Acute toxicity largely reflects the salinity sensitivity of stream macroinvertebrates derived using field distributions

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dc.contributor.author Horrigan, N en_US
dc.contributor.author Dunlop, J en_US
dc.contributor.author Zavahir, F en_US
dc.contributor.author Kefford, Ben en_US
dc.contributor.editor en_US
dc.date.accessioned 2011-02-07T06:21:25Z
dc.date.available 2011-02-07T06:21:25Z
dc.date.issued 2007 en_US
dc.identifier 2009006150 en_US
dc.identifier.citation Horrigan N et al. 2007, 'Acute toxicity largely reflects the salinity sensitivity of stream macroinvertebrates derived using field distributions', CSIRO Publishing, vol. 58, no. 2, pp. 178-186. en_US
dc.identifier.issn 1323-1650 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/13412
dc.description.abstract Two types of salinity tolerance information are commonly used for assessing salinity risk to freshwater organisms. These are data from laboratory experiments, usually acute (<= 96-h LC50) values, and field distributions. Both approaches have advantages and limitations, and their applicability to the formation of guidelines and assessment of risks is not clear. In the present study, the acute lethal tolerances (72-h LC50) and acute tolerance scores (ATS) of 37 macroinvertebrate families from Queensland, Australia, were compared with maximum field conductivities and previously derived salinity sensitivity scores (SSS). LC50 values were significantly correlated with maximal field conductivities and SSS. To investigate this relationship further, the changes in community structure related to an increase in salinity were assessed. A salinity index (SI) (based on cumulative SSS) and acute salinity index (ASI) (based on cumulativeATS) were calculated using an independent data set from south-east Queensland (429 samples) and compared with each other and actual conductivity levels. Both indices were significantly correlated with each other and followed a similar trend when plotted against actual conductivity. These results support the notion that salinity sensitivity of macroinvertebrates derived from acute toxicity experiments reflects sensitivities derived using field distributions. Definition of this relationship will allow the two sources of salinity sensitivity to be combined in a weight-of-evidence approach, resulting in a more robust data set with which to estimate safe salinity concentrations. en_US
dc.language en_US
dc.publisher CSIRO Publishing en_US
dc.relation.isbasedon http://dx.doi.org/10.1071/MF05241 en_US
dc.title Acute toxicity largely reflects the salinity sensitivity of stream macroinvertebrates derived using field distributions en_US
dc.parent Marine and Freshwater Research en_US
dc.journal.volume 58 en_US
dc.journal.number 2 en_US
dc.publocation Collingwood, Australia en_US
dc.identifier.startpage 178 en_US
dc.identifier.endpage 186 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 060200 en_US
dc.personcode 0000062841 en_US
dc.personcode 0000062837 en_US
dc.personcode 109859 en_US
dc.personcode 0000062845 en_US
dc.percentage 100 en_US
dc.classification.name Ecology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity ISI:000244250400003 en_US
dc.description.keywords aquatic invertebrates; ecological indicators; salt pollution en_US
dc.staffid en_US


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