Manomet Intertidal Green Crab Project - Powered by Anecdata.org

出現紀錄
最新版本 published by The Community Environmental Health Laboratory at MDI Biological Laboratory on 1月 1, 2023 The Community Environmental Health Laboratory at MDI Biological Laboratory

下載最新版本的 Darwin Core Archive (DwC-A) 資源,或資源詮釋資料的 EML 或 RTF 文字檔。

DwC-A資料集 下載 11 紀錄 在 English 中 (7 KB) - 更新頻率: 無計畫更新
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說明

This project monitors green crab populations in the rocky intertidal zone. http://www.manomet.org Project goal Monitoring intertidal populations of the invasive European green crab. What participants do: Collecting data using quadrat surveys. Invasive species have caused major disruptions to ecosystems worldwide. The European green crab invaded North America in the 1800s, and is considered one of the world’s 100 worst invaders by the IUCN. Observations of green crab population trends are essential for predicting and managing the ecological and economic impacts of this harmful invasive species. This protocol was developed in an effort to create a standardized method for assessing green crab population dynamics in the rocky intertidal zone of New England and Atlantic Canada. The protocol was designed to be accessible to multiple users including researchers, educators, students, and citizen scientists. Although it was designed for surveying crab populations, this protocol is easy to adapt and could be used for any number of intertidal species. The resulting data collected using this protocol has a wide range of uses, including to inform ecological research, conservation efforts, mitigation strategies, and fishery development, as well as for educational outreach purposes.

資料紀錄

此資源出現紀錄的資料已發佈為達爾文核心集檔案(DwC-A),其以一或多組資料表構成分享生物多樣性資料的標準格式。 核心資料表包含 11 筆紀錄。

此 IPT 存放資料以提供資料儲存庫服務。資料與資源的詮釋資料可由「下載」單元下載。「版本」表格列出此資源的其它公開版本,以便利追蹤其隨時間的變更。

版本

以下的表格只顯示可公開存取資源的已發布版本。

權利

研究者應尊重以下權利聲明。:

此資料的發布者及權利單位為 The Community Environmental Health Laboratory at MDI Biological Laboratory。 This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.

GBIF 註冊

此資源已向GBIF註冊,並指定以下之GBIF UUID: 3151231f-0ad5-480d-8529-456dd4a74e55。  The Community Environmental Health Laboratory at MDI Biological Laboratory 發佈此資源,並經由GBIF-US同意向GBIF註冊成為資料發佈者。

關鍵字

Occurrence

聯絡資訊

Marissa McMahan
  • 出處
  • Project Administrator
Anecdata.org
Jessie Batchelder
  • 出處
  • Project Administrator
Anecdata.org
Anecdata.org Contributors
  • 出處
  • Data Contributors
Anecdata.org
Jane Disney
  • 出處
  • 連絡人
  • Associate Professor of Environmental Health
MDI Biological Laboratory
  • 159 Old Bar Harbor Rd.
04609 Bar Harbor
ME
US
Cait Bailey
  • 出處
  • 連絡人
  • Systems Developer
MDI Biological Laboratory
  • 159 Old Bar Harbor Rd.
04609 Bar Harbor
ME
US
Ashley Taylor
  • 出處
  • 連絡人
  • Community Manager
MDI Biological Laboratory
  • 159 Old Bar Harbor Rd.
04609 Bar Harbor
ME
US
Alexis Garretson
  • 元數據提供者
  • 出處
  • 使用者
  • 連絡人
  • Community Environmental Health Laboratory Manager
MDI Biological Laboratory
  • 159 Old Bar Harbor Rd.
04609 Bar Harbor
ME
US
Anecdata.org
Community Environmental Health Laboratory
  • 連絡人
  • Community Environmental Health Laboratory
MDI Biological Laboratory
  • 159 Old Bar Harbor Rd.
04609 Bar Harbor
ME
US

地理涵蓋範圍

Maine, United States

界定座標範圍 緯度南界 經度西界 [43.46, -70.384], 緯度北界 經度東界 [44.23, -68.52]

時間涵蓋範圍

起始日期 / 結束日期 2020-09-11 / 2021-03-10

計畫資料

Anecdata is a free online citizen science platform developed by the Community Lab at the MDI Biological Laboratory in Bar Harbor, Maine. Anecdata is used by hundreds of individuals and organizations to gather and access citizen science observations and provides a platform to easily collect, manage, and share their citizen science data. How Anecdata works: Project managers create projects, creating datasheets that participants fill out to share their observations. Participants join projects and use the Anecdata website or mobile app to share their observations with the project. Project data is now available for anyone to view and download!

計畫名稱 Anecdata.org
辨識碼 Anecdata.org

參與計畫的人員:

Cait Bailey
  • 研究主持人
Ashley Taylor
  • 典藏經理

取樣方法

Collecting data using quadrat surveys.

研究範圍 Invasive species have caused major disruptions to ecosystems worldwide. The European green crab invaded North America in the 1800s, and is considered one of the world’s 100 worst invaders by the IUCN. Observations of spatiotemporal green crab population dynamics are essential for predicting and managing the ecological and economic impacts of this harmful invasive species. This protocol was developed in an effort to create a standardized method for assessing green crab population dynamics in the rocky intertidal zone of New England and Atlantic Canada. The protocol was designed to be accessible to multiple users including researchers, educators, students, and citizen scientists. Although it was designed for surveying crab populations, this protocol is easy to adapt and could be used for any number of intertidal species. The resulting data collected using this protocol has a wide range of uses, including to inform ecological research, conservation efforts, mitigation strategies, and fishery development, as well as for educational outreach purposes.

方法步驟描述:

  1. 1) Timing of survey work: 1.1) Conduct surveys between May-November, during the height of productivity in the intertidal zone. 1.2) Schedule surveys around negative or zero tides (generally new and full moon cycles) to allow for adequate time in the low intertidal zone (i.e., at least 2 hours).
  2. 2. Pre-survey preparation: 2.1) Locate and print all field guides and data collection sheets (see Appendices) prior to conducting the survey if that is the preferred method. If using the Anecdata app for field guides and data collection, visit the Anecdata website and join the Intertidal Green Crab Project. The data collection sheet and Anecdata collection categories are identical.
  3. 4. Conducting survey 4.1) Prior to arriving at the survey site, record the following information on the Intertidal Survey Data Sheet (Appendix 3) or directly into the Intertidal Green Crab Project on Anecdata: site name, sampling date, participants, time and height of low tide at the location/date you will be sampling (determined using the NOAA Tide Predications website, or an app such as Tides), and lunar phase (determined using a lunar calendar such as www.moongiant.com). 4.2) Upon arriving at the survey site, locate the 100 m section of low intertidal shoreline where the survey will be conducted, unpack gear, and organize data sheets and field guides. 4.3) *Optional: Measure water temperature using a waterproof digital thermometer in the shallow water adjacent to the sampling area. Measure salinity by placing several drops of water collected adjacent to the sampling area onto the refraction prism of a salinity refractometer. Record water temperature in ℃ and salinity in parts per thousand (ppt) on the Intertidal Survey Data Sheet or directly into the Intertidal Green Crab Project on the Anecdata app. 4.4) Begin the survey by haphazardly tossing the 1 m2 quadrat within the predefined low intertidal zone area that runs parallel to the shoreline (a transect tape is not needed to conduct the survey because the sample area has already been defined). Record a visual estimate of the percent of both moveable rock (i.e., cobble/gravel that you can look underneath) and algae canopy cover (e.g. Ascophyllum or Fucus spp.) within the quadrat to the nearest quarter percent (i.e., 0, 25, 50, 75, or 100%). Rocky intertidal habitat is often patchy and can contain areas of sand, mud, ledge, or other habitats where green crabs are not found. To avoid skewing density estimates by sampling unsuitable habitat, only sample quadrats with greater than 50% movable rock, or greater than 50% algal canopy. Also avoid sampling areas where boulders or ledges are noticeably elevated above the profile of the shoreline within the low intertidal zone, as this habitat may be more representative of the mid intertidal zone. 4.5) Within each quadrat, lift moveable rocks or cobble and carefully move aside algae to look for crabs. Be sure to replace all rocks and algae as you found them. Collect all of the crabs you find and store them in a bucket until the entire quadrat has been searched. 4.6) Identify the species of each crab using the Intertidal Crab Field Guide (Appendix 1, or source on Anecdata project platform) and record using the species codes listed on the Intertidal Survey Data Sheet (Appendix 3) or on the Intertidal Green Crab Project on the Anecdata app. 4.7) Measure the carapace width (CW) of each crab across the widest part of the carapace, spanning from tip to tip of the terminal spines, to the nearest 1 mm using Vernier calipers. 4.8) Use the abdomen (or ‘apron’) on the ventral side of the crab to determine sex. Male crabs tend to have a narrow, pointed abdomen and female crabs tend to have a wider, beehive shaped abdomen (Appendix 1). Only record sex for crabs ≥ 10 mm CW. 4.9) For all crabs, record number of claws, number of legs, shell condition (i.e., hard- or soft-shell as determined by whether the carapace resists (hard) or gives (soft) when finger pressure is applied), and the presence (i.e., ovigerous) or absence of extruded eggs for females. 4.10) *Optional: Record color for green crabs, but not other crab species, using the color protocol developed by Young and Elliot (Appendix 2). This protocol should only be used if the actual paint chips can be sourced and brought into the field, as printed versions can vary substantially. Identify pre-molt shell condition for green crabs using external pre-molt indicators (Appendix 4, or source on Anecdata project platform). Pre-molt green crabs are within 3 weeks of molting and are of particular interest to the emerging soft-shell green crab fishery. 4.11) Return all crabs to the habitat within the quadrat once all measurements and characteristics have been recorded. 4.12) Continue haphazardly tossing the quadrat within the predefined low intertidal area until you have sampled a total of 10 m2. Continually move forward along the low intertidal area of shoreline and ensure that quadrats are separated by a minimum of 1 m so that resampling does not occur and a maximum of 10 m so that the survey area does not exceed 100 m.
  4. 5. Data management and analysis 5.1) If using data sheets, check all raw data sheets for errors and legibility post-survey, photocopy, scan, and archive. Use the photocopy for data entry into an excel spreadsheet (see Appendix 5 for example) or into the Intertidal Green Crab Project on Anecdata. Store scanned data sheets electronically. 5.2) Conduct data analyses appropriate to the design of the study. Useful population metrics include crab density (total number of crabs divided by total number of quadrats sampled), sex ratio, cumulative size frequency, injury rate, shell condition ratio, and overall species encounter rates (e.g., % of native vs. invasive crabs).

額外的詮釋資料

替代的識別碼 3151231f-0ad5-480d-8529-456dd4a74e55
https://doi.org/10.15468/m4hpux
https://bison.usgs.gov/ipt/resource?r=manomet