Microfauna of temporary stagnant waters

Borić, Ana (2015) Microfauna of temporary stagnant waters. Bachelor's thesis, Faculty of Science > Department of Biology.

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Abstract

Temporary waters are highly varied, widely distributed, and a dominant feature of our planet, occurring across virtually all continents and in all climate zones, however poorly studied ecosystems. They are essentially natural water bodies which pass trough a recurrent dry phase of varying duration. Temporary ponds are different from permanent onse in many features and their high amplitudes (light, temperature, concentration of dissolved oxygen and nutrients). Survival depends largely on extreme physiological tolerance and ability of effective migration. This paper gives an overview of adaptations and functioning of microfauna (protozoa, rotifers, cladocerans, copepods, nematodes, gastrotrichs, tardigrads) in temporary waters. The most significant environmental factor in the temporary waters is loss of water during the dry season. Dry period prevents aquatic organisms to complete their life cycle. Therefore, the species are adapted to these environmental conditions. Diapause is stage of complete stagnation, conditioned by the climate or genetic factors. Organisms decrease metabolic processes, thrown out the water and in this state can remain for several days, but also a few years.Temporary ponds are more threatened than permanent waters. Relatively small changes in the regional hydrological conditions can lead to major changes in the ecological regime of temporary ponds and their biocenosis.

Item Type: Thesis (Bachelor's thesis)
Supervisor: Špoljar, Maria
Date: 2015
Number of Pages: 16
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 13 Apr 2016 11:03
Last Modified: 13 Apr 2016 11:03
URI: http://digre.pmf.unizg.hr/id/eprint/4695

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