Naslov
What can macrophytes tell us about the ecological status of freshwaters?

Autori
Alegro, Antun

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
SiSB simpozij studenata bioloških usmjerenja - Knjiga sažetaka / Stremšek, Sara ; Kosier, Andrea - Zagreb : Udruga studenata biologije BIUS, 2021, 18-19

Skup
6. simpozij studenata bioloških usmjerenja (SiSB 2021)

Mjesto i datum
Zagreb, Hrvatska, 22.05.2021. - 23.05.2021

Vrsta sudjelovanja
Plenarno

Vrsta recenzije
Domaća recenzija

Ključne riječi
aquatic vegetation, ecological status, Dinaric ecoregion, Pannonian ecoregion

Sažetak
By joining the European Union, Croatia has become obliged to regularly report on the ecological status of its waters as required by the "Water Framework Directice". The ecological status is determined based on several biological elements, and one of these are aquatic plants - macrophytes. They include vascular plants, mosses and macroalgae. However, there was almost no data on macrophytic vegetation of Croatia, its distribution, species composition and their response to environmental factors. Therefore, an extensive field survey of aquatic vegetation was performed over several years at about 600 sampling-points including all types of natural and artificial streams and lakes. At each locality, all aquatic and bank species were recorded, their abundance was estimated by the methodology standard in vegetation research, and additional data related to the characteristics of the water body and the immediate environment were recorded. Data on physico-chemical parameters were collected on a monthly basis. Based on this, the responses of species to the environmental conditions were analysed, communities occuring in undisturbed conditions were defined as well as their change with the degradation of the environment. This enabled the developement of a numerical system for assessing the ecological status of water bodies based on macrophytes. The analyses showed a significant difference between the Dinaric and Pannonian ecoregions. The streams and stagnant waters of the Dinaric ecoregion are in a better ecological status than those in the Pannonian ecoregion, where they have significant depletion of aquatic vegetation. The results indicate that Croatia is facing important challenges regarding the protection, conservation and restoration of freshwater ecosystems.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA