Dietary variations of predaceous caddisfly larvae (Trichoptera: Rhyacophilidae, Polycentropodidae and Arctopsychidae) from British Columbian streams

Dudgeon, David; Richardson, John S.

doi:10.1007/bf00014276

Cited by 12 publications

(8 citation statements)

References 23 publications

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“…Decrease of trichopteran predatory pressure in the potamal was also described in many recent studies dealing with the predation effects of trichopteran larvae on the spatial and temporal dynamics of benthic macroinvertebrates (MECOM, 1972;HILLDREW and TOWNSEND, 1980;MARTIN, 1985;DUDGEON and RICHARDSON, 1988;BASAGUREN and ORIVE, 1989;LANCASTER et al, 1990;MUOTKA, 1993;HABDIJA et al 1997). In the potamal we found no predatory trichopterans.…”

Section: Discussionmentioning

confidence: 60%

Vegetation Cover and Substrate Type as Factors Influencing the Spatial Distribution of Trichopterans along a Karstic River

Habdija

Radanović

Primc-Habdija

et al. 2002

Internat. Rev. Hydrobiol.

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In the longitudinal continuum of the Kupa River the vegetation cover and substrate type were the important environmental factors influencing the spatial differences in the biomass and community composition. Of total macroinvertebrate biomass, a significantly greater percentage of trichopterans was found on boulder and cobble substrata covered with moss (54.3% on boulders, 55.8% on cobbles) than on substrata covered with periphyton (9.9% on boulders, 14.8% on cobbles). In the potamal, trichopterans were markedly reduced (<2.5% of total macroinvertebrate biomass) on gravel substrata. A comparison of the Shannon diversity index values suggested that for trichopteran species diversity the substrate type was a more influential factor than vegetation cover. On the other hand, multidimensional scaling analysis showed that trichopteran community composition was related more significantly to vegetation cover and river area than to substrate type. In the rhithral the vegetation cover was an important factor influencing the functional feeding group composition of trichopterans. The spatial distribution of scrapers and filtering collectors depended significantly on the vegetation cover associated with substrate type, and shredder trichopterans were related to vegetation cover only. Predatory trichopterans made up 17–65% of total predator biomass, and in the rhithron area they were correlated significantly only with vegetation cover. On gravel substrata in the potamal, vegetation cover did not affect the spatial distribution of shredder and collector‐filterer trichopterans significantly.

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Section: Discussionmentioning

confidence: 60%

Vegetation Cover and Substrate Type as Factors Influencing the Spatial Distribution of Trichopterans along a Karstic River

Habdija

Radanović

Primc-Habdija

et al. 2002

Internat. Rev. Hydrobiol.

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“…In particular, within the filter-feeding group Hydropsychidae, they suggest Parapsyche, Arctopsyche and Diplectrona are typical of headwater streams. Parapsyche and Arctopsyche occupy steep streams, using the microhabitats between cobbles and boulders with hydraulic jumps to place their nets, associated with their predatory habits [42,79]. Diplectrona appears to require cool water [80].…”

Section: Invertebratesmentioning

confidence: 99%

Biological Diversity in Headwater Streams

Richardson

2019

Water

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Headwaters, the sources of all stream networks, provide habitats that are unique from other freshwater environments and are used by a specialised subset of aquatic species. The features of headwaters that provide special habitats include predator-free or competitor-free spaces; specific resources (particularly detrital based); and moderate variations in flows, temperature and discharge. Headwaters provide key habitats for all or some life stages for a large number of species across just about all freshwater phyla and divisions. Some features of headwaters, including isolation and small population sizes, have allowed for the evolutionary radiation of many groups of organisms within and beyond those habitats. As small and easily engineered physical spaces, headwaters are easily degraded by streambank development, ditching and even burial. Headwater streams are among the most sensitive of freshwater ecosystems due to their intimate linkage with their catchments and how easily they are impacted. As a unique ecosystem with many specialist species, headwater streams deserve better stewardship.

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“…Both families build nets and some species are adapted to living in low-velocity streams (Dudgeon and Richardson 1988;Wiggins 1996). Examination of individual families, however, revealed that larval Philopotamidae (a collector-filterer) and larval and adult Polycentropodidae (a predator) were more common in the less persistent streams.…”

Section: Influence Of Stream Persistence Class (Perennial Intermittementioning

confidence: 99%

Communities of aquatic insects of old-growth and clearcut coastal headwater streams of varying flow persistence

Price¹,

Suski²,

McGarvie³

et al. 2003

Can. J. For. Res.

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Headwater streams, varying in flow persistence from ephemeral to intermittent to perennial, provide the tightest coupling between water and land, yet they often receive the least protection during forest management. We described communities of aquatic insects in perennial, intermittent, and ephemeral channels surrounded by old-growth forest and 4-to 8-year-old clearcuts in Clayoquot Sound, British Columbia, to determine whether temporary streams have unique aquatic communities and to examine the short-term impacts of harvesting. We measured flow persistence, stream size, canopy cover, organic detritus, and algal biomass in 19 streams. We sampled aquatic invertebrates with a combination of emergence cages and kicknet samples. Temporary and old-growth streams had more organic detritus and a higher abundance of shredders. Perennial and clearcut streams had a higher abundance of some algal grazers, but not higher algal biomass. Insect richness was similar in intermittent and perennial streams of each seral stage but lower in ephemeral streams. Intermittent streams contained four taxa not found in the other stream classes; perennial and ephemeral streams had none. Communities of aquatic insects differed between streams surrounded by clearcuts and old growth, and varied with continuity of flow.Résumé : Les ruisseaux de tête de bassins hydrographiques, avec une persistance de débit qui varie d'éphémère à intermittent, puis à pérenne, constituent l'interface le plus direct entre l'eau et la terre, mais ils sont les moins biens protégés dans le cadre de l'aménagement forestier. Nous avons décrit les communautés d'insectes aquatiques dans des ruisseaux pérennes, intermittents et éphémères bordés par des forêts anciennes et des coupes à blanc de 4 à 8 ans à Clayoquot Sound, en Colombie-Britannique, pour déterminer si les ruisseaux temporaires ont des communautés aquatiques uniques et pour examiner les impacts à court terme de la coupe forestière. Nous avons mesuré la persistance du débit, la taille du ruisseau, le recouvrement de la canopée et la biomasse de débris organiques et d'algues dans 19 ruisseaux. Nous avons échantillonné les invertébrés aquatiques en combinant des échantillons provenant de cages à émergence et de filets faucheurs. Les ruisseaux temporaires en forêt ancienne contenaient plus de débris organiques et avaient une plus grande abondance de déchiqueteurs. Les ruisseaux pérennes dans des coupes à blanc avaient une plus grande abondance de certains brouteurs d'algues, mais pas une plus grande biomasse d'algues. La richesse en insectes était semblable dans les ruisseaux intermittents et pérennes de chaque stade successoral, mais plus faible dans les ruisseaux éphémères. Les ruisseaux intermittents contenaient quatre taxons exclusifs qui n'ont pas été trouvés dans les autres classes de ruisseaux; les ruisseaux pérennes et éphémères en avaient aucun. Les communautés d'insectes aquatiques diffèrent selon que les ruisseaux sont bordés par des coupes à blanc ou des forêts anciennes et elles varient selon la pers...

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Dietary variations of predaceous caddisfly larvae (Trichoptera: Rhyacophilidae, Polycentropodidae and Arctopsychidae) from British Columbian streams

Cited by 12 publications

References 23 publications

Vegetation Cover and Substrate Type as Factors Influencing the Spatial Distribution of Trichopterans along a Karstic River

Vegetation Cover and Substrate Type as Factors Influencing the Spatial Distribution of Trichopterans along a Karstic River

Biological Diversity in Headwater Streams

Communities of aquatic insects of old-growth and clearcut coastal headwater streams of varying flow persistence

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