Naslov
Macrophyte vegetation of Kopački rit Nature Park (Eastern Croatia)

Autori
Alegro, Antun ; Rimac, Anja ; Šegota, Vedran

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

Izvornik
7th Croatian botanical symposium with international participation - Book of Abstracts / Vuković, Nina ; Šegota, Vedran - Zagreb : Hrvatsko Botaničko Društvo, 2022, 18-18

ISBN
978-953-8097-03-4

Skup
7. hrvatski botanički simpozij

Mjesto i datum
Zagreb, Hrvatska, 12.09.2022. - 14.09.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Danube floodplain ; Lemnetea ; Pannonian ecoregion ; Potametea ; wetland

Sažetak
Kopački rit is situated in eastern Croatia, northwest of the confluence of the Drava and the Danube, and it is one of the largest and most important fluvial-wetland areas in Europe. It was founded in 1973 as an Ornithological Reserve and in 1993 designated as Nature Park comprising the surface of 177 km2 . According to the „flood pulse concept“ flood areas are defined as aquatic/terrestrial transit zones where flood dynamic is the main factor shaping habitats and communities. In order to study diversity, composition and conditionality of macrophyte communities we have conducted research during three years on 15 preselected localities with different flood regimes. Regarding the vegetation, the researched localities can be divided into two groups, those with very lush macrophytic vegetation and those without or with very scarce vegetation, where the absence of direct influence of the flood waters of the Danube is the main factor enabling development of the macrophytic vegetation. The vegetation is developed in the area inside the main dyke, in very slow flowing or almost stagnant waters with moderate water level fluctuations. The vegetation belongs mainly to free-floating communities of the class Lemnetea intermixed with fragments of the rooted floating or submerged macrophytes from the class Potametea. The most widespread order belonging to the first class is Hydrocharition morsusranae with number of species as Hydrocharis morsus-ranae, Lemna minor, L. trisulca, L. minuta, Wolffia arrhiza, Spirodella polyrhyza, Utricularia vulgaris and ferns Salvinia natans and Azolla filiculoides. Representatives of rooted vegetation are Nymphoides peltata, Nuphar lutea and Nymphaea alba. Omnipresent is Ceratophyllum demersum. Considering occupied surfaces and populations sizes, Kopački rit is the largest and richest area in Croatia with macrophyte vegetation of shallow, eutrophic, slow flowing or stagnant waters. However, severe droughts in last years have negative influence on these habitats and its vegetation.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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