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Severe Drought Monitoring by Remote Sensing Methods and Its Impact on Wetlands Birds Assemblages in Nuntași and Tuzla Lakes (Danube Delta Biosphere Reserve)

Author

Listed:
  • Vasile Jitariu

    (Faculty of Geography and Geology, Alexandru Ioan Cuza University, 700506 Iasi, Romania)

  • Alexandru Dorosencu

    (Danube Delta National Institute for Research and Development, 165 Babadag Street, 820112 Tulcea, Romania)

  • Pavel Ichim

    (Faculty of Geography and Geology, Alexandru Ioan Cuza University, 700506 Iasi, Romania)

  • Constantin Ion

    (Faculty of Biology, Alexandru Ioan Cuza University, 700506 Iasi, Romania)

Abstract

The present paper aims to highlight the impact of the partial or total drying of the Nuntași and Tuzla lakes (from the Danube Delta Biosphere Reserve) as a result of intense drought phenomena on groups of waterfowl that are encountered in this region. Our analysis combined satellite remote sensing techniques with bird observations that were made monthly during the analyzed period, corroborated with the meteorological context of the time interval that was taken into account. The results of the satellite image processing show a partial drying in 2013 and a total drying in 2020 of the Nuntași and Tuzla lakes, which were caused by both natural factors (drought) and anthropogenic factors (inadequate management of the area—e.g.,: communication channels with surrounding lakes are clogged). These situations have led to repercussions for groups of birds, which behave differently depending on their ecology. Pelicans and swans are the most affected birds, they leave the area in the absence of water, whereas gulls and terns are not affected by the decrease in the water surface, they even increase their numbers in such conditions. Our study also shows that from 2010 to 2020 the largest numbers of birds (total numbers of birds), with the exception of pelicans, were recorded in 2013 and 2020, more precisely in the years when the water surface decreased considerably. Another important feature of this paper involves highlighting how fragile an ecosystem can be in the context of climate change, but also how important it is to involve human society in maintaining the adequate conditions for an ecosystem that is part of one of the most important biodiversity hotspots on the planet, the Danube Delta Biosphere Reserve.

Suggested Citation

  • Vasile Jitariu & Alexandru Dorosencu & Pavel Ichim & Constantin Ion, 2022. "Severe Drought Monitoring by Remote Sensing Methods and Its Impact on Wetlands Birds Assemblages in Nuntași and Tuzla Lakes (Danube Delta Biosphere Reserve)," Land, MDPI, vol. 11(5), pages 1-18, April.
  • Handle: RePEc:gam:jlands:v:11:y:2022:i:5:p:672-:d:806679
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    References listed on IDEAS

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    1. Alexandru Dumitrescu & Marius-Victor Birsan, 2015. "ROCADA: a gridded daily climatic dataset over Romania (1961–2013) for nine meteorological variables," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 78(2), pages 1045-1063, September.
    2. Ionuţ Minea & Marina Iosub & Daniel Boicu, 2022. "Multi-scale approach for different type of drought in temperate climatic conditions," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 110(2), pages 1153-1177, January.
    3. Paul Omute & Rob Corner & Joseph Awange, 2012. "The use of NDVI and its Derivatives for Monitoring Lake Victoria’s Water Level and Drought Conditions," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(6), pages 1591-1613, April.
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    1. Xian Liu & Ying Qiu & Zuli Zheng & Qingwen Hong & Yanjiao Zhang & Qiao Qian & Baodan Wan & Qunli Chen, 2022. "Spatiotemporal Changes in Waterfowl Habitat Suitability in the Caohai Lake Wetland and Responses to Human Activities," Sustainability, MDPI, vol. 14(21), pages 1-18, November.

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