Replication data for: Long-term monitoring in Barkley Sound: a temporal analysis of intertidal biodiversity on Wizard Islet, British Columbia from 1997 to 2017

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, 2007 and 2009, and the exposed site was resampled in 2002 and 2003. In 2017, the exposed site was sampled again. Data is presented here for macroalgae and colonial fauna cover (%), and invertebrate presence/absence for species richness. 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). Fifteen vertical transects were randomly selected at the exposed site. Tag numbers were 3, 4, 9, 12, 15, 18, 19, 20, 21, 24, 30, 40, 44, 45, 50. Sampling was done at tidal heights of 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 3.5m. Quadrats of 25x25cm were used to estimate percent cover of macroalgae and colonial fauna, and invertebrate presence/absence for species richness. Data was collected by students in the Coastal Biodiversity and Conservation course taught by Dr. Barb Beasley and Dr. Caroline Fox with Teaching Assistant Sarah Friesen July 24 - September 1, 2017.1997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，旨在采集巴克利湾（Barkley Sound）巫师岛（Wizard Islet）两处潮间带站点的大型生物（macroorganisms）分布与丰度基线数据。两处站点分别于2001年、2007年及2009年完成重采样；其中暴露型站点还额外于2002年、2003年及2017年开展了采样工作。本次公开的数据集包含大型藻类（macroalgae）与集群动物（colonial fauna）的盖度百分比数据，以及用于统计物种丰富度（species richness）的无脊椎动物（invertebrate）存在/缺失记录。巫师岛（48°51’29.5"N, 125°09’31"W）坐落于巴克利湾的鹿群群岛（Deer Group Islands）内，低潮时总面积为1.73公顷。遮蔽型站点（浪击暴露度较低）位于岛屿东北侧一段50米长的固定岩岸，以墨角藻属（Fucus）和虾形藻属（Phyllospadix，海草）为典型优势类群。暴露型站点位于岛屿西南侧一段50米长的固定岩岸，以羽毛海带（Egregia，feather-boa kelp）、鹅颈藤壶（goose-necked barnacles）及翅藻属（Alaria，褐藻）为典型特征类群。暴露型站点共随机选取15条垂直样带，编号依次为3、4、9、12、15、18、19、20、21、24、30、40、44、45、50。采样在潮高0.2米、0.5米、1米、1.5米、2米、2.5米、3米及3.5米处开展。研究采用25cm×25cm的样方（quadrats）估算大型藻类与集群动物的盖度，并通过记录无脊椎动物的存在/缺失情况以统计物种丰富度。本数据集由芭布·比斯利博士（Dr. Barb Beasley）与卡罗琳·福克斯博士（Dr. Caroline Fox）开设的《海岸生物多样性与保护》课程的学生，于2017年7月24日至9月1日完成采集，助教为莎拉·弗赖森（Sarah Friesen）。