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stations S5-Nik€ e and S6-G€ erlic€ e indicate the bad water quality and poor ecological status. The largest number of macrophyte species that were not heliophytes was recorded in SP8-Hani i Elezit. We can conclude that the presence of macrophyte species in river varies from nutrient levels in water. Our results show that values of macrophyte based indices reflect the water quality in sampling stations therefore we can consider them as a reliable instrument for the assessment of the ecological status of the rivers.

Serpentine vegetation of Kosovo represents a diversity which has not been sufficiently explored, yet. Kosovo's serpentine is spread in different parts of Kosovo at the altitudes of 400-2100 m. Large complexes with serpentine are found in the north of Kosovo, but the southern part of Kosovo is also rich in serpentine rocks and in endemic species.Using the principles and methods of the Zürich-Montpellier School we have explored the serpentine flora and vegetation of Gurana, an area in the south-east of Kosovo near the border with the Republic of Macedonia. This area has not been sufficiently researched because of the militarized border areas. During the research of these fields, we found species that were not present on the other serpentines of Kosovo.The species Convolvulus compactus Boiss. (syn. Convolvulus cochlearis) and Stipa mayeri dominate this terrain and create stands that we have classified as the association Stipeto-Convolvuletum compacti ass. nova. This association was researched during 2007-2010. Based on the results obtained and comparing them with the results of other authors, we have arrived at the conclusion that we are dealing with a new association which we called Stipeto-Convolvuletum compacti ass. nova.

Sixteen endemic plant taxa were selected from Kosovo, according to the IUCN standards and for each taxon the risk assessment and threat category has been assigned. The taxa were compared with their previous status from fifteen years ago. From sixteen plant taxa, which were included in this work, four are Balkan endemics, whereas, eight of them are local endemics and four of the taxa are stenoendemics. Six of the taxa are grown exclusively on serpentine soils, five of them on limestone substrate, four of them in carbonate substrate, yet only one in silicate substrate. The work has been done based on the standard working methodologies of the IUCN (Guidelines for Using the IUCN Red List Categories and Criteria -Version 8.1). The most threatened plant taxa is Solenanthus krasniqii -which after its observance has only 20 mature individuals. As a result of the wild collection of the medicinal and aromatic plants, from the local population, Sideritis scardica is about to be completely go extinct. The aim of this study was to assess the state of endemics in the threats possessed to them during the previous times, present and predicting the trends for the upcoming years. IzvlečekNa podlagi IUCN standardov smo na Kosovu izbrali šestnajst endemičnih taksonov (vrst in podvrst) in za vsakega naredili oceno tveganja in mu opredelili kategorije ogrožanja. Za posamezno vrsto smo naredili primerjavo s stanjem pred petnajstimi leti. Med izbranimi vrstami so štiri balkanski endemiti, osem je lokalnih endemitov in štirje so endemiti. Šest vrst uspeva izključno na tleh na serpentinu, pet na apnencu, štiri na karbonatni in samo ena na silikatni podlagi. Oceno smo naredili v skladu s standardno metodologijo IUCN (Guidelines for Using the IUCN Red List Categories and Criteria -Version 8.1). Najbolj ogrožena vrsta je Solenanthus krasniqii, kjer smo opazili samo še 20 odraslih osebkov. Vrsta Sideritis scardica pa je pred popolnim izumrtjem zaradi nekontroliranega nabiranja zdravilnih in aromatičnih rastlin. Namen raziskave je bil oceniti stanje endemičnih vrst, grožnje v preteklem in sedanjem času in napoved trendov ogroženosti v prihodnosti.

During the study on the assessment of ecological status of the Lepenci river basin, epilithic diatoms were used. Via this methodology, the authors aimed to standardization the ecological assessment methodology and gradually make it applicable for all river basins of Kosovo. The authors relied on a hypothesis that the epilithic diatom communities can serve as a reliable ecological tool to evaluate the quality of flowing waters in Kosovo. Thirteen water quality indices (IBD, IPS, IDG, DESCY, SLA, IDSE, IDAP, EPID, CEE, WAT, TDI, IDP and SHE) were measured in eight sample-points. From the conducted qualitative analysis, the obtained results showed that the water quality varies from upper parts of the basin (SP1, SP2, SP3 & SP4) characterized with higher water quality towards the lower parts (SP5, SP6 & SP7) where water quality was of the 2nd class and finally in Hani i Elezit (SP8) where the index values showed that its water belongs to the 3rd class. The samples were taken in to 8 sampling sites, in river during year (2017), the Navicula viridula species was the most dominant, along with Cocconeis placentula var. lineate and Diatoma vulgaris. In turn, between August and end of September, the following species were dominant ones: Craticula ambigua, Navicula hintzii, Navicula viridula and Rhoicosphenia abbreviata.