Ekološke značajke i emergencija obalčara (Insecta, Plecoptera) duž oligotrofnog hidrosustava

master's thesis

• Title (english): Ecological features and emergence patterns of stoneflies (Insecta, Plecoptera) along an oligotrophic hydrosystem
• Author: Anamarija Ridl
• Mentor: Marija Ivković (mentor)
• Committee member: Marko Miliša (član povjerenstva)
• Committee member: Danijel Orešić (član povjerenstva)
• Committee member: Blanka Cvetko Tešović (član povjerenstva)
• Committee member: Silvija Černi (član povjerenstva)
• Committee member: Neven Bočić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2018-05-14, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Sastav zajednice obalčara (Plecoptera, Insecta) važna je komponenta slatkovodnih ekosustava, osobito tekućica. Obalčari su važni pokazatelji kakvoće vode budući da se radi o skupini izrazito osjetljivoj na zagađenje. Tijekom dvogodišnjeg razdoblja, od veljače 2007. do prosinca 2008. godine, istraživane su emergencijske značajke obalčara na devet postaja u Nacionalnom parku Plitvička jezera. Odrasle jedinke su mjesečno uzorkovane emergencijskim klopkama, pri čemu je sakupljeno ukupno 14155 jedinki. Pronađene su 33 vrste iz 4 porodice. Veći broj vrsta, ali manji broj jedinki zabilježen je tijekom 2008. godine. Najveće razlike u trofičkoj strukturi zajednica, kao i longitudinalnoj distribuciji jedinki različitih vrsta zabilježene su niz longitudinalni gradijent od izvorskih lokacija do lokacije na rijeci Korani, što je primarno povezano sa razlikama u fizikalno-kemijskim čimbenicima vode. Najvažniji čimbenici bili su temperatura vode i pH. Većina zabilježenih vrsta je univoltina, no neke, poput vrste Nemurella pictetii, pokazuju naznake bivoltinosti. Vrhunac emergencije zabilježen je tijekom travnja i svibnja. Statistički značajna pozitivna korelacija brojnosti jedinki i brzine strujanja vode utvrđena je za vrste Protonemura auberti, P. intricata i P. praecox. Amphinemura triangularis, Protonemura intricata i P. praecox bile su izrazito sklone mahovinskim staništima, a vrlo slabo ili uopće nisu naseljavale makrofite na pjeskovitoj podlozi.

Abstract (english)

Stoneflies (Plecoptera, Insecta) are important components of freshwater assemblages, especially in running waters. Stoneflies are important water quality indicators since they are one of the most sensitive groups of freshwater invertebrates to water pollution. This study was conducted in Plitvice Lakes National Park. Adults were collected monthly from February 2007 until December 2008 using pyramid-type emergence traps at 9 locations. A total of 14155 individuals belonging to 33 species were recorded. Higher number of species, but lower abundance of stoneflies was recorded during 2008. Considerable differences in trophic structure of stonefly communities and longitudinal distribution of species were recorded along a longitudinal gradient of studied sites, primarily related to differences in physical and chemical parameters of water. The most important parameters were water temperature and pH. Most of recorded species were univoltine, but some species, as Nemurella pictetii, showed signs of bivoltinism. Emergence peaks were recorded during April and May. A statistically significant positive correlation between the abundances and flow velocity of water was found for Protonemura auberti, P. intricata and P. praecox. Amphinemura triangularis, Protonemura intricata and P. praecox preferred moss-mats habitats. Furthermore, they scarcely inhabited macrophytes on the sandy substrate or were not present at all.

• Keywords: Plitvička jezera; fenologija; temperatura vode; protok vode; trofička struktura; longitudinalna distribucija; mikrostaništa
• Keywords (english): Plitvice Lakes; phenology; water temperature; water discharge; trophic structure; longitudinal distribution; microhabitats
• Language: croatian
• URN:NBN: urn:nbn:hr:217:212262
• Study programme: Title: Enviromental Sciences; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra struke znanosti o okolišu (magistar/magistra struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-07-09 07:46:41