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首页> 外文会议>IASTED International Conference on Environmental Modelling and Simulation >SPATIAL AND TEMPORAL PATTERNS OF ESTUARINE FISH COMMUNITIES RELATIVE TO HABITAT STRUCTURE AND FRESHWATER INFLOW
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SPATIAL AND TEMPORAL PATTERNS OF ESTUARINE FISH COMMUNITIES RELATIVE TO HABITAT STRUCTURE AND FRESHWATER INFLOW

机译：河口鱼群相对于栖息地结构和淡水流入的空间和颞型模式

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摘要

Distribution maps of species are often used to prioritize areas for conservation and management. However, variability in freshwater inflow may cause temporal changes in the distribution of estuarine fishes, and thus hinder our ability to identify general spatial distribution patterns of these species. In this analysis, we used relationships between estuarine landscape structure, defined as the amount and spatial arrangement of habitat types (salt marshes, mangroves, and seagrass beds), and the fish community to describe the distribution of juveniles of fishery species and associated ecologically important fish species in shallow areas of Charlotte Harbor, Florida (USA). Through cluster analysis, we identified three broad-scale spatial zones with relatively similar community compositions across the riverine-estuarine landscape. We then compared temporal variability in the abundance of fish species in the three zones during two time periods: two years with lower-than-average monthly freshwater inflow and two years with average to higher-than-average monthly inflow. We found that densities of most species were higher during the years with higher freshwater inflow than they were during lower inflow years. In addition, we found that the center of most species' abundances did not generally move from one zone to another based on changes in freshwater inflow patterns.
机译：物种的分布地图通常用于优先考虑保护和管理领域。然而，淡水流入的可变性可能导致河口鱼类分布的时间变化，从而阻碍了我们识别这些物种的一般空间分布模式的能力。在这种分析中，我们使用了河口景观结构之间的关系，定义为栖息地类型（盐沼，红树林和海草床）的数量和空间排列，以及鱼群描述渔业物种幼鱼分布和相关生态重要性的分布鱼类在夏洛特港口，佛罗里达州（美国）浅地区。通过集群分析，我们确定了三个具有相对相似的河流横向景观的社区组成的宽阔空间区。然后，在两个时间段期间，我们将在三个区域中的鱼类丰富的鱼类中的时间变异性比较：两年，每月低于平均平均淡水流入，两年平均为每月流入高于平均平均水平。我们发现，多年来，在淡水流入较低的淡水流入期间，大多数物种的密度较高。此外，我们发现大多数物种丰度的中心通常不会根据淡水流入模式的变化从一个区域移动到另一个区域。

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