Wetlands in changed landscapes: the influence of habitat transformation on the physico-chemistry of temporary depression wetlands

dc.contributor.authorBird, Matthew Sen_ZA
dc.contributor.authorDay, Jenny Aen_ZA
dc.date.accessioned2015-12-28T06:53:30Z
dc.date.available2015-12-28T06:53:30Z
dc.date.issued2014en_ZA
dc.description.abstractTemporary wetlands dominate the wet season landscape of temperate, semi-arid and arid regions, yet, other than their direct loss to development and agriculture, little information exists on how remaining wetlands have been altered by anthropogenic conversion of surrounding landscapes. This study investigates relationships between the extent and type of habitat transformation around temporary wetlands and their water column physico-chemical characteristics. A set of 90 isolated depression wetlands (seasonally inundated) occurring on coastal plains of the south-western Cape mediterranean-climate region of South Africa was sampled during the winter/spring wet season of 2007. Wetlands were sampled across habitat transformation gradients according to the areal cover of agriculture, urban development and alien invasive vegetation within 100 and 500 m radii of each wetland edge. We hypothesized that the principal drivers of physico-chemical conditions in these wetlands (e.g. soil properties, basin morphology) are altered by habitat transformation. Multivariate multiple regression analyses (distance-based Redundancy Analysis) indicated significant associations between wetland physico-chemistry and habitat transformation (overall transformation within 100 and 500 m, alien vegetation cover within 100 and 500 m, urban cover within 100 m); although for significant regressions the amount of variation explained was very low (range: ∼2 to ∼5.5%), relative to that explained by purely spatio-temporal factors (range: ∼35.5 to ∼43%). The nature of the relationships between each type of transformation in the landscape and individual physico-chemical variables in wetlands were further explored with univariate multiple regressions. Results suggest that conservation of relatively narrow (∼100 m) buffer strips around temporary wetlands is likely to be effective in the maintenance of natural conditions in terms of physico-chemical water quality.en_ZA
dc.identifier.apacitationBird, M. S., & Day, J. A. (2014). Wetlands in changed landscapes: the influence of habitat transformation on the physico-chemistry of temporary depression wetlands. <i>PLoS One</i>, http://hdl.handle.net/11427/16082en_ZA
dc.identifier.chicagocitationBird, Matthew S, and Jenny A Day "Wetlands in changed landscapes: the influence of habitat transformation on the physico-chemistry of temporary depression wetlands." <i>PLoS One</i> (2014) http://hdl.handle.net/11427/16082en_ZA
dc.identifier.citationBird, M. S., & Day, J. A. (2013). Wetlands in changed landscapes: the influence of habitat transformation on the physico-chemistry of temporary depression wetlands. PloS one, 9(2), e88935-e88935. doi:10.1371/journal.pone.0088935en_ZA
dc.identifier.ris TY - Journal Article AU - Bird, Matthew S AU - Day, Jenny A AB - Temporary wetlands dominate the wet season landscape of temperate, semi-arid and arid regions, yet, other than their direct loss to development and agriculture, little information exists on how remaining wetlands have been altered by anthropogenic conversion of surrounding landscapes. This study investigates relationships between the extent and type of habitat transformation around temporary wetlands and their water column physico-chemical characteristics. A set of 90 isolated depression wetlands (seasonally inundated) occurring on coastal plains of the south-western Cape mediterranean-climate region of South Africa was sampled during the winter/spring wet season of 2007. Wetlands were sampled across habitat transformation gradients according to the areal cover of agriculture, urban development and alien invasive vegetation within 100 and 500 m radii of each wetland edge. We hypothesized that the principal drivers of physico-chemical conditions in these wetlands (e.g. soil properties, basin morphology) are altered by habitat transformation. Multivariate multiple regression analyses (distance-based Redundancy Analysis) indicated significant associations between wetland physico-chemistry and habitat transformation (overall transformation within 100 and 500 m, alien vegetation cover within 100 and 500 m, urban cover within 100 m); although for significant regressions the amount of variation explained was very low (range: ∼2 to ∼5.5%), relative to that explained by purely spatio-temporal factors (range: ∼35.5 to ∼43%). The nature of the relationships between each type of transformation in the landscape and individual physico-chemical variables in wetlands were further explored with univariate multiple regressions. Results suggest that conservation of relatively narrow (∼100 m) buffer strips around temporary wetlands is likely to be effective in the maintenance of natural conditions in terms of physico-chemical water quality. DA - 2014 DB - OpenUCT DO - 10.1371/journal.pone.0088935 DP - University of Cape Town J1 - PLoS One LK - https://open.uct.ac.za PB - University of Cape Town PY - 2014 T1 - Wetlands in changed landscapes: the influence of habitat transformation on the physico-chemistry of temporary depression wetlands TI - Wetlands in changed landscapes: the influence of habitat transformation on the physico-chemistry of temporary depression wetlands UR - http://hdl.handle.net/11427/16082 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/16082
dc.identifier.urihttp://dx.doi.org/10.1371/journal.pone.0088935
dc.identifier.vancouvercitationBird MS, Day JA. Wetlands in changed landscapes: the influence of habitat transformation on the physico-chemistry of temporary depression wetlands. PLoS One. 2014; http://hdl.handle.net/11427/16082.en_ZA
dc.language.isoengen_ZA
dc.publisherPublic Library of Scienceen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en_ZA
dc.rights.holder© 2014 Bird, Dayen_ZA
dc.rights.urihttp://creativecommons.org/licenses/by/4.0en_ZA
dc.sourcePLoS Oneen_ZA
dc.source.urihttp://journals.plos.org/plosoneen_ZA
dc.subject.otherWetlandsen_ZA
dc.subject.otherHabitatsen_ZA
dc.subject.otherAgricultureen_ZA
dc.subject.otherLatitudeen_ZA
dc.subject.otherPhosphatesen_ZA
dc.subject.otherDissolved oxygenen_ZA
dc.subject.otherLongitudeen_ZA
dc.subject.otherTurbidityen_ZA
dc.titleWetlands in changed landscapes: the influence of habitat transformation on the physico-chemistry of temporary depression wetlandsen_ZA
dc.typeJournal Articleen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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