Habitat preferences and trophic interactions of the benthic invertebrate communities inhabiting depositional and erosional banks of a meander from Danube Delta (Romania)

Pacioglu, Octavian; Duţu, Laura Tiron; Duţu, Florin; Pavel, Ana Bianca

doi:10.1016/j.gecco.2022.e02213

Cited by 2 publications

(2 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The spatial and temporal distribution of C. fluminea populations may depend on a variety of factors, including the season and method of sampling, as well as abiotic factors such as substrate type [44]. C. fluminea prefers sandy silt and sandy clay sediments [44,102,160,161]. At Danube sites in Bulgaria, the highest species density was found in areas with a substrate made of coarse sand and sand with gravel.…”

Section: Historical and Modern Distribution Range Shiftsmentioning

confidence: 99%

The Spatio-Temporal Distribution of the Freshwater Bivalves Corbicula fluminea and Dreissena polymorpha in the Lower Sector of the Danube River and the Danube Delta

et al. 2023

View full text Add to dashboard Cite

The objective of this study is to provide an updated account of the distribution history of two invasive molluscs, Corbicula fluminea and Dreissena polymorpha, both in Europe and worldwide. In addition to this, the study also intends to review their ecological requirements to gain a better understanding of their invasive potential and distribution dynamics. Specifically, the study focuses on updating the distribution and ecological characteristics of these freshwater bivalves in the lower sector of the Danube River and the lakes of the Danube Delta. The purpose is to better understand their invasive and distribution dynamics and to develop effective measures to limit their spread in the future. To achieve this, environmental proxies such as sediment particle size and Total Organic Carbon (TOC) concentrations were used to assess their tolerances. However, the results did not show a significant correlation between the densities of these bivalves and the analyzed environmental parameters. Despite this, the species were found in high densities and formed well-developed benthic communities in some stations. The study contributes to the understanding of the invasiveness of these bivalve species and their distribution range dynamics. Nonetheless, further investigation is required to fully comprehend the role of environmental parameters in their distribution. The study covers the period between 2010 and 2020 and focuses on the lower Danube River sector and Danube Delta.

show abstract

Section: Historical and Modern Distribution Range Shiftsmentioning

confidence: 99%

The Spatio-Temporal Distribution of the Freshwater Bivalves Corbicula fluminea and Dreissena polymorpha in the Lower Sector of the Danube River and the Danube Delta

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The Danube Delta is well-known for its biodiversity, comprising a large number of plant and animal species that unfortunately were negatively affected by the anthropogenic interventions over the past century (Zinevici & Parpală 2006, Gâştescu 2009. The humaninduced disturbances, such as eutrophication, changes in water and sediment fluxes as a result of cut-off channels or frequent dredging activities for improving navigation, the fast development rate of local tourism, but without proper sanitation conditions, have affected the complex of ecosystems and implicitly the water quality in the Danube Delta (Jugaru-Tiron et al 2009, Pacioglu et al 2022. The effects of forestry management actions undertaken in the Danube Delta after 1960, which included the planting of willow species and Canada poplar could also have influenced the water physico-chemistry, although this aspect was understudied (Călugăr et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

How accurate is the remote sensing based estimate of water physico-chemical parameters in the Danube Delta (Romania)?

Necula¹,

Tușa²,

Sidoroff³

et al. 2022

AFR

View full text Add to dashboard Cite

The current paper estimated the physico-chemical properties of water in the Danube Delta (Romania), based on Sentinel 2 remote sensing data. Eleven sites from the Danube Delta were sampled in spring and autumn for three years (2018-2020) and 21 water physico-chemical parameters were measured in laboratory. Several families of machine learning algorithms, translated into hundreds of models with different parameterizations for each machine learning algorithm, based on remote sensing data input from Sentinel 2 spectral bands, were employed to find the best models that predicted the values measured in laboratory. This was a novel approach, reflected in the types of selected models that minimised the values of performance metrics for the tested parameters. For alkalinity, calcium, chloride, carbon dioxide, hardness, potassium, sodium, ammonium, dissolved oxygen, sulphates, and suspended matter the results were promising, with an overall percentage bias of the estimates of +/- 10% from the observed values. For copper, magnesium, nitrites, nitrates, turbidity and zinc the estimates were fairly accurate, with percentage biases in the interval +/- 10% - 20%, whereas for detergents, led, and phosphates the percentage bias was higher than 20%. Overall, the results of the current study showed fairly good estimates between remote sensing based estimates and laboratory measured values for most water physico-chemical parameters.

show abstract

Habitat preferences and trophic interactions of the benthic invertebrate communities inhabiting depositional and erosional banks of a meander from Danube Delta (Romania)

Cited by 2 publications

References 81 publications

The Spatio-Temporal Distribution of the Freshwater Bivalves Corbicula fluminea and Dreissena polymorpha in the Lower Sector of the Danube River and the Danube Delta

The Spatio-Temporal Distribution of the Freshwater Bivalves Corbicula fluminea and Dreissena polymorpha in the Lower Sector of the Danube River and the Danube Delta

How accurate is the remote sensing based estimate of water physico-chemical parameters in the Danube Delta (Romania)?

Contact Info

Product

Resources

About