鱼的栖息地:鱼类栖息地和康复至关重要

鱼类栖息地和路易斯安那州海岸恢复

r·格伦·托马斯。

doi:https://doi.org/10.47886/9781888569124.ch18

抽象的。——大小的变化发生在路易斯安那州的河口鱼类栖息地管理创建一个独特的挑战。路易斯安那州领导国家的沿海土地损失,全国约有70%的损失。自然和人为因素都参与沿海土地损失在路易斯安那州:沉降、侵蚀、沉积和淡水赤字,渠道化,平均海平面上升。破坏自然的密西西比河三角洲循环尤其不利于河口鱼类的栖息地。导航和防洪需求导致河的几乎完全检测,防止正常漫滩洪水、通道填充和切换、三角洲和小三角洲开发和相邻和下降气流沼泽沉积物营养。由此产生的系统是一个河口栖息地的数量和质量与快速退化湿地环境有关。尽管下沉的相对产值沼泽表面通常是非常高的,这种情况是不可持续的。鱼产量急剧下滑预期下一个世纪。联邦、州和地方沿海恢复项目正试图解决河口栖息地的丧失与一些技术,可能产生局部渔业生产和分布的变化。BOB国际体育临时资源位移可以导致增加收获成本,和盆地规模的变化可能是特别难以接受资源用户满意目前的状况。 Harvesters have demonstrated reluctance, and may lack the financial flexibility, to forfeit expected current catches for predicted enhancement of long-term fisheries production. In some instances, both sportfishers and commercial resource users have expressed concern over estuarine freshening and turbidity from restoration inputs from riverine sources. Additional public perception difficulties with restoration efforts arise from misunderstandings of the nature of estuarine functions, particularly of the importance of nursery habitat and of the value of low-salinity marshes as nursery habitat. Significant improvement in the outlook for estuarine fish habitat in Louisiana will require long-term and large-area vision from resource managers and the public.