Usporedba krenobiocenoza dvaju izvora rijeke Gacke

master's thesis

• Title (english): Comparison crenobiocoenosis between two river Gacka springs
• Author: Ivana Mišerić
• Mentor: Sanja Gottstein (mentor)
• Committee member: Sanja Gottstein (predsjednik povjerenstva)
• Committee member: Duje Lisičić (član povjerenstva)
• Committee member: Božena Mitić (član povjerenstva)
• Committee member: Petar Kružić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2017-05-25, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Krški izvori jedinstvenog su sastava zajednica beskralježnjaka, specifične strategije kruženja hranjivih tvari te različite morfologije. Zbog svega navedenog, unutar recentnih ekoloških koncepcija, smatramo ih zasebnim ekosustavima. Oba istraživana izvora Gacke, Majerovo i Tonkovića vrilo, pripadaju krškim limnokrenim ili ujezerenim tipovima izvora. Jednogodišnje sezonsko istraživanje provedeno je od siječnja do listopada 2014. godine te su prikupljeni uzorci prema modificiranom AQEM protokolu u svrhu određivanja sastava zajednica i abundancije makrozoobentosa. Ukupno je prikupljeno 70 poduzoraka na dominantnom anorganskom i organskom supstratu duž 100 metara izvorišnog područja svakog izvora. Osnovni fizikalno-kemijski parametri stabilni su na oba izvora i značajno se razlikuju. Godišnje oscilacije temperature vode u oba izvora ne prelaze 1 °C, potrdivši tipične uvjete eukrenala. Dominantni organski supstrat bio je fital s makrofitskom vodenom vegetacijom, dok je dominantni anorganski supstrat bio psamopelal. Analiza sastava zajednica makrozoobentosa pokazuje dominantnost skupina jednakonožnih rakova (Isopoda) i rakušaca (Amphipoda) na oba istraživana izvora. Prema sastavu, gustoći i raznolikosti makrozoobentosa i analiziranim fizikalno-kemijskim parametrima vode oba izvora su ocijenjena s dobrom kvalitetom vode. Podaci o istraživanim i susjednim izvorima esencijalni su za procjenu bogatstva vrsta i produktivnosti u cijelom porječju kao i izoliranim porječjima rijeke Gacke.

Abstract (english)

Karstic springs are unique in their composition of invertebrate communities, having specific strategies of nutrient cycling, as well as having diverse morphology. For all of these reasons, within recent ecological concepts, they are considered to be separate independent ecosystems. Both investigated karstic springs of the Gacka River, Majerovo and Tonkovića Vrilo, are characterized as limnocrenous or lake-like springs. A year-round seasonal investigation was conducted from January to October 2014 and samples were taken according to modified AQEM protocol in order to assess the macrozoobenthos community assemblages and abundance. In total 70 subsamples of macrozoobenthos were collected at dominant inorganic and organic substrates along the 100 meters of the each spring head. All physicochemical parameters were significantly different between springs. Annual water temperature oscillations in both springs did not exceed 1 °C, confirmed typical eucrenal conditions. The dominant organic substrate was phytal with submerged macrophytes, while the dominant inorganic substrate was psamopelal. Macroinvertebrate community composition indicates a clear domination of isopod and amphipod crustaceans on both springs. According to macroinvertebrate composition, abundance, species diversity and analyzed physicochemical water properties, the water quality of the both springs was assessed as a good. Information on researched and neighboring springs are essential for estimates species richness and productivity in the whole Gacka River catchment as well as in the each subcatchment.

• Keywords: krški izvori; makrozoobentos; rijeka Gacka; Majerovo Vrilo; Tonkovića Vrilo
• Keywords (english): karst springs; macrozoobenthos; river Gacka; Majerovo vrilo; Tonkovića vrilo
• Language: croatian
• URN:NBN: urn:nbn:hr:217:704987
• Study programme: Title: Experimental Biology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra eksperimentalne biologije (magistar/magistra eksperimentalne biologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2019-05-25
• Created on: 2017-07-14 08:49:04