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Succession and Physiological Health of Freshwater microalgal fouling in a tasmanian hydropower canal


Perkins, KJ and Andrewartha, JM and McMinn, A and Cook, SS and Hallegraeff, GM, Succession and Physiological Health of Freshwater microalgal fouling in a tasmanian hydropower canal, Biofouling, 26, (6) pp. 637-644. ISSN 0892-7014 (2010) [Refereed Article]

DOI: doi:10.1080/08927014.2010.506610


Freshwater microalgal biofouling in hydropower canals in Tarraleah, Tasmania, is dominated by a single diatom species, Gomphonema tarraleahae. The microfouling community is under investigation with the aim of reducing its impact on electricity generation. Species succession was investigated using removable glass slides. Fouled slides were examined microscopically and for chlorophyll a biomass. Chl a biomass increased steeply after 8 weeks (0.09-0.87 mg m(-2)), but increased much earlier on slides surrounded by a biofouled inoculum. Succession began with low profile diatoms such as Tabellaria flocculosa, progressing to stalked diatoms such as Gomphonema spp. and Cymbella aspera. Few chlorophytes and no filamentous algae were present. Pulse amplitude modulated fluorometry was used to measure the physiological health of fouling on the canal wall. Maximum quantum yield (F(v)/F(m)) measurements were consistently <0.18, indicating that the fouling mat consisted of dead or dying algae. The succession and physiological health of cells in the fouling community has broad implications for mitigation techniques used.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Energy
Objective Group:Renewable energy
Objective Field:Biofuel energy
UTAS Author:Perkins, KJ (Miss Kate Perkins)
UTAS Author:Andrewartha, JM (Dr Jessica Walker)
UTAS Author:McMinn, A (Professor Andrew McMinn)
UTAS Author:Cook, SS (Dr Suellen Cook)
UTAS Author:Hallegraeff, GM (Professor Gustaaf Hallegraeff)
ID Code:66744
Year Published:2010
Web of Science® Times Cited:8
Deposited By:Engineering
Deposited On:2011-02-10
Last Modified:2011-05-11

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