Environmental impact assessment of sediment dumping in the southern Baltic Sea using meiofaunal indicators

Frenzel, Peter; Borrmann, Corinna; Lauenburg, Beate; Bohling, Björn; Bartholdy, Jan

doi:10.1016/j.jmarsys.2007.01.016

Cited by 11 publications

(5 citation statements)

References 10 publications

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“…The chambers were slightly inflated and the umbilicus was depressed and covered with small pustules (Plate 1). Morphotypes with a similar size (360 µm) have been recorded from 19 m water depth at Wismar Bight, southern Baltic Sea (Frenzel et al, 2009), and were identified as Haynesina germanica. The specimens from Bottsand, however, were lacking diagnostic features of H. germanica, in particular the collar of pustules at the base of the apertural face of the last chamber (Austin et al, 2005), the smooth, transparent chamber wall, the widened sutures close to the umbilicus, and the tendency of evolute, oblique coiling.…”

Section: Recognition Of Elphidium Incertummentioning

confidence: 82%

“…Analysing the 0-1 cm level was common practice in foraminiferal surveys in the Baltic Sea (e.g. Lutze, 1965;Schönfeld and Numberger, 2007;Polovodova et al, 2009;Frenzel et al, 2009). At Bottsand, the uppermost 5 cm were sampled in 1964-1967(Lutze, 1968a, and the 0-1 cm interval was sampled in 1996-1998(Lehmann, 2000.…”

Section: Methodsmentioning

confidence: 99%

“…The sample vol- (Frenzel et al, 2009); (e) Boknis Eck (Schönfeld and Numberger, 2007); (f) Arkona Basin (Lutze, 1965). The demarcation of the Baltic Sea, Kattegat, and Skagerrak is applied according to the definition of the International Hydrographic Organisation (IHO, 1953). ume was marked on the bottle immediately after sampling.…”

Section: Methodsmentioning

confidence: 99%

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Monitoring benthic foraminiferal dynamics at Bottsand coastal lagoon (western Baltic Sea)

Schönfeld

2018

J. Micropalaeontol.

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Abstract. Benthic foraminifera from Bottsand coastal lagoon, western Baltic Sea, have been studied since the mid-1960s. They were monitored annually in late autumn since 2003 at the terminal ditch of the lagoon. There were 12 different species recognised, of which three have not been recorded during earlier investigations. Dominant species showed strong interannual fluctuations and a steady increase in population densities over the last decade. Elphidium incertum, a stenohaline species of the Baltic deep water fauna, colonised the Bottsand lagoon in 2016, most likely during a period of salinities >19 units and water temperatures of 18 • C on average in early autumn. The high salinities probably triggered their germination from a propagule bank in the ditch bottom sediment. The new E. incertum population showed densities higher by an order of magnitude than those of the indigenous species. The latter did not decline, revealing that E. incertum used another food source or occupied a different microhabitat. Elphidium incertum survived transient periods of lower salinities in late autumn 2017, though with reduced abundances, and became a regular faunal constituent at the Bottsand lagoon.

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Section: Recognition Of Elphidium Incertummentioning

confidence: 82%

Section: Methodsmentioning

confidence: 99%

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Monitoring benthic foraminiferal dynamics at Bottsand coastal lagoon (western Baltic Sea)

Schönfeld

2018

J. Micropalaeontol.

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“…The dredging and dumping of spoils at sea inevitably increase the turbidity levels and settlement of fine sediment over an extended area [9,10]. This can propagate to a large area around the dumped location [11][12][13][14][15][16][17][18]. The dumping of spoils can lead to the smothering of the seabed environment, coral reefs, egg-laying nests of fish and can disturb their navigations [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Assessment of the Environmental Impacts of Dredging and Dumping Activities at Sea

2019

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The dumping of dredge materials often raises concerns about the release of pollutants to the marine environment. Wind data from the Global Forecast System (GFS) model was used to simulate the wind-wave propagation from offshore in a two-dimensional (2D) model during September and October 2016. The calibration and validation of the 2D model showed a high conformity in both the phases and amplitude between the observed and simulated data. The 2D mud transport simulation results of three scenarios showed that the concentration of suspended material in the third scenario tested (scenario 3) was greater than 0.004 kg/m3 in the low tide, spreading to a 9 km2 area, and in the high tide, the concentration was 0.004 kg/m3 in a 6 km2 area. Finally, the results of 2D particle tracking (PT) showed changes in the seabed due to the concentration of dredged material, and its dump (approximately 180 days) increased from 0.08 m to 0.16 m in 2.85 ha. In scenario 3, the element block moved quite far—approximately 2.9 km—from the dredge position. Therefore, the simulation results were qualified, as the dredging position situated far from the sea is significantly affected by the direction and velocity of wave-wind in the dredging position.

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“…Acessibilidade dos portos costeiros, portos de pesca e vias navegáveis é vital para o crescimento econômico das regiões costeiras (Regoli et al, 2002;Frenzel, et al, 2009). Infelizmente essas áreas raramente são naturalmente profundas e as profundidades navegáveis devem ser mantidas por repetidas dragagem.…”

Section: Introductionunclassified

Mapeamento dos impactos ambientais dos rejeitos da dragagem do porto do Rio de Janeiro, através de métodos acústicos, em áreas da plataforma continental

Batista¹,

Silva²,

Coelho³

et al. 2018

Proceedings of the VIII Simpósio Brasileiro E Geofísica

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Environmental impact assessment of sediment dumping in the southern Baltic Sea using meiofaunal indicators

Cited by 11 publications

References 10 publications

Monitoring benthic foraminiferal dynamics at Bottsand coastal lagoon (western Baltic Sea)

Monitoring benthic foraminiferal dynamics at Bottsand coastal lagoon (western Baltic Sea)

Quantitative Assessment of the Environmental Impacts of Dredging and Dumping Activities at Sea

Mapeamento dos impactos ambientais dos rejeitos da dragagem do porto do Rio de Janeiro, através de métodos acústicos, em áreas da plataforma continental

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