Demersal assemblages in the Irish Sea, St George's Channel and Bristol Channel
Demersal assemblages in the Irish Sea, St George's Channel and Bristol Channel
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DOI：
10.1006/ecss.2000.0677
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发表时间：
2000-09-01
影响因子：
2.8
通讯作者：
Freeman, SM
中科院分区：
文献类型：
--
作者：
Ellis, JR;Rogers, SI;Freeman, SM
宏观表底无脊椎动物和底栖鱼类组合描述从101梁拖网站在爱尔兰海，圣乔治的通道和布里斯托通道。聚类分析被用来确定那些站的渔获量是相似的，在物种组成和生物量方面，并确定了六个组合。这些组合内的平均相似性为44%至58%。指示6个组合之间的差异的物种被用来描述其生物学特性。比目鱼和民建联占主导地位的细基板在近岸沃茨（Pleuronectes-Limanda组合），而海胆和太阳星占主导地位的粗基板进一步离岸（Echinus-Crossaster组合）。厚背鳎和寄居蟹是典型的过渡区（Microchirus-Pagurzls组合）。爱尔兰海泥质沉积物中以挪威龙虾和女巫为主（Nephrops-Glyptocephalus组合）。死人的手指床（Alcyonium组合）发生在粗糙的基板在近岸沃茨在整个研究区，而常见的蜘蛛蟹只占主导地位的布里斯托通道（玛雅组合）。普通海星（Asterias rubens）是所有组合的重要组成部分。这些组合的分布主要与深度，温度和衬底类型。它们的空间分布与先前描述的该地区沉积物和底栖动物群落的分布模式相似。
Macro-epibenthic invertebrate and demersal fish assemblages are described from 101 beam trawl stations in the Irish Sea, St George's Channel and Bristol Channel. Cluster analysis was used to identify those stations where catches were similar, in terms of species composition and biomass, and six assemblages were identified. The average similarity within these assemblages ranged from 44 to 58%. Species that were indicative of the differences between the six assemblages were used to describe their biological characteristics. Plaice and dab dominated on fine substrates in inshore waters (Pleuronectes-Limanda assemblage), whereas sea urchins and sun-stars dominated on the coarser substrates further offshore (Echinus-Crossaster assemblage). Thickback sole and hermit crabs were typical of the transitional area (Microchirus-Pagurzls assemblage). Norway lobster and witch dominated on the muddy sediments in the Irish Sea (Nephrops-Glyptocephalus assemblage). Dead man's fingers beds (Alcyonium assemblage) occurred on coarse substrates in inshore waters throughout the study area, whereas common spider crabs were only dominant in the Bristol Channel (Maja assemblage). The common starfish (Asterias rubens) was an important component of all assemblages. The distribution of these assemblages was primarily correlated with depth, temperature and substrate type. Their spatial distribution was similar to previously described distribution patterns of sediments and infaunal communities in the area.