Debenay J-P, Marchand C, Molnar N, Aschenbroich A, Meziane T
UMR 7159, IPSL/LOCEAN, Centre IRD France Nord, 32 Avenue Henri Varagnat, 93143 Bondy Cedex, France.
IRD, UR 206 - UMR 7590 IMPMC, F-98848 New Caledonia, France.
Mar Pollut Bull. 2015 Apr 15;93(1-2):103-20. doi: 10.1016/j.marpolbul.2015.02.009. Epub 2015 Mar 7.
In New Caledonia, semi-intensive shrimp farms release untreated effluents into the mangrove. Foraminiferal assemblages were analyzed for assessing the impact of effluent release on the benthic compartment. Comparison was made between samples collected (1) in an effluent receiving mangrove before and after the rearing cycle, and (2) for one-year monitoring an effluent receiving and a control mangrove. The distribution of foraminiferal assemblages was primarily driven by the gradient between Rhizophora stands and salt-flats, related to salinity and tidal elevation, and by seasonal cycles. The potential impact of effluent release was due to the combined effects of normal-saline effluents on surface salinity, and of nutrient input and microbial stimulation on food availability. Foraminiferal assemblages did not indicate a substantial impact of farm effluents and suggest that semi-intensive shrimp farming using mangrove for effluent discharge may appear as a sustainable solution in New Caledonia, when considering only the impact on the mangrove itself.
在新喀里多尼亚，半集约化养虾场将未经处理的废水排放到红树林中。为评估废水排放对底栖生物区的影响，对有孔虫组合进行了分析。比较了在养殖周期前后在一个接纳废水的红树林中采集的样本，以及对一个接纳废水的红树林和一个对照红树林进行的为期一年的监测。有孔虫组合的分布主要受红树群落和盐滩之间与盐度和潮汐高度相关的梯度以及季节周期的驱动。废水排放的潜在影响是正常盐度废水对表层盐度的综合影响，以及营养物质输入和微生物刺激对食物供应的影响。有孔虫组合并未表明养殖废水有实质性影响，这表明仅考虑对红树林本身的影响时，在新喀里多尼亚利用红树林排放废水的半集约化养虾养殖可能是一种可持续的解决方案。
