Effect of geomorphological setting and rainfall on nutrient exchange in mangroves during tidal inundation

Adame, Maria Fernanda, Virdis, Bernardino and Lovelock, Catherine E. (2010) Effect of geomorphological setting and rainfall on nutrient exchange in mangroves during tidal inundation. Marine and Feshwater Research, 61 10: 1197-1206. doi:10.1071/MF10013

Author Adame, Maria Fernanda
Virdis, Bernardino
Lovelock, Catherine E.
Title Effect of geomorphological setting and rainfall on nutrient exchange in mangroves during tidal inundation
Journal name Marine and Feshwater Research   Check publisher's open access policy
ISSN 1323-1650
Publication date 2010
Sub-type Article (original research)
DOI 10.1071/MF10013
Volume 61
Issue 10
Start page 1197
End page 1206
Total pages 10
Editor A. J. Boulton
K. Hunter
Place of publication East Melbourne, Vic., Australia
Publisher CSIRO
Collection year 2011
Language eng
Subject 960503 Ecosystem Assessment and Management of Coastal and Estuarine Environments
050206 Environmental Monitoring
Formatted abstract
One of the key ecosystem services provided by mangroves is their role in mediating nutrient exchange, thereby protecting coastal ecosystems from negative impacts of nutrient enrichment. In this study, we tested whether geomorphological setting and level of rainfall affect the intensity and direction of nutrient exchange. Our hypotheses were that tidal mangroves retain more nutrients than riverine mangroves and that nutrient retention is stronger during periods of high rainfall. Concentrations of soluble reactive phosphorus (SRP), nitrogen oxides (NOx–-N) and ammonium (NH4+) were measured from water entering and leaving the mangroves during tidal cycles. Our results show that nutrient concentrations were higher in the flood tide compared with the ebb tide by up to 28% for NOx–-N, 51% for SRP and 83% for NH4+, suggesting retention by the mangroves. Geomorphological setting determined nutrient exchange to some extent, with some riverine sites receiving more nutrients than tidal sites and thus, being more important in nutrient retention. Rainfall was important in determining nutrient exchange as it enhanced SRP and NH4+ retention. These results show that mangroves can improve water quality of creeks and rivers, and underscore the need for conservation of mangroves over a range of geomorphological settings.
© 2010 CSIRO.

Keyword Australia
Coastal wetlands
Riverine mangroves
South-east Queensland
Tidal mangroves
Municipal waste water
River estuary
Southwest Florida
Organic Carbon
Chwaka Bay
Salt marsh
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Biological Sciences Publications
Advanced Water Management Centre Publications
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 13 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 14 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sun, 31 Oct 2010, 00:04:10 EST