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dc.contributor.authorMuhid, Priyanesh
dc.contributor.authorBurford, Michele A
dc.date.accessioned2017-05-03T14:13:39Z
dc.date.available2017-05-03T14:13:39Z
dc.date.issued2012
dc.date.modified2013-03-24T22:56:43Z
dc.identifier.issn2044-2041
dc.identifier.urihttp://hdl.handle.net/10072/49755
dc.description.abstractThere is debate about the relative importance of controlling anthropogenic nitrogen (N) versus phosphorus (P) inputs to limit algal growth in lakes and reservoirs. Our study examined nutrient responses in a subtropical reservoir using short-term algal bioassays on 3 occasions, once during the austral winter and twice during the austral summer. Measurement of photosynthetic yield (Fv/Fm) was used to determine the response to nutrient addition. For the 2 summer sampling occasions, the photosynthetic yields of the N+P treatments were significantly higher than the control. At some sites and on some occasions there was a response to P or N alone, but there was no consistent pattern. The one winter sampling occasion had no response to nutrient addition. Overall, the magnitude of the photosynthetic yield of algal samples correlated with nitrate/nitrite (NO2-;/NO3-;) and soluble reactive phosphorus (SRP) concentrations, but not with ammonium (NH4+), or dissolved organic N (DON) or P (DOP), despite relatively high concentrations of DON. Therefore we concluded that both N and P co-limited the growth of phytoplankton in the 2 austral summer sampling occasions. This contrasted with high N:P ratios and low P concentrations observed, which suggested that the reservoir was most likely to be P limited. This study highlights the importance of determining algal responses to nutrients and measures nutrient concentrations and ratios to determine whether N or P should be controlled to prevent algal blooms.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent800408 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.publisherInternational Society of Limnology
dc.publisher.placeUnited Kingdom
dc.publisher.uriHttps://www.fba.org.uk/journals/index.php/IW/article/view/486
dc.relation.ispartofstudentpublicationY
dc.relation.ispartofpagefrom185
dc.relation.ispartofpageto192
dc.relation.ispartofissue4
dc.relation.ispartofjournalInland Waters
dc.relation.ispartofvolume2
dc.rights.retentionY
dc.subject.fieldofresearchFreshwater Ecology
dc.subject.fieldofresearchPhysical Geography and Environmental Geoscience
dc.subject.fieldofresearchEnvironmental Science and Management
dc.subject.fieldofresearchEcology
dc.subject.fieldofresearchcode060204
dc.subject.fieldofresearchcode0406
dc.subject.fieldofresearchcode0502
dc.subject.fieldofresearchcode0602
dc.titleAssessing nutrient limitation in a subtropical reservoir
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Environment
gro.rights.copyright© 2012 International Society of Limnology. This is an electronic version of an article published in Inland Waters, Vol 2, No 4, pp. 185-192, dx.doi.org/10.5268/IW-2.4.468. Inland Waters is available online at: www.fba.org.uk/journals with the open URL of your article.
gro.date.issued2012
gro.hasfulltextFull Text
gro.griffith.authorBurford, Michele A.
gro.griffith.authorMuhid, Priyanesh


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