The recorded seed predators of Amorpha fruticosa L., indigo bush weevils and pteromalid wasps, were the subject of laboratory and field research studies in the period from 2006 to 2011. Sample analyses were carried out on more than 30 localities in Serbia with the aim of measuring the summarized pre-dispersal and post dispersal predation preferences. The percentages of the total pre-dispersal (max≈33%) and post-dispersal re-infested material (over 95%), make these insects serious candidates for host-plant suppression. Their bionomics were monitored through continuous collection, dessection and observation of infested seeds, in correlation with environmental parameters, especially water-level fluctuations in endangered forests. [Projekat Ministarstva nauke Republike Srbije, br. TP-31070: The development of technological methods in forestry in order to attain optimal forest cover
The vitality of a forest ecosystem to a great extent depends on the effect of different factors of stress, be it of biotic (harmful insects, phytopathogenic fungi, etc.), abiotic (frost, drought, high temperatures, etc.) or of anthropogenic origin (human activities). Some factors owning to their long-lasting effect can lead to the weakening of the individual trees or the whole forest ecosystem and eventually cause the mortality of it. The paper presents the results of the research of the types of damages of biotic, abiotic and anthropogenic origin at the sample plot of LEVEL 1 in the Republic of Serbia, conducted during 2013. By the analysis of the data, the results concerning the total number of trees with the identified types of damage, the part of the tree on which the some type of damage occurred most commonly, total number of the trees without any damage, most frequent type of damage and the types of trees with the highest and lowest percentage of damage, were obtained. The results which were obtained present the factual situation regarding the types of the damages for each sample plot and can be beneficial for the further analysis. By comparing these data with the date from other countries, the conclusions about the way in which the vitality of trees depend on the environmental conditions were made.
Level II intensive monitoring of forest vitality represents a multipurpose research system. Forest ecosystems are highly complex entities characterized by numerous different parameters subject to continuous variation due to constant and mutually inseparable effects of both biotic and abiotic factors. Evaluation criteria applied in intensive monitoring are compatible and defined in such a manner that, subsequent to their recording and statistical processing, data obtained on the condition of forests are easy to compare both analytically and logically, thus providing the basis for a variety of comparative studies. Dedicated test plot for intensive monitoring of trans-boundary air pollution impact on forest ecosystems in Serbia, a Level II test plot, was established in Kopaonik in 2010, with ten panels - from 10 separate forestry research areas, grouped according to the research subjects, which methodology is prescribed by ICP Forests Manual. This paper presents the results of intensive monitoring of parameters under review at Level II test plot Kopaonik in 2012.
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