Elucidation of the microbial diversity in rivers in south-west Victoria, Australia impacted by rural agricultural contamination (dairy farming)

Aburto Medina, A, Shahsavari, E, Salzman, S, Kramer, A, Ball, A and Allinson, G 2019, 'Elucidation of the microbial diversity in rivers in south-west Victoria, Australia impacted by rural agricultural contamination (dairy farming)', Ecotoxicology and Environmental Safety, vol. 172, pp. 356-363.


Document type: Journal Article
Collection: Journal Articles

Title Elucidation of the microbial diversity in rivers in south-west Victoria, Australia impacted by rural agricultural contamination (dairy farming)
Author(s) Aburto Medina, A
Shahsavari, E
Salzman, S
Kramer, A
Ball, A
Allinson, G
Year 2019
Journal name Ecotoxicology and Environmental Safety
Volume number 172
Start page 356
End page 363
Total pages 8
Publisher Academic Press
Abstract We assessed the water quality of south-west Victorian rivers impacted by the dairy industry using traditional water quality assessment together with culture-dependent (colilert/enterolert) and also culture-independent (next generation sequencing) microbial methods. The aim of the study was to identify relationships/associations between dairy farming intensity and water contamination. Water samples with high total and faecal coliforms (>1000 MPN cfu/100 ml), and with high nitrogen levels (TN) were observed in zones with a high proportion of dairy farming. Members of the genus Nitrospira, Rhodobacter and Rhodoplanes were predominant in such high cattle density zones. Samples from sites in zones with lower dairy farming activities registered faecal coliform numbers within the permissible limits (<1000 MPN cfu/100 ml) and showed the presence of a wide variety of microorganisms. However, no bacterial pathogens were found in the river waters regardless of the proportion of cattle. The data suggests that using the spatially weighted proportion of land used for dairy farming is a useful way to target at-risk sub-catchments across south west Victoria; further work is required to confirm that this approach is applicable in other regions.
Subject Environmental Science and Management not elsewhere classified
Keyword(s) River waters quality
Faecal coliforms
Nitrospira
Rhodobacter
Rhodoplanes
DOI - identifier 10.1016/j.ecoenv.2019.01.112
Copyright notice © 2019 Elsevier Inc.
ISSN 0147-6513
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