Distribution of modern benthic foraminifera from fjords of Svalbard, European Arctic

Atlantic Water advection vs. glacier dynamics in northern Spitsbergen since early deglaciation

“…4d). The epibenthic species C. lobatulus -commonly connected to strong bottom currents (Hald and Korsun, 1997;Hansen and Knudsen, 1995;Steinsund, 1994) -displays slightly increased proportions during this time period (Fig. 5b).…”

“…The occurrence of C. neoteretis has been connected with a strong influence of AW in bottom waters because this species is assumed to respond to a limited temperature and salinity range as well as to an enhanced food supply (Jennings et al, 2004;Jennings and Helgadottir, 1994;Mackensen et al, 1985;Rytter et al, 2002;Seidenkrantz, 1995;Seidenkrantz et al, 2013;Steinsund, 1994). C. reniforme also prefers saline bottom waters (Hald and Korsun, 1997;Jennings et al, 2004) (Brassell et al, 1986;Müller et al, 1998). (b) Phytoplankton (brassicasterol)-IP 25 index (PIP 25 ); 0.3 to 0.5: reduced sea ice cover ( * ), 0.5 to 0.7: seasonal sea ice cover ( * * ), 0.7: extended to perennial sea ice cover ( * * * ) (Müller et al, 2011).…”

“…5h). C. reniforme may indicate more saline conditions in bottom waters linked to the presence of AW at the sea floor (Hald and Korsun, 1997;Jennings et al, 2004;Jennings and Helgadottir, 1994). Enhanced percentages of the opportunistic species E. clavatum (up to ∼ 28 % Fig.…”

Intra-annual Variability in Benthic Foraminiferal Abundance in Sediments of Disenchantment Bay, an Alaskan Glacial Fjord

“…3) (Hald and Korsun, 1997;Hald, 1998, 2000;Gustafsson and Nordberg, 2001;Majewski, 2005). Elphidium spp.…”

“…Few studies have focused on Holocene foraminifera in coastal Alaska (Bergen and O'Neil, 1979;Quinterno et al, 1979;Echols and Armentrout, 1980); however, analysis of grab samples showed a reduction in the species diversity between open-marine Yakutat Bay (YB) and glacier-influenced DB (Echols and Armentrout, 1980). Observed taxa were dominated by those typical of highlatitude, glacier-proximal environments Hald, 1998, 2000;Hald and Korsun, 1997;Majewski, 2005;Jennings et al, 2004), including Elphidium excavatum f. clavatum, Elphidium frigidum, Elphidium subarcticum, and Textularia earlandi (Appendix). The purpose of this study is to describe variations in benthic foraminiferal abundance within fjord sediment on an annual time scale.…”