Rocky intertidal monitoring of Wizard Islet in 2003

In 1997 the Bamfield Marine Sciences Centre established a long-term monitoring project to collect baseline data on the distribution and abundance of macroorganisms at two intertidal sites on Wizard Islet in Barkley Sound. Both sites were resampled in 2001, and the exposed site was resampled in 2002. In 2003 fifteen transects at the exposed site only were sampled again. Tag numbers were 7, 9, 10, 11, 12, 13, 18, 20, 25, 26, 27, 34, 44, 45. Data presented here for algal cover (%), invertebrate cover (%), invertebrate density and seastar density was obtained from a 2009 Microsoft Access database. Wizard Islet (48°51’29.5”N, 125°09’31”W) is located within the Deer Group Islands in Barkley Sound and has an area of 1.73 hectares at low tide. The sheltered site (with less wave exposure) is located on a 50m stretch of fixed rocky shore on the northeast side and is characterized by Fucus and Phyllospadix (seagrass). The exposed site is located on a 50m stretch of fixed rocky shore on the southwest side and is characterized by Egregia (feather-boa kelp), goose-necked barnacles and Alaria (brown alga).

1997年，班菲尔德海洋科学中心（Bamfield Marine Sciences Centre）启动了一项长期监测项目，旨在收集巴克利湾（Barkley Sound）向导岛（Wizard Islet）两处潮间带站点的大型生物分布与丰度基准数据。两处站点均于2001年完成复采，其中暴露型站点另在2002年再次采样。2003年，仅针对该暴露型站点的15条样带开展了再次采样，样带编号依次为7、9、10、11、12、13、18、20、25、26、27、34、44、45。本次公开的藻类盖度（%）、无脊椎动物盖度（%）、无脊椎动物密度及海星密度数据，均提取自2009年的Microsoft Access数据库。向导岛地理坐标为48°51′29.5″N，125°09′31″W，隶属于巴克利湾的鹿群群岛（Deer Group Islands），低潮时总面积为1.73公顷。其中遮蔽型站点（波浪暴露程度更低）位于岛屿东北侧一段50米长的固定岩岸，优势类群为墨角藻属（Fucus）与大叶藻属（Phyllospadix，海草）；暴露型站点位于岛屿西南侧一段50米长的固定岩岸，优势类群为鹅掌菜属（Egregia，羽毛海带）、茗荷型藤壶以及裙带菜属（Alaria，褐藻）。