Temporal and spatial variations in the polychaete (Annelida) populations on the upper continental slope of the northern Gulf of Mexico

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• 作者：Fangyuan Qu^a ; ^c ; ^d ; Yuning Wang^b ; ^c ; ^d ; Gilbert T. Rowe^c ; ^d ; ^{roweg@tamug.edu}
• 关键词：Polychaete worms ; Gulf of Mexico ; Temporal variations ; Beta diversity ; Upper continental slope ; Depth zonation
• 刊名：Deep Sea Research Part I: Oceanographic Research Papers
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：119
• 期：Complete
• 页码：91-99
• 全文大小：1234 K
• 卷排序：119

文摘

Polychaete worms (Annelida), the dominant macrofaunal taxon in most fine-grained marine sediments, changed in species composition from 1983–85 to 2000–02 at nine locations on the upper continental slope of the northern Gulf of Mexico (GoM). The assemblages exhibited relative stability in abundance and diversity, but fell into six separate groups of species (>35% similarity) that were related more to time-of-sampling than depth. The upper slope experiences steep gradients in the environment but this had secondary effects on species turnover (depth-related zonation or Beta diversity). Significantly higher densities (p<0.05) in April 1984, suggest that seasonal recruitment may have occurred but the higher densities were attributed to only two species.