The Biology and Ecology of Co-Existing Species of Polycentropus (Trichoptera: Polycentropodidae) in a Michigan Bog Lake

Bibliographic Details
Main Author:	Anderson, Alice J. Loesch
Language:	English
Published:	Bowling Green State University / OhioLINK 1979
Subjects:	Biology
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1566463066607907

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-bgsu15664630666079072021-08-03T07:12:54Z The Biology and Ecology of Co-Existing Species of Polycentropus (Trichoptera: Polycentropodidae) in a Michigan Bog Lake Anderson, Alice J. Loesch Biology An analysis of the life history, morphology, behavior and niche separation of coexisting species of Polycentropus caddisflies was performed on data collected over three years, 1976, 1977, and 1978. Collections were made from a bog lake to simplify the potential interactions in the community. It was found from adult emergence data that three species were present, P. interruptus, P. remotus, and P. flavus, and that differing emergence time was adequate to separate the niche of only P. flavus from the other two species. From analysis of the larval collection data, it was found that P. interruptus dominated at stations which were in open water and free from vegetation, and that P. remotus larvae dominated at stations close to shore, or in deep flocculent peat with vegetation. Further analysis of these differences showed that P. remotus actually had two color types, one with spots on the parietal sclerites of the head, and one without, and that these two color types were separated by differential utilization of substrate. In multivariate analyses of morphological characters and two environmental characters, it was found that P. interruptus and P. remotus were most clearly separated morphologically by a difference in setal pattern on the pronotum. P. interruptus, and the two color variants of P. remotus were separated most clearly by setal pattern on the pronotum, color pattern, and collection site. From observational data, it is hypothesized that the P. interruptus larvae utilized a deeper level within the detritus for net-building and feeding as well as pupating than did the dark color variant of P. remotus. If P. interruptus were able to tolerate lower O2 conditions found within the detritus, an interesting and unusual niche separating mechanism would be exemplified for lentic species. Scanning electron microscopy and gut analysis yieled inconclusive results. No differences were found in the net structure and attachment sites between species, but subtle differences in mouthpart structure were found. Gut analysis indicated that P. interruptus was more exclusively a predator, and more often a predator of Chironomidae. 1979 English text Bowling Green State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1566463066607907 http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1566463066607907 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Biology
spellingShingle	Biology Anderson, Alice J. Loesch The Biology and Ecology of Co-Existing Species of Polycentropus (Trichoptera: Polycentropodidae) in a Michigan Bog Lake
author	Anderson, Alice J. Loesch
author_facet	Anderson, Alice J. Loesch
author_sort	Anderson, Alice J. Loesch
title	The Biology and Ecology of Co-Existing Species of Polycentropus (Trichoptera: Polycentropodidae) in a Michigan Bog Lake
title_short	The Biology and Ecology of Co-Existing Species of Polycentropus (Trichoptera: Polycentropodidae) in a Michigan Bog Lake
title_full	The Biology and Ecology of Co-Existing Species of Polycentropus (Trichoptera: Polycentropodidae) in a Michigan Bog Lake
title_fullStr	The Biology and Ecology of Co-Existing Species of Polycentropus (Trichoptera: Polycentropodidae) in a Michigan Bog Lake
title_full_unstemmed	The Biology and Ecology of Co-Existing Species of Polycentropus (Trichoptera: Polycentropodidae) in a Michigan Bog Lake
title_sort	biology and ecology of co-existing species of polycentropus (trichoptera: polycentropodidae) in a michigan bog lake
publisher	Bowling Green State University / OhioLINK
publishDate	1979
url	http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1566463066607907
work_keys_str_mv	AT andersonalicejloesch thebiologyandecologyofcoexistingspeciesofpolycentropustrichopterapolycentropodidaeinamichiganboglake AT andersonalicejloesch biologyandecologyofcoexistingspeciesofpolycentropustrichopterapolycentropodidaeinamichiganboglake
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The Biology and Ecology of Co-Existing Species of Polycentropus (Trichoptera: Polycentropodidae) in a Michigan Bog Lake

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