Show simple item record

dc.contributor.authorSmith, Jodie
dc.contributor.authorBurford, Michele A
dc.contributor.authorRevill, Andrew T
dc.contributor.authorHaese, Ralf R
dc.contributor.authorFortune, Julia
dc.date.accessioned2018-12-12T01:31:08Z
dc.date.available2018-12-12T01:31:08Z
dc.date.issued2012
dc.date.modified2013-06-18T03:08:51Z
dc.identifier.issn0168-2563
dc.identifier.doi10.1007/s10533-011-9605-z
dc.identifier.urihttp://hdl.handle.net/10072/48711
dc.description.abstractThe effect of increased nutrient loads on biogeochemical processes in macrotidal, mangrove-lined creeks was studied in tropical Darwin Harbour, Australia. This study uses an integrative approach involving multiple benthic and pelagic processes as measures of ecosystem function, and provides a comparison of these processes in three tidal creeks receiving different loads of treated sewage effluent. There were significant differences in process rates between Buffalo Creek (BC) (hypereutrophic), which receives the largest sewage loads; Myrmidon Creek (MC) (oligotrophic-mesotrophic) which receives smaller sewage inputs; and Reference Creek (RC) (oligotrophic) which is comparatively pristine. Benthic nutrient fluxes and denitrification were more than an order of magnitude higher and lower, respectively, in BC and denitrification efficiency (DE) was <10%. Pelagic primary production rates were also much higher in BC but respiration exceeded primary production resulting in severe drawdown of O 2 concentrations at night. Hypoxic conditions released oxide-bound phosphorus and inhibited coupled nitrification-denitrification, enhancing benthic nitrogen and phosphorus fluxes, leading to a build-up of excess nutrients in the water column. Poor water quality in BC was exacerbated by limited tidal flushing imposed by a narrow meandering channel and sandbar across the mouth. In contrast to BC, the effect of the sewage load in MC was confined to the water column, and the impact was temporary and highly localized. This is attributed to the effective flushing of the sewage plume with each tidal cycle. Denitrification rates in MC and RC were high (up to 6.83 mmol N m -2 day -1) and DE was approximately 90%. This study has identified denitrification, benthic nutrient fluxes and pelagic primary production as the biogeochemical processes most affected by nutrient loading in these tidal creek systems. Physical process play a key role and the combined influence of nutrient loading and poor tidal flushing can have serious consequences for ecosystem functioning
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoen_US
dc.publisherSpringer
dc.publisher.placeNetherlands
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom359
dc.relation.ispartofpageto380
dc.relation.ispartofissue1-3
dc.relation.ispartofjournalBiogeochemistry
dc.relation.ispartofvolume108
dc.rights.retentionY
dc.subject.fieldofresearchEnvironmental Sciences not elsewhere classified
dc.subject.fieldofresearchOther Chemical Sciences
dc.subject.fieldofresearchGeochemistry
dc.subject.fieldofresearchEnvironmental Science and Management
dc.subject.fieldofresearchcode059999
dc.subject.fieldofresearchcode0399
dc.subject.fieldofresearchcode0402
dc.subject.fieldofresearchcode0502
dc.titleEffect of nutrient loading on biogeochemical processes in tropical tidal creeks
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionPost-print
gro.rights.copyright© 2012 Springer Netherlands. This is an electronic version of an article published in Biogeochemistry, 2012, Volume 108, Issue 1–3, pp 359–380. Biogeochemistry is available online at: http://link.springer.com/ with the open URL of your article.
gro.date.issued2012
gro.hasfulltextFull Text
gro.griffith.authorBurford, Michele A.


Files in this item

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record