Journal article
Estimating production of gilvin from catchment leaf litter during seasonal rains
Marine and Freshwater Research, Vol.56(6), pp.843-849
2005
Abstract
The yellow substance, gilvin, is an important component of water quality in natural waters. Quantitative study of gilvin production is difficult since gilvin is not a well defined substance. In the present study, leaf litter from four common tree species of south-western Australia were exposed to rainy weather for 183 days and leachate properties were monitored. The gilvin leaching from litter was estimated using a ‘humic acid (HA) equivalent’ concept, derived by drawing an analogy between the spectrophotometric properties of gilvin and that of humic acid. Gilvin (g440, m-1) was leached from litter primarily during the first few weeks after the commencement of the wet season. On average, 13% less gilvin was leached under ‘flooded’ conditions compared with ‘non-flooded’ conditions. Litter leaching in the presence of soil caused a significant time lag (about a month) for the peak load to occur, and reduced the total gilvin in the leachate through soil–litter interactions. Banksia menziesii leaves produced little gilvin, equivalent to 6.6% of that leached from the flooded gum. The Eucalyptus species, such as flooded gum and jarrah, common in wooded catchments in the region, appeared to be a major player producing yellow-coloured substances under annual rainfall conditions in south-western Australia.
Details
- Title
- Estimating production of gilvin from catchment leaf litter during seasonal rains
- Authors/Creators
- S. Qiu (Author/Creator)A.J. McComb (Author/Creator)R.W. Bell (Author/Creator)J.A. Davis (Author/Creator)
- Publication Details
- Marine and Freshwater Research, Vol.56(6), pp.843-849
- Publisher
- CSIRO Publishing
- Identifiers
- 991005541139407891
- Copyright
- 2005 CSIRO
- 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
- 3.45.1049 Dissolved Organic Matter
- Web Of Science research areas
- Fisheries
- Limnology
- Marine & Freshwater Biology
- Oceanography
- ESI research areas
- Plant & Animal Science