i.e. higher coral cover) than land-influenced coral communities. The addition of three new sites and the reincorporation of Caiman has improved and expanded the monitoring capabilities in Venezuela and it represents the first step towards the consolidation of a coral reef monitoring program for the country.

摘要

尽管具有经济重要性,但世界珊瑚礁群落正在迅速减少,因此需要制定适当的管理规划。2003年和2004年期间,对委内瑞拉洛斯罗克斯国家公园的多斯莫斯奎斯苏尔和马德里兹基以及莫罗科伊国家公园的凯门和北卡约的底栖生物和鱼类群落进行了监测。采用CARICOMP方法描述底栖生物群落,并将AGRRA协议应用于鱼类群落评估。五个主要生物类别(即珊瑚、藻类、海绵和八放珊瑚)的底栖生物覆盖率在各地点之间存在差异(嵌套方差分析,p < 0.05),但各公园之间没有统计学差异。尽管位于不同的公园,但多斯莫斯奎斯苏尔和北卡约的底栖生物覆盖率相似(基于布雷-柯蒂斯相似度为76%),而凯门与所有其他地点差异很大(57%-68%)。2003年至2004年期间,所有四个地点的硬珊瑚、藻类、海绵和八放珊瑚的覆盖率相似。同样,两个公园的鱼类群落结构没有随时间变化,并且以食草动物(雀鲷科、鹦嘴鱼科和刺尾鱼科)为主。然而,具有商业重要性的食肉动物(如笛鲷科和鮨科)在洛斯罗克斯比在莫罗科伊更为丰富。尽管预计底栖生物覆盖率和鱼类群落会反映出洛斯罗克斯和莫罗科伊之间更大的差异,但只有洛斯罗克斯的鱼类群落看起来更健康,而北卡约(莫罗科伊)的珊瑚覆盖率与洛斯罗克斯的两个地点相似或更高。因此,我们的结果表明,在委内瑞拉,海洋珊瑚礁地点不一定比受陆地影响的珊瑚群落“更健康”(即珊瑚覆盖率更高)。新增的三个地点以及凯门的重新纳入改善并扩大了委内瑞拉的监测能力,这是该国巩固珊瑚礁监测计划的第一步。

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