The invertebrate fauna of a forest stream and its association with fine particulate matter
作者:
M. J. Winterbourn,
期刊:
New Zealand Journal of Marine and Freshwater Research
(Taylor Available online 1982)
卷期:
Volume 16,
issue 3-4
页码: 271-281
ISSN:0028-8330
年代: 1982
DOI:10.1080/00288330.1982.9515970
出版商: Taylor & Francis Group
关键词: detritus;detritivores;streams;invertebrates;colonisation;Chironomidae;Plecopt‐era;Cass;artificial substrata;settlement;carnivores
数据来源: Taylor
摘要:
The invertebrate fauna colonising wooden blocks placed in a beech forest stream was studied over a period of 1 year. At least 31 species were taken during the course of the study, with 3 species of Chironomidae predominating numerically. Most species were associated principally with fine particulate matter (FPM) deposited on the upper surfaces of blocks, although a stonefly,Spaniocerca zelandica,was most abundant on the barer surfaces. Of the Chironomidae,Paucispinig‐era approximataandPolypedilum canumhad clearly defined life history patterns with emergence from February to April and October to January, respectively.Psectrocladiussp. had a poorly defined life history. Gut contents of 16 insect species showed that 4 were predominantly predatory, and the remainder were detritivores. The latter could be categorised as shredders (large particle detritivores) or collector‐browsers which mainly ingested particles in the dominant (<50 μm) size range. Oxygen consumption by fine stream sediments was similar at different times of year which suggests that the food quality of detritus may tie relatively constant at all times.
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