Saltmarsh as habitat for fish and nektonic crustaceans: Challenges in sampling designs and methods
Saltmarsh as habitat for fish and nektonic crustaceans: Challenges in sampling designs and methods
复制标题
盐沼作为鱼类和游动甲壳类动物的栖息地：采样设计和方法的挑战
DOI：
10.1046/j.1442-9993.1999.00974.x
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发表时间：
1999
期刊：
影响因子：
1.5
通讯作者：
R. Connolly
中科院分区：
文献类型：
--
作者：
R. Connolly
本文综述了盐沼作为鱼类和内源甲壳类动物（如对虾和机会蟹）直接栖息地的生态作用。关于牛顿直接利用盐沼的信息质量很差，即使是最有影响力的作品也受到明显的限制。由于采样困难、糟糕的采样设计以及对洪水状况和景观结构不一致的报告，对盐沼中神经元使用进行概括的尝试受到了阻碍。在被淹没的浅层植被沼泽中取样浮游生物的困难导致浮游生物工作的结果是碎片化的。已经描述了一系列采样方法，这些方法在可移植性、尺寸、地上结构的数量、中子逃逸率和费用方面有所不同；目前还没有一个成为标准。盐沼浮游生物研究中较差的实验设计包括缺乏复制、有限的空间尺度以及在管理改变之前缺乏基线数据。试图通过渔获量数据与沼泽损失之间的相关性来确定盐沼面积或质量损失对商业渔业的影响，应采用积极的适应性管理。第二种类型的研究，旨在了解盐沼对渔业的重要性，可以在较小的规模上有效地解决。为了帮助比较不同研究的结果，应报告洪水状况占沼泽被淹没时间的比例，以及景观结构占潮间带、水池和排水小溪覆盖的沼泽的比例。然后，应将地点的洪水状况和景观结构以及采样时的景观结构置于所研究的沼泽的典型模式的背景下。
This is a review of research into the ecological role of saltmarsh as habitat used directly by fish and nektonic crustaceans such as shrimp (prawns) and portunid crabs. The quality of information about direct use of saltmarshes by nekton is poor, with even the most influential works suffering from obvious limitations. Attempts to generalize about nekton use of saltmarshes are hampered by sampling difficulties, poor sampling design, and inconsistent reporting of flooding regime and landscape structure. The difficulty in sampling nekton from shallow, vegetated marsh flats while inundated contributes to the fragmentary results of nekton work. A range of sampling methods have been described that vary in portability, size, amount of above-ground structure, escape rates of nekton, and expense; none has yet become standard. Poor experimental design in studies of saltmarsh nekton includes lack of replication, limited spatial scale, and lack of baseline data before management changes are made. Attempts to determine effects on commercial fisheries of losses in area or quality of saltmarsh by correlations between catch data and marsh loss should use active adaptive management. A second type of study, aimed at understanding how the saltmarsh is important to fisheries, can be tackled usefully at a smaller scale. To assist in the comparison of results from different studies, flooding regime should be reported as a proportion of time the marsh is submerged, and landscape structure as proportions of the marsh that are covered by intertidal flats, pools and drainage creeks. Flooding regime and landscape structure at the sites and at the time of sampling should then be put in the context of the typical pattern for the marsh under study.