Efficiency estimates of a stream Benthos suction sampler

Growns, IO

doi:10.1071/mf9900621

Cited by 10 publications

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“…Macroinvertebrate communities were sampled at the eight sites on 12 occasions between November 1988 and July 1990, except that Sites C1 and C2 were not sampled in January 1989 owing to equipment failure. Six replicate benthic samples were taken randomly from each site on each sampling occasion with a modified Boulton (1985) sampler (see Growns 1990). Macroinvertebrate samples were stored in 70% ethanol until they were sorted.…”

Section: Methodsmentioning

confidence: 99%

Effects of forestry activities (clearfelling) on stream macroinvertebrate fauna in south-western Australia

Growns¹,

Davis²

1994

Mar. Freshwater Res.

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The effects of forestry activities on macroinvertebrate community structure were examined in the headwaters of Carey Brook in the south-west of Australia. The fauna at four sites on an upland stream that ran through a logging coupe were compared, before and after clearfelling, with the fauna at four nearby undisturbed sites. Mean species richness and mean total abundance declined at the treatment sites relative to the control sites after the commencement of clearfelling activities. The composition of the macroinvertebrate fauna in the disturbed stream changed in comparison with that in the undisturbed sites after logging started but returned to the pre-logging composition after winter and spring rains had stopped. The observed changes in the macroinvertebrate fauna occurred during the periods of high loads of suspended inorganic solids at the treatment sites. The possible reasons for the observed results are discussed.

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Section: Methodsmentioning

confidence: 99%

Effects of forestry activities (clearfelling) on stream macroinvertebrate fauna in south-western Australia

Growns¹,

Davis²

1994

Mar. Freshwater Res.

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“…One technique is to estimate the population by taking repeated samples from one location until most or all animals have been collected (Southwood, 1978) . Sampler efficiency has been expressed as the percentage of the total number of individuals caught in consecutive samples that were removed in the first sample (Brown et al ., 1987 ;Growns, 1990) . However, these specific estimates are of limited use because they depend entirely on the duration of each sample, the effort expended by the operator and the prevailing physical conditions (e .g .…”

Section: Efficiency Estimatesmentioning

confidence: 99%

An efficient and quantitative aquatic benthos sampler for use in diverse habitats with variable flow regimes

Brooks

1994

Hydrobiologia

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A suction sampler designed to minimize sampling error, and quantitatively collect benthic macroinvertebrates from coarse substrata under various flow regimes is described . This sampler uses a 12 V bilge pump (capacity 4400 1 h -`) to suck animals into a collecting net from substrata disturbed by a single operator . Macroinvertebrates were collected more rapidly by this sampler than by a Surber sampler or a Boulton suction sampler . Sources of sampling error are discussed for all three samplers . The electric pump sampler described here is suitable for sampling habitats where depth and velocity vary spatially and with time .

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Macroinvertebrate assemblages of littoral habitats in the Macquarie and Mersey rivers, Tasmania: Implications for the management of regulated rivers

Humphries

Davies

Mulcahy

1996

Regul. Rivers: Res. Mgmt.

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Littoral habitats in large rivers are influenced to varying degrees by changes in discharge. Irrigation abstractions can increase the amount of habitat that would naturally be dewatered during low flow periods and therefore it is important to have some knowledge of the potential impact this may have on riverine macroinvertebrates. The macroinvertebrate assemblages of common littoral habitats in riffles, pools and runs in two reaches each of the Macquarie and Mersey Rivers, northern Tasmania, Australia were compared from samples collected during the low flow and irrigation season, between December 1991 and April 1992. The area under water of these habitats, riffle substrata, macrophyte beds and coarse woody debris, responded differently to changes in discharge. Within a reach, the same taxonomic groups often dominated the total number of macroinvertebrates for all habitats, but there were differences in the proportions contributed by these taxa to the different habitats. In general, taxa characteristic of slow‐flowing or lentic habitats, such as ostracods and amphipods, were dominant in macrophyte beds in pools and runs, whereas taxa such as larval elmid beetles and hydropsychid caddisflies were dominant in riffles. A substantial component of the fauna from each habitat within a reach was unique to that habitat, but there was always a similar number of taxa common to all habitats. Classification and ordination grouped samples from both rivers firstly by habitat and secondly by month and reach. Total density and family richness of invertebrates differed by reach, habitat and month in both rivers, except for richness in the Mersey River where habitat was not significant. Differences in densities and numbers of invertebrate families among habitats were not consistent between reaches for each river. This study has highlighted the differences in macroinvertebrate assemblages of several littoral habitats in two lowland rivers in Tasmania. Differences in taxonomic composition, density and richness among habitats within reaches strongly imply the uniqueness of these habitats in terms of the invertebrate faunas that occupy them. We suggest that if maintenance of biotic diversity is an aim of instream flow management, water allocations that address low flows should place a high priority on the maintenance of a diversity of habitats.

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Efficiency estimates of a stream Benthos suction sampler

Cited by 10 publications

References 0 publications

Effects of forestry activities (clearfelling) on stream macroinvertebrate fauna in south-western Australia

Effects of forestry activities (clearfelling) on stream macroinvertebrate fauna in south-western Australia

An efficient and quantitative aquatic benthos sampler for use in diverse habitats with variable flow regimes

Macroinvertebrate assemblages of littoral habitats in the Macquarie and Mersey rivers, Tasmania: Implications for the management of regulated rivers

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