Chemical and optical properties of leachates from different riparian particulate organic matter sources influence instream microbial activity

The release of soluble compounds (i.e., leachates) from allochthonous coarse particulate organic matter (CPOM) into stream water can be an important source of dissolved organic matter (DOM) and nutrients for instream microbial activity. Here, we assessed variability in the chemistry and the composit...

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Detalles Bibliográficos
Autores: Bastias, Elliot, Ribot, Miquel, Jonsson, Micael, Sabater, Francesc, Martí, Eugènia
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/222113
Acceso en línea:http://hdl.handle.net/10261/222113
Access Level:acceso abierto
Palabra clave:Stream
Riparian leaf litter
Dissolved organic matter
Bacterial activity
Resazurin–Resorufin (Raz–Rru)
Chemical systems
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spelling Chemical and optical properties of leachates from different riparian particulate organic matter sources influence instream microbial activityBastias, ElliotRibot, MiquelJonsson, MicaelSabater, FrancescMartí, EugèniaStreamRiparian leaf litterDissolved organic matterBacterial activityResazurin–Resorufin (Raz–Rru)Chemical systemsThe release of soluble compounds (i.e., leachates) from allochthonous coarse particulate organic matter (CPOM) into stream water can be an important source of dissolved organic matter (DOM) and nutrients for instream microbial activity. Here, we assessed variability in the chemistry and the composition of DOM of leachates from different CPOM sources and examined how these characteristics influenced the activity of microbial assemblages in streams. Specifically, we considered leaf litter from 6 tree species that are broadly distributed in riparian zones of the Mediterranean region, a mixture of fruits from some of these species, and a mixture of twigs. We analyzed the leachates from each CPOM source for the concentration of dissolved forms of carbon, nitrogen, and phosphorus, as well as for the composition of DOM based on optical indices associated with the degree of aromaticity and molecular weight. Under laboratory conditions, we used the Resazurin–Resorufin system to estimate the microbial metabolic activity associated with each leachate type. Microbial metabolic activity varied among leachates from different CPOM sources and was positively related to the degree of aromaticity and the NO3– concentration of leachates. Hence, certain types of riparian CPOM inputs can constitute sources of high-quality DOM and dissolved nutrients for instream microbial assemblages. Thus, management of riparian vegetation should consider variation in leachate properties among plant species, as they can influence dissolved organic carbon and nutrient dynamics and heterotrophic activity in stream ecosystems.Peer reviewedUniversity of Chicago PressConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/222113reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1086/711709Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2221132026-05-22T06:33:51Z
dc.title.none.fl_str_mv Chemical and optical properties of leachates from different riparian particulate organic matter sources influence instream microbial activity
title Chemical and optical properties of leachates from different riparian particulate organic matter sources influence instream microbial activity
spellingShingle Chemical and optical properties of leachates from different riparian particulate organic matter sources influence instream microbial activity
Bastias, Elliot
Stream
Riparian leaf litter
Dissolved organic matter
Bacterial activity
Resazurin–Resorufin (Raz–Rru)
Chemical systems
title_short Chemical and optical properties of leachates from different riparian particulate organic matter sources influence instream microbial activity
title_full Chemical and optical properties of leachates from different riparian particulate organic matter sources influence instream microbial activity
title_fullStr Chemical and optical properties of leachates from different riparian particulate organic matter sources influence instream microbial activity
title_full_unstemmed Chemical and optical properties of leachates from different riparian particulate organic matter sources influence instream microbial activity
title_sort Chemical and optical properties of leachates from different riparian particulate organic matter sources influence instream microbial activity
dc.creator.none.fl_str_mv Bastias, Elliot
Ribot, Miquel
Jonsson, Micael
Sabater, Francesc
Martí, Eugènia
author Bastias, Elliot
author_facet Bastias, Elliot
Ribot, Miquel
Jonsson, Micael
Sabater, Francesc
Martí, Eugènia
author_role author
author2 Ribot, Miquel
Jonsson, Micael
Sabater, Francesc
Martí, Eugènia
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Stream
Riparian leaf litter
Dissolved organic matter
Bacterial activity
Resazurin–Resorufin (Raz–Rru)
Chemical systems
topic Stream
Riparian leaf litter
Dissolved organic matter
Bacterial activity
Resazurin–Resorufin (Raz–Rru)
Chemical systems
description The release of soluble compounds (i.e., leachates) from allochthonous coarse particulate organic matter (CPOM) into stream water can be an important source of dissolved organic matter (DOM) and nutrients for instream microbial activity. Here, we assessed variability in the chemistry and the composition of DOM of leachates from different CPOM sources and examined how these characteristics influenced the activity of microbial assemblages in streams. Specifically, we considered leaf litter from 6 tree species that are broadly distributed in riparian zones of the Mediterranean region, a mixture of fruits from some of these species, and a mixture of twigs. We analyzed the leachates from each CPOM source for the concentration of dissolved forms of carbon, nitrogen, and phosphorus, as well as for the composition of DOM based on optical indices associated with the degree of aromaticity and molecular weight. Under laboratory conditions, we used the Resazurin–Resorufin system to estimate the microbial metabolic activity associated with each leachate type. Microbial metabolic activity varied among leachates from different CPOM sources and was positively related to the degree of aromaticity and the NO3– concentration of leachates. Hence, certain types of riparian CPOM inputs can constitute sources of high-quality DOM and dissolved nutrients for instream microbial assemblages. Thus, management of riparian vegetation should consider variation in leachate properties among plant species, as they can influence dissolved organic carbon and nutrient dynamics and heterotrophic activity in stream ecosystems.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/222113
url http://hdl.handle.net/10261/222113
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1086/711709
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv University of Chicago Press
publisher.none.fl_str_mv University of Chicago Press
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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