Plastic pellet (nurdle) abundance collected by citizen scientists on shorelines across several countries from 2018-11-07 to 2022-05-30 (NCEI Accession 0259486)
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title: Plastic pellet (nurdle) abundance collected by citizen scientists on shorelines across several countries from 2018-11-07 to 2022-05-30 (NCEI Accession 0259486)
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abstract: This dataset contains counts of plastic pellet (nurdle) abundance (reported in units of counts) that were collected by citizen scientists on shorelines across several countries from 2018-11-07 to 2022-05-30, in a spreadsheet format. Citizen scientists watch a four-minute training video on how, when, and where to collect, as well as where to submit the data. The survey consists of hand picking nurdles for a 10 minute period that starts once the first nurdle has been collected.
purpose: These plastic pellet (nurdle) data were collected in order to determine the abundance of nurdles on shorelines of multiple locations in several countries.
credit: Related Funding Agency: 11th Hour Racing: Grant No. G-1906-58461
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name: NCEI Accession 0259486 v1.1
description: published 2022-09-28T18:37:07Z
function: (CI_OnLineFunctionCode) download
role: (inapplicable)
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dataQualityInfo: (DQ_DataQuality)
scope: (DQ_Scope)
level: (MD_ScopeCode) dataset
lineage: (LI_Lineage)
processStep: (LE_ProcessStep)
description: Parameter or Variable: MICROPLASTIC CONCENTRATION (measured); Units: counts of nurdles; Observation Category: in situ; Sampling Instrument: handpicking; Sampling and Analyzing Method: Citizen scientists watch a four-minute training video on how, when, and where to collect, as well as where to submit the data. Citizen scientists who are able to conduct regular sampling are encouraged to choose a beach, or multiple beaches, to survey once a month. All surveys start at the water line and move up to the nearest/first high tide line. Once the surveyor has located the beginning point, a ten minute timer is started, and they begin searching for nurdles. If no nurdles are found at the first high tide line after 10 min, the volunteer then moves to the second high tide line, and so on until the highest wrack line or vegetation line is searched. Each tide or wrack line is searched for ten minutes before moving to the next. Volunteers only move to the next line, if no nurdles were found at the previously searched line. Once a nurdle is found, the timer is restarted for 10 min and nurdle collection begins by hand picking. If nurdles are found at the first high tide line, then that is the only wrack line that will be surveyed at this site. During the survey, all nurdles are placed directly into a baggie or jar to reduce the likelihood of losing the pellets. After the 10 minute nurdle collection period, the surveyor stops and counts the number of nurdles collected. The surveyor records the time, date, and GPS location of the survey. The volunteers are also asked to record any notes, such as whether the nurdles were found at the newest high tide or whether there were other natural or manmade debris on the beach. If no nurdles were found at any of the wrack lines up to the highest inland wrack line, which is often a sand dune, vegetation line, road, or seawall, then a zero is recorded as the number of nurdles collected. All data are submitted online into the www.NurdlePatrol.org web portal. After data are uploaded to the website, nurdles are disposed of properly or retained for education purposes. Each continuous time period that a single volunteer spends searching for nurdles is considered one survey. Each reported total number of nurdles found is considered a count. Multiple surveys can therefore result in a single count if a group of people surveying together report a single total number of nurdles collected. Since surveys are often conducted by groups that report a single count and are sometimes shorter or longer than the standard 10-minute collection time, each nurdle count is standardized to the number of nurdles collected by one individual in 10 min. For example, if two individuals survey for a 30 minute period and the surveyors combined collected 100 nurdles, the standardization process would divide the total number of nurdles collected by two (100 nurdles ÷ 2 surveyors= 50 nurdles per surveyor), then divide that number into 10 minute increments (50 nurdles per surveyor ÷ 30/10 min=16.6 nurdles per surveyor per 10 min). If the standardized number comes out to less than 1 nurdle (for example 0.75), it is rounded up to 1 nurdle. Also, if the survey time is less than 10 minutes by an individual or group, a note is made that the survey did not meet the minimum requirement for a full survey.; Data Quality Method: There is a risk of artificially inflating nurdle abundance values if data standardization is applied to counts associated with survey times shorter than the standard 10 min. Volunteers sometimes shorten the survey period if very large numbers of nurdles are present and counting the collected nurdles will be extremely time-consuming and labor-intensive. In addition, volunteers are discouraged from sampling high-abundance areas if the labor associated with a strict 10-minute minimum collection period is perceived to be unreasonable..
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metadataMaintenance: (MD_MaintenanceInformation)
maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) asNeeded
maintenanceNote: Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.
contact: (CI_ResponsibleParty)
organisationName: NOAA National Centers for Environmental Information
role: (CI_RoleCode) custodian
