Nutrification impacts on coral reefs from northern Bahia, Brazil

Bibliographic Details
Main Author: Costa Júnior, O. S.
Publication Date: 2000
Other Authors: Leão, Zelinda Margarida de Andrade Nery, Nimmo, M., Attrill, Martin John
Format: Article
Language: eng
Source: Repositório Institucional da UFBA
Download full: http://www.repositorio.ufba.br/ri/handle/ri/7253
Summary: p.307-315
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spelling Costa Júnior, O. S.Leão, Zelinda Margarida de Andrade NeryNimmo, M.Attrill, Martin JohnCosta Júnior, O. S.Leão, Zelinda Margarida de Andrade NeryNimmo, M.Attrill, Martin John2012-11-20T20:32:41Z20000018-8158http://www.repositorio.ufba.br/ri/handle/ri/7253v. 440, n. 1-3p.307-315Coral reefs extend for 20 km along the north coast of the state of Bahia, Brazil. Over the last 15 years, this region has experienced an acceleration of generally unplanned urbanisation, with the irregular and indiscriminate use of septic tanks in urban centres contaminating the groundwater. This infiltration of nutrients and pathogens is facilitated by both the soil permeability and an accented hydraulic head, which eventually leads to the percolation of nutrient-rich groundwater seaward to the reefs. The groundwater nutrient concentrations (nitrate, nitrite, ammonia, phosphate and silicate) from Guarajuba beach (a highly urbanised area) are over 10 times higher than groundwater from Papa Gente beach, an area of low human occupation. The pH values of the groundwater samples also indicate the predominance of reducing conditions in Guarajuba, due to the high availability of organic matter and consequent bacterial activity. Additionally, faecal coliform data indicate domestic wastewater as the source of groundwater contamination. High densities of macroalgae and heterotrophic organisms on the impacted reefs, as well as higher concentrations of nutrients, evoke the effects of eutrophication on this coral reef ecosystem. These data suggest that the high availability of nutrients is affecting the trophic structure in the study area, especially in Guarajuba, with the increased turf and macroalgae growth reducing light penetration to the coral colonies, competing with them for space and inhibiting the settlement of new coral larvae.Submitted by Texeira Ana (atanateixeira@gmail.com) on 2012-11-20T20:32:41Z No. of bitstreams: 1 Leão.pdf: 147993 bytes, checksum: 6267c1aa03da9780a6dd4f4c0d0fe29c (MD5)Made available in DSpace on 2012-11-20T20:32:41Z (GMT). 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dc.title.pt_BR.fl_str_mv Nutrification impacts on coral reefs from northern Bahia, Brazil
dc.title.alternative.pt_BR.fl_str_mv Hydrobiologia
title Nutrification impacts on coral reefs from northern Bahia, Brazil
spellingShingle Nutrification impacts on coral reefs from northern Bahia, Brazil
Costa Júnior, O. S.
Coral reef
Eutrophication
Nutrients
Groundwater contamination
Brazil
title_short Nutrification impacts on coral reefs from northern Bahia, Brazil
title_full Nutrification impacts on coral reefs from northern Bahia, Brazil
title_fullStr Nutrification impacts on coral reefs from northern Bahia, Brazil
title_full_unstemmed Nutrification impacts on coral reefs from northern Bahia, Brazil
title_sort Nutrification impacts on coral reefs from northern Bahia, Brazil
author Costa Júnior, O. S.
author_facet Costa Júnior, O. S.
Leão, Zelinda Margarida de Andrade Nery
Nimmo, M.
Attrill, Martin John
author_role author
author2 Leão, Zelinda Margarida de Andrade Nery
Nimmo, M.
Attrill, Martin John
author2_role author
author
author
dc.contributor.author.fl_str_mv Costa Júnior, O. S.
Leão, Zelinda Margarida de Andrade Nery
Nimmo, M.
Attrill, Martin John
Costa Júnior, O. S.
Leão, Zelinda Margarida de Andrade Nery
Nimmo, M.
Attrill, Martin John
dc.subject.por.fl_str_mv Coral reef
Eutrophication
Nutrients
Groundwater contamination
Brazil
topic Coral reef
Eutrophication
Nutrients
Groundwater contamination
Brazil
description p.307-315
publishDate 2000
dc.date.issued.fl_str_mv 2000
dc.date.accessioned.fl_str_mv 2012-11-20T20:32:41Z
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://www.repositorio.ufba.br/ri/handle/ri/7253
dc.identifier.issn.none.fl_str_mv 0018-8158
dc.identifier.number.pt_BR.fl_str_mv v. 440, n. 1-3
identifier_str_mv 0018-8158
v. 440, n. 1-3
url http://www.repositorio.ufba.br/ri/handle/ri/7253
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
instacron:UFBA
instname_str Universidade Federal da Bahia (UFBA)
instacron_str UFBA
institution UFBA
reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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