Interactions between Larval Size, Microdistribution and Substrate in the Stoneflies of an Iron-Rich Stream
- 1 November 1980
- Vol. 35 (3), 387-396
- https://doi.org/10.2307/3544655
Abstract
Two species of stoneflies, Nemurella picteti Klapalek and Leuctra nigra Olivier, were abundant in a species-poor, iron-rich stream. N. picteti has a one year life cycle. At least some L. nigra larvae take two years to develop. Larvae of both species exhibited contagious dispersion patterns throughout the year. In general, larvae were over-represented in accumulations of allochthonous plant litter on which they feed. However, the younger larvae of L. nigra were relatively more common on stony substrate. Changes in distribution and abundance of the larvae through their development were related to their food supply and to intense predation pressure in the stream. /// Два вида веснянок - Nemurella picteti Klapalek и Leuctra nigra Olivier были многочисленны в реке с бедным видовым составом и высоким содержанием железа. N. picteti имеет одногодовой цикл. По крайней мере некоторые личинки L. nigra развиваются в течение 2-х лет. Личинки обоих видов имеют непрерывное распределение в течение года. В целом личинки представлены в избытке в скоплениях аллохтонной растительной подстилки, которой они питаются. Однако, более молодые личинки L. nigra относительно более часто встречаются на каменистых субстратах. Различия в характере распределения и чесленности личинок в течение их развития связаны с запасами их пищи и прессом хищников в реке.This publication has 8 references indexed in Scilit:
- Aggregation, interference and foraging by larvae of Plectrocnemia conspersa (Trichoptera: Polycentropodidae)Animal Behaviour, 1980
- Resource Partitioning by Two Freshwater Invertebrate Predators with Contrasting Foraging StrategiesJournal of Animal Ecology, 1979
- A Comparison of Gravimetric and Photographic Methods of Stream Substrate Analysis in a Study of Benthos MicrodistributionOikos, 1979
- Foraging strategies and co-existence in a seasonal environmentOecologia, 1978
- Semivoltinism in Mountain Populations of Nemurella pictetii (Plecoptera)Oikos, 1978
- The influence of substrate on the functional response of Plectrocnemia conspersa (Curtis) larvae (Trichoptera: Polycentropodidae)Oecologia, 1977
- Factors Affecting Microdistribution of Stream Benthic InsectsOikos, 1977
- The Distribution of Two Predators and their Prey in an Iron Rich StreamJournal of Animal Ecology, 1976