Naslov
Utjecaj uređivanja vodotokova na staništa dabra u Hrvatskoj
(The effect of regulating stream flows on the beaver habitat in Croatia)

Autori
Grubešić, Marijan ; Margaletić, Josip ; Tomljanović, Kristijan ; Vucelja, Marko

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

Izvornik
Book of abstracts / Ulevičius, Alius - Kaunas : Vilnius University, Vytautas Magnus University, 2009, 57-57

ISBN
978-9955-12-507-5

Skup
5th International Beaver Symposium

Mjesto i datum
Dubingiai, Litva, 20.09.2009. - 23.09.2009

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Dabar; Stanište; Hrvatska
(beaver; streamflows; Croatia)

Sažetak
Beaver adjusts well to all the changes in its habitat on condition that food and water is provided throughout the year. In some cases beaver inhabits areas with very few food resources. The fact that beavers unexpectedly choose some quite unusual habitats to settle on was in fact the reason for doing the research on these seemingly marginal habitats in the first place. Although in Croatia there is a fair amount of well preserved habitats, some smaller stream flows are permanently being regulated, and that's which has to a higher or a lesser degree diminished their natural quality. In order to establish the real effect of stream flow regulation on the beaver habitat, research was made on 9 rivers in Central Croatia and it consisted of fieldwork and mapping the stream flows. As a control method we used topographic maps 1:25.000 and satellite photos provided by Google Earth. 938 km of stream flows were inspected on 9 km of rivers. It was recorded that natural vegetation covers 70% of those stream flows. 18% of stream flows were previously regulated (leveling beds, building dams etc.), but, due to ecological succession, herbaceous and ligneous vegetation - which we named "successive vegetation" - recovered and made it possible for the beaver to inhabit those terrains once again. On those parts of stream flows, beavers are commonly present, but there is also a danger of them getting hurt or forced out beacause of the stream flow regulation that periodically takes place. Some time after the stream flow regulation, beavers cannot settle on those terrains because they have no vegetation. The stream flows that are regulated every year, cannot be inhabited by beaver at all. Instructions that can be given to the company that conducts the stream flow regulations are not to remove the vegetation directly on the banks or inside the 5m perimeter. That would provide the conditions for the beavers, birds and other semi aquatic animal species. It would also prevent water temperature from rising and enrich the water with oxygen. Those instructions are being partly accepted, but in the future they should be applied on the majority of regulated stream flows.

Izvorni jezik
Engleski

Znanstvena područja
Šumarstvo

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