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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ASSESSMENT OF THE DAILY METABOLISM, GHG RELEASE AND CABON SEQUESTRATION
Ivan Traykov, Department of Ecology and EP, Sofia University
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.
1. Monitoring of birds
3. Purchase of land in the Marsh (43 ha)
4. Visitors infrastructure:
5. Programme for wastewater treatment:
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.)
6. Protection and restoration of species:
7. Using biomass from the marsh as energy:
Ivan Traykov, AneliaKenarova
Department of Ecology and EP, Sofia Ubiversity
Department of Botany, Sofia University
(emergent and submergent vegetation)
(light and dark bottles, chlorophyll-a)
(diurnal oxygen changes)
(CH4 and CO2)
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
NPPmax = 2,85 gO2/m3/h at 0,3m depth between 2 and 4 pm
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.