A framework for inferring biological communities from environmental DNA
Environmental DNA (eDNA), genetic material recovered from an environmental medium such as soil, water, or feces, reflects the membership of the ecological community present in the sampled environment. As such, eDNA is a potentially rich source of data for basic ecology, conservation, and management,...
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Veröffentlicht in: | Ecological applications 2016-09, Vol.26 (6), p.1645-1659 |
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creator | Shelton, Andrew Olaf O'Donnell, James Lawrence Samhouri, Jameal F. Lowell, Natalie Williams, Gregory D. Kelly, Ryan P. |
description | Environmental DNA (eDNA), genetic material recovered from an environmental medium such as soil, water, or feces, reflects the membership of the ecological community present in the sampled environment. As such, eDNA is a potentially rich source of data for basic ecology, conservation, and management, because it offers the prospect of quantitatively reconstructing whole ecological communities from easily obtained samples. However, like all sampling methods, eDNA sequencing is subject to methodological limitations that can generate biased descriptions of ecological communities. Here, we demonstrate parallels between eDNA sampling and traditional sampling techniques, and use these parallels to offer a statistical structure for framing the challenges faced by eDNA and for illuminating the gaps in our current knowledge. Although the current state of knowledge on some of these steps precludes a full estimate of biomass for each taxon in a sampled eDNA community, we provide a map that illustrates potential methods for bridging these gaps. Additionally, we use an original data set to estimate the relative abundances of taxon-specific template DNA prior to PCR, given the abundance of DNA sequences recovered post-PCR-and-sequencing, a critical step in the chain of eDNA inference. While we focus on the use of eDNA samples to determine the relative abundance of taxa within a community, our approach also applies to single-taxon applications (including applications using qPCR), studies of diversity, and studies focused on occurrence. By grounding inferences about eDNA community composition in a rigorous statistical framework, and by making these inferences explicit, we hope to improve the inferential potential for the emerging field of community-level eDNA analysis. |
doi_str_mv | 10.1890/15-1733.1 |
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As such, eDNA is a potentially rich source of data for basic ecology, conservation, and management, because it offers the prospect of quantitatively reconstructing whole ecological communities from easily obtained samples. However, like all sampling methods, eDNA sequencing is subject to methodological limitations that can generate biased descriptions of ecological communities. Here, we demonstrate parallels between eDNA sampling and traditional sampling techniques, and use these parallels to offer a statistical structure for framing the challenges faced by eDNA and for illuminating the gaps in our current knowledge. Although the current state of knowledge on some of these steps precludes a full estimate of biomass for each taxon in a sampled eDNA community, we provide a map that illustrates potential methods for bridging these gaps. Additionally, we use an original data set to estimate the relative abundances of taxon-specific template DNA prior to PCR, given the abundance of DNA sequences recovered post-PCR-and-sequencing, a critical step in the chain of eDNA inference. While we focus on the use of eDNA samples to determine the relative abundance of taxa within a community, our approach also applies to single-taxon applications (including applications using qPCR), studies of diversity, and studies focused on occurrence. 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As such, eDNA is a potentially rich source of data for basic ecology, conservation, and management, because it offers the prospect of quantitatively reconstructing whole ecological communities from easily obtained samples. However, like all sampling methods, eDNA sequencing is subject to methodological limitations that can generate biased descriptions of ecological communities. Here, we demonstrate parallels between eDNA sampling and traditional sampling techniques, and use these parallels to offer a statistical structure for framing the challenges faced by eDNA and for illuminating the gaps in our current knowledge. Although the current state of knowledge on some of these steps precludes a full estimate of biomass for each taxon in a sampled eDNA community, we provide a map that illustrates potential methods for bridging these gaps. Additionally, we use an original data set to estimate the relative abundances of taxon-specific template DNA prior to PCR, given the abundance of DNA sequences recovered post-PCR-and-sequencing, a critical step in the chain of eDNA inference. While we focus on the use of eDNA samples to determine the relative abundance of taxa within a community, our approach also applies to single-taxon applications (including applications using qPCR), studies of diversity, and studies focused on occurrence. By grounding inferences about eDNA community composition in a rigorous statistical framework, and by making these inferences explicit, we hope to improve the inferential potential for the emerging field of community-level eDNA analysis.</description><subject>Animals</subject><subject>Bayesian statistics</subject><subject>Biomass</subject><subject>community surveys</subject><subject>DNA - genetics</subject><subject>ecosystem assessment</subject><subject>environmental DNA</subject><subject>Fishes</subject><subject>Invertebrates</subject><subject>Metagenomics</subject><subject>Models, Biological</subject><subject>multinomial‐Poisson transformation</subject><subject>quantitative PCR</subject><subject>Seawater</subject><issn>1051-0761</issn><issn>1939-5582</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkD1PwzAQhi0EolAY-AGgjDCk-OzYScaolIJUAQPMVj7syiWJi51Q9d_jKgUmJLyc5Xvu0flF6ALwBJIU3wILIaZ0AgfoBFKahowl5NDfMYMQxxxG6NS5FfaHEHKMRiSOGeNpcoLmWaBs3siNse-BMjbQrZLW6nYZFNrUZqnLvA5K0zR9qzstncdNE8j2U1vTNrLtfPvuKTtDRyqvnTzf1zF6u5-9Th_CxfP8cZotwjKKGA-rghWKAUCpeKFiGuG0SBTJGSf-gVaAC0rKivtPgFJ5BTxOUkUgIYpEJU3pGF0P3rU1H710nWi0K2Vd5600vROQUBZFHCj9B0q8nAPGHr0Z0NIa56xUYm11k9utACx2EQtgYhexAM9e7bV90cjqh_zO1AOTAdjoWm7_NolZ9uL35H7gchhYuc7YX2GU-BUxpV9oeoxO</recordid><startdate>20160901</startdate><enddate>20160901</enddate><creator>Shelton, Andrew Olaf</creator><creator>O'Donnell, James Lawrence</creator><creator>Samhouri, Jameal F.</creator><creator>Lowell, Natalie</creator><creator>Williams, Gregory D.</creator><creator>Kelly, Ryan P.</creator><general>Ecological Society of America</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SN</scope><scope>7ST</scope><scope>7TM</scope><scope>C1K</scope><scope>SOI</scope><scope>7X8</scope></search><sort><creationdate>20160901</creationdate><title>A framework for inferring biological communities from environmental DNA</title><author>Shelton, Andrew Olaf ; O'Donnell, James Lawrence ; Samhouri, Jameal F. ; Lowell, Natalie ; Williams, Gregory D. ; Kelly, Ryan P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4456-db5bf5111cf6bf73409b8f2a562f6b3d10b32cd69391ffad16789f2182f24c393</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Animals</topic><topic>Bayesian statistics</topic><topic>Biomass</topic><topic>community surveys</topic><topic>DNA - genetics</topic><topic>ecosystem assessment</topic><topic>environmental DNA</topic><topic>Fishes</topic><topic>Invertebrates</topic><topic>Metagenomics</topic><topic>Models, Biological</topic><topic>multinomial‐Poisson transformation</topic><topic>quantitative PCR</topic><topic>Seawater</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Shelton, Andrew Olaf</creatorcontrib><creatorcontrib>O'Donnell, James Lawrence</creatorcontrib><creatorcontrib>Samhouri, Jameal F.</creatorcontrib><creatorcontrib>Lowell, Natalie</creatorcontrib><creatorcontrib>Williams, Gregory D.</creatorcontrib><creatorcontrib>Kelly, Ryan P.</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Ecology Abstracts</collection><collection>Environment Abstracts</collection><collection>Nucleic Acids Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Ecological applications</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Shelton, Andrew Olaf</au><au>O'Donnell, James Lawrence</au><au>Samhouri, Jameal F.</au><au>Lowell, Natalie</au><au>Williams, Gregory D.</au><au>Kelly, Ryan P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A framework for inferring biological communities from environmental DNA</atitle><jtitle>Ecological applications</jtitle><addtitle>Ecol Appl</addtitle><date>2016-09-01</date><risdate>2016</risdate><volume>26</volume><issue>6</issue><spage>1645</spage><epage>1659</epage><pages>1645-1659</pages><issn>1051-0761</issn><eissn>1939-5582</eissn><abstract>Environmental DNA (eDNA), genetic material recovered from an environmental medium such as soil, water, or feces, reflects the membership of the ecological community present in the sampled environment. 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Additionally, we use an original data set to estimate the relative abundances of taxon-specific template DNA prior to PCR, given the abundance of DNA sequences recovered post-PCR-and-sequencing, a critical step in the chain of eDNA inference. While we focus on the use of eDNA samples to determine the relative abundance of taxa within a community, our approach also applies to single-taxon applications (including applications using qPCR), studies of diversity, and studies focused on occurrence. By grounding inferences about eDNA community composition in a rigorous statistical framework, and by making these inferences explicit, we hope to improve the inferential potential for the emerging field of community-level eDNA analysis.</abstract><cop>United States</cop><pub>Ecological Society of America</pub><pmid>27755698</pmid><doi>10.1890/15-1733.1</doi><tpages>15</tpages></addata></record> |
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subjects | Animals Bayesian statistics Biomass community surveys DNA - genetics ecosystem assessment environmental DNA Fishes Invertebrates Metagenomics Models, Biological multinomial‐Poisson transformation quantitative PCR Seawater |
title | A framework for inferring biological communities from environmental DNA |
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