Floristic diversity in the Pannonian Plain is the result of mosaic habitat composition, characterized by steppes, saline meadows, and lowland forests along major rivers. In the last few centuries, ...the flora has become enriched by species introduced by human activities, such as colonization and industrialization. Presently it consists of nearly 1800 species. As a result of 30 years of field research as well as herbarium and literature searches, a list of invasive alien neophytes has been compiled and is presented here. The list includes 152 species, classified as either naturalized, casual, or unknown. One of the species is listed in Red Book of Serbian Flora. Eighty species are naturalized, and 61 are casual species. The majority of the introduced flora originates from North America (66) and the Old World (43). Most alien invasive species of the Southeastern part of the Pannonian Plain, were introduced accidentally by seed material or deliberately by nursery saplings. The annual and perennial herbaceous plants, which flower in the summer and summer-autumn periods, are represented in the greatest numbers. The alien flora was further analyzed with respect to taxonomy, life forms, pollination, and seed dispersal mode. The greatest number of alien species appears in anthropogenic and semi-natural habitats (59). In natural habitats, 45 invasive taxa were recorded, representing a conservation threat to biodiversity.
Methods for assessing the hydrology and morphology of lakes (‘hydromorphology’) are needed for reporting under national and international legislation, as well as to assist in lake management and ...restoration. Despite this, no consistent approaches have been developed around Europe for monitoring lake hydromorphology.
To address this need, representatives from 12 countries met at a series of workshops to develop two protocols for monitoring, published under the auspices of the European Committee for Standardization (CEN). The first standard (EN 16039) describes six categories for assessing lake hydromorphology: hydraulics, morphometry, bedforms/landforms and substrate, connectivity and continuity, and land cover. The second standard (EN 16870) sets out a scoring system for assessing the degree of modification of lake hydromorphology, which was designed, tested and refined using data from 127 lakes in seven European countries.
The CEN standards focus on four lake zones—riparian, shore, littoral, and open water—but recognize the importance of considering lakes within their wider catchment context. The field techniques described are based largely on Lake Habitat Survey but also rely on existing databases, maps and remote‐sensing data.
These standards are aimed at scientists, conservation bodies and environmental regulators, and are relevant not only for monitoring lakes under the Water Framework Directive, but also for contributing to programmes of lake conservation. For example, in the UK, parts of the CEN standards have been incorporated within the methods used for monitoring and reporting on the condition of Special Areas of Conservation (under the Habitats Directive) and Sites of Special Scientific Interest under national legislation.
It is hoped that this pan‐European approach will improve the ability to compare data across many countries, and ultimately ensure that the results of monitoring are translated into measures for improving the hydromorphological condition of lakes and the biological communities they contain.
► The nutrient indices (MSI) for 46 lake hydrophytes in Serbia were calculated. ► A Macrophyte Nutrient Index (LIMNIS) was developed for Serbian lakes. ► The LIMNIS strongly correlated with the ...existing Lake Typology.
The aim of this study was to derive a Macrophyte Nutrient Index for standing waters in Serbia, based on the LEAFPACS method and to correlate it against existing Lake Typology.
A single data matrix of 46 species and 1463 sample quadrats was compiled from two datasets: a revised phytocenological database given according to Braun-Blanquet Cover Abundance Scale and a database of sample quadrats collected during the summer months of 2009, 2010 and 2011 at 31 lakes in Serbia. The nutrient indices (MSI) for 46 lake hydrophytes were calculated using the Reprediction Algorithm on N-Ellenberg's values. A Macrophyte Nutrient Index (LIMNIS) was calculated as the weighted average of MSI values for Serbian lakes. Correlation between rescaled MSI and original N-values was strong (0.82), and the same applies to the root-mean-square error value (0.75). Moderate LIMNIS values were derived for meso-oligotrophic lakes, as well as for eutrophic swamps and fens of the Danube floodplain. In the same manner, lakes classified as eutrophic showed the relatively higher LIMNIS values, and those recognised as potential conservation resources were characterised by moderate or low LIMNIS scores.
Median LIMNIS values of six Lake Groups differed by less than one unit, which confirmed the similarity of the previously given Lake Types.
Agrotechnical measures are the main factor defining the vineyard weed flora
structure and composition, while adequate weed control measures
simultaneously ensure that vineyards are being ...well-managed, thus securing
good grapevine health and high quality of wine. Given that the biological
spectrum of weeds affects the choice of weed control measures, the aim of
this study was to determine the biological properties of the weed flora in
Vrsac vineyards, by assessing dominant life forms and phenology of the
identified weeds. The floristic analysis was conducted during the 2016
vegetation season (March-November) at 60 plots (1 m2), at three field sites.
The presence of 97 plant taxa, belonging to 26 families, was determined. The
biological spectrum of the vineyards weed flora has shown a
thero?phyto-hemicryptophyte character (therophytes: 57.73% and
hemicryptophytes: 34.02%). The scapose herbaceous plants with
summer-flowering phenology were dominant within the therophytes and
hemicryptophytes. The obtained results have shown a higher weed diversity in
vineyards, when compared to previous research of the weed flora in the study
area, but similar to more recent studies conducted in the neighbouring
countries. Furthermore, the dominant presence of therophytes in the vineyard
weed flora was expected, bearing in mind the primarily mechanical weed
control measures traditionally applied in vineyards.
Despite the absence of a centralized national phytocoenological database of
Serbia, over 16,000 relev?s of all vegetation types have been gathered and
stored in the database ?Phytocoenosis of Serbia? ...as a result of the Project
?Habitats of Serbia?. However, as the data on aquatic and semiaquatic
vegetation comprise only 5% of the collected relev?s, the aim of this paper
is to expand on this, complete the database and present the data on these
vegetation types in Serbia. The work included the expansion of the existing
database with the addition of relevant sources, their digitalization, using
Flora and Turboveg programs, and their subsequent georeferencing, using
OziExplorer and DIVAGIS softwares. Consequently, the phytocoenological
database on aquatic and semiaquatic vegetation in Serbia now stores 1,720
relev?s from 243 phytocoenological tables, collected and published by 24
authors during the period of 70 years (1940-2010), with the majority of the
relev?s collected over the last decade (56.40%). Phragmito-Magno-Caricetea
Klika in Klika et Nov?k 1941 (Syn: Phragmitetea communis R. Tx. et Prsg.
1942), Potametea Klika in Klika et Nov?k 1941 (Syn: Potametea R. Tx. et
Preising 1942) and Lemnetea de Bol?s et Masclans 1955 (Syn: Lemnetea minoris
W. Koch et R. Tx. 1955) have proven to be the most represented classes, while
Scirpo-Phragmitetum W. Koch 1926 (nomen ambiguum) and Salvinio
natantis-Spirodeletum polyrrhizae Slavnic 1956 are associations with the
highest number of relev?s in the database. Accordingly, the most common
species (>500 relev?s) are Ceratophyllum demersum L. subsp. demersum, Lemna
minor L. and Spirodela polyrhiza (L.) Schleiden.
nema
Diversity of vascular hydrophytes in the Zasavica river (Serbia): Changes after thirteen years Vukov, D., Faculty of Sciences, Novi Sad (Serbia). Department of Biology and Ecology; Igić, R., Faculty of Sciences, Novi Sad (Serbia). Department of Biology and Ecology; Rućando, M., Faculty of Sciences, Novi Sad (Serbia). Department of Biology and Ecology ...
Archives of biological sciences,
(2012), Volume:
64, Issue:
4
Journal Article
Open access
Zasavica is a 33.1 km-long, slow-flowing river on the southern edge of the Pannonian plain. It has been a protected natural asset since 1997, and has great value as a natural aquatic habitat. In the ...period between 1998 and 2010, intensive studies of the aquatic vegetation were carried out. The comparisons of results gained at the beginning of that period with those from the end, show significant differences in species composition, spatial distribution, and diversity analyzed through species richness, Shannon’s diversity index, and evenness.
This paper describes the first steps in gathering biological data to assess the conservation value of rivers in Serbia, using SERCON (System for Evaluating Rivers for Conservation). SERCON was ...developed in the UK to improve consistency in assessments of river ‘quality’ by using a scoring system to evaluate habitat features and species groups, catchment characteristics, and the potential impacts to which river systems may be subjected. This paper provides checklists for aquatic, semiaquatic and marginal plants, macroinvertebrates, fish and birds associated with rivers in Serbia, collated from a wide range of published and unpublished sources. These lists should be regarded as provisional because few wide-ranging biological surveys have been carried out specifically on Serbian rivers; further revisions are likely as more information becomes available in future. Ultimately, the work will benefit regulators and decision-makers with responsibility for river management under the new Water Law, and contribute to river protection and conservation in Serbia.
A riverside tale: Assessment of altered habitat effects on macrophyte assemblage on the river Tamiš, Serbia Radulović, S., Faculty of Sciences, Novi Sad (Serbia). Department of Biology and Ecology; Laketić, D., Faculty of Biology, Belgrade (Serbia). Institute of Botany and Botanical Garden Jevremovac; Vukov, D., Faculty of Sciences, Novi Sad (Serbia). Department of Biology and Ecology
Archives of biological sciences,
(2010), Volume:
62, Issue:
4
Journal Article
Open access
The aim of this study was to recognize the relationships between the physical characteristics of river reaches and the supported macrophyte assemblage, using the newly developed RHS (River Habitat ...Survey) method and dataset, and to test the following specific hypotheses: 1) whether there are correlations between the abundance of macrophyte groups and the physical environment variables, and 2) whether these relationships vary between macrophyte groups with different morphology types. The Tamiš river possesses a highly diverse habitat potential, while high values of HMS capture obviously to significantly modified habitat classes, significantly distinguishing the R1 and L1 spot-check as a hot spot along the area studied.
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