Results 81 to 90 of about 1,403,380 (198)

Iron fertilization–induced deoxygenation of eastern equatorial Pacific Ocean intermediate waters during the Paleocene–Eocene thermal maximum

Geology
The Paleocene–Eocene thermal maximum (PETM), a transient period of global warming, is considered to be an important analog for future greenhouse conditions. It was accompanied by a significant carbon cycle perturbation.
Xiao-Dong Jiang, Xiang-Yu Zhao, Xiaoming Sun, A. P. Roberts, A. Sluijs, Yu-Min Chou, Wei-Qi Yao, Jie-Qi Xing, Weijie Zhang, Qing-Song Liu   +9 more
semanticscholar   +1 more source

Marine Functional Connectivity Contributes to Ecosystem Functioning Across Multiple Scales

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 9, September 2026.
ABSTRACT The passive transport and active movements of marine organisms between habitats and ecosystems, known as marine functional connectivity, play a critical role in the functioning of marine ecosystems. However, marine functional connectivity, particularly at large spatial scales, is often understudied, and consequently tends to be overlooked in ...
Lucía López‐López, Konstantina Agiadi, Francisco R. Barboza, Andreu Blanco, Federica Costantini, Antonio Di Franco, Carolina Giraldo, Katell Guizien, Tamar Guy‐Haim, Cintia O. Quintana, Audrey Darnaude, Miguel Cabanellas‐Reboredo, Andrea Campos‐Candela, Fábio L. Matos, Ángel Pérez‐Ruzafa, Andreas Reul, Gil Rilov, Vincent Rossi, Enrico Ser‐Giacomi, Ester Serrao, Anna M. Sturrock, Susanne Tanner, Ant Türkmen, Manuel Hidalgo   +23 more
wiley   +1 more source

Compound Hypoxia With Heat or Acidification Stress Induces Synergistic and Additive Effects on Coral Physiology

Global Change Biology Communications, Volume 1, Issue 3, September 2026.
Multi‐stressor experiments on three coral species demonstrate hypoxia produces mostly additive effects with acidification but synergistically amplifies physiological stress under elevated temperatures. As global and local environmental change increase compound stress events on coral reefs, distinguishing hypoxia‐driven effects and interactive stressor ...
Kelly W. Johnson, Rebecca van Oostveen, Rene M. van der Zande, Noelle M. Lucey, Verena Schoepf   +4 more
wiley   +1 more source

Expanded subsurface ocean anoxia in the Atlantic during the Paleocene-Eocene Thermal Maximum

Nature Communications
The ocean has experienced substantial oxygen loss over recent decades, affecting marine ecosystems and fisheries. Investigating ocean deoxygenation during hyperthermal events, such as the Paleocene-Eocene Thermal Maximum (PETM), offers insights into its ...
Weiqi Yao, Tianshu Kong, Xingchen Tony Wang, Ruixiang Zhai, Ruiling Zhang, Yilin Liu   +5 more
doaj   +1 more source

Shifts in magnetic mineral assemblages support ocean deoxygenation before the end-Permian mass extinction

Communications Earth & Environment
Expansion of oceanic anoxia is a prevailing hypothesis for driving the marine end-Permian mass extinction and is mainly based on isotopic geochemical proxies.
Min Zhang, Hua-Feng Qin, Yi-Fei Hou, Kuang He, Cheng-Long Deng, Shu-zhong Shen, Yonxin Pan   +6 more
semanticscholar   +1 more source

Spatial and temporal patterns of bottom water euxinia in shallow areas of the southwestern Baltic Sea

Limnology and Oceanography, Volume 71, Issue 9, September 2026.
Abstract Sediments in productive coastal regions are hotspots of hydrogen sulfide (H2S) production through microbial sulfate reduction. Under anoxic seafloor conditions, H2S can escape the sediment and accumulate in bottom waters, where elevated concentrations render the benthic environment toxic, posing ecological and economic risks.
Timo Spiegel, Matthias Thiele, Mark Schmidt, Ulrike Löptien, Heiner Dietze, René Friedland, Hermann W. Bange, Sarima Vahrenkamp, Mirjam Perner, Florian Scholz   +9 more
wiley   +1 more source

Climatic controls on metabolic constraints in the ocean [PDF]

Biogeosciences
Observations and models indicate that climate warming is associated with the loss of dissolved oxygen from the ocean. Dissolved oxygen is a fundamental requirement for heterotrophic marine organisms (except marine mammals) and, since the basal metabolism
P. Mongwe, P. Mongwe, M. Long, T. Ito, C. Deutsch, Y. Santana-Falcón   +5 more
doaj   +1 more source

Shallow ocean deoxygenation drove trilobite turnover during the late Cambrian SPICE event

Geology
The spread of marine anoxia is believed to have played a key role in the development of the SPICE (Steptoean Positive Carbon Isotope Excursion) event and the end-Marjuman extinction in the late Cambrian (∼497.5 m.y.
Aihua Yang, Bo Chen, Zhixin Sun, R. Tostevin, Tianchen He, Xi Chen, Ji-Tao Chen, Miao Lu, Chunlin Hu, Shengxian Du, Jun Chen, W. Jiao, Maoyan Zhu   +12 more
semanticscholar   +1 more source

Sedimentary lycopane/n‐C31 ratio as a proxy for bottom water hypoxia in coastal ocean

Limnology and Oceanography Letters, Volume 11, Issue 5, September 2026.
Abstract Bottom‐water hypoxia on continental shelves is intensifying under climate change and eutrophication, yet long‐term records remain scarce. Here we show that the sedimentary lycopane/n‐C31 ratio reliably records bottom‐water oxygenation in the seasonally hypoxic Yangtze River Estuary.
Qingnan Song, Huamao Yuan, Jinming Song, Guiling Zhang, Fengmin Pan, Xuegang Li, Liqin Duan   +6 more
wiley   +1 more source

Stage‐specific vulnerability: Ocean acidification and hypoxia impair copepod recruitment through a naupliar bottleneck

Limnology and Oceanography Letters, Volume 11, Issue 5, September 2026.
Abstract Progressive ocean acidification and deoxygenation are expected to threaten many marine zooplankton, but their combined effects across life stages remain poorly understood. We investigated stage‐specific responses of the egg‐carrying copepod Pseudodiaptomus annandalei to changes in pHT (5.97–8.05) and dissolved oxygen (DO; 0.90–8.20 mg L−1 ...
Weijia Chen, Kunshan Gao
wiley   +1 more source