Hydrological connectivity, structural and ecological functionality of a meandering ecosystem of the Danube Delta

• Autorzy: Dutu Laura , Dutu Florin , Pavel Ana-Bianca , Catianis Irina , Vasiliu Dan , Lupascu Naliana , Stanescu Ion

Identyfikatory

DOI

10.29227/IM-2024-01-36

Warianty tytułu

PL

Łączność hydrologiczna, strukturalna i ekologiczna funkcjonalność meandrującego ekosystemu delty Dunaju

• Języki publikacji: EN

Abstrakty

EN

The pressure control of the climate change and anthropogenic factors have consequences on the ecological systems, generating structural changes. The abiotic (i.e., water hydrology and hydraulics, sediment load, water physic-chemistry) and biotic (i.e., biodiversity, structure and functionality of food webs) characteristics of river-channels-lakes from deltas depend on several factors; however, the main driver of these characteristics is represented by the hydrologic connectivity with the main stem of the river. Floodplain lakes can be permanently, temporarily or disconnected with the main stem of the river producing interruptions in the transfer of fresh water and thus affecting benthic macroinvertebrates, by decrease in their population, diversity and even loss of sensitive taxa. Multidisciplinary investigations (hydrodynamics, sedimentological and ecological measurements and analyses) were made to investigate a river-channel-lake site type situated on the St. George branch formed by a cutoff meander (Mahmudia meander), a connective channel (Uzlina Canal) and a lake (Uzlina Lake) to observe how much the fresh water and sediment input to the delta depressions is affected by the structural changes of the meander physiography. The Mahmudia meander was rectified 40 years ago and the response of the channel consisted in a very fast silting of the former meander, currently receiving less than 5% of the upstream water and sediment discharge. The lateral connectivity with the deltaic depressions thought the lateral canals is compromised.

Słowa kluczowe

EN

hydrological connectivity; structural and ecological functionality; meander; ecosystem; Danube delta

PL

łączność hydrologiczna; funkcjonalność strukturalna i ekologiczna; meander; ekosystem; Delta Dunaju

• Wydawca: Polskie Towarzystwo Przeróbki Kopalin
• Czasopismo: Inżynieria Mineralna
• Rocznik: 2024
• Tom: Vol. 1, no. 1
• Strony: 323--328
• Opis fizyczny: Bibliogr. 10 poz., rys., tab., wykr.

Twórcy

autor

Dutu Laura

• National Research-Development Institute for Marine Geology and Geoecology – GeoEcoMar, Romania

autor

Dutu Florin

• National Research-Development Institute for Marine Geology and Geoecology – GeoEcoMar, Romania

• https://orcid.org/0000-0002-5393-3125

autor

Pavel Ana-Bianca

• National Research-Development Institute for Marine Geology and Geoecology – GeoEcoMar, Romania

autor

Catianis Irina

• National Research-Development Institute for Marine Geology and Geoecology – GeoEcoMar, Romania

• https://orcid.org/0000-0001-8120-7369

autor

Vasiliu Dan

• National Research-Development Institute for Marine Geology and Geoecology – GeoEcoMar, Romania

autor

Lupascu Naliana

• National Research-Development Institute for Marine Geology and Geoecology – GeoEcoMar, Romania

• https://orcid.org/0000-0002-0731-5676

autor

Stanescu Ion

• National Research-Development Institute for Marine Geology and Geoecology – GeoEcoMar, Romania

Bibliografia

• 1. L. Tiron Duţu, F. Duţu, D. Secrieru and G. Opreanu, “Sediments grain size and geo-chemical interpretation of three successive cutoff meanders of the Danube Delta, Romania”, Geochemistry 79, pp. 399-407 (2019).
• 2. N. Panin, “The Danube Delta. Geomorphology and Holocene evolution: a Synthesis”, Geomorphologie: relief, processus, environnement 4, pp. 247–262 (2003).
• 3. N. Panin and D. Jipa, “Danube River Sediment Input and its Interaction with the North-western Black Sea”, Estuarine, Coastal and Shelf Science 54, 2, pp. 551-562, (2002).
• 4. B.V. Driga, “Delta Dunării - Sistemul circulaţiei apei”. Casa Cărţii de Stiinţă Cluj-Napoca. p. 256 (2004).
• 5. A. Popa, “Environment changes in the Danube Delta caused by the hydrotechnical works on the St. George branch”, Geo-Eco-Marina 2, pp. 135–147, (1997).
• 6. L. Tiron Duţu, M. Provansal, J. Le Coz, F. Duţu, “Contrasted sediment processes and morphological adjustments in three successive cutoff meanders of the Danube Delta”, Geomorphology 204, pp. 154-164 (2014).
• 7. L. Jugaru Tiron, J. Le Coz, M. Provansal, N. Panin, G. Raccasi, G. Dramais, and P. Dussouillez, “Flow and sediment processes in a cutoff meander of the Danube Delta during episodic flooding”, Geomorphology 106 (3-4), pp. 186–197, (2009).
• 8. C. Pringle, „What is hydrologic connectivity and why is it ecologically important?”, Hydrological processes 17, pp. 2685-2689, (2003).
• 9. Y. Zhang, C. Huang, W. Zhang, J. Chen, and L. Wang, „The concept, approach, and future research of hydrological connectivity and its assessment at multiscales”, Environmental Science and Pollution Research 28, pp. 52724–52743, (2021).
• 10. D. Secrieru and A. Secrieru, “Anthropic increases of trace element concentrations in sediments from the Black Sea Romanian shelf - Danube Delta-Black Sea System under Global Changes Impact”, GeoEco-Marina 1, pp. 93-98, (1996).

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki i promocja sportu (2025).