Effects of hydraulic conditions and larval size on the microdistribution of Hydrobiosidae (Trichoptera) in two New Zealand rivers

Collier, Kevin J.; Croker, Glenys F.; Hickey, Christopher W.; Quinn, John M.; Smith, B. S.

doi:10.1080/00288330.1995.9516678

Cited by 18 publications

(19 citation statements)

References 29 publications

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“…In addition, this result may be due to the influence of life stage on hydraulic preferences (e.g. Gore & Bryant, 1990; Collier et al. , 1995), suggesting the need for sampling more than one season to get accurate preference models.…”

Section: Discussionmentioning

confidence: 99%

Modelling the hydraulic preferences of benthic macroinvertebrates in small European streams

Dolédec

Lamouroux²,

Fuchs³

et al. 2006

Freshwater Biology

100

140

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1. Relating processes occurring at a local scale to the natural variability of ecosystems at a larger scale requires the design of predictive models both to orientate stream management and to predict the effects of larger scale disturbances such as climate changes. Our study contributes to this effort by providing detailed models of the hydraulic preferences of 151 invertebrate taxa, mostly identified at the species level. We used an extensive data set comprising 580 invertebrate samples collected using a Surber net from nine sites of second and third order streams during one, two or three surveys at each site. We used nested nonlinear mixed models to relate taxon local densities to bed shear stresses estimated from FliesswasserStammTisch hemisphere numbers.2. An average model by taxon, i.e. independent from surveys, globally explained 25% of the density variations of taxa within surveys. A quadratic relationship existed between the average preferences and the niche breadth of taxa, indicating that taxa preferring extreme hemisphere numbers had a reduced hydraulic niche breadth. A more complete model, where taxa preferences vary across surveys, globally explained 38% of the variation of taxa densities within surveys. Variations in preferences across surveys were weak for taxa preferring extreme hemisphere numbers. 3. There was a significant taxonomic effect on preferences computed from the complete model. By contrast, season, site, average hemisphere number within a survey and average density of taxa within a survey used as covariates did not consistently explain shifts in taxon hydraulic preferences across surveys. 4. The average hydraulic preferences of taxa obtained from the extensive data set were well correlated to those obtained from two additional independent data sets collected in other regions. The consistency of taxon preferences across regions supports the use of regional preference curves for estimating the impact of river management on invertebrate communities. By contrast, the hydraulic niche breadths of taxa computed from the different data sets were not related.

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Section: Discussionmentioning

confidence: 99%

Modelling the hydraulic preferences of benthic macroinvertebrates in small European streams

Dolédec

Lamouroux²,

Fuchs³

et al. 2006

Freshwater Biology

100

140

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show abstract

“…The same trend was observed for individuals of C. lepida, with the largest individuals being more numerous in habitats with high shear velocity conditions. As hypothesized by Collier et al (1995) for Hydrobiosidae (Insecta: Trichoptera) species, morphological adaptation to high shear velocity conditions, such as anal claws, may be more effective for larger individuals of C. lepida. Moreover, pupal mortality of trichopteran species is known to be partly due to siltation (Rutherford & Mackay, 1986), and largest larvae of C. lepida may progressively colonize habitats with high hydraulic constraints to reduce the risk of siltation during the motionless pupal stage.…”

Section: Shear Velocity Use Of Larvae For Different Size Classesmentioning

confidence: 97%

“…Therefore, studies characterizing hydraulic preferences of a given species should consider different size classes to better understand its strategy of habitat use. In this way, a few studies have related invertebrate body size to hydraulic parameters such as flow velocity (Collier, Croker, Hickey, Quinn, & Smith, 1995;Osborne & Herricks, 1987;Poff & Ward, 1992), substratum particle size, or roughness (Buffagni, Crosa, & Marchetti, 1995;Gee, 1982;Pringle, 1982;Rees, 1972;Williams & Moore, 1986), or near-bed hydraulic constraints (Martin, 1985;Statzner & Borchardt, 1994).…”

Section: Introductionmentioning

confidence: 98%

Hydraulic habitat use with respect to body size of aquatic insect larvae: Case of six species from a French Mediterranean type stream

2008

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Macroinvertebrates play a key role in lotic ecosystems, as fish prey and processors of organic material. Therefore, their hydraulic preferences have to be integrated in instream habitat models for ecological stream management. This study characterized physical habitat use in terms of shear velocity for the larvae of three Ephemeropteran (Ephoron virgo, Oligoneuriella rhenana, and Serratella ignita), two Trichopteran (Cheumatopsyche lepida and Hydropsyche exocellata) and one Dipteran species (Blepharicera fasciata) in a Mediterranean stream at a relatively low water discharge. O. rhenana, C. lepida, H. exocellata, and B. fasciata larvae were mainly found in high shear velocity conditions, whereas E. virgo and S. ignita larvae were found in low shear velocity conditions. Knowing that habitat preferences should vary during ontogenesis (with respect to changes in biological requirements and/or morphological abilities to withstand high flow, for example), our second objective was to characterize differences in the hydraulic habitat use (in terms of shear velocity) for different size classes of these six species.Larvae of H. exocellata and B. fasciata mainly colonized high shear velocity conditions and numerous individuals of these species also used medium shear velocity conditions, independent of size class.The use of high shear velocity conditions increased with larval size for C. lepida and O. rhenana, whilst the use of low shear velocity conditions increased for larger larvae of E. virgo and S. ignita. Various hypotheses are proposed to explain these different strategies of habitat use during ontogenesis. We point out the lack of knowledge about physical habitat shifts during the larval growth of freshwater invertebrates.These results highlight the interest to consider the respective habitat requirements of different size classes of invertebrates in instream habitat models. Population bottlenecks should be overcome if hydraulic conditions are kept suitable for all size classes by stream managers.

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“…The river supports a valued population of blue duck (Hymenolaimus malacorhynchos) which inhabits territories year-round and feeds almost exclusively on benthic invertebrates (Collier, 1991;Veltman et al, 1995). The invertebrate fauna of the river has already been intensively studied with respect to instream flow microhabitat use (see Collier, 1993Collier, , 1994Collier et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Effects of flow regulation and sediment flushing on instream habitat and benthic invertebrates in a New Zealand river influenced by a volcanic eruption

Collier

2002

River Research & Apps

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I sampled five sites above and below a dam in the central North Island of New Zealand on five to six occasions to examine the effects on benthic substrates, periphyton and invertebrate communities of (i) degree of flow regulation and (ii) flushing of sediment stored behind a dam. A series of volcanic eruptions during the course of this study provided the opportunity to investigate the effects of a period of high sediment delivery on this regulated river. The operation of the dam prior to sluicing of stored sediment appeared to have little impact on substrate size distribution or fine suspendable sediment levels. Periphyton biomass was markedly higher below than above the dam when sampling was preceded by a period of stable baseflow, but over all sampling dates biomass and inorganic content of periphyton did not appear to be related to degree of flow regulation. The taxonomic richness, biomass and density of invertebrate communities were lowest directly below, rather than above, the dam on most dates, and the site below the dam differed significantly from some of the downstream sites. However, changes in invertebrate abundance and diversity generally did not follow the expected gradient of flow regulation impacts except for the mayfly Deleatidium. Multiple regression analyses implicated substrate size and the biomass and inorganic content of periphyton as significant predictor variables for invertebrate density, biomass and taxonomic richness on sampling dates not influenced by recent sediment flushes, whereas degree of flow regulation was a significant predictor for densities of the dominant chironomid Cricotopus. The volcanic eruption led to deposition of fine silt that had passed through the dam with the residual flow and coarser sediments released during subsequent dam flushes. Flushing of stored sediment during large floods increased levels of sand and gravel directly below the dam and upstream of a large island in the middle reaches of the river, and also appeared to increase scouring of periphyton and associated invertebrates downstream. Overall, invertebrate communities in the study reach appeared to be structured more by periphyton accrual patterns, changes in substrate composition, the occurrence of large floods and natural longitudinal gradients than degree of flow regulation. These findings suggest that site-specific and large-scale factors can obscure generalized reach-scale patterns expected along regulated rivers.

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Effects of hydraulic conditions and larval size on the microdistribution of Hydrobiosidae (Trichoptera) in two New Zealand rivers

Cited by 18 publications

References 29 publications

Modelling the hydraulic preferences of benthic macroinvertebrates in small European streams

Modelling the hydraulic preferences of benthic macroinvertebrates in small European streams

Hydraulic habitat use with respect to body size of aquatic insect larvae: Case of six species from a French Mediterranean type stream

Effects of flow regulation and sediment flushing on instream habitat and benthic invertebrates in a New Zealand river influenced by a volcanic eruption

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