Temporal changes in the polychaete infaunal community surrounding a Hawaiian mariculture operation
Temporal changes in the polychaete infaunal community surrounding a Hawaiian mariculture operation
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DOI：
10.3354/meps307175
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发表时间：
2006-01-01
影响因子：
2.5
通讯作者：
McGurr, MM
中科院分区：
文献类型：
--
作者：
Lee, HW;Bailey-Brock, JH;McGurr, MM
在附近的太平洋threadfin Polydactylis sexfilis海产养殖企业的底栖生物监测工作，使我们能够研究富营养化对底栖动物群落的影响。从2个站点附近的点源多毛类动物群落进行了比较，2个控制站以外的范围内的鱼饲料和废物。回归分析表明，显着减少Shannon-Weiner多样性随着时间的推移和附近的污水源。非度量多维标度（nMDS）显示，在受影响的网站，但相对不变的多毛类群落在控制网站的物种演替和营业额的进展。相似性分析（ANOSIM）表明，在影响和控制网站，但不太明显的差异，随着时间的推移，社区结构之间的显着差异。一种丰富的、在区域广泛分布的多毛类动物Pionosylis heterocirata已经从受影响的地点消失。2机会多毛类，Capitella capitata（复合体）和Ophryotrocha adherens的丰度增加，导致在受影响的站点Shannon-Weiner多样性值（H '）下降。扩大C. capitata和O. adherens之前似乎是高密度的Myriochele oculata。这3个物种可能代表了一个顺序的演替，由于磨损缺氧在夏威夷沃茨。多毛类污染指标的出现导致受影响地点的底栖多毛类群落偏离，环境多毛类物种消失导致的物种丰富度低，群落丰度降低，反映了鱼类养殖对底栖群落的影响。这种影响可能会被夏威夷州奥廷加南海岸的公海位置冲淡。
Benthic monitoring efforts in the vicinity of a Pacific threadfin Polydactylis sexfilis mariculture venture have, allowed us to examine eutrophic effects on the infaunal community. Polychaete infaunal communities from 2 sites near the point source were compared to 2 control stations beyond the range of fish feed and wastes. Regression analysis indicated significant decreases in Shannon-Weiner diversity over time and near the effluent source. Non-metric multidimensional scaling (nMDS) showed a progression of species succession and turnover at impacted sites but relatively unchanging polychaete communities at control sites. An analysis of similarity (ANOSIM) indicated significant differences between community structures at impacted and control sites but less obvious differences over time. An abundant and regionally widespread polychaete Pionosyllis heterocirrata had disappeared from impacted sites. Increasing abundances of 2 opportunistic polychaetes, Capitella capitata (complex) and Ophryotrocha adherens, resulted in decreasing Shannon-Weiner diversity values (H') at impacted stations. Expanding populations of C. capitata and O. adherens seem to be preceded by high densities of Myriochele oculata. These 3 species may represent an order of succession due to attrition by anoxia in Hawaiian waters. Deviation of the infaunal polychaete community at impacted sites resulting from the appearance of polychaete pollution indicators, low species richness resulting from the disappearance of ambient polychaete species and depressed community abundance reflect the effects of fish mariculture on the benthic community. Such effects may be diluted by the open-ocean location on the south shore of O'ahu, Hawai'i.