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Abstract

This document constitutes the annual, autumn 2012 Poatina Basslink report. Monitoring of macrophytes and macroinvertebrates was conducted in spring 2011 and autumn 2012, and for mussels in autumn 2011, under the Basslink Monitoring Program in Brumbys Creek and the lower Macquarie River.
Macrophytes were surveyed in September October and April 2011 at six sites in Brumbys Creek and ten sites in the lower Macquarie River (five upstream and five downstream of Brumbys Creek). A survey was conducted in each season, as required under the Basslink Monitoring Program, with all sites surveyed using:
 Boat-operated viewers, assessing % cover of dominant macrophytes at 2-5 m intervals across established, fixed transects in Brumbys Creek weirs 1 and 3;
 1 x 1 m quadrats, spaced at 1m intervals from an arbitrary head peg on transects across the channel edge in the lower Macquarie River, assessing % cover of dominant macrophytes.
Macroinvertebrates were sampled in Brumbys Creek, Westons Creek, and the lower Macquarie River as follows:
 Quantitative surber sampling, with 10 sample units taken per site placed randomly in mid-riffle habitats, in Brumbys (downstream of Weir 2) and Westons Creeks (reference site);
 Rapid bioassessment (RBA) kick sampling, with live-picking on-site in riffles at the above Brumbys and Westons Creek sites, and in edge habitats in the lower Macquarie River at three sites upstream and three sites downstream of the Brumbys Creek junction. Two RBA samples were collected at each sampling location on each sampling occasion.
The former samples were used to generate data on abundances of individual taxa, total abundances and diversity (as number of taxa) for Brumbys Creek and the Westons Creek reference. The latter samples were used to derive O/E values for each site, using the RIVPACS models developed by Davies et al. (1999) for Tasmanian Hydro catchments and the DPIWE NRHP AUSRIVAS models, as appropriate

Item Type:	Report (Project Report)
Authors/Creators:	Davies, PE and Cook, LSJ
Publisher:	Freshwater Systems
Additional Information:	© Hydro Tasmania 2012, © Freshwater Systems 2012
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