Spatial and Temporal Variation in the Diets of Pacific Staghorn Sculpins Related to Hydrological Factors in a Glacially Influenced Estuary
Spatial and Temporal Variation in the Diets of Pacific Staghorn Sculpins Related to Hydrological Factors in a Glacially Influenced Estuary
复制标题
与受冰川影响的河口水文因素相关的太平洋鹿角杜父鱼饮食的时空变化
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Douglas H. Duncan
中科院分区：
文献类型：
--
作者：
Emily J. Whitney;A. Beaudreau;Douglas H. Duncan
摘要在阿拉斯加东南部，大量的淡水流入河口，这些淡水来自冰川的变薄和退缩，以及周围沿海温带雨林的高降雨量。流入海岸的淡水径流影响河口生境的物理和化学性质，进而影响生物群落的结构和动态。这项研究量化了太平洋鹿角杜父鱼Leptocottus armatus饮食的时间和空间变化，这是了解气候驱动的淡水径流变化如何转化为北美西海岸沿着河口高度丰富的消费者的摄食生态变化的重要一步。每月（2014年4月至9月）从不同源头水文的河口的三个潮间带站点收集鹿角杜父鱼的胃内容物。Staghorn Sculpins（N = 402）消耗了各种海洋猎物，包括底栖无脊椎动物，幼鱼，陆生和水生动物。
AbstractIn southeastern Alaska, a large volume of freshwater flows into estuaries from thinning and retreating glaciers and from high rainfall in the surrounding coastal temperate rainforest. Freshwater runoff to the coast affects the physical and chemical properties of estuarine habitats and, in turn, the structure and dynamics of biological communities. This study quantified temporal and spatial variation in the diets of Pacific Staghorn Sculpins Leptocottus armatus as an important step toward understanding how climate-driven changes in freshwater runoff may translate into shifts in the feeding ecology of a highly abundant consumer in estuaries along the west coast of North America. Stomach contents of Staghorn Sculpins were collected monthly (April–September 2014) from three intertidal sites at the mouths of rivers that differ in their headwater hydrology. Staghorn Sculpins (N = 402) consumed a variety of marine prey items including epibenthic invertebrates, juvenile fishes, and terrestrial and aquatic...