Regional study of Melampus bidentatus density and other invertebrates in northeast U.S. salt marshes

We sampled the coffee-bean snail, Melampus bidentatus in four habitats (Spartina patens, tall/creekside S. alterniflora, stunted S. alterniflora, and transitional S. patens) in 8 marshes in the northeast U.S. , including the Plum Island Estuary. Overall, snails were larger in the stunted S. alternilfora and transitional S. patens habitats than in S. patens ones. Only 2 snails were found in the tall S. alterniflora. Temperature, relative humidity and other inverts were also measured. These data are published in Johnson and Williams 2017 ( http://onlinelibrary.wiley.com/doi/10.1002/ece3.3291/full ) and refered to as the Regional Study.本研究于美国东北部的8处沼泽湿地（包含普拉姆岛河口（Plum Island Estuary））中，对双齿尖耳螺（Melampus bidentatus，俗称咖啡豆螺）开展了采样调查，采样覆盖4类生境：海滨盐草（Spartina patens）生境、高大溪岸型互花米草（Spartina alterniflora）生境、矮生互花米草（Spartina alterniflora）生境以及过渡型海滨盐草（Spartina patens）生境。整体观测结果表明，矮生互花米草与过渡型海滨盐草生境中的螺个体体型大于海滨盐草生境中的个体；仅在高大互花米草生境中发现2只螺。本研究同时测定了环境温度、相对湿度以及其他无脊椎动物（invertebrates，简称inverts）的相关指标。本数据集相关内容已发表于Johnson与Williams于2017年发表的研究（链接：http://onlinelibrary.wiley.com/doi/10.1002/ece3.3291/full），该研究亦被称为“区域研究（Regional Study）”。