Invasiva främmande arter orsakar förlust av biologisk mångfald i många livsmiljötyper. Alvar är en unik naturtyp med en specifik artsammansättning. En stor del av världens alvar finns på Öland, sydöstra Sverige, där naturtypen nu hotas av den invasiva främmande arten Cotoneaster divaricatus. Min studie undersöker om faktorer som jorddjup och vegetationstyp styr etableringen av C. divaricatus på Stora Vickleby alvar på södra Öland. Resultatet visar att etableringsgraden för C. divaricatus är högre i torr gräs-ört-vegetation och att den huvudsakligen växer tillsammans med Juniperus communis eller andra buskar. Detta indikerar att dessa buskar ger skydd åt bärätande fåglar som koncentrerar spridningen till dessa platser, att jorddjupet kring busken är tillräckligt för att etablering skall kunna ske samt att näringsinnehållet i marken kan vara högre just där J. communis växer. Växtmiljöer som alvartorräng och buskmark med en, förutspås vara särskilt hotade av spridningen av C. divaricatus på alvaret. / Invasive alien species causes loss of biodiversity in many habitat types. Alvar is a unique habitat type with a specific species composition. A large part of the world's alvar is found in Öland, Sweden, where plant diversity is threatened by the invasive alien species Cotoneaster divaricatus. My study investigates the effect of soil depth and vegetation type on the establishment of C. divaricatus on Great alvar of Vickleby in southern Öland. The results show that the rate of establishment of C. divaricatus is higher in dry grass-herb-vegetation and that it mainly grows in connection with Juniperus communis or other shrubs. This indicates that bushes gives shelter to seed dispering birds, that the soil depth is sufficient and that the amount of nutrients can be higher around J. communis. A future threat of C. divaricatus is predicted to areas with dry meadow and areas with shrubs of J. communis.

This thesis deals with the level of influence of used substrates, during propagation of shrubs by herbaceous cuttings, to quality of their rooting. Also was tested the impact of these substrates for subsequent growth after planting into loose soil. Thesis includes literary section which summarizes information about plant propagation including factors that affect it and informations about substrates. Part of this work is an experiment that is thoroughly described there, including the methodology and results. The first part of the experiment was conducted in two terms and each term contained four variants. Each variant is one of the tested substrates. In these substrates were grown two taxa: Cotoneaster dammeri Schneid. and Cotoneaster salicifolius Franch. Parkteppich. Total it was evaluated nearly 3,500 cuttings. Furthermore it was 400 plants were planted in loose soil and after overwintering were also evaluated their quality parameters. The result of the experiment is that the quality of the substrate has a really affect to the quality of the rooting of cuttings. A major impact on their subsequent growth has not been confirmed.

In 2013 and 2014 the occurrence of originator of Monilia Heat Stroke and Monilia Rot Fungi of the genus Monilia was observed in the Botanical Gardens and Arboretum, Mendel University and at other locations, e.g. Hranice na Moravě, Lednice, Namest nad Oslavou The following ones have been included in the observations: genera Cotoneaster, Malus, Prunus Persica, Pyrus, Sorbus, Cydonia, Crataegus, Chaenomeles and Mespilus. Based on morphological data, determination of Monilia species have been performed. Most commonly encountered species in the area BZA were Monilia laxa and M. fructigena. According to themorphological observation, it was determined thath kind M. polystroma appeared to be the most abundant species to the genus. The occurrence of lesser known species M. linhartiana on fruits Cydonia oblonga and Sorbus mougeotii has been confirmed.