Fiddler crab and mollusk density in tidal creeks off the Rowley River, (Rowley and Ipswich, MA)

Climate change is predicted to shift or extend the range of warm-water species poleward. In 2014, the fiddler crab was observed for the first time at the PIE LTER site in Northeast Massachusetts, which is north of its historical range. Beginning in 2014, density estimates were collected.据预测，气候变化将促使暖水性物种的分布范围向极地迁移或扩张。2014年，研究人员首次在马萨诸塞州东北部的PIE LTER站点观测到招潮蟹（fiddler crab），该区域位于其历史分布范围以北。自2014年起，科研团队开始采集该物种的种群密度估算数据。