Biološke i ekološke značajke invazivne vrste Dikerogammarus villosus

undergraduate thesis

• Title (english): Biological and ecological characteristics of invasive species Dikerogammarus villosus
• Author: Paula Šimunčić
• Mentor: Sandra Hudina (mentor)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2022, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Uspješno uspostavljene stabilne zajednice invazivnih makrobeskralješnjaka, posebno
rakušaca imaju snažan utjecaj na zavičajne bentoske zajednice slatkovodnih ekosustava. Na
mnogim su mjestima nadjačali ili čak u potpunosti zamijenili zavičajne vrste. Rakušac
Dikerogammarus villosus (Skowinsky, 1894) invazivna je strana vrsta iz porodice
Gammaridae koja se proširila iz ponto-kaspijskog područja nakon izgradnje kanala Rajna –
Majna – Dunav 1992. godine sve do zapadne Europe. Južnim koridorom stigao je i u Hrvatsku
gdje se iz Dunava proširio u velike hrvatske rijeke crnomorskog slijeva. Jedna od važnih
karakteristika vrste je eurivalentnost, odnosno tolerancija na česte promjene okolišnih
čimbenika kao što su temperatura, salinitet i koncentracija otopljenog kisika, što se pokazalo
značajnim za širenje vrste uzvodno, bilo pričvršćivanjem za trup plovila ili preko balastnih
voda. Kratko generacijsko vrijeme, brzi rast i razvoj, rano spolno sazrijevanje, velika
reproduktivna sposobnost i izrazito grabežljivo ponašanje omogućile su vrsti da u vrlo
kratkom vremenu postane dominantna u europskim kopnenim vodama gdje utječe na
ravnotežu i biološku raznolikost ekosustava

Abstract (english)

Successfully established communities of invasive macroinvertebrates, especially
gammarids, have a strong impact on indigenous benthic communities of freshwater
ecosystems. Upon their establishment in a novel environment, the frequently displace
indigenous species. Dikerogammarus villosus (Skowinsky, 1894) is an invasive alian species
from the family Gammaridae which spread from the Ponto-Caspian area after the construction
of the Rhine-Main-Danube canal in 1992 all the way to the Western Europe. It also reached
Croatia via the Southern Corridor, where it spread from the Danube into the large Croatian
rivers of the Black Sea basin. One of the most important characteristics of the species is its
eurivalence, also known as tolerance to frequent changes of environmental factors such as
temperature, salinity and dissolved oxygen concentration, which enabled the spread of species
all over Europe, either by attaching to the hull or over ballast water. Short generation time,
rapid growth and development, early sexual maturation, high reproductive ability and
extremely predatory behavior have enabled the species to become dominant in European
inland waters in a very short amount of time where it affects the balance and biodiversity of
the ecosystem.

• Keywords: rakušci; invazivne vrste; slatkovodni ekosustavi
• Language: croatian
• URN:NBN: urn:nbn:hr:217:796645
• Study programme: Title: Ecology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) biologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) biologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-07-25 07:32:13