10th Symposium on the Flora of Southeastern Serbia and ...

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10 th <strong>Symposium</strong> on the Flora of Southeastern Serbia and Neighbouring regions,Vlasina 17 to 20 June 2010Population on edge: life history traits in a high altitudepopulation of dog's mercuryCvetković, D. 1 , Jovanović, V. 1 , Rubinjoni, L. 1 , Novčić, R. 2 , Komatović, S. 21 Biološki fakultet, Univerzitet u Beogradu, Srbija2 Nacionalni park Kopaonik, Srbijagvaihir@gmail.comDog’s mercury, Mercurialis perennis L. (Euphorbiaceae), is a dioecious,rhizomatous, perennial species, widely distributed in temperate regions of Europe.Its altitudinal range extends from sea level to more than 1600m asl. Mercurialisperennis is considered an indicator of ancient woodland. Though described as verytolerant of low light, it can be found, though rarely, growing in full light; previoiusstudies indicated that this could result in decreasing height and mass of shoots. Theaim of this study was to examine variation in life history traits in a population of M.perennis from Mt Kopaonik, occupying an exposed grassland at the altitude of1730m, near the upper boundary of its altitudinal range. Samples were taken inspring 2009, and the following traits were analysed in male and female individuals:plant size (above-ground height), shoot mass, number of flowers per plant, numberof leaves per plant and the extent of reproductive allocation (RA). Female plantswere higher than male plants, contrary to previously reported trend in otherpopulations. Mean number of leaves did not differ between sexes. The estimated RAvalues were significantly greater in females than in males, showing that femalesinvested more in reproduction. Both males and females from this population weresignificantly smaller compared to individuals from populations at lower altitudes(800 and 1540m asl) and different habitat (beechwood). However, female biasedsize dimorphism recorded in this sample should be taken with caution, since someissues (such as habitat heterogeneity and bimodal distribution of size of male plants)deserve further investigation.54
10 th <strong>Symposium</strong> on the Flora of Southeastern Serbia and Neighbouring regions,Vlasina 17 to 20 June 2010Reproductive allocation along the altitudinal gradient in adioecious plantCvetković, D., Nenadović, J., Vujić, V., Jovanović, V.Biološki fakultet, Univerzitet u Beogradu, Srbijadragana@bio.bg.ac.rsIn dioecious plant species, investment in reproduction differs beween thesexes; typical situation is that reproductive allocation (RA) is significantly greater infemales than in males, though in some studies different findings have been reported.Also, reproductive allocation can vary within species in response to environmentalstress or decrease in habitat quality. The aim of this study was to examine variationin RA in populations of dog’s mercury, Mercurialis perennis L. (Euphorbiaceae)between sexes and along the altitudinal gradient. Male and female plants weresampled during spring season from four populations on Mt. Kopaonik, representingaltitudinal range from 710m to 1730m asl. RA was calculated as relative biomassallocated to reproductive organs. The obtained RA values were significantly greaterin females than in males (average values: 0.057-0.109 vs. 0.026-0.031), confirmingthat females invested more in reproduction. In analysed populations, RA wa s onaverage 3 times greater in females than in males – this result is in accordance withprevious studies and falls within the range of between-sex differences in RA foundin dioecious plants. Altitudinal variation in RA showed prominent differencebetween sexes – RA decreased significantly with increasing altitude in females, butthis trend was not observed in males. We discuss the obtained results in the contextof putative underlying mechanisms.Activities on creating bibliographies of botanicalresearches in MontenegroBulić, Z.Institute for the Protection of Nature of Montenegro, Montenegrozlatkobulic@t-com.meIn Montenegro, for a long time, there have been realized activities oncollecting literature and other botanical material and, till now, three publication havebeen elaborated and the fourth one is in preparation for printing. These publicationsrefer to Bibliographies on flora and vegetation of Montenegro. The first andfundamental bibliography on flora and vegetation of Montenegro by dr VukićPulević appeared in 1980, published by Montenegrin Academy of Sciences and Artsand it includes 1055 bibliographical units. The second one by author Vukić Pulević,55
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