Article
Geology
Victor M. Giraldo-Gomez, Maria Rose Petrizzo, Elisabetta Erba, Cinzia Bottini
Summary: The study of benthic foraminiferal assemblages in ODP holes on Shatsky Rise revealed a progressive deepening of the region during the Early Cretaceous. The assemblages showed affinities with species from different bioprovinces, indicating a possible interconnectivity of ocean basins during this period.
CRETACEOUS RESEARCH
(2022)
Article
Geochemistry & Geophysics
Keiran A. Swart, Sergey Oleynik, Alfredo Martinez-Garcia, Gerald H. Haug, Daniel M. Sigman
Summary: By using foraminifera-bound organic matter (FBOM) delta C-13 as a potential proxy for dissolved CO2 concentration, researchers have achieved higher precision testing with new protocols and instruments. They found an inverse correlation between FBOM-delta C-13 and surface water [CO2(aq)], indicating the potential for FBOM-delta C-13 to serve as a paleoceanographic proxy for atmospheric pCO2.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Sifan Gu, Zhengyu Liu, Delia W. Oppo, Jean Lynch-Stieglitz, Alexandra Jahn, Jiaxu Zhang, Keith Lindsay, Lixin Wu
Summary: The study examines the factors contributing to the deglacial Atlantic mid-depth delta C-13 change, finding that the increased remineralization due to the weakened AMOC plays a dominant role in the decrease of delta C-13. The surface end-members should be used in diagnosing mechanisms of delta C-13 changes, as their remineralization is more critical than that along the transport pathway to the deep ocean.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
Arbia Jouini, Guillaume Paris, Guillaume Caro, Annachiara Bartolini, Sivia Gardin
Summary: The Mesozoic-Cenozoic transition is a period of significant disruptions in the biogeochemical cycle, with the Cretaceous-Paleogene boundary (K-Pg) crisis being the most notable one. This crisis resulted in the extinction of marine calcifiers due to the increase in atmospheric CO2 concentration and ocean acidification triggered by the Chicxulub Impact and Deccan volcanism. The Ca isotope composition of carbonate minerals can provide insights into these environmental changes. The study presents new records of planktonic and benthic foraminiferal & delta;44/40Ca, & delta;18O, & delta;13C, and Sr/Ca across the K-Pg transition, indicating rapid shifts in & delta;44/40Ca that are likely caused by changes in precipitation rates rather than global disequilibrium in the oceans' Ca budget.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Jay Lee, Rick J. Yang, Hui-Ling Lin, Yi-Chi Chen, Ren-Yi Cai-Li, Haojia Ren, James T. Liu
Summary: The declining trend of delta C-13 in tropical corals over the last century, caused by anthropogenic CO2 input, has been studied. Previous research suggested a weaker anthropogenic carbon signal in the Pacific and Indian Oceans compared to the Atlantic, but this study finds that the difference may be due to the specific environment in which the corals grew. Sediment records from the western Pacific suggest that the anthropogenic carbon signal is not weaker than in the Atlantic.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Ecology
Thulasi Thena, Kuppusamy Mohan, Muthusamy Prakasam, Kothandaraman Saravanan
Summary: The strong relationship between benthic foraminifera's habitat and morphological characteristics to their surrounding environment are dominant component in marine community, particularly in the Cascadia Margin at NE Pacific Ocean during the Pleistocene. The study indicates that the relative abundance rate of benthic foraminiferal community decreases with increasing core depth, indicating the influence of less ventilated and nutrient-enriched North Pacific Intermediate Water (NPIW). The disappearance of benthic faunas throughout the Early-Middle Pleistocene Transition (EMPT) period is attributed to increased cyclic seasonality and decreased food supply.
REGIONAL STUDIES IN MARINE SCIENCE
(2021)
Article
Multidisciplinary Sciences
Flavia Boscolo-Galazzo, Katherine A. Crichton, Andy Ridgwell, Elaine M. Mawbey, Bridget S. Wade, Paul N. Pearson
Summary: The study shows that the efficiency of the biological carbon pump increased with global ocean cooling, leading to increased food delivery at depth and the development of new deep-water niches, which triggered the evolution of deep plankton.
Article
Limnology
Wenjing Fu, Xiaomei Xu, Ellen M. Druffel, Xuchen Wang, Shuwen Sun, Chunle Luo, Hongmei Zhang, Di Fan
Summary: The study conducted carbon isotope analysis of sediment samples collected from the East China Sea, Yellow/Bohai Sea, and South China Sea, revealing that marine-derived young organic carbon degrades preferentially, resulting in high concentrations of DOC and DIC in pore water. A dual-isotope three-end-member model was used to estimate the contributions of different sources to SOC, DOC, and DIC. The research demonstrated that marginal sea sediments play a significant role in carbon and nutrient cycling in the ocean by acting as a major pathway for young DOC and DIC fluxes into the water column.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Geosciences, Multidisciplinary
Calie R. Payne, Christina L. Belanger
Summary: The study uses foraminifera to investigate the relationship between carbonate preservation and oxygen minimum zones (OMZs) in the Gulf of Alaska over the past 20,000 years. It finds that carbonate dissolution is most pronounced in areas with lower oxygen levels and during deglacial and early Holocene periods. The results suggest that metabolic dissolution driven by organic carbon respiration is a primary factor in carbonate preservation, especially in regions with high organic carbon export like OMZs.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2021)
Article
Multidisciplinary Sciences
Michelle Gelippi, Javier Caraveo-Patino, Marco F. W. Gauger, Brian N. Popp, Simone Panigada, Rocio Marcin-Medina
Summary: The distribution range and feeding behavior of eastern gray whales complicate the understanding of critical life-history events. This study used stable isotope mixing models to analyze the diet of lactating females and their calves. The results showed that benthic amphipods from the Bering Sea were not the primary food source for these whales, and different feeding strategies were observed among individuals. Prey from Vancouver Island were as important as those from the Bering Sea, and Ojo de Liebre Lagoon was consistently used as a feeding ground.
SCIENTIFIC REPORTS
(2022)
Article
Oceanography
Zofia Stachowska-Kaminska, Andrew J. Gooday, Teresa Radziejewska, Pedro Martinez Arbizu
Summary: This study analysed macrofaunal foraminifera in three abyssal sites in the Clarion-Clipperton Zone, finding that monothalamids were important components of the foraminiferal assemblages. Species richness and diversity were higher at impacted and resedimented sites compared to the control site, but the differences were not significant.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2022)
Article
Geosciences, Multidisciplinary
Gemma K. O'Connor, Kim M. Cobb, Hussein R. Sayani, Alyssa R. Atwood, Pamela R. Grothe, Samantha Stevenson, Julia K. Baum, Tianran Chen, Danielle C. Claar, Nicholas T. Hitt, Jean Lynch-Stieglitz, Richard A. Mortlock, Gavin A. Schmidt, Rachel Walter
Summary: The study presents reliable reconstructions of El Nino events using coral delta O-18 records from Kiritimati Island during the 2015/16 strong El Nino event. Results show that approximately 70% of the signal in coral delta O-18 anomalies is from sea surface temperature, while the remaining 30% is from seawater delta O-18 anomalies.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Ecology
Christiane Schmidt, Emmanuelle Geslin, Joan M. Bernhard, Charlotte LeKieffre, Mette Marianne Svenning, Helene Roberge, Magali Schweizer, Giuliana Panieri
Summary: Researchers conducted an experiment to investigate whether certain foraminifera feed on methane-oxidizing bacteria. The results showed that foraminifera can ingest methane-oxidizing bacteria through untargeted grazing. This study is important for understanding the role of foraminifera in the benthic food web.
Article
Geosciences, Multidisciplinary
Robert K. Poirier, Madison Q. Gaetano, Kimberly Acevedo, Morgan F. Schaller, Maureen E. Raymo, Reinhard Kozdon
Summary: This study introduces the Foraminiferal Preservation Index (FPI) to quantify the degree of diagenesis in benthic foraminifera, highlighting deep-ocean water mass composition as a primary driver of diagenesis over time. Stable isotope data from foraminiferal tests of varying preservation quality suggest significant biases in geochemical proxy records used to reconstruct past climate changes.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2021)
Article
Chemistry, Analytical
Claudia Lar, Stelian Radu, Emese Gal, Alexandra Falamas, Jozsef-Zsolt Szucs-Balazs, Claudiu Filip, Anca Petran
Summary: This study synthesized three new dopamine derivatives and characterized them through isotopic labeling. These compounds have significant applications in the research of polymerized analogues and polydopamine structures.
ANALYTICAL LETTERS
(2023)
Article
Multidisciplinary Sciences
Michael Lintner, Michael Schagerl, Bianca Lintner, Matthias Nagy, Petra Heinz
Summary: This study investigates the effects of different sunscreens on the photosymbionts of the benthic foraminifer H. depressa. Eco-friendly sunscreens have a greater negative impact on the health of foraminifera compared to conventional ones, possibly due to the toxic nature of metal nanoparticles present in them.
SCIENTIFIC REPORTS
(2022)
Article
Geosciences, Multidisciplinary
Kai Nils Nitzsche, Toshihiro Yoshimura, Naoto F. Ishikawa, Hiroto Kajita, Hodaka Kawahata, Nanako O. Ogawa, Katsuhiko Suzuki, Yusuke Yokoyama, Naohiko Ohkouchi
Summary: This study reconstructs the historical trace metal contamination in Osaka Bay and identifies anthropogenic sources and solid phases of trace metals by analyzing a sediment core. The results show an initial enrichment of Copper, Zn, and Pb from the 1670s, indicating human activities, and a significant increase in trace metal concentrations from the 1870s to the 1960s. The combination of zinc stable isotopes and chemical fractions provides a promising approach to assess trace metal sources and mobility in anthropogenically affected coastal areas.
PROGRESS IN EARTH AND PLANETARY SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Shirin Fassihi, Elena Kulagina, Petra Heinz, Fariba Shirezadeh Esfahani
Summary: This study reports the discovery of abundant foraminiferal faunas from the Ghaleh Formation in the Sanandaj-Sirjan Zone, Iran. Four successive assemblages with common species from other regions have been proposed. The study describes known species and a new species, and concludes that the area had a moderate to high-energy shallow marine warm environment.
GEOLOGICAL JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Michael Lintner, Manfred Wildner, Bianca Lintner, Wolfgang Wanek, Petra Heinz
Summary: This experiment investigates the presence of sequestered chloroplasts in foraminifera, specifically Elphidium williamsoni, through spectroscopic methods. It is found that under continuous illumination, the foraminifera incorporate chloroplasts from their algal food source, resulting in an increase in chlorophyll content. However, chlorophyll degradation in the dark is more complex, with chlorophyll still being detected after 113 days of starvation.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2023)
Article
History & Philosophy Of Science
Petra Lukeneder, Irene Liebhart, Franz Ottner, Anika Mikes, Petra Heinz, Radek Polach
Summary: The scientific world in the 19th century was greatly impacted by significant discoveries, expeditions, travel, and the development of natural scientific social networking. This study focuses on the Bilimek collection at the University of Natural Resources and Life Sciences Vienna, which contains numerous specimens and original labels with historical information. Through qualitative and quantitative analysis of these labels, the study aims to increase knowledge about Bilimek's life and social network, as well as uncover previously unknown social links within the scientific community of the 19th century.
NOTES AND RECORDS-THE ROYAL SOCIETY JOURNAL OF THE HISTORY OF SCIENCE
(2023)
Article
Biodiversity Conservation
Peter Kiss, Natalia Hudackova, Jurgen Titschack, Michael G. R. Siccha, Zuzana Hermanova, Lorand Silye, Andrej Ruman, Samuel Rybar, Michal Kucera
Summary: The evolution of a complex character in two different species suggests the influence of a common environmental factor.
Review
Multidisciplinary Sciences
Naohiko Ohkouchi
Summary: Food web research is expanding rapidly with the study of natural fractional abundance of 15N in individual amino acids. This paper provides an overview of the principles of this isotope approach and reanalyzes applications, as well as extends the discussion. The method applies kinetic isotope effects to enrich 15N in specific amino acids associated with metabolic processes, which has been demonstrated through observations in natural ecosystems and laboratory experiments. The application of this approach has proven to be successful in unraveling complex food webs and addressing various issues, such as estimating food chain length, assessing nitrogen resources, tracking fish migration, and reconstructing paleodiet.
PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES
(2023)
Article
Multidisciplinary Sciences
Hiroshi Naraoka, Yoshinori Takano, Jason P. Dworkin, Yasuhiro Oba, Kenji Hamase, Aogu Furusho, Nanako O. Ogawa, Minako Hashiguchi, Kazuhiko Fukushima, Dan Aoki, Philippe Schmitt-Kopplin, Jose C. Aponte, Eric T. Parker, Daniel P. Glavin, Hannah L. McLain, Jamie E. Elsila, Heather V. Graham, John M. Eiler, Francois-Regis Orthous-Daunay, Cedric Wolters, Junko Isa, Veronique Vuitton, Roland Thissen, Saburo Sakai, Toshihiro Yoshimura, Toshiki Koga, Naohiko Ohkouchi, Yoshito Chikaraishi, Haruna Sugahara, Hajime Mita, Yoshihiro Furukawa, Norbert Hertkorn, Alexander Ruf, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Kanako Sakamoto, Shogo Tachibana, Harold C. Connolly, Dante S. Lauretta, Masanao Abe, Toru Yada, Masahiro Nishimura, Kasumi Yogata, Aiko Nakato, Miwa Yoshitake, Ayako Suzuki, Akiko Miyazaki, Shizuho Furuya, Kentaro Hatakeda, Hiromichi Soejima, Yuya Hitomi, Kazuya Kumagai, Tomohiro Usui, Tasuku Hayashi, Daiki Yamamoto, Ryota Fukai, Kohei Kitazato, Seiji Sugita, Noriyuki Namiki, Masahiko Arakawa, Hitoshi Ikeda, Masateru Ishiguro, Naru Hirata, Koji Wada, Yoshiaki Ishihara, Rina Noguchi, Tomokatsu Morota, Naoya Sakatani, Koji Matsumoto, Hiroki Senshu, Rie Honda, Eri Tatsumi, Yasuhiro Yokota, Chikatoshi Honda, Tatsuhiro Michikami, Moe Matsuoka, Akira Miura, Hirotomo Noda, Tetsuya Yamada, Keisuke Yoshihara, Kosuke Kawahara, Masanobu Ozaki, Yu-ichi Iijima, Hajime Yano, Masahiko Hayakawa, Takahiro Iwata, Ryudo Tsukizaki, Hirotaka Sawada, Satoshi Hosoda, Kazunori Ogawa, Chisato Okamoto, Naoyuki Hirata, Kei Shirai, Yuri Shimaki, Manabu Yamada, Tatsuaki Okada, Yukio Yamamoto, Hiroshi Takeuchi, Atsushi Fujii, Yuto Takei, Kento Yoshikawa, Yuya Mimasu, Go Ono, Naoko Ogawa, Shota Kikuchi, Satoru Nakazawa, Fuyuto Terui, Satoshi Tanaka, Takanao Saiki, Makoto Yoshikawa, Sei-ichiro Watanabe, Yuichi Tsuda
Summary: The Hayabusa2 spacecraft successfully collected samples from the surface of the asteroid Ryugu and brought them back to Earth. Analyzing the organic molecules extracted from the samples, researchers found a variety of compounds formed by different reactions. These compounds, including amino acids and polycyclic aromatic hydrocarbons, are likely of non-biological origin and could have been formed through aqueous reactions on Ryugu's parent body, similar to organics found in meteorites.
Article
Multidisciplinary Sciences
Yasuhiro Oba, Toshiki Koga, Yoshinori O. Takano, Nanako Ogawa, Naohiko Ohkouchi, Kazunori Sasaki, Hajime P. Sato, Daniel P. Glavin, Jason Dworkin, Hiroshi Naraoka, Shogo Tachibana, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Sei-ichiro Watanabe, Yuichi Tsuda
Summary: Scientists have found uracil from the asteroid sample, which may have played a role in the early chemical evolution on Earth. They also discovered other organic molecules, including racemic amino acids. This study strongly suggests that prebiotic molecules like uracil commonly formed in carbonaceous asteroids and were delivered to the early Earth.
NATURE COMMUNICATIONS
(2023)
Correction
Multidisciplinary Sciences
Michael Lintner, Bianca Lintner, Michael Schagerl, Wolfgang Wanek, Petra Heinz
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
Toshihiro Yoshimura, Yoshinori Takano, Hiroshi Naraoka, Toshiki Koga, Daisuke Araoka, Nanako O. Ogawa, Philippe Schmitt-Kopplin, Norbert Hertkorn, Yasuhiro Oba, Jason P. Dworkin, Jose C. Aponte, Takaaki Yoshikawa, Satoru Tanaka, Naohiko Ohkouchi, Minako Hashiguchi, Hannah Mclain, Eric T. Parker, Saburo Sakai, Mihoko Yamaguchi, Takahiro Suzuki, Tetsuya Yokoyama, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Sei-ichiro Watanabe, Yuichi Tsuda, Shogo Tachibana, Kenji Hamase, Aogu Furusho, Kazuhiko Fukushima, Dan Aoki, Daniel P. Glavin, Hannah L. Mclain, Jamie E. Elsila, Heather V. Graham, John M. Eiler, Alexander Ruf, Francois-Regis Orthous-Daunay, Cedric Wolters, Junko Isa, Mayu Morita, Veronique Vuitton, Roland Thissen, Shin-ichiro M. Nomura, Haruna Sugahara, Hajime Mita, Yoshihiro Furukawa, Yoshito Chikaraishi, Morihiko Onose, Fumie Kabashima, Kosuke Fujishima, Hajime Sato, Kazunori Sasaki, Kuniyuki Kano, Junken Aoki, Tomoya Yamazaki, Yuki Kimura
Summary: Samples from asteroid Ryugu provide insights into the chemical evolution of organic molecules in the early solar system. The presence of sulfur-bearing soluble compounds suggests their role in the molecular evolution of prebiotic organic material.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Michael Siccha, Raphael Morard, Julie Meilland, Shinya Iwasaki, Michal Kucera, Katsunori Kimoto
Summary: This study used x-ray micro computed tomography to reconstruct three-dimensional images of 179 specimens of calcite shells of planktic foraminifera. The images provide a basis for further research on species' functional ecology, calcification intensity, and phylogenetic relationships.
Article
Multidisciplinary Sciences
Akihiro Tame, Tadashi Maruyama, Tetsuro Ikuta, Yoshihito Chikaraishi, Nanako O. Ogawa, Masashi Tsuchiya, Kiyotaka Takishita, Miwako Tsuda, Miho Hirai, Yoshihiro Takaki, Naohiko Ohkouchi, Katsunori Fujikura, Takao Yoshida
Summary: Controlling mTORC1 in mussels helps retain symbionts for nutrition, but the digestion of symbionts is triggered when the symbiotic bacteria's energy source is depleted.
Article
Multidisciplinary Sciences
Doron Pinko, Sigal Abramovich, Eyal Rahav, Natalia Belkin, Maxim Rubin-Blum, Michal Kucera, Raphael Morard, Maria Holzmann, Uri Abdu
Summary: Kleptoplasty, the sequestration of chloroplasts, has been discovered in the miliolid clade species Hauerina diversa, expanding the known distribution of this phenomenon. The functionality of the observed chloroplasts within the foraminiferal cytoplasm was confirmed through genetic analysis. Furthermore, the study suggests a relationship between kleptoplastic foraminifera and symbiotic foraminifera, as evidenced by phylogenetic analysis and the common ancestry of alveolinid symbionts and kleptoplasts.
Article
Ecology
Pauline Cornuault, Thomas Westerhold, Heiko Paelike, Torsten Bickert, Karl-Heinz Baumann, Michal Kucera
Summary: Marine plankton is an important part of the global carbon cycle. This study re-evaluates Neogene pelagic sediments in the tropical Atlantic and reveals significant orbital-scale variability in carbonate accumulation. It suggests that long-term changes in pelagic carbonate production are primarily controlled by orbital cycles in the tropical ocean.
