BENTHIC RESPONSE INDEX FOR ASSESSING INFAUNAL COMMUNITIES ON THE SOUTHERN CALIFORNIA MAINLAND SHELF
BENTHIC RESPONSE INDEX FOR ASSESSING INFAUNAL COMMUNITIES ON THE SOUTHERN CALIFORNIA MAINLAND SHELF
复制标题
评估南加州大陆架海底动物群落的底栖响应指数
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
Ronald G. Velarde
中科院分区：
文献类型：
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作者：
R. Smith;M. Bergen;S. Weisberg;D. Cadien;A. Dalkey;D. Montagne;J. Stull;Ronald G. Velarde
虽然通常测量底栖动物群落以评估环境管理在保护生物资源方面的有效性，但用于解释结果数据的工具往往是主观的或具体地点的。我们提出了一个客观的定量指标，用于整个南加州沿海大陆架环境的应用，该指标测量了底栖生物群落的状况，并定义了环境干扰水平的阈值。该指数的计算采用两步过程，其中采用排序分析来量化717个样本校准数据集中的污染梯度。根据各物种在梯度上的丰度分布，确定了各物种的污染耐受性。该指数计算为样本中物种的丰度加权平均污染耐受度。建立了参考条件和4个生物反应水平的阈值。建立参考条件作为指标值。
Although benthic infaunal communities are commonly measured to assess the effectiveness of environmental management in protecting biological resources, the tools used to interpret the resulting data are often subjective or site specific. We present an objective, quantitative index for application throughout the southern California coastal shelf environment that measures the condition of a benthic assemblage, with defined thresholds for levels of environmental disturbance. The index was calculated using a two-step process in which ordination analysis was employed to quantify a pollution gradient within a 717-sample calibration data set. The pollution tolerance of each species was determined based upon its distribution of abundance along the gradient. The index is calculated as the abundance-weighted average pollution tolerance of species in a sample. Thresholds were established for reference condition as well as for four levels of biological response. Reference condition was established as the index value ...