The abundance and distribution of echinoderms in nearshore hard-bottom habitats near Anvers Island, western Antarctic Peninsula
The abundance and distribution of echinoderms in nearshore hard-bottom habitats near Anvers Island, western Antarctic Peninsula
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南极半岛西部安特卫岛附近近岸硬底栖息地棘皮动物的丰度和分布
DOI：
10.1017/s0954102012000569
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发表时间：
2012
影响因子：
1.6
通讯作者：
R. Ross
中科院分区：
文献类型：
--
作者：
Brittny A. White;J. McClintock;C. Amsler;C. Mah;M. Amsler;Stephanie L. White;L. Quetin;R. Ross
摘要棘皮动物在南极半岛的近岸硬底(100米深)生境中有很好的表现，在那里它们可能是底栖动物生产、碳流和群落结构决定因素的重要贡献者。本研究评估了南极半岛中西部安弗斯岛三公里范围内五个采样点浅层(2-15米)棘皮动物的密度。文中列举了Odontaster Validus、Granaster Nutrix、Lysasterias perrieri和Adelasterias Papillosa等小行星，并列举了两个蛇形科的蛇形虫、Psolrux coatsi和Psolus carolineae和1个黄瓜科的代表，以及普通的棘棘体Sterechinus appayeri。棘皮动物的平均总密度很高(34.9只m-2)，从小行星的21.9只m-2到海参科的2.7只m-2不等。2种褐藻生态型和3种褐藻生态型与小行星、蛇尾藻或海鞘类的丰度除与褐藻生物量呈正相关外，其余均无显著相关性。目前的研究表明，近岸硬底棘皮动物在碳循环中很重要，它们对海洋酸化的固有脆弱性可能会对社区产生影响。
Abstract Echinoderms are well represented in nearshore hard-bottom (< 100 m depth) habitats along the Antarctic Peninsula where they are presumably important contributors to benthic production, carbon flow, and determinants of community structure. The present study assesses the densities of echinoderms at shallow depths (2–15 m) at five sampling sites within three kilometres of Anvers Island on the central western Antarctic Peninsula. The asteroids Odontaster validus, Granaster nutrix, Lysasterias perrieri and Adelasterias papillosa, two ophiuroids in the Amphiuridae, the holothuroids Psolicrux coatsi and Psolus carolineae and one representative of the Cucumaridae, and the regular echinoid Sterechinus neumayeri were enumerated. Mean total echinoderm densities were high (34.9 individuals m-2) and ranged from 21.9 individuals m-2 for asteroids to 2.7 individuals m-2 for holothuroids. With the exception of a positive relationship between the abundance of the regular echinoid Sterechinus neumayeri and the biomass of the brown alga Himanthothallus grandifolius, no significant relationships were found between the abundance of asteroids, ophiuroids, or holothuroids and two species of brown algae or three algal ecotypes. The present study indicates nearshore hard-bottom echinoderms are important in the carbon cycle and their inherent vulnerability to ocean acidification may have community-level impacts.