Results 71 to 80 of about 2,311 (179)

Organic matter respiration stoichiometry in the Arctic Ocean is linked to shifts in plankton community composition

Limnology and Oceanography, Volume 71, Issue 5, May 2026.
Abstract The global rate of ocean deoxygenation may be influenced by the molar ratio of dissolved oxygen to organic carbon consumed during microbial respiration. However, respiration stoichiometry and its environmental controls are not fully understood due to sparse direct measurements and limited global coverage.
Skylar D. Gerace, Tia Chung‐Swanson, Adam J. Fagan, Melissa L. Brock, Lee W. Cooper, Seth Danielson, Carin Ashjian, Jacqueline M. Grebmeier, Adam C. Martiny   +8 more
wiley   +1 more source

Loss of fixed nitrogen causes net oxygen gain in a warmer future ocean

Nature Communications, 2019
Ocean anoxic events threaten marine ecosystems, and they are predicted to increase as the climate warms. Using model simulations, Oschlies and colleagues show that in spite of rising temperatures, after transitory deoxygenation, microbial denitrification
Andreas Oschlies, Wolfgang Koeve, Angela Landolfi, Paul Kähler   +3 more
doaj   +1 more source

Zooplankton diel vertical migration enhances carbon export via distinct mechanisms in a warming North Pacific

Limnology and Oceanography Letters, Volume 11, Issue 3, May 2026.
Abstract Zooplankton diel vertical migration (DVM) is a crucial marine organism behavior modulating particulate organic carbon (POC) export, yet its dynamic role under climate change remains uncertain. Using a coupled physical–biogeochemical model, we assessed how DVM affects carbon export under future scenarios at two contrasting North Pacific sites ...
Chenying Guo, Peng Xiu, Lianyi Zhang
wiley   +1 more source

Altered greenhouse gas emissions in shallow lakes invaded by common carp (Cyprinus carpio)

Limnology and Oceanography Letters, Volume 11, Issue 3, May 2026.
Abstract Species invasions are among the most important environmental problems facing freshwater ecosystems this century, contributing to biodiversity loss and changes in ecosystem function. Freshwater lakes are an important component of the global carbon cycle and a key source of atmospheric greenhouse gases, yet the consequences of species invasions ...
Joseph S. Rabaey, Brian J. Huser, Przemyslaw G. Bajer, John A. Downing   +3 more
wiley   +1 more source

High-frequency dynamics of pH, dissolved oxygen, and temperature in the coastal ecosystems of the Tanga-Pemba Seascape: implications for upwelling-enhanced ocean acidification and deoxygenation

Frontiers in Marine Science
Ocean acidification, deoxygenation, and warming are three interconnected global change challenges caused by increased anthropogenic carbon emissions. These issues present substantial threats to marine organisms, ecosystems, and the survival of coastal ...
Rushingisha George, Samson Job, Masumbuko Semba, Elinasi Monga, Blandina Lugendo, Arthur Omondi Tuda, Ismael Kimirei   +6 more
doaj   +1 more source

Impacts of Global Change on Ocean Dissolved Organic Carbon (DOC) Cycling

Frontiers in Marine Science, 2020
The marine dissolved organic carbon (DOC) pool is an important player in the functioning of marine ecosystems. DOC is at the interface between the chemical and the biological worlds, it fuels marine food webs, and is a major component of the Earth’s ...
Christian Lønborg, Cátia Carreira, Tim Jickells, Xosé Antón Álvarez-Salgado   +3 more
doaj   +1 more source

Life after death in the pelagic: Non‐predatory zooplankton mortality and the “ghost carbon pump”

Limnology and Oceanography Letters, Volume 11, Issue 3, May 2026.
Abstract The biological carbon pump is traditionally framed as a trophically mediated process in which zooplankton mortality is attributed mainly to predation, routing carbon through fecal pellets and higher trophic levels before export. Increasing evidence, however, shows that nonpredatory mortality—caused by different environmental stressors—accounts
Albert Calbet
wiley   +1 more source

Investigating the role that the Southern Ocean biological pump plays in determining global ocean oxygen concentrations and deoxygenation

, 2013
Global ocean circulation connects marine biogeochemical cycles through the long-range transport of nutrients and oxygen with the Southern Ocean (SO) acting as a water mass crossroads. The biological pump in the SO has been shown to play an important role
Keller, David, Oschlies, Andreas
core  

Acceleration of ocean warming, salinification, deoxygenation and acidification in the surface subtropical North Atlantic Ocean

, 2020
Ocean chemical and physical conditions are changing. Here we show decadal variability and recent acceleration of surface warming, salinification, deoxygenation, carbon dioxide (CO2) and acidification in the subtropical North Atlantic Ocean (Bermuda ...
Bates, Nicholas, Johnson, Rodney J., Rodney J. Johnson, Nicholas Robert Bates   +3 more
core   +1 more source

Global ocean gridded dataset and hypoxic zone expansion: reconstructed dissolved oxygen (1960–2021) based on machine learning technique

International Journal of Digital Earth
Due to global warming and the excessive input of nutrients resulting from human activities, ocean deoxygenation is gradually intensifying. However, the sparse spatiotemporal distribution of in situ global dissolved oxygen (DO) observations poses a ...
Yanjun Wang, Jinming Song, Xuegang Li, Guorong Zhong, Shuangqiang Zheng, Xiaofeng Li   +5 more
doaj   +1 more source