Effect of nutrient loading on biogeochemical processes in tropical tidal creeks

The 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 compar...

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Bibliographic Details
Published in:Biogeochemistry 2012-04, Vol.108 (1-3), p.359-380
Main Authors: Smith, Jodie, Burford, Michele A, Revill, Andrew T, Haese, Ralf R, Fortune, Julia
Format: Article
Language:English
Subjects:
anaerobic conditions
benthic zone
biogeochemical cycles
Biogeochemistry
Biogeosciences
Creeks
Creeks & streams
Denitrification
Drawdown
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Ecological function
Ecosystems
Effluent treatment
Engineering and environment geology. Geothermics
Environmental Chemistry
Estuaries
eutrophication
Exact sciences and technology
Flushing
Geochemistry
Harbors
Hydrology
Hydrology. Hydrogeology
Hypoxia
Life Sciences
littoral zone
mangrove forests
Mineralogy
mouth
Nitrification
nitrogen
Nutrient loading
Nutrients
oxygen
phosphorus
Pollution load
Pollution, environment geology
Primary production
Primary productivity
Respiration
Sand bars
Sediments
sewage
Sewage effluent
Sewage treatment
Silicates
streams
Surface water
Tides
tropics
Wastewater treatment
Water column
Water geochemistry
Water quality
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Summary:The 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
ISSN:0168-2563
1573-515X
DOI:10.1007/s10533-011-9605-z