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首页> 外文期刊>ICES Journal of Marine Science >An evaluation of benthic community structure in and around the Sackville Spur closed area (Northwest Atlantic) in relation to the protection of vulnerable marine ecosystems
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An evaluation of benthic community structure in and around the Sackville Spur closed area (Northwest Atlantic) in relation to the protection of vulnerable marine ecosystems

机译：关于保护萨克维尔马刺封闭区（西北大西洋）及其周围的底栖生物群落结构，以保护脆弱的海洋生态系统

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摘要

The benthic macrofaunal community structure is investigated within and around a closed area at Sackville Spur in the Northwest Atlantic to ascertain whether continued exclusion of bottom fishing can be justified. This and other similar closed areas have been introduced by the Northwest Atlantic Fisheries Organisation (NAFO) to protect areas of likely occurrence of taxa that are indicative of vulnerable marine ecosystems (VMEs) from the damaging effects of bottom-contact fishing gear. Results reveal subtle yet significant differences in macrofaunal assemblage composition and community structure between inside and outside the closed area, between above and below the 1200-m depth contour (i.e. the historical depth limit of fishing), and between areas where dense sponge spicule mats are either present or absent. Differences were observed in many assemblage metrics; however, the most revealing was the greater abundance, biomass, diversity, and number of VME indicative taxa inside the closed area than outside. Overall community composition is also significantly different between treatments. Depth, sediment temperature, and the proportion of clay within sediments are important in shaping the faunal assemblage. The importance of the effects of fishing is discussed, although it is not possible to ascertain if fishing is the direct cause behind observed differences in the macrofaunal assemblage. A continued closure of the area is recommended, as well as options for streamlining the evaluation process of other closed areas.
机译：在西北大西洋的萨克维尔马刺（Sackville Spur）的一个封闭区域内和附近调查底栖大型动物群落结构，以确定是否有理由继续排除底层捕鱼。西北大西洋渔业组织（NAFO）引入了该禁区和其他类似的禁区，以保护可能表明分类单元的区域，这些区域表明脆弱的海洋生态系统（VME）不受海底接触渔具的破坏影响。结果显示，封闭区域内外之间，1200米深度等高线以下（即历史捕鱼深度极限）之间以及密实海绵针垫区域之间的大型动物群落组成和群落结构存在细微但显着的差异。存在或不存在。在许多组合指标中观察到差异；然而，最显着的是封闭区域内的VME指示类群的丰度，生物量，多样性和数量要比外部更大。两种治疗之间的总体社区组成也存在显着差异。深度，沉积物温度和沉积物中粘土的比例对于塑造动物群落很重要。讨论了捕鱼效果的重要性，尽管无法确定捕鱼是否是观察到的大型动物组合差异的直接原因。建议继续关闭该区域，并建议精简其他封闭区域的评估过程。

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