20.500.12556/DKUM-78698 Funkcionalne poteze rastlinskih vrst s prehodno prisotnostjo v vegetaciji vrstno bogatih travišč Functional traits of transient plant species in species rich grassland communities Da bi lahko razumeli, kakšne so posledice izgube vrst v ekosistemu, moramo poznati kakšna je vloga posamezne vrste znotraj ekosistema. Eden izmed pristopov pri ugotavljanju vloge vrste v okolju je tudi model DST klasifikacije, ki smo ga uporabili v naši raziskavi. Temelji na razvrstitvi rastlinskih vrst v vegetaciji med dominantne, podrejene ali prehodne vrste, in sicer glede na njihovo relativno celokupno pokrovnost in stalnost. Prednostne vrste predstavljajo zelo majhen delež biomase v določenem habitatu, hkrati pa s poznavanjem njihovih morfološko funkcionalni potez (MFP) lahko napovedujemo, katere med njimi bodo v vegetaciji postale podrejene ali celo dominantne, v primeru, da pride do sprememb določenega okoljskega dejavnika, intenzitete motnje in/ali stresa ipd. Namen naše raziskave je bil analizirati in primerjati prehodne vrste v dveh asociacijah polnaravnih ekstenzivnih travišč: asociacije Onobrychido viciifolia-Brometeum in asociacije Scabioso hladnikianae-Caricetum humilis. Prehodnim rastlinskim vrstam smo določili prednosti habitat, indikatorske vrednosti po Ellenbergu in 13 MFP. Podatke smo analizirali z različnimi uni- in multivariatnimi metodami. Ugotovili smo, da se prehodne vrste obeh asociacij razlikujejo v naslednjih MFP: življenjski obliki, obliki rasti, višini rastlin, tipih vegetativnega razmnoževanja, vrednostih LDMC, SLA ter CSR strategijah. Razlike v lastnostnih prehodnih vrst asociacij lahko razložimo z razlikami v stičnih habitatih travišč asociacije, od koder te vrste izvirajo. Prehodne vrste obeh asociacij imajo najbolj poudarjeno kompeticijsko (C) strategijo, razlikujejo pa se v kombinaciji vpliva stresa in motnje. Iz tega lahko sklepamo, da bi se v obeh asociacijah ob spremembah, ki bi izboljšale rastne razmere (zmanjšanje motnje in/ali stresa), povečala številnost in pokrovnost tistim vrstam, ki imajo poudarjeno C – strategijo. Rezultati naše raziskave predstavljajo pomembno osnovo za morebitne prihodnje raziskave, v katerih bi povezovali specifične spremembe okolja s spremembami floristične in funkcionalne sestave obravnavanih tipov traviščne vegetacije. To understand the consequences of species loss in an ecosystem, we need to know the role of each species within the ecosystem. One of the approaches to determine the role of a species in the environment is the DST classification model that we used in our study. The model is based on the classification of plant species in vegetation as dominant, subordinate or transient species, according to their cumulative relative abundance and frequency. Transient species represent a very small part of the biomass in a given habitat. But by knowing their morphological-functional traits (MFT) we can predict which of the transient species will become a subordinate or even dominant species in the vegetation, in case of changes in a particular environmental factor, intensity of disturbance and/or stress. The main aim of our study was to analyse and compare transient species in two associations of semi-natural extensive grasslands: the Onobrychido viciifolia-Brometeum association and the Scabioso hladnikianae-Caricetum humilis association. We collected the following data for the transient species: habitat preference, Ellenberg’s indicator values and 13 MFTs. Data were analyzed using various univariate and multivariate methods. Transient species of the two associations differed in the following MFTs: life form, growth form, plant height, types of vegetative propagation, LDMC values, SLA values, and CSR strategies. Differences in the traits of transient species between the associations can be explained by differences in the contact habitats of the association from which these species originate. The transient species of both associations have the most pronounced competition (C) strategy, and differ in a combination of stress and disturbance influence. Thus, we can conclude that in both associations, changes that would improve growth conditions (reduction of disturbance and /or stress) would increase the number and coverage of species with strong C - strategy. The results of our study provide an important basis for possible future research in which we would link specific changes in the environment to changes in the floristic and functional composition of the grassland vegetation types considered. polnaravna suha travišča DST klasifikacija morfološko-funkcionalne poteze CSR strategije rastlin semi-natural dry grasslands DST classification morphological-functional traits CSR strategies true true false [A. Munda] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2021-02-10 10:02:17 2021-04-01 09:26:25 2022-08-09 19:20:22 2021-02-11 03:17:25 2021 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 581.55:633.2.03(043.2) 57471235 URN:SI:UM:DK:TUIQ4IJQ MAG_Munda_Ana_2021.pdf MAG_Munda_Ana_2021.pdf 1 8DC578F756A04E12FEEEE28A1EBADD09 14b2949f4bb0fb8645f63150ff7dfffa24f469a5ada07291198ef3e8d2421a34 115bb9a8-87d5-11eb-a289-00155d0001ca 20.500.12556/dkum/82db13ff-ab65-4ed4-9359-c2cb96a99978 https://dk.um.si/Dokument.php?lang=slv&id=149403 Fakulteta za naravoslovje in matematiko 0 0 0