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DRAGOMAN MARSH BULGARIA ASSESSMENT OF THE DAILY METABOLISM, GHG RELEASE AND CABON SEQUESTRATION Andrey Ralev , BALKANI Wildlife Society Ivan Traykov , Department of Ecology and EP, Sofia University Balkani Wildlife Society Created 1989, registered 1992. 70 members and 10 employees.

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dragoman marsh bulgaria

DRAGOMAN MARSHBULGARIA

ASSESSMENT OF THE DAILY METABOLISM, GHG RELEASE AND CABON SEQUESTRATION

slide2
AndreyRalev, BALKANI Wildlife Society

Ivan Traykov, Department of Ecology and EP, Sofia University

balkani wildlife society
Balkani Wildlife Society

Created 1989, registered 1992.

70 members and 10 employees.

1. Research, conservation and restoration of biodiversity.

2. Development of nature protection legislation.

3. Rising public awareness.

www.balkani.org

dragoman marsh
Dragoman Marsh
  • 331 ha, 705 m.a.s.l., 40 km from Sofia
  • The biggest karst marsh
  • Drained 1930s-1950s
  • Restoration since end of the 1990s
dragoman marsh now
Dragoman Marsh - now
  • 226 species of birds, 126 breeding
  • 30-40 pairs Ferruginous Duck (Aythianyroca)
  • 2006: Great White Egret, Purple Heron, Gray Heron, Great Bittern, Little Bittern
chepan hill 1206 m
Chepan Hill (1206 m)
  • Unique steppic submediteranean flora
  • Endemic plants: E. serbicus, A. wilmottianus,T. urumoffii
wet meadows
Wet meadows
  • Specific boreal flora: Salix rosmarinifolia, Plantago maxima, Viola pumila, Fritilaria meleagroides
  • 30-50 pairs of Corncrake (Crex crex)
work in the region
Work in the region

1. Monitoring of birds

(since 1994)

2. Environmental

education

work in the region9
Work in the region

3. Purchase of land in the Marsh (43 ha)

work in the region10
Work in the region

4. Visitors infrastructure:

slide11

Wetland

Conservation

Centre

work in the region12
Work in the region

5. Programme for wastewater treatment:

slide13

Constructed Wetlands Pond System

Creates work for local people (building and keeping)

Needs less energy and expertise for keeping

Needs more space (~10 sqm/inh. = 3-4 ha total for 3500 inh.)

work in the region14
Work in the region

6. Protection and restoration of species:

work in the region15
Work in the region

7. Using biomass from the marsh as energy:

carbon sequestration
Carbon sequestration

Ivan Traykov, AneliaKenarova

Department of Ecology and EP, Sofia Ubiversity

Anita Tosheva

Department of Botany, Sofia University

production of the marsh
Production of the marsh
  • Vegetation type/ habitat maps
  • Above ground biomass assessment

(emergent and submergent vegetation)

  • Phytoplankton production

(light and dark bottles, chlorophyll-a)

  • Community metabolism

(diurnal oxygen changes)

  • GHG ebullition rates

(CH4 and CO2)

phytoplankton production
Phytoplankton production
  • GPP = 3,45 gC/m2/d
  • CR = 3,46 gC/m2/d
  • P/R = 0,99
phytoplankton production21
Phytoplankton production

The measured NPP in the draining canals corresponds to Chl-a content in the phytoplankton of 39.8 ± 11.7 mg/m3, while in the inner open water pools the Chl-a is 5.33 ± 1.4 mg/m3 .

Vassilev and Tsavkova (2004) have shown strict relationship between the two studied parameters in Srebarna marsh. If we accept it to be true for Dragoman marsh as well, than the NPP of phytoplankton in the inner basins would be 0.08 gO2/m3/h, which is just 5.8% of the СМ (1.38 ±0.33 gO2/m3/h) in this type of habitats.

The area of the open water habitat in the marsh is117 ha, from which the draining canals take just 1%.

The NPP of the inner pools is assessed to be 44.2 tC/yand that of the drainage canals - 5.5 tC/y

community metabolism24
Community metabolism

NPPmax = 2,85 gO2/m3/h at 0,3m depth between 2 and 4 pm

ghg ebullition rates
GHG ebullition rates

CH4 ebullition ca. 95 295 kg/y', i.e., 287 kg/ha/y.

Annual CH4 emition up to ca. 633 kg/ha/y. comparable to the 701 kg/ha/y found by Kankaala et al., (2004) for total annual emission of methane from the littoral zone of shallow lakes.

CO2 ebullition is ca. 5 070 kg/y', i.e., 15.3 kg/ha/y.

future actions28
Future actions:
  • More detailed study of CO2 sequestration
  • Dragoman Marsh management plan – habitat for endangered species
  • Waste water treatment plant of Dragoman town – constructed wetland
  • Using biomass from the marsh as energy source
  • Preventing the common practice of burning the organic remains on agricultural lands