Transcript Lake Drukљiai/Drisviaty basin

Lake Drukšiai/Drisviaty basin
Institute of Ecology of Vilnius
University
Transboundary
lake. Largest lake
in Lithuania. Total
area 4900 ha. 4200
ha belongs to
Lithuania, 700 ha
to Belarus
Lake Drūkšiai is protective area
according EU Habitat directive
Appendix I
Code 3140 - lakes with chara algae communities
Dominant species in underwater flora - Chara
rudis, Chara filiformis, Chara aspera, Nitellopsis
obtusa
State of habitat – under threat
Lake Drūkšiai is protective area
according EU Habitat directive
Appendix II
• Numerous population of Otters (Lutra
lutra) In Lake Drūkšiai
• Numerous population of Spined loach
(Cobitis taenia) In Lake Drūkšiai
Population size up to 20 000 mature
individuals.
Lake Drūkšiai is protective area
according EU Birds directive
• Numerous population of great bittern (Botaurus
stellaris) In Lake Drūkšiai
Population size – 10 pairs
• Numerous population of great white heron
(Egreta alba) and common tern (Sterna hirundo)
In Lake Drūkšiai
Main populiation of common tern is in Belorus part
of lake
Population size of great white heron – 4 pairs,
common tern – 20 pairs
Other species from the EU Habitat
and Bird directives
Insects – 3 species: Leucorrhinia pectoralis,
Leucorrhinia albifrons, Lycaena dispar
Fish – Coregonus atbula
Amphibia - 2 species: Triturus cristatus and Bombina
bombina
Birds – 15 species: Gavia arctica, Haliaetus albicilla,
Circus aeruginosus, Circus pygargus, Grus grus,
Porzana porzana, Porzana parva, Crex crex,
Haematopus ostralegus, Larus minutus, Chlidonias
niger , Alcedo atthis, Luscinia svecica
Habitat management plan to
maintain most important habitats in
Lake Drūkšiai
• Two main goals:
• Maintain habitats suitable for great bittern
Botaurus stellaris
• Secure population of otter (Lutra lutra)
protecting important habitats and individuals.
• Additional goal: maintain and secure habitats
of all species included in EC Habitat and Bird
directives
Strong points of Lake Drūkšiai
habitat management plan
• First comprehensive complex study of
plants and animals.
• First comprehensive evaluation of state of
protective habitats
• Suggested measures to maintain or
improve existing situation
• Specified important habitat teritories
Weak points of Lake Drūkšiai
habitat management plan
• Short term study (except fish), long term
changes are not evaluated
• Study was done only in Lithuanian part of
Lake
• Study done only in lake territory, no
comprehensive data about Lake Drūkšiai
basin
Necessary studies
• Repeated comprehensive assessment of
plants and animals in Lake Drūkšiai to
evaluate long term changes
• Comprehensive study plants and animals of
Lake Drūkšiai Basin
• Comprehensive transboundary GIS system of
Lake Drusiai basin with particular emphasis on
biodiversity and nature protection areas as
well as environmental conflicts/risks zones.
Main potencial areas of interest
• From the botanical point of view the most
valuable are area valleys of the Drukša and
Smalva rivers, Smalvos bog complex with
several protected plant species and natural
habitats of EU importance as well as Lake
Apvardai with the vital population of
Aldrovanda versiculosa.
Main potencial areas of interest
• From the ornithological point of view, basing on
existing scare data from previous years or related
with inventory of few species only, the most valuable
are: Smalvos transitional bogs, euthrophic lakes of
the Smalva River valley, islands of Lake Drūkšiai and
its shore zone, wet meadows of the Drūkša River and
shore zone of Lake Apvardai including particular
natural fens in the close surroundings.
•
Implementation of EU Water
framework directive, monitoring of
• Existing comprehensive fish and other
hydrobionts population data.
• Monitoring of all fish species every year in
different seasons
• Two main areas of investigation – “cold
water” zone and “warm water” zone
• Main shifts in population parameters,
growths, species composition and
community structure since start of Ignalina
Nuclear Power plant
Joint methodology and monitoring
• For the fauna complex, first step should be
preparation of the joint methodology for
biodiversity surveys (including surveys in
selected standard plots) and detail monitoring
program of the most important populations of
the protected species.
Inventory of fauna
• Detail inventory of different fauna groups should be
organized on Lake Drūkšiai and its on shore areas,
valleys of the rivers Drūkša and Smalva including
surrounding wetlands, Smalvos bog complex and
Lake Apvardai with surrounding natural fens. Field
surveys should cover crustaceans, moluscs, fish,
waterbirds and birds of the bog complexes, and
semi-water mammals.
Comprehensive transboundary GIS
system of Lake Drūkšiai basin
• Preliminary specifications of the GIS system:
• A uniform and seamless map base - pan-sharpened
satellite imagery mosaic (Landsat ETM,14 m pixel
resolution, reference year 2000);
• A uniform and seamless Digital Terrain Model - SRTM
version 2 DTM (data type - integer, pixel resolution - 90
m);
• Delineation of the boundary of the Lake Druksiai
catchment area on the basis of SRTM Digital Terrain
Model and the available ancillary data;
• Standard European coordinate reference system
(ETRS89-LAEA);
• Base map and thematic vector layers - scale 1:50,000,
compliant to OGC standards;
Comprehensive transboundary GIS
system of Lake Drusiai basin
• Seamless trans-boundary generic land cover and land
cover changes databases of Lake Drūkšiai basin compliant with CORINE Land Cover standards, covering
at least the last two decades;
• Implementation of INSPIRE database model for
corresponding thematic
data types;
• Implementation of Web Map Services (WMS) and Web
Feature Services (WFS) for on-line delivery of the GIS
database.
• Modeling of the relationship between the land cover
changes and changes in the hydrology parameters of
Lake Drukšiai basin system.
Implementation of EU Water
framework directive?
Ecological assesment of
transboundary water bodies, water
management plans, etc.