Survey of adult and juvenile periwinkle snail (Littoraria irrorata) density in mid-marsh and creekbank plots at GCE LTER study sites in October 2014.

To characterize spatial variation in the adult and juvenile density of periwinkle snails, Littoraria irrorata, within two zones in the salt marsh, the mid-marsh and creekbank, and across a gradient in salinity and distance to ocean, we surveyed snail density in October 2014. In each marsh zone at each GCE LTER permanent monitoring site, we counted the number of adult and juvenile snails in 8 replicate quadrats.

为刻画波纹滨螺（Littoraria irrorata）成体与幼体密度在盐沼内两个生境分区（盐沼中带与溪岸带）以及沿盐度、距海距离梯度的空间变异特征，本研究于2014年10月开展了滨螺密度调查。在各GCE LTER长期监测站点的每个盐沼生境分区中，我们对8个重复样方内的成体与幼体滨螺数量进行了计数。