Raznolikost i ekološke značajke ravnokrilaca (Insecta: Orthoptera) travnjačkih staništa planine Medvednice

master's thesis

• Title (english): Diversity and ecological features of orthopterans (Insecta: Orthoptera) in grassland habitats of the Medvednica mountain
• Author: Alan Martin Rašić
• Mentor: Mladen Kučinić (mentor)
• Committee member: Mladen Kučinić (predsjednik povjerenstva)
• Committee member: Zdravko Dolenec (član povjerenstva)
• Committee member: Antun Alegro (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2013, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Ovo istraživanje ravnokrilaca prvo je ovakvoga tipa, ne samo na Medvednici, nego i u Hrvatskoj uopće. Zbog njihove osjetljivosti na promjene strukture i sastava vegetacijskog pokrova u travnjačkim ekosustavima, ravnokrilci se mogu potencijalno upotrijebiti za bioindikaciju nastalih ekoloških poremećaja povezanih sa čovjekovom uporabom zemlje. Primarni cilj ovoga rada bio je istražiti utjecaj košnje i ispaše na raznolikost, abundanciju i sastav zajednica ravnokrilaca u travnjacima Medvednice i na temelju tih pokazatelja vrednovati njihov bioindikatorski potencijal. Dodatni ciljevi bili su izvršiti analizu sastava faune i strukture zajednica ravnokrilaca te utvrditi udio jedinki inficiranih makroskopski vidljivim parazitima iz koljena Nematomorpha. Istraživanje je provedeno 2008 – 2009. godine tijekom 5 mjeseci, na 10 lokaliteta sa različitim režimima košnje i ispaše. Rezultati su pokazali relativno visok potencijal zajednica ravnokrilaca kao ekoloških indikatora i biomonitora, tj. travnjaci sa supraanualnim ciklusom košnje pokazali su znatno veću heterogenost i bogatstvo vrsta, a manju abundanciju ravnokrilaca u odnosu na košanice i pašnjake. Višestruko povećanje abundancije na košanicama i pašnjacima javilo se uslijed gradualnog povećanja populacijskih gustoća nekolicine stanišnih generalista, ponajprije vrste Pseudochorthippus parallelus, te vrsta Glyptobothrus biguttulus i Glyptobothrus brunneus.

Abstract (english)

The study on orthopterans on Medvednica mountain and Croatia in general is one of the first of it’s kind. Nowadays, orthopterans are widely used as bioindicators in grassland habitats due to their sensibility on changes in vegetation structure, composition and anthropogenic pressure in general. Primary objective of this study was to determine the effect of mowing and pasturing regime on diversity, abundance and composition of orthopteran communities on grasslands of Mt. Medvednica, according to which their bioindicative potential could be established. Additional task was to analyse composition and structure of orthopteran communities, together with estimation of percentage of infected specimens with representatives of phylum Nematomorpha. Study was conducted in period 2008 – 2009 during five months, on 10 localities which differed in mowing and pasturing regimes. Results indicated relatively high potential of orthopterans as ecological indicators and biomonitors in grasslands on Mt. Medvednica. Compared to the regularly pastured and mowed localities, on grasslands with supraannual regimes of mowing higher heterogeneity and richness of orthopteran species was determined, but with lower abundance. Multiple increase of abundance of orthopterans on pasture and mowing grasslands occurred due to increase of couple of typical habitat generalist species like Pseudochorthippus parallelus, Glyptobothrus biguttulus and Glyptobothrus brunneus.

• Keywords: biotička homogenizacija; bioindikatori; antropogeno-zoogeni utjecaj; stanišni generalisti
• Keywords (english): biotic homogenization; bioindicators; anthropogenically-zoogenic activities; habitat generalists
• Language: croatian
• URN:NBN: urn:nbn:hr:217:579698
• Study programme: Title: Biology; specializations in: Ecology; Course: Ecology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra biologije (magistar/magistra biologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-04-26 11:47:37