2014 Marine Biological Association (MBA) Yealm River non-native species timed search

Timed searches undertaken by the Marine Biological Association (MBA) to search for non-native species in the Yealm Estuary. Searches primarily focused on the Pacific Oyster (Magallana gigas), although other non-natives were recorded. Abundance was primarily Present/Not present, but in some cases non-standard units of abundance (eg. 'Not common') were used.本数据集为海洋生物协会（Marine Biological Association, MBA）为搜寻伊尔姆河口外来物种而开展的定时调查。本次调查主要聚焦于太平洋牡蛎（Magallana gigas），同时也记录了其他外来物种。物种丰度的记录方式以“存在/不存在”为主，但部分案例采用了非标准丰度单位（例如“不常见”）进行标注。