Macrozoobenthos in submerged macrophyte stands of Papuk Nature Park

Šneller, Denis (2011) Macrozoobenthos in submerged macrophyte stands of Papuk Nature Park. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

Investigation of macrozoobenthos in Jankovac Stream (Papuk Nature Park) was conducted from July 2008 to June 2009. Samples were collected in littoral zone of two artificial accumulations covered with submerged macrophytes. Impact of abiotic and biotic parameters on macrozoobenthos diversity, abundance, size and trophic structure was analysed. Main hypothesis in this study was that food resources would affect composition of macrozoobenthos community. Thus main goals of this study were to analyse: 1. physico-chemical parameters and food resources; 2. abundance and diversity of macrozoobenthos in lentic biotopes of Jankovac Stream; 3. size structure of macrozoobenthos; 4. functional feeding guilds of macrozoobenthos. Analyzed physico-chemical parameters, food resources, diversity, abundance, size structure (abundance) as well as functional feeding guilds didn’t show statistically significant spatial differences (P > 0.05). Therefore, abiotic and biotic parameters were discussed through seasonal changes. Statistically significant seasonal oscillations of physico-chemical parameters were recorded for: temperature, dissolved oxygen concentrations, conductivity, alkalinity and nitrate concentrations. In total, 32 taxa were determined, whereas highest diversity of macrozoobenthos was recorded in summer (8 ± 1 taxa). Total abundance was ranged from 400 to 3480 ind/m2. Highest contribution in macrozoobenthos abundance (80 %) reached taxa Pisidium sp. (Bivalvia), Gammarus fossarum (Amphipoda) and Cloeon sp. (Ephemeroptera). In spring and summer size categories I and II (0.5 – 5 mm) dominated in abundance, while size category from 5.1 to 8 mm (III) achieved greatest contribution in autumn. Significant correlation among size category IV and size categories I and II (r = 0.6, P < 0.05) indicates on predator-prey relationship. In lentic parts of Jankovac stream detritivores, shredders and active filtrators dominated. Positive correlations (r = 0.53 to 0.69; P < 0.05) of these functional feeding guilds with organic matter in benthos indicate that detritus and leaf litter were main food resources for analyzed macrozoobenthos community. Result of this study suggests that interaction among food resources and other biotic factors significantly affected seasonal changes in diversity, abundance, size and trophic structure of macrozoobenthos in submerged macrophyte stands.

Item Type: Thesis (Diploma thesis)
Keywords: diversity, abundance, detritus, functional feeding guilds, size structure
Supervisor: Špoljar, Maria
Co-supervisor: Miliša, Marko
Date: 2011
Number of Pages: 37
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Grozdana Sirotic
Date Deposited: 09 Jun 2014 08:46
Last Modified: 18 Sep 2014 11:44
URI: http://digre.pmf.unizg.hr/id/eprint/2300

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