Journal article
Phosphorus-leaching from litterfall in wetland catchments of the Swan Coastal Plain, southwestern Australia
Hydrobiologia, Vol.472(1/3), pp.95-105
2002
Abstract
Many wetlands of the Swan Coastal Plain in southwestern Australia have catchments with significant areas of
native vegetation. The dynamics of P release from their litter and its significance as a P source for wetlands have
not been previously investigated. Litterfall of common plant species were collected before the local rainy season,
and examined for P leaching properties under inundated conditions. Inundation of ‘intact’ litter materials for 24
hours leached 30±7.5% (95% confidence level) of this Tot-P in litter, measured by anion exchange membrane extraction. This increased to 46.9% of ‘apparent’ P release at 115 days. The released P was incorporated into microbial biomass during leaching so modifying leachate concentrations. Using liquid chloroform ‘fumigation’ it was estimated that 36.2 ± 15.6% (95% confidence level) of Tot-P leached during the 115-day inundation was in the microbial biomass pool, not directly measured by AEM extraction. P leaching during initial and prolonged inundation correlated with litter Ca, Mg and total base concentration, but the initial Tot-P concentration of litter was the best predictor for P leaching, in both short-term and prolonged inundation (R2 = 0.80 and 0.93, p < 0.0001). The high P leaching rate during 24 hours suggested that P from litter during ‘first storm’ events could produce a significant P flux from local catchments and contribute nutrients to downstream wetlands.
Details
- Title
- Phosphorus-leaching from litterfall in wetland catchments of the Swan Coastal Plain, southwestern Australia
- Authors/Creators
- S. Qiu (Author/Creator)A.J. McComb (Author/Creator)R.W. Bell (Author/Creator)
- Publication Details
- Hydrobiologia, Vol.472(1/3), pp.95-105
- Publisher
- Kluwer Academic Publishers
- Identifiers
- 991005543785207891
- Copyright
- 2002 Kluwer Academic Publishers
- Murdoch Affiliation
- School of Environmental Science
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.45 Soil Science
- 3.45.112 Soil Carbon Dynamics
- Web Of Science research areas
- Marine & Freshwater Biology
- ESI research areas
- Plant & Animal Science