doktorska disertacija
Vesna Petkovska (Author), Gorazd Urbanič (Mentor), Matjaž Mikoš (Co-mentor)

Abstract

Ugotavljali smo vpliv hidromorfoloških spremenljivk različnih ravni na združbe bentoških nevretenčarjev (BN) v vodotokih Slovenije in ekoregij: Alpe, Dinaridi in Panonska nižina. Uporabili smo podatke o združbah BN s 302 mest vzorčenja, pridobljenih med leti 2005 in 2011. Za vsako mesto vzorčenja smo zbrali podatke o 49 okoljskih spremenljivkah in jih razvrstili v štiri skupine: raba tal, regionalne pokrajinske značilnosti (tipologija), lastnosti kakovosti rečnih habitatov (RHQ) in lastnosti spremenjenosti rečnih habitatov (RHM). Povezave med združbami BN in okoljskimi spremenljivkami smo ugotavljali s kanonično korespondenčno analizo (CCA). S spremenljivkami RHQ smo večinoma pojasnili precej večji delež variabilnosti združb BN kot s spremenljivkami RHM. Ugotovili smo razlike v pomembnosti okoljskih spremenljivk glede na ekoregijo. Porazdelitev pojasnjene variabilnosti združb BN med skupine okoljskih spremenljivk smo ugotavljali s parcialno CCA (pCCA). Dobro smo razlikovali med vplivi tipoloških spremenljivk ter RHQ in RHM spremenljivk. Tipološke spremenljivke do neke mere oblikujejo procese na nižjih ravneh, vendar je velik delež zgradbe združb BN odvisen od lastnosti kakovosti habitata ne glede na tipološke dejavnike. S pCCA med spremenljivkami rabe tal in ostalimi skupinami okoljskih spremenljivk smo največje presečne deleže pojasnjene variabilnosti združb BN ugotovili s tipološkimi spremenljivkami. Dobro smo lahko ločili med vplivi rabe tal ter lastnostmi kakovosti in spremenjenosti rečnih habitatov na združbe BN. Na podlagi ekološko pomembnih morfoloških spremenljivk smo za štiri glavne evropske regije določili vodilno sliko rečnih habitatov, ugotovili značilne razlike med alpsko, nižinsko, mediteransko in kraško regijo ter podali usmeritve za upravljanje z ekosistemi tekočih voda. Preverili smo še povezanost kombinacij že prej analiziranih morfoloških spremenljivk z združbami BN in večinoma z njimi pojasnili večji delež variabilnosti združb BN kot s posameznimi spremenljivkami morfoloških značilnosti.

Keywords

vodne direktive;hidromorfologija;bentoški nevretenčarji;raba tal;

Data

Language: Slovenian
Year of publishing:
Typology: 2.08 - Doctoral Dissertation
Organization: UL BF - Biotechnical Faculty
Publisher: [V. Petkovska]
UDC: 574.5:591.524.1(497.4)(043.3)=163.6
COBISS: 4214438 Link will open in a new window
Views: 473
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Other data

Secondary language: English
Secondary title: ǂThe ǂinfluence of hydromorphological characteristics of Slovenian rivers on benthic invertebrate assemblages
Secondary abstract: The influence of hydromorphological variables on benthic invertebrate (BI) assemblages was studied in Slovenian rivers and ecoregions Alps, Dinaric western Balkan and Pannonian Lowland. Data on BI assemblages were obtained from 302 sampling sites between the years 2005 and 2011. For each sampling site data on 49 environmental variables were collected and were assigned to four environmental variable groups: regional natural characteristics (typology), land use, river habitat quality variables (RHQ), and river habitat modification variables (RHM). The relation of environmental variables on BI assemblages was analyzed using canonical correspondence analysis (CCA). In general, RHQ variables explained higher share of BI assemblages% variability than RHM variables. The importance of environmental variables was dependent on ecoregion. The explained variability of BI assemblages was devided among groups of environmental variables using partial CCA. The effects of tipological variables and RHQ or RHM variables were well discerned. Tipological variables constrain the processes on smaller scales, but a considerable part of BI assemblage composition is dependent on habitat quality features irrespective of typological characteristics. pCCA between land use variables and other environmental variable groups showed the highest joint effects of explained variability of BI assemblages with tipological variables. We have well discerned among land use effects and RHQ or RHM variables on BI assemblages. Using ecologically relevant morphological variables the guiding images of river habitats of four major European regions were defined. Significant differences were observed among river habitats of alpine, lowland, mediterranean and karst region, and guidance for river management was presented. The relationship between BI assemblages and different combinations of previously used morphological variables was also analysed and generally more variability of BI assemblages was explained than with individual morphological variables.
Secondary keywords: water framework directives;hydromorphology;benthic invertebrates;land use;
URN: URN:NBN:SI
Type (COBISS): Doctoral dissertation
Thesis comment: Univ. v Ljubljani, Biotehniška fak.
Pages: XVII f., 155, [16] str.
ID: 11587445