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1

Bitterling Populations in The Sighisoara-Târnava Mare Natura 2000 Site ‒ A Support System for Management Decisions

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Curtean-Bănăduc A., Cismaș I.-C., Bănăduc D.
Management of Sustainable Development
|
2016
|
vol. 8
|
issue 1
5-13
EN
The predominant threats to the Bitterling populations in the Sighisoara-Târnava Mare Natura 2000 site are the hydro technical modifications of the river channels, organic contamination and illegal fishing. ADONIS:CE is applied commonly for business processes modelling, however, in this study case was applied in an ecology/biology sphere of interest. The authors acquired a Bitterling model which contained all of the identified habitat species’ necessities, the specific indicators that give good preservation status and the present pressures and threats. The keeping of the riverbed morphodynamics is especially necessary - the meanders existence is significant for the aquatic mollusc species which are existing in the inner U shape sectors of the lotic systems. The sectors, where the sand and mud are relatively fixed, give appropriate habitats for molluscs which is valuable for the reproduction of Bitterling. The preserving of the present water oxygenation and regime of liquid flows, and the prevention of the sediments deposition rate in the aquatic habitats are needed too for the molluscs’ existence. The sediments exploitation in these lotic systems should be realised in relation with the natural rate of renewal and at sites at a distance over five km between them.
2

ECOLOGICAL ASSESSMENT AS A FIRST STEP IN THE EVALUATION OF ECOSYSTEM SERVICES PROVIDED BY LOTIC ECOSYSTEMS

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Farcaş A. N., Curtean-Bănăduc A., Kifor C. V.
Management of Sustainable Development
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2013
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vol. 5
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issue 2
9-12
EN
The ecosystems offer to the socio-economic system a series of goods and services derived from their processes and biodiversity. Ecosystem services offered by a river are at their highest potential when the river status is close to the natural one. Once the river is affected by human impact due to resources exploitation, hydro technical works, water abstraction or improper land use, the ecological status declines and the ecosystem services become scarce. This is why an ecological assessment is necessary in order to establish the connection between the ecosystem services and the human impact. In this paper, the ecological assessment of Timiș River was done, allowing the classification of the river in four sectors with different ecological statuses, associated with the various human impacts that differently affect the quality of the water, the riverbed and the flooding area.
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