Submarine groundwater discharge (SGD) can have a profound influence on marine environments and elemental biogeochemical cycles in coastal waters. We explored the feasibility of using Ba/Ca ratios benthic foraminiferal shells as proxy SGD. Dissolved barium (DBa) displayed enrichment behavior bottom waters indicating that SGD is major DBa source Changjiang (Yangtze) Estuary. Foraminifera lived wi...

Understanding the interaction between climate and biotic evolution is crucial for deciphering the sensitivity of life. An enigmatic mass extinction occurred in the deep oceans during the Mid Pleistocene, with a loss of over 100 species (20%) of sea floor calcareous foraminifera. An evolutionarily conservative group, benthic foraminifera often comprise >50% of eukaryote biomass on the deep-ocean...

—Foraminiferal tests are a common component of many marine sediments. The oxygen isotope ratio (δ18O) of test calcite is frequently used to reconstruct aspects of their life environment. The δ18O depends mainly on the isotope ratio of the water it is precipitated from, the temperature of calcification, and, to a lesser extent, the carbonate ion concentration. Foraminifera and other organisms ca...

Deep-sea floors represent one of the largest and most complex ecosystems on Earth but remain essentially unexplored. The vastness and remoteness of this ecosystem make deep-sea sampling difficult, hampering traditional taxonomic observations and diversity assessment. This problem is particularly true in the case of the deep-sea meiofauna, which largely comprises small-sized, fragile, and diffic...

The possible effects of environmental factors on the dimorphic mode of reproduction in benthic foraminifera have been reported in the literature. Published observations based on field samples have indicated an inverse relationship between the ratio of microspheric/megalospheric forms and temperature or salinity. These findings imply their potential use in palaeoclimatic studies. Two experiments...

This study reconsiders the previous biostratigraphic settings for Asmari Formation in eastern Zagros Basin (Fars Basin). The results imply that Rupelian is identified by total range zone of Nummulites species (N. vascus, N. fichteli, intermedius). occurrence Archaias kirkukensis, A. hensoni, and asmaricus before disappearance current even co-occurrence hensoni with mentioned prevents use recent...

The species diversity of benthic foraminifera at four abyssal working areas in the Labrador Sea, Basin, and Southwest Azores is documented. One hundred fifty taxa (forty-three not assigned to a species) were found their was recorded. twenty-four (fifteen illustrated with optical and/or SEM (Scanning Electron Microscope) images on twelve plates. material sampled during RV Sonne cruise SO286 as p...