Spolni dimorfizem kranjske kozje češnje (Rhamnus fallax Boiss.) na območju Kamniško-Savinjskih Alp

diplomsko delo - univerzitetni študij

Jan Čugalj (Author), Robert Brus (Mentor), Kristjan Jarni (Co-mentor)

Abstract

Kranjska kozja češnja (Rhamnus fallax Boiss.) je značilna kalcifilna in pionirska grmovna vrsta. Razširjena je od jugovzhodnega obrobja Alp po Balkanskem polotoku vse do Grčije in Bolgarije. Cilji raziskave so bili ugotoviti razmerje med spoloma v populacijah, obstoj morfološke variabilnosti, vpliv okoljskih dejavnikov na variabilnost vrste ter obstoj morebitnega spolnega dimorfizma. Na območju Kamniško-Savinjskih Alp smo izbrali 6 vzorčnih ploskev. Za ugotovitev spolne strukture populacij smo v analizo zajeli 547 grmov. Za podrobnejšo morfometrijsko analizo smo od teh izbrali 180 grmov s katerih smo nabrali 1620 listov. Ugotovili smo, da je na vseh raziskovalnih ploskvah delež moških osebkov večji od deleža ženskih. V povprečju je moških rastlin skoraj dvakrat več (49,31 %) od ženskih (27,33 %), preostalim grmom (23,36 %) pa spola ni bilo možno določiti. Hierarhični poskus smo izvedli z namenom, da bi prikazali vpliv posameznih dejavnikov (višinskih pasov, ploskev, spolov, grmov) na variabilnost proučevanih znakov. Na skupno variabilnost listov je imel največji vpliv položaj znotraj grma, na skupno variabilnost grmov pa razlike med grmi. Vpliv spola na variabilnost grmov in listov je bil najmanjši. Z metodo glavnih komponent smo analizirali povprečne vrednosti znakov za moške in ženske osebke. Moški grmi so imeli v primerjavi z ženskimi na večini ploskev nekoliko večje liste. Velikost listov je bila pri vseh ploskvah podobna, pri tem je izrazito izstopala le ploskev III, ki se je nahajala na bolj suhem rastišču s kamnitimi tlemi ter vetru izpostavljeni legi.

Keywords

Rhamnus fallax Boiss.;kranjska kozja češnja;spolni dimorfizem;morfometrijska analiza;Kamniško- Savinjske Alpe;

Data

Language:	Slovenian
Year of publishing:	2015
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[J. Čugalj]
UDC:	63018:63017(043.2)=163.6
COBISS:	4172454
Views:	441
Downloads:	126
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Sexual dimorphism of Rhamnus fallax Boiss. in the region of Kamnik-Savinja Alps
Secondary abstract:	Rhamnus fallax Boiss. is a distinctive calciphyte and pioneer species. It ranges from southeastern outskirts of Alps throughout the Balkan Peninsula to Greece and Bulgaria. The goals of this study were identification of the sex ratio of the sampled populations, existence of morphologic variability, influence of environmental factors on variability and occurrence of eventual sexual dimorphism in this species. We selected 6 populations in the region of Kamnik-Savinja Alps. To determine the sex ratio of the populations we analyzed 547 shrubs. Out of those we selected 180 specimens from which we gathered 1620 leaves for detailed morphometric analysis. We have found that the sex ratio was male biased in all populations. On average there were approximately twice as many males (49,31 %) as females (27,33 %), however the sex determination was not possible on the remaining share of the shrubs (23,36 %). We preformed a hierarchical test with intention to show the influence of individual factors (altitudinal belt, population, sex, specimen) on the variability of the measured characteristics. The greatest influence on the overall variability of leaves came from the intra-specimen level and the greatest influence on the overall variability of shrubs came from the specimen level. The sex status of shrubs had the weakest influence on variability of leaves and shrubs. We preformed principal component analysis on the average values for all characteristics on male and female plants. In most populations male shrubs had somewhat larger leaves than females. Average leaf size was relatively similar among analyzed populations, with the exception of population III, which was located in dryer wind exposed habitat with rocky soil.
Secondary keywords:	Rhamnus fallax Boiss.;Carniolan buckthorn;sexual dimorphism;morphometric analysis;Kamnik-Savinja Alps;
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Ljubljani, Biotehniška fak., Oddelek za gozdarstvo in obnovljive gozdne vire
Pages:	IX, 66 f., [2] f. pril.
ID:	11539746