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Temporal variation in benthic primary production in streams of the Australian wet-dry tropics

Garcia, Erica A., Pettit, Neil E., Warfe, Danielle M., Davies, Peter M., Kyne, Peter M., Novak, Peter A. and Douglas, Michael M. (2015). Temporal variation in benthic primary production in streams of the Australian wet-dry tropics. Hydrobiologia: the international journal on limnology and marine sciences,760(1):43-55.

Document type: Journal Article
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IRMA ID 84376995xPUB215
Title Temporal variation in benthic primary production in streams of the Australian wet-dry tropics
Author Garcia, Erica A.
Pettit, Neil E.
Warfe, Danielle M.
Davies, Peter M.
Kyne, Peter M.
Novak, Peter A.
Douglas, Michael M.
Journal Name Hydrobiologia: the international journal on limnology and marine sciences
Publication Date 2015
Volume Number 760
Issue Number 1
ISSN 0018-8158   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-84942369742
Start Page 43
End Page 55
Total Pages 13
Place of Publication Netherlands
Publisher Springer Netherlands
HERDC Category C1 - Journal Article (DIISR)
Abstract In the Australian wet–dry tropics, seasonal changes in hydrology can influence abiotic conditions and consequently influence standing stocks of benthic biomass and production. While there is some understanding of these processes at riverscape scales, effects of seasonal hydrology on benthic biomass and production in low-order streams remain largely unquantified. We observed changes in water quality, algal and macroinvertebrate biomass, and stream benthic primary productivity over a 15-month period in three low-order streams with contrasting flow regimes in the wet–dry tropics of northern Australia. Water quantity and quality showed a distinct seasonal signature reflected in seasonal peaks in algal (maximum 1.29 µg cm−2) and macroinvertebrate biomass (maximum 0.24 g m−2), and productivity (maximum 0.41 g C m−2 days−1). In particular, transitional periods between dry and wet seasons were key times of elevated production and algal biomass. Overall, variation in biomass and benthic primary production was greater between seasons than among streams indicating that extrapolation between seasons may not be appropriate.
Keywords Benthic algae
Gross primary production
Intermittent streams
Macroinvertebrates
Metabolism
Seasonal hydrology
Water quality
DOI http://dx.doi.org/10.1007/s10750-015-2301-6   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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