B Hellmann's research while affiliated with University of Greifswald and other places
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Publications (2)
Nycthemeral variations in oxygen concentrations have been compared in the maximum turbidity zone of three European estuaries, the Elbe, the Westerschelde and the Gironde. It appears that oxygen concentration increases during the day in the Elbe and the Westerschelde due to biological processes, but not in the Gironde where physical processes domina...
Citations
... Among others, it is hypothesized that the observed decline in recruitment is linked to a shift in the retention performance of the GWB, caused by changes in the atmospheric forcing. Studies on the lagoon hydrography seem to support this hypothesis, suggesting that its water exchange has a high interannual variability (Stigge, 1989; Buckmann et al., 1998; J€ onsson et al., 1998). To test this hypothesis for this specific stock and to improve the general understanding of the function of coastal larval retention areas for recruitment success, a modelling approach was applied. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/279702213283841-1443697612485_Q64/Alexander-Weidauer.jpg)
... The analysis of Pto,Cuatreros and Pto.Ing White time series has shown a slightly lower mean values at IW than at PC, and in both cases the maximum values have been recorded during stormy winters. This distribution trend agreed with the reports from other authors for different estuaries at other latitudes, not only obtained from field work (Irigoien et al. 1999) but also from remote sensing ones (Chen et al. 2007). ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/457598202847234-1486111321523_Q64/Xabier-Irigoien.jpg)
