SBC LTER: Beach: Dynamics of intertidal wrack consumer distributions on an SBC Beach

Distribution of Intertidal Wrack Consumer Beds Over
Time Zonation of intertidal biota on sandy beaches is extremely dynamic
and challenging to model due to the unstable nature of the sandy
substrate and the high mobility of the biota. Distributions of these
biota can shift strongly with tides, wave runup, storms, and beach
conditions on a variety of temporal scales. High frequency
measurements of the positions of intertidal beds of a mid and an
upper shore invertebrate species, including wrack consuming talitrid
amphipods ( Megalorchestia spp) and a deposit
feeding polychaete ( Euzonus mucronata ), were
conducted on an SBC study beach, West Isla Vista, for one year.

潮间带海藻碎屑消费者群落的时间分布
沙滩潮间带生物的分带格局极具动态性，且建模难度极高——沙质底质不稳定与潮间带生物较强的移动性是主要制约因素。此类生物的分布会随潮汐、波浪增水、风暴以及不同时间尺度下的海滩环境变化发生显著偏移。本研究于西伊斯莱维斯塔的SBC研究海滩开展了为期一年的高频监测，针对中潮带与高潮带两类无脊椎动物的潮间带栖息群落分布位置进行观测；所涉类群包括食海藻碎屑的跳钩虾科（talitrid amphipods）动物（大钩虾属 *Megalorchestia* 物种）以及沉积物食性多毛类动物尖吻异足虫 *Euzonus mucronata*。