Benthic diatom community dynamics in Mediterranean intermittent streams: Effects of water availability and their potential as indicators of dry-phase ecological status
Autor(a) principal: | |
---|---|
Data de Publicação: | 2020 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/28959 https://doi.org/10.1016/j.scitotenv.2020.137462 |
Resumo: | The study of intermittent rivers is a critical and timely issue due to theirworldwide increase, triggered by several causes including climate change. The need to understand the response of intermittent river biota to water intermittency led us to conduct this study using benthic diatoms collected in southern Portugal. Benthic diatomswere explored in terms of assemblages, diversity indices, the Specific Pollution Sensitivity (SPI) Index, functional metrics (i.e. ecological guilds and life-forms) and conservation status. We verified that changes in water physicochemical characteristics were highly controlled by flow intermittency, which in turn is directly linked tometeorological variables (air temperature and precipitation). Changes in diatomassemblages reflect the aquatic regime of sites, changes in aquatic states through time and mesohabitats (dry biofilm, samples collected in pools or under flowing conditions). Species richness, on the other hand, did not reflect these differences, whilst Shannon diversity and Pielou's Evenness indices only reflected mesohabitat differences. The SPI distinguished sampling periods, and mesohabitats. The relative abundance of ecological guilds changed with aquatic states, with the low-profile guild dominating in eurheic and arheic conditions (except during Summer), being replaced bymotile taxa in summer arheic conditions, reflecting increases in nutrient and siltation. The hypothesis that benthic diatom assemblages in dry biofilm can be used as an indicator of ecological status during the dry-phase was validated, since no differences between the Ecological Quality Ratio determined in dry biofilm collected in Summer 2017 and the previous Spring 2017 in flowing water. A method is proposed for diatom sampling in dry biofilm, contributing to an integrated ecological status evaluation, which considers the dry-phase and enhances the reach of biomonitoring programs. |
id |
RCAP_6c3613321e514503e7ddc76cb3b1a655 |
---|---|
oai_identifier_str |
oai:dspace.uevora.pt:10174/28959 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Benthic diatom community dynamics in Mediterranean intermittent streams: Effects of water availability and their potential as indicators of dry-phase ecological statusAquatic regimeAquatic statesDry biofilmEcological guildsEcological status assessmentWFD typologyThe study of intermittent rivers is a critical and timely issue due to theirworldwide increase, triggered by several causes including climate change. The need to understand the response of intermittent river biota to water intermittency led us to conduct this study using benthic diatoms collected in southern Portugal. Benthic diatomswere explored in terms of assemblages, diversity indices, the Specific Pollution Sensitivity (SPI) Index, functional metrics (i.e. ecological guilds and life-forms) and conservation status. We verified that changes in water physicochemical characteristics were highly controlled by flow intermittency, which in turn is directly linked tometeorological variables (air temperature and precipitation). Changes in diatomassemblages reflect the aquatic regime of sites, changes in aquatic states through time and mesohabitats (dry biofilm, samples collected in pools or under flowing conditions). Species richness, on the other hand, did not reflect these differences, whilst Shannon diversity and Pielou's Evenness indices only reflected mesohabitat differences. The SPI distinguished sampling periods, and mesohabitats. The relative abundance of ecological guilds changed with aquatic states, with the low-profile guild dominating in eurheic and arheic conditions (except during Summer), being replaced bymotile taxa in summer arheic conditions, reflecting increases in nutrient and siltation. The hypothesis that benthic diatom assemblages in dry biofilm can be used as an indicator of ecological status during the dry-phase was validated, since no differences between the Ecological Quality Ratio determined in dry biofilm collected in Summer 2017 and the previous Spring 2017 in flowing water. A method is proposed for diatom sampling in dry biofilm, contributing to an integrated ecological status evaluation, which considers the dry-phase and enhances the reach of biomonitoring programs.European Union through the European Regional Development Fund, included in the COMPETE 2020 (Operational Program Competitiveness and Internationalization) through the ALOP (ALT20-03-0145-FEDER-000004) project and the ICT project (UIDB/04683/2020) with the reference POCI-01-0145-FEDER 007690, and by the Science andManagement of Intermittent Rivers & Ephemeral Streams (SMIRES) COST Action (CA15113), http://www.smires.eu/Elsevier2021-01-28T22:38:31Z2021-01-282020-02-20T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/28959http://hdl.handle.net/10174/28959https://doi.org/10.1016/j.scitotenv.2020.137462engNovais M.H., Morales E.A., Marchã Penha A., Potes M., Bouchez A., Barthès A., Costa M.J., Salgado R., Santos J. & M. Morais (2020). Benthic diatom community dynamics in Mediterranean intermittent streams: Effects of water availability and their potential as indicators of dry-phase ecological status. Science of the Total Environment 719: 137462hnovais@uevora.ptmorales@uevora.ptmapenha@uevora.ptmpotes@uevora.ptagnes.bouchez@inra.frAmelieBarthes@eurofins.commjcosta@uevora.ptrsal@uevora.ptjmas@uevora.ptmmorais@uevora.pt221Novais, Maria HelenaMorales, EduardoMarchã Penha, AlexandraPotes, MiguelBouchez, AgnèsBarthès, AmélieCosta, Maria JoãoSalgado, RuiSantos, JorgeMorais, Manuelainfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T19:25:47Zoai:dspace.uevora.pt:10174/28959Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:18:47.788444Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Benthic diatom community dynamics in Mediterranean intermittent streams: Effects of water availability and their potential as indicators of dry-phase ecological status |
title |
Benthic diatom community dynamics in Mediterranean intermittent streams: Effects of water availability and their potential as indicators of dry-phase ecological status |
spellingShingle |
Benthic diatom community dynamics in Mediterranean intermittent streams: Effects of water availability and their potential as indicators of dry-phase ecological status Novais, Maria Helena Aquatic regime Aquatic states Dry biofilm Ecological guilds Ecological status assessment WFD typology |
title_short |
Benthic diatom community dynamics in Mediterranean intermittent streams: Effects of water availability and their potential as indicators of dry-phase ecological status |
title_full |
Benthic diatom community dynamics in Mediterranean intermittent streams: Effects of water availability and their potential as indicators of dry-phase ecological status |
title_fullStr |
Benthic diatom community dynamics in Mediterranean intermittent streams: Effects of water availability and their potential as indicators of dry-phase ecological status |
title_full_unstemmed |
Benthic diatom community dynamics in Mediterranean intermittent streams: Effects of water availability and their potential as indicators of dry-phase ecological status |
title_sort |
Benthic diatom community dynamics in Mediterranean intermittent streams: Effects of water availability and their potential as indicators of dry-phase ecological status |
author |
Novais, Maria Helena |
author_facet |
Novais, Maria Helena Morales, Eduardo Marchã Penha, Alexandra Potes, Miguel Bouchez, Agnès Barthès, Amélie Costa, Maria João Salgado, Rui Santos, Jorge Morais, Manuela |
author_role |
author |
author2 |
Morales, Eduardo Marchã Penha, Alexandra Potes, Miguel Bouchez, Agnès Barthès, Amélie Costa, Maria João Salgado, Rui Santos, Jorge Morais, Manuela |
author2_role |
author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Novais, Maria Helena Morales, Eduardo Marchã Penha, Alexandra Potes, Miguel Bouchez, Agnès Barthès, Amélie Costa, Maria João Salgado, Rui Santos, Jorge Morais, Manuela |
dc.subject.por.fl_str_mv |
Aquatic regime Aquatic states Dry biofilm Ecological guilds Ecological status assessment WFD typology |
topic |
Aquatic regime Aquatic states Dry biofilm Ecological guilds Ecological status assessment WFD typology |
description |
The study of intermittent rivers is a critical and timely issue due to theirworldwide increase, triggered by several causes including climate change. The need to understand the response of intermittent river biota to water intermittency led us to conduct this study using benthic diatoms collected in southern Portugal. Benthic diatomswere explored in terms of assemblages, diversity indices, the Specific Pollution Sensitivity (SPI) Index, functional metrics (i.e. ecological guilds and life-forms) and conservation status. We verified that changes in water physicochemical characteristics were highly controlled by flow intermittency, which in turn is directly linked tometeorological variables (air temperature and precipitation). Changes in diatomassemblages reflect the aquatic regime of sites, changes in aquatic states through time and mesohabitats (dry biofilm, samples collected in pools or under flowing conditions). Species richness, on the other hand, did not reflect these differences, whilst Shannon diversity and Pielou's Evenness indices only reflected mesohabitat differences. The SPI distinguished sampling periods, and mesohabitats. The relative abundance of ecological guilds changed with aquatic states, with the low-profile guild dominating in eurheic and arheic conditions (except during Summer), being replaced bymotile taxa in summer arheic conditions, reflecting increases in nutrient and siltation. The hypothesis that benthic diatom assemblages in dry biofilm can be used as an indicator of ecological status during the dry-phase was validated, since no differences between the Ecological Quality Ratio determined in dry biofilm collected in Summer 2017 and the previous Spring 2017 in flowing water. A method is proposed for diatom sampling in dry biofilm, contributing to an integrated ecological status evaluation, which considers the dry-phase and enhances the reach of biomonitoring programs. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-02-20T00:00:00Z 2021-01-28T22:38:31Z 2021-01-28 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10174/28959 http://hdl.handle.net/10174/28959 https://doi.org/10.1016/j.scitotenv.2020.137462 |
url |
http://hdl.handle.net/10174/28959 https://doi.org/10.1016/j.scitotenv.2020.137462 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Novais M.H., Morales E.A., Marchã Penha A., Potes M., Bouchez A., Barthès A., Costa M.J., Salgado R., Santos J. & M. Morais (2020). Benthic diatom community dynamics in Mediterranean intermittent streams: Effects of water availability and their potential as indicators of dry-phase ecological status. Science of the Total Environment 719: 137462 hnovais@uevora.pt morales@uevora.pt mapenha@uevora.pt mpotes@uevora.pt agnes.bouchez@inra.fr AmelieBarthes@eurofins.com mjcosta@uevora.pt rsal@uevora.pt jmas@uevora.pt mmorais@uevora.pt 221 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
_version_ |
1799136669876617216 |