Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Guy Sisma-Ventura"'
Autor:
Guy Sisma-Ventura, Jacob Silverman, Yael Segal, Hagar Hauzer, Maria Abu Khadra, Nir Stern, Tamar Guy-Haim, Barak Herut
Publikováno v:
Environment International, Vol 187, Iss , Pp 108661- (2024)
Deep-sea habitats are currently recognized as a hot spot for mercury (Hg) accumulation from anthropogenic sources, resulting in elevated concentrations of total mercury (THg) in deep-sea megafauna. Among them, deep-sea sharks (Class Chondrichthyes) a
Externí odkaz:
https://doaj.org/article/f5bc13dd550442cb8cb5ed413d21bd7b
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-8 (2022)
Abstract The oceans play a major role in the earth’s climate by regulating atmospheric CO2. While oceanic primary productivity and organic carbon burial sequesters CO2 from the atmosphere, precipitation of CaCO3 in the sea returns CO2 to the atmosp
Externí odkaz:
https://doaj.org/article/2dac66200b1640598adadbb9f87faa4e
Autor:
Jeremy McCormack, Michael L. Griffiths, Sora L. Kim, Kenshu Shimada, Molly Karnes, Harry Maisch, Sarah Pederzani, Nicolas Bourgon, Klervia Jaouen, Martin A. Becker, Niels Jöns, Guy Sisma-Ventura, Nicolas Straube, Jürgen Pollerspöck, Jean-Jacques Hublin, Robert A. Eagle, Thomas Tütken
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-10 (2022)
Here the authors demonstrate the use of zinc isotopes (δ66Zn) to geochemically assess trophic levels in extant and extinct sharks. They show that the Neogene megatooth shark (Otodus megalodon) and the great white shark (Carcharodon carcharias) occup
Externí odkaz:
https://doaj.org/article/f88ad67ad5cf43d1acb974e5b5308b35
Autor:
Barak Herut, Maxim Rubin-Blum, Guy Sisma-Ventura, Yitzhak Jacobson, Or M. Bialik, Tal Ozer, Muhedeen Ajibola Lawal, Asaf Giladi, Mor Kanari, Gilad Antler, Yizhaq Makovsky
Publikováno v:
Frontiers in Marine Science, Vol 9 (2022)
Deep-sea anoxic brine pools are unique and extreme, yet habitable environments. However, their extent and processes of formation are not fully understood. Using geophysical analysis and seafloor surveying, we discovered the eastmost brine pools known
Externí odkaz:
https://doaj.org/article/e3b713aa96224dfbabf87fc531c9e9af
Publikováno v:
Frontiers in Marine Science, Vol 9 (2022)
The trophic ecology of fourteen species of demersal fishes and six species of demersal decapod crustaceans from the continental slope and rise of the Southeastern Mediterranean Sea (SEMS) was examined using stable isotope analysis. Mean δ13C values
Externí odkaz:
https://doaj.org/article/229609554a6341948b81248a06d69ff3
Autor:
Guy Sisma-Ventura, Nurit Kress, Jacob Silverman, Yaron Gertner, Tal Ozer, Eli Biton, Ayah Lazar, Isaac Gertman, Eyal Rahav, Barak Herut
Publikováno v:
Frontiers in Marine Science, Vol 7 (2021)
Long-term trends in oxygen, salinity, and nutrients were followed in the Southeastern Mediterranean (SEMS) deep waters from 2002 to 2020. Results show a net decrease in oxygen since 2008 of −0.5 ± 0.1 μmol kg−1 yr−1 in the bathypelagic depths
Externí odkaz:
https://doaj.org/article/6d0106b927174538b85cf0afa4c04eec
Autor:
Thomas Tütken, Michael Weber, Irit Zohar, Hassan Helmy, Nicolas Bourgon, Omri Lernau, Klaus Peter Jochum, Guy Sisma-Ventura
Publikováno v:
Frontiers in Ecology and Evolution, Vol 8 (2020)
Skeletal remains in archaeological strata are often assumed to be of similar ages. Here we show that combined Sr and O isotope analyses can serve as a powerful tool for assessing fish provenance and even for identifying fossil fish teeth in archaeolo
Externí odkaz:
https://doaj.org/article/b19914f987d74a0fbe8eaeda4aa9f5d5
Autor:
Michal Grossowicz, Or M. Bialik, Eli Shemesh, Dan Tchernov, Hubert B. Vonhof, Guy Sisma-Ventura
Publikováno v:
PeerJ, Vol 8, p e9355 (2020)
Climate, which sets broad limits for migrating species, is considered a key filter to species migration between contrasting marine environments. The Southeast Mediterranean Sea (SEMS) is one of the regions where ocean temperatures are rising the fast
Externí odkaz:
https://doaj.org/article/0bf99d4dc7884f07acacccce54133c1e
Autor:
Guy Sisma-Ventura, Eyal Rahav
Publikováno v:
Frontiers in Microbiology, Vol 10 (2019)
Phytoplankton and heterotrophic bacteria rely on a suite of inorganic and organic macronutrients to satisfy their cellular needs. Here, we explored the effect of dissolved inorganic phosphate (PO4) and several dissolved organic molecules containing p
Externí odkaz:
https://doaj.org/article/00431c0d6fab435baee631e0f57d04f9
Publikováno v:
Frontiers in Marine Science, Vol 6 (2019)
Stable isotope ratios were used to trace the impact of anthropogenically derived brine from desalination plants on organisms at different trophic levels (primary producers and consumers) along the highly urbanized ultra-oligotrophic Israeli coast (so
Externí odkaz:
https://doaj.org/article/550494981d1f4c9eaef663775ab66946