Habitat preferences of aquatic Oligochaeta in a small highland stream (Czech Republic)

SCHENKOVÁ, Jana and Jan HELEŠIC. Habitat preferences of aquatic Oligochaeta in a small highland stream (Czech Republic) (Habitat preferences of aquatic Oligochaeta in a small lowland stream (Czech Republic)). In 9th International symposium on aquatic Oligochaeta. Programme & Abstracts. Wageningen, the Netherlands: University of Wageningen, 2003, p. 71-71, 104 pp.

Basic information

• Original name: Habitat preferences of aquatic Oligochaeta in a small highland stream (Czech Republic)
• Name in Czech: Habitatové preference vodních Oligochaeta v malých tocích (Česká republika)
• Authors: SCHENKOVÁ, Jana (203 Czech Republic, guarantor) and Jan HELEŠIC (203 Czech Republic).
• Edition: Wageningen, the Netherlands, 9th International symposium on aquatic Oligochaeta. Programme & Abstracts, p. 71-71, 104 pp. 2003.
• Publisher: University of Wageningen

Other information

• Original language: English
• Type of outcome: Proceedings paper
• Field of Study: 10600 1.6 Biological sciences
• Country of publisher: Netherlands
• Confidentiality degree: is not subject to a state or trade secret
• RIV identification code: RIV/00216224:14310/03:00009983
• Organization unit: Faculty of Science
• Keywords in English: aquatic Oligochaeta; habitat preference; multivariate analysis
• Tags: aquatic Oligochaeta, habitat preference, Multivariate analysis
• Tags: International impact

Abstract

Research was carried out to reveal the influence of stream hydrology and physico-chemical variables on the structure of the aquatic oligochaete assemblage. Quantitative samples were collected from the small lowland river Rokytná (the Thaya River basin) in the southern part of the Czech Republic. The oligochaete biomass (total wet weights of individuals per 1 m2) in selected habitats was compared by Wilcoxon Matched Pairs test, but no significant (p < 0.05) differences were found. Habitat preferences of oligochaete species were evaluated by Canonical Correspondence Analysis (CANOCO). BOD and NH4+ ion concentration were the most important variables explaining the distribution of oligochaetes along the first axis. Current velocity (at 60% of the depth) and water temperature were the most important variables along the second axis. Further significant variables (according to Monte Carlo permutation test) were the concentration of NO3- ions, conductivity, bottom velocity, and the concentration of PO43-. The amount of organic matter (BOD) and concentrations of important ions fluctuated mainly in course of time and thus represented the temporal pattern; current velocity explained the spatial pattern of oligochaete distribution.

Abstract (in Czech)

Výzkum byl zaměřen na zjištění vlivu hydrologie a fyzikálně chemických proměnných na strukturu tyxocenu Oligochaeta. Byl zjištěny zozdíly v ukazatelích abundance a biomasa a jejich vysvětlení bylo odvozeno od Canonical Correspondence Analysis (CANOCO). Množství rozložitekných organických látek a koncentrace amoniaku byly významné proměnné a v druhém pořadí pak rychlost proudění a teplota vody.

Links

• GA206/02/0902, research and development project: Name: Životní strategie meio-makrozoobentosu tekoucích vod

Investor: Czech Science Foundation, Life strategy of stream meio-macroinvertebrates

• MSM 143100010, plan (intention): Name: Časoprostorová dynamika biodiverzity v ekosystémech střední Evropy.

Investor: Ministry of Education, Youth and Sports of the CR, Spatiotemporal biodiversity dynamics in ecosystems of Central Europe