Perennial phenological patterns and ecology of caddisflies (Trichoptera, Insecta) and black flies (Simuliidae, Diptera, Insecta) at a tufa barrier

Orlović, Ana (2015) Perennial phenological patterns and ecology of caddisflies (Trichoptera, Insecta) and black flies (Simuliidae, Diptera, Insecta) at a tufa barrier. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

The composition and structure of insect communities (Insecta) in certain habitats is the result of variability of abiotic factors, and biotic relationships among organisms. Tufa barriers in the Plitvice Lakes National Park are characterized by diverse microhabitats, thus the community of aquatic insects is diverse and abundant. Adult caddisflies and blackflies were collected monthly over a six-year period (2008. – 2013.) using emergence traps. A total of 4729 individuals of caddisflies (37 species) and 11 166 individuals of blackflies (4 species) were collected. Tinodes rostocki was recorded in the Plitvice Lakes NP for the first time during this study. Largest proportion of caddisflies belongs to predators, followed by passive filter feeders. Larvae of all blackfly species also belong to passive filter-feeders, feeding on particulate organic matter. The highest number of individuals was recorded on moss that has proved to be the most suitable microhabitat for filter feeders. Most species of caddisflies in this study has emergence peak in the summer months, while the most common blackfly species, Simulium angustipes, emerges throughout the whole year. Long emergence period and the highest number of individuals collected in September was recorded for the endemic caddisfly Rhyacophila dorsalis plitvicensis. Thus, this is the longest and most detailed study of any aspect of ecology of this subspecies so far. Seasonal shift in emergence maximum of caddisfly and blackfly filter-feeders indicates the existence of interspecific competition between these two groups of insects.

Item Type: Thesis (Diploma thesis)
Keywords: passive filter feeders, emergence patterns, lake outlet, microhabitats
Supervisor: Previšić, Ana
Date: 2015
Number of Pages: 49
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Grozdana Sirotic
Date Deposited: 16 Apr 2015 09:31
Last Modified: 16 Apr 2015 09:31
URI: http://digre.pmf.unizg.hr/id/eprint/3815

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