Water volume reduction increases eutrophication risk in tropical semi-arid reservoirs
Autor(a) principal: | |
---|---|
Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRN |
Texto Completo: | https://repositorio.ufrn.br/handle/123456789/30856 |
Resumo: | Global patterns of temperature and precipitation have significantly changed over the last century and nearly all predictions point to even greater changes by the end of 2100. Long periods of drought in semi-arid regions generally reduce reservoirs and lakes water level, increasing the nutrients concentrations in the water. Our principal hypothesis is that water volume reduction, driven by prolonged droughts, will increase reservoirs susceptibility to eutrophication and accordingly an increase in trophic state. To test this hypothesis, we used a comparative analysis of ecosystems in a space-for-time substitution approach, in a Brazilian semi-arid region, to predict the consequences of reservoirs water volume reduction on key limnological variables. Methods: We sampled 16 reservoirs located in two sub-basins with contrasting rainfall regimes, inserted on Piranhas-Açu watershed. The Seridó River basin (SB) is dry and the Piancó River basin (SB) is humid, with annual mean precipitation of 500 and 700 mm, respectively. Linear regressions analyzes were performed to assess whether the percentage of maximum volume stored (%MVS) is a good predictor for total phosphorus (TP), total nitrogen (TN) and chlorophyll-a (CHLA). In addition, a two factorial analysis of variance (two-way ANOVA) was performed to test for period (dry, very dry and extremely dry), basin (SB and PB) and their interactions effects on TP, TN, CHLA, conductivity, turbidity, and Secchi depth. Results: The results showed a reduction in the reservoirs %MVS both for PB and SB regions. At the extremely dry period, all reservoirs were classified as eutrophic, but TP concentrations reached much higher values in SB than in PB. The linear regressions analyses showed that the TP and TN were negatively related to %MVS during all periods sampled. The two-way ANOVA showed that there were significant basin and period effects on TP, TN, Secchi depth and turbidity, whereas for CHLA and conductivity only basin effects were observed. In addition, we found significant interaction effects between period and basin on TP, TN and turbidity. Conclusions: We conclude that the contrasting levels of rainfall observed between the two basins affect the water quality and trophic state of the reservoirs and these effects are magnified by water volume reduction. Therefore, our findings might help to predict the consequences of rainfall reductions on freshwater ecosystems of Brazilian drylands |
id |
UFRN_6b808205662c075b30fb98d1200b2595 |
---|---|
oai_identifier_str |
oai:https://repositorio.ufrn.br:123456789/30856 |
network_acronym_str |
UFRN |
network_name_str |
Repositório Institucional da UFRN |
repository_id_str |
|
spelling |
Becker, VanessaRocha Junior, Carlos Alberto Nascimento daCosta, Mariana Rodrigues Amaral daMenezes, Rosemberg FernandesAttayde, José Luiz2020-12-07T13:33:43Z2020-12-07T13:33:43Z2018-04-05ROCHA JUNIOR, Carlos Alberto Nascimento da; COSTA, Mariana Rodrigues Amaral da; MENEZES, Rosemberg Fernandes; ATTAYDE, José Luiz; BECKER, Vanessa. Water volume reduction increases eutrophication risk in tropical semi-arid reservoirs. Acta Limnologica Brasiliensia, [S.L.], v. 30, p. 1-10, 5 abr. 2018. FapUNIFESP (SciELO). Disponível em <https://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2018000100802&lng=en&tlng=en>. Acesso em 20 out 2020.http://dx.doi.org/10.1590/s2179-975x2117.2179-975Xhttps://repositorio.ufrn.br/handle/123456789/3085610.1590/S2179-975X2117Associação Brasileira de LimnologiaAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessDroughtClimate changePhosphorousWater shortageWater qualityWater volume reduction increases eutrophication risk in tropical semi-arid reservoirsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleGlobal patterns of temperature and precipitation have significantly changed over the last century and nearly all predictions point to even greater changes by the end of 2100. Long periods of drought in semi-arid regions generally reduce reservoirs and lakes water level, increasing the nutrients concentrations in the water. Our principal hypothesis is that water volume reduction, driven by prolonged droughts, will increase reservoirs susceptibility to eutrophication and accordingly an increase in trophic state. To test this hypothesis, we used a comparative analysis of ecosystems in a space-for-time substitution approach, in a Brazilian semi-arid region, to predict the consequences of reservoirs water volume reduction on key limnological variables. Methods: We sampled 16 reservoirs located in two sub-basins with contrasting rainfall regimes, inserted on Piranhas-Açu watershed. The Seridó River basin (SB) is dry and the Piancó River basin (SB) is humid, with annual mean precipitation of 500 and 700 mm, respectively. Linear regressions analyzes were performed to assess whether the percentage of maximum volume stored (%MVS) is a good predictor for total phosphorus (TP), total nitrogen (TN) and chlorophyll-a (CHLA). In addition, a two factorial analysis of variance (two-way ANOVA) was performed to test for period (dry, very dry and extremely dry), basin (SB and PB) and their interactions effects on TP, TN, CHLA, conductivity, turbidity, and Secchi depth. Results: The results showed a reduction in the reservoirs %MVS both for PB and SB regions. At the extremely dry period, all reservoirs were classified as eutrophic, but TP concentrations reached much higher values in SB than in PB. The linear regressions analyses showed that the TP and TN were negatively related to %MVS during all periods sampled. The two-way ANOVA showed that there were significant basin and period effects on TP, TN, Secchi depth and turbidity, whereas for CHLA and conductivity only basin effects were observed. In addition, we found significant interaction effects between period and basin on TP, TN and turbidity. Conclusions: We conclude that the contrasting levels of rainfall observed between the two basins affect the water quality and trophic state of the reservoirs and these effects are magnified by water volume reduction. Therefore, our findings might help to predict the consequences of rainfall reductions on freshwater ecosystems of Brazilian drylandsengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALWaterVolumeReductionIncreases_Becker_2018.pdfWaterVolumeReductionIncreases_Becker_2018.pdfapplication/pdf1550453https://repositorio.ufrn.br/bitstream/123456789/30856/1/WaterVolumeReductionIncreases_Becker_2018.pdff4ea5c6db0fff036d86ce2c5fb108b35MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/30856/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/30856/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53TEXTWaterVolumeReductionIncreases_Becker_2018.pdf.txtWaterVolumeReductionIncreases_Becker_2018.pdf.txtExtracted texttext/plain35516https://repositorio.ufrn.br/bitstream/123456789/30856/4/WaterVolumeReductionIncreases_Becker_2018.pdf.txt1f03a0a461555fe40f8e8f4faa1867e4MD54THUMBNAILWaterVolumeReductionIncreases_Becker_2018.pdf.jpgWaterVolumeReductionIncreases_Becker_2018.pdf.jpgGenerated Thumbnailimage/jpeg1686https://repositorio.ufrn.br/bitstream/123456789/30856/5/WaterVolumeReductionIncreases_Becker_2018.pdf.jpgb6653a3f88a4f1f219bf86eff02be3a3MD55123456789/308562020-12-13 05:01:15.17oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2020-12-13T08:01:15Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.pt_BR.fl_str_mv |
Water volume reduction increases eutrophication risk in tropical semi-arid reservoirs |
title |
Water volume reduction increases eutrophication risk in tropical semi-arid reservoirs |
spellingShingle |
Water volume reduction increases eutrophication risk in tropical semi-arid reservoirs Becker, Vanessa Drought Climate change Phosphorous Water shortage Water quality |
title_short |
Water volume reduction increases eutrophication risk in tropical semi-arid reservoirs |
title_full |
Water volume reduction increases eutrophication risk in tropical semi-arid reservoirs |
title_fullStr |
Water volume reduction increases eutrophication risk in tropical semi-arid reservoirs |
title_full_unstemmed |
Water volume reduction increases eutrophication risk in tropical semi-arid reservoirs |
title_sort |
Water volume reduction increases eutrophication risk in tropical semi-arid reservoirs |
author |
Becker, Vanessa |
author_facet |
Becker, Vanessa Rocha Junior, Carlos Alberto Nascimento da Costa, Mariana Rodrigues Amaral da Menezes, Rosemberg Fernandes Attayde, José Luiz |
author_role |
author |
author2 |
Rocha Junior, Carlos Alberto Nascimento da Costa, Mariana Rodrigues Amaral da Menezes, Rosemberg Fernandes Attayde, José Luiz |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Becker, Vanessa Rocha Junior, Carlos Alberto Nascimento da Costa, Mariana Rodrigues Amaral da Menezes, Rosemberg Fernandes Attayde, José Luiz |
dc.subject.por.fl_str_mv |
Drought Climate change Phosphorous Water shortage Water quality |
topic |
Drought Climate change Phosphorous Water shortage Water quality |
description |
Global patterns of temperature and precipitation have significantly changed over the last century and nearly all predictions point to even greater changes by the end of 2100. Long periods of drought in semi-arid regions generally reduce reservoirs and lakes water level, increasing the nutrients concentrations in the water. Our principal hypothesis is that water volume reduction, driven by prolonged droughts, will increase reservoirs susceptibility to eutrophication and accordingly an increase in trophic state. To test this hypothesis, we used a comparative analysis of ecosystems in a space-for-time substitution approach, in a Brazilian semi-arid region, to predict the consequences of reservoirs water volume reduction on key limnological variables. Methods: We sampled 16 reservoirs located in two sub-basins with contrasting rainfall regimes, inserted on Piranhas-Açu watershed. The Seridó River basin (SB) is dry and the Piancó River basin (SB) is humid, with annual mean precipitation of 500 and 700 mm, respectively. Linear regressions analyzes were performed to assess whether the percentage of maximum volume stored (%MVS) is a good predictor for total phosphorus (TP), total nitrogen (TN) and chlorophyll-a (CHLA). In addition, a two factorial analysis of variance (two-way ANOVA) was performed to test for period (dry, very dry and extremely dry), basin (SB and PB) and their interactions effects on TP, TN, CHLA, conductivity, turbidity, and Secchi depth. Results: The results showed a reduction in the reservoirs %MVS both for PB and SB regions. At the extremely dry period, all reservoirs were classified as eutrophic, but TP concentrations reached much higher values in SB than in PB. The linear regressions analyses showed that the TP and TN were negatively related to %MVS during all periods sampled. The two-way ANOVA showed that there were significant basin and period effects on TP, TN, Secchi depth and turbidity, whereas for CHLA and conductivity only basin effects were observed. In addition, we found significant interaction effects between period and basin on TP, TN and turbidity. Conclusions: We conclude that the contrasting levels of rainfall observed between the two basins affect the water quality and trophic state of the reservoirs and these effects are magnified by water volume reduction. Therefore, our findings might help to predict the consequences of rainfall reductions on freshwater ecosystems of Brazilian drylands |
publishDate |
2018 |
dc.date.issued.fl_str_mv |
2018-04-05 |
dc.date.accessioned.fl_str_mv |
2020-12-07T13:33:43Z |
dc.date.available.fl_str_mv |
2020-12-07T13:33:43Z |
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.citation.fl_str_mv |
ROCHA JUNIOR, Carlos Alberto Nascimento da; COSTA, Mariana Rodrigues Amaral da; MENEZES, Rosemberg Fernandes; ATTAYDE, José Luiz; BECKER, Vanessa. Water volume reduction increases eutrophication risk in tropical semi-arid reservoirs. Acta Limnologica Brasiliensia, [S.L.], v. 30, p. 1-10, 5 abr. 2018. FapUNIFESP (SciELO). Disponível em <https://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2018000100802&lng=en&tlng=en>. Acesso em 20 out 2020.http://dx.doi.org/10.1590/s2179-975x2117. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/handle/123456789/30856 |
dc.identifier.issn.none.fl_str_mv |
2179-975X |
dc.identifier.doi.none.fl_str_mv |
10.1590/S2179-975X2117 |
identifier_str_mv |
ROCHA JUNIOR, Carlos Alberto Nascimento da; COSTA, Mariana Rodrigues Amaral da; MENEZES, Rosemberg Fernandes; ATTAYDE, José Luiz; BECKER, Vanessa. Water volume reduction increases eutrophication risk in tropical semi-arid reservoirs. Acta Limnologica Brasiliensia, [S.L.], v. 30, p. 1-10, 5 abr. 2018. FapUNIFESP (SciELO). Disponível em <https://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2018000100802&lng=en&tlng=en>. Acesso em 20 out 2020.http://dx.doi.org/10.1590/s2179-975x2117. 2179-975X 10.1590/S2179-975X2117 |
url |
https://repositorio.ufrn.br/handle/123456789/30856 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Limnologia |
publisher.none.fl_str_mv |
Associação Brasileira de Limnologia |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRN instname:Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN |
instname_str |
Universidade Federal do Rio Grande do Norte (UFRN) |
instacron_str |
UFRN |
institution |
UFRN |
reponame_str |
Repositório Institucional da UFRN |
collection |
Repositório Institucional da UFRN |
bitstream.url.fl_str_mv |
https://repositorio.ufrn.br/bitstream/123456789/30856/1/WaterVolumeReductionIncreases_Becker_2018.pdf https://repositorio.ufrn.br/bitstream/123456789/30856/2/license_rdf https://repositorio.ufrn.br/bitstream/123456789/30856/3/license.txt https://repositorio.ufrn.br/bitstream/123456789/30856/4/WaterVolumeReductionIncreases_Becker_2018.pdf.txt https://repositorio.ufrn.br/bitstream/123456789/30856/5/WaterVolumeReductionIncreases_Becker_2018.pdf.jpg |
bitstream.checksum.fl_str_mv |
f4ea5c6db0fff036d86ce2c5fb108b35 4d2950bda3d176f570a9f8b328dfbbef e9597aa2854d128fd968be5edc8a28d9 1f03a0a461555fe40f8e8f4faa1867e4 b6653a3f88a4f1f219bf86eff02be3a3 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN) |
repository.mail.fl_str_mv |
|
_version_ |
1802117663649955840 |