ABSTRACT1. The aim of this study was to describe a botanical classification for lakes in Serbia based on vegetation assemblage, basic water quality parameters and geographic region.2. Between 2008 and 2010 records from more than 1000 relevés were collated into one dataset. All relevés were derived from synoptic syntaxon tables .3. In order to fill geographical and methodological gaps in the database, additional field research was carried out during 2008, 2009 and 2010 at 18 new locations, producing a final total of 98 sites, 748 relevés and approximately 22,500 floristic records.4. Cluster analysis using TWINSPAN (Two-Way INdicator SPecies ANalysis) revealed two main lake vegetation types (LVT1 and LVT2). LVT1 is characterized by typically species-rich, eutrophic sites with Ceratophyllum demersum dominant, followed by Hydrocharis morsus-ranae, Lemna minor, Salvinia natans as constants, while LVT2 comprises species-poor, meso-eutrophic sites with Myriophyllum spicatum constant. These two main lake vegetation types are further divided into four sub-types (LVT1a, LVT1b, LVT2a, LVT2b), and seven site groups.5. Instead of predicting the vegetation lake groups using predefined physico-chemical categories, the reverse approach has been applied. Altitude and BOD/COD values (as proxies of trophic status) verified the TWINSPAN-derived classification based on lake vegetation.6. Brief reviews are given to describe national conservation strategy. The results from this study illustrate their value in amplifying descriptions of sites already recognized as important nationally and internationally. In addition, Groups 5 and 6 are considered a potential conservation resource, with six site-targets in particular, representing specific oases for many aquatic species whose natural habitats are endangered by human activity or natural succession.
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: (i) whether there are correlations
between the abundance of macrophyte groups and the physical environment
variables, and (ii) whether these relationships vary between macrophyte
groups with different morphology types. The Tamis 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.
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. [Acknowledgments. The hydromorphology dataset was prepared for the project ‘Biosensing Technologies and Global System for Long-Term Research and Integrated Management of Ecosystems’ (Biosensing tehnologije i globalni sistem za kontinuirana istraživanja i integrisano upravljanje ekosistema) III 043002 grant, while the biodiversity dataset was prepared the project Plant biodiversity of Serbia and the Balkans – assessment, sustainable use and protection (Biodiverzitet biljnog sveta Srbije i Balkanskog poluostrva – procena, održivo korišćenje i zaštita) 173030 Grant, supported by Ministry of Education and Science, Republic of Serbia
The aim of this study was to assess whether the Crno jezero (Black Lake)
could be designated as a site possessing specific reference conditions of a
glacial lake in the Dinaric Western Balkan ecoregion. The results of a Lake
Habitat Survey (LHS), analysis of macrophytes and a basic water quality
assessment indicate that the lake is in a near pristine state, particularly
with regard to its hydromorphological status, and that it fulfills the
requirements of High Ecological Status (HES), as set by the Water Framework
Directive. However, to confirm these preliminary findings, an integrated
assessment of the ecological and chemical status, using other biological
quality elements and a full set of physico-chemical parameters, is necessary.
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