Results 11 to 20 of about 358 (131)
Effect of different seawater Mg<sup>2 +</sup> concentrations on calcification in two benthic foraminifers. [PDF]
Mar Micropaleontol, 2014 Magnesium, incorporated in foraminiferal calcite (Mg/CaCC), is used intensively to reconstruct past seawater temperatures but, in addition to temperature, the Mg/CaCC of foraminiferal tests also depends on the ratio of Mg and Ca in seawater (Mg/CaSW). The physiological mechanisms responsible for these proxy relationships are still unknown. This culture
Mewes A +4 more
europepmc +9 more sources
Evidence for complete denitrification in a benthic foraminifer [PDF]
Nature, 2006 Benthic foraminifera are unicellular eukaryotes found abundantly in many types of marine sediments. Many species survive and possibly reproduce in anoxic habitats, but sustainable anaerobic metabolism has not been previously described. Here we demonstrate that the foraminifer Globobulimina pseudospinescens accumulates intracellular nitrate stores and ...
Risgaard-Petersen, N. +12 more
openaire +7 more sources
Global Warming and Mass Extinctions Associated With Large Igneous Province Volcanism
Geophysical Monograph Series, Page 83-102., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
David P. G. Bond, Yadong Sun
wiley +1 more source
Nanoparticle-Biological Interactions in a Marine Benthic Foraminifer [PDF]
Scientific Reports, 2019 AbstractThe adverse effects of engineered nanomaterials (ENM) in marine environments have recently attracted great attention although their effects on marine benthic organisms such as foraminifera are still largely overlooked. Here we document the effects of three negatively charged ENM, different in size and composition, titanium dioxide (TiO2 ...
Ciacci, Caterina +13 more
openaire +5 more sources
Calcification acidifies the microenvironment of a benthic foraminifer (Ammonia sp.) [PDF]
Journal of Experimental Marine Biology and Ecology, 2012 Calcareous foraminifera are well known for their CaCO3 shells. Yet, CaCO3 precipitation acidifies the calcifying fluid. Calcification without pH regulation would therefore rapidly create a negative feedback for CaCO3 precipitation. In unicellular organisms, like foraminifera, an effective mechanism to counteract this acidification could be the ...
Martin S. Glas, Gerald Langer, Nina Keul
+7 more sources
A note on the laboratory culture of the benthic foraminifer Cornuloculina balkwilli (MacFadyen) [PDF]
BMC Research Notes, 2013 Genetic studies of the Foraminifera provide valuable insights into marine speciation and biogeography, yet the discovery of vitally needed new genetic markers for this important group is being severely limited by an extreme lack of genetic data.
Seears, Heidi A., Wade, Christopher M.
openaire +3 more sources
Light Impacts Mg Incorporation in the Benthic Foraminifer Amphistegina lessonii [PDF]
Frontiers in Marine Science, 2019 The ratio of Mg to Ca in foraminiferal calcium carbonate (Mg/Cacc) is a popular tool to reconstruct past sea water temperatures. Its application is being complicated by other environmental factors affecting the Mg/Cacc, including salinity and the ratio between sea water [Mg2+] and [Ca2+]. Furthermore, there is considerable intra-specimen variability in
Linda K. Dämmer +3 more
openaire +4 more sources
Journal of Fish Biology, EarlyView.Abstract Functional morphology highlights the adaptive flexibility of fish feeding strategies across environmental gradients and seasonal variations, providing key insights for the management and conservation of ichthyofaunal communities and their habitats.
Cristina Gioia Di Camillo +2 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.Abstract The North Qiangtang Block occupies a pivotal position within the eastern Tethyan realm, and its paleogeographic reconstruction is critical for constraining Tethyan geometry and evolution. However, its Late Paleozoic paleogeography and Paleo‐Tethyan Ocean–continent configuration remain controversial due to limited reliable age‐constrained ...
Jiahui Zhang +12 more
wiley +1 more source
People and Nature, Volume 8, Issue 6, Page 1957-1973, June 2026.Abstract Biological invasions are a major driver of biodiversity loss, yet inconspicuous or “cryptic” species often escape detection and public awareness, limiting management responses. We investigated the freshwater jellyfish Craspedacusta sowerbii, likely native to China and now present on six continents, through a 22‐month multilingual online survey
Guillaume Marchessaux +17 more
wiley +1 more source