Laboratório de Ciências Marinhas, Universidade do Sul de Santa Catarina, Av Colombo Sales 84, Laguna, SC, 88790-000, Brazil.
Environ Monit Assess. 2010 Mar;162(1-4):81-93. doi: 10.1007/s10661-009-0777-0. Epub 2009 Feb 24.
The impact of mussel farms on the benthic environment was investigated using free-living nematode assemblages as indicators of environmental condition of the Enseada do Brito, a shallow embayment in South Brazil. The studied area is located at the State of Santa Catarina, responsible for 90% of the production of mussel farmed in the country. Samplings were carried out quarterly, from July 2004 to May 2005, below mussel ropes and at control sites located 300 m apart from the longlines. The results suggested that the mussel culture changed ecological functioning of the benthic environment at studied coastal embayment. The intense organic loads due to the biodeposition of the mussel farms, which had been in production for more than 10 years, have turned fine and well-sorted sand bottoms into a muddy deposit with significantly higher total organic content than the control. The number of nematode genera, diversity, dominance and trophic diversity were significantly lower under the mussel farms than at the control sites. The mussel farms biodeposition had also affected the temporal variability of nematode assemblages, which was detected only for samples at the control sites. The low depth and environmental energy, together with the age of the farms, were probably responsible for the observed changes in the nematode assemblages.
采用自由生活线虫组合作为巴西南部恩塞纳达湾（Enseada do Brito）底栖环境状况的指示物，研究了贻贝养殖场对底栖环境的影响。研究区域位于圣卡塔琳娜州，该州负责全国 90%的贻贝养殖场的生产。从 2004 年 7 月至 2005 年 5 月，每季度进行一次采样，在贻贝绳索下和距长绳 300 米的对照点进行采样。结果表明，贻贝养殖改变了研究沿海湾的底栖环境的生态功能。由于贻贝养殖场的生物沉积，强烈的有机负荷，已经超过 10 年的生产，已经将细而分选良好的砂底变成了泥泞的沉积物，其总有机含量明显高于对照点。在贻贝养殖场下，线虫属的数量、多样性、优势度和营养多样性明显低于对照点。贻贝养殖场的生物沉积也影响了线虫组合的时间可变性，这仅在对照点的样本中检测到。低水深和环境能量，加上养殖场的年龄，可能是观察到线虫组合变化的原因。
