PDF(Pubmed)
Abstract：
Deep-sea coral assemblages are marine biodiversity hot spots. Because of their life history traits, deep-sea corals are highly vulnerable to the impacts of human activities such as fishing. The critically endangered \"bamboo coral\" Isidella elongata is a key structuring species of deep muddy bottoms that is susceptible to habitat destruction, particularly from trawling. A shallow population of this species was recently discovered by a multibeam and ROV survey offshore of the Asinara Island marine protected area (MPA) (northwestern Sardinia, NW Mediterranean Sea). This vulnerable marine assemblage has been found under healthy conditions at depths ranging from 110 to 298 m. Isidella elongata occurs on a muddy seafloor locally characterised by boulders associated with black coral species (Parantipathes larix and Antipathes dichotoma). The lush colonies of I. elongata seem to be related to natural protection from bottom trawling activity; nevertheless, the presence of lost fishing artisanal nets has been observed in the study area. These structuring species are indicators of vulnerable marine ecosystems, and their conservation is essential for preserving marine biodiversity. Therefore, enlarging the perimeter of the Asinara Island MPA into its deeper western waters is suggested to ensure the protection of these valuable and vulnerable marine ecosystems.
摘要：
深海珊瑚组合是海洋生物多样性的热点地区。由于他们的生活史特征，深海珊瑚极易受到捕捞等人类活动的影响。极度濒危的“竹珊瑚”Isidellaelongata是深泥泞底部的关键结构物种，易受栖息地破坏，特别是来自拖网。最近通过对Asinara岛海洋保护区（MPA）（撒丁岛西北部）的多波束和ROV调查发现了该物种的浅层种群，西北地中海）。这种脆弱的海洋组合是在健康的条件下在110至298m的深度范围内发现的。Isidellaelongata发生在泥泞的海底，其局部特征是与黑珊瑚物种有关的巨石（Parantipatheslarix和Antipathesdichotoma）。I.elongata郁郁葱葱的殖民地似乎与免受底拖网活动的自然保护有关；尽管如此，在研究区域观察到丢失的手工渔网的存在。这些结构化物种是脆弱海洋生态系统的指标，保护它们对于保护海洋生物多样性至关重要。因此,建议将Asinara岛MPA的周长扩大到其较深的西部水域，以确保保护这些宝贵和脆弱的海洋生态系统。
