News

Fossil evidence for vampire squid inhabiting oxygen-depleted ocean zones since at least the Oligocene

Abstract.

"A marked 120 My gap in the fossil record of vampire squids separates the only extant species (Vampyroteuthis infernalis) from its Early Cretaceous, morphologically-similar ancestors. While the extant species possesses unique physiological adaptations to bathyal environments with low oxygen concentrations, Mesozoic vampyromorphs inhabited epicontinental shelves. However, the timing of their retreat towards bathyal and oxygen-depleted habitats is poorly documented. Here, we document a first record of a post-Mesozoic vampire squid from the Oligocene of the Central Paratethys represented[...]"

 

Source: Communications Biology
Authors: Martin Košťák et al.
DOI: https://doi.org/10.1038/s42003-021-01714-0

Read the full article here.


The Ocean barcode atlas: A web service to explore the biodiversity and biogeography of marine organisms

Abstract.

"The Ocean Barcode Atlas (OBA) is a user friendly web service designed for biologists who wish to explore the biodiversity and biogeography of marine organisms locked in otherwise difficult to mine planetary scale DNA metabarcode data sets. Using just a web browser, a comprehensive picture of the diversity of a taxon or a barcode sequence is visualized graphically on world maps and interactive charts. Interactive results panels allow dynamic threshold adjustments and the display of diversity results[...]"

 

Source: Wiley Online Library
Authors: Caroline Vernette et al.
DOI: https://doi.org/10.1111/1755-0998.13322

Read the full article here.


Variability-based constraint on ocean primary production models

Abstract.

"Primary production (PP) is fundamental to ocean biogeochemistry, but challengingly variable. Satellite models are unique tools for investigating PP, but are difficult to compare and validate because of the scale separation between in situ and remote measurements, which also are rarely coincident. Here, I argue that satellite estimates should be log-skew-normally distributed, because of this scale separation and because PP measurements are log-normally distributed.[...]"

 

Source: ASLO- Association for the Sciences of the Limnology and Oceanography 
Authors: B. B. Cael et al.
DOI: https://doi.org/10.1002/lol2.10196

Read the full article here.


Developing achievable alternate futures for key challenges during the UN Decade of Ocean Science for Sustainable Development

Abstract.

"The oceans face a range of complex challenges for which the impacts on society are highly uncertain but mostly negative. Tackling these challenges is testing society’s capacity to mobilise transformative action, engendering a sense of powerlessness. Envisaging positive but realistic visions of the future, and considering how current knowledge, resources, and technology could be used to achieve these futures, may lead to greater[...]"

 

Source: Reviews in Fish Biology and Fisheries
Authors: Kirsty L. Nash et al.
DOI: https://doi.org/10.1007/s11160-021-09635-1

Read the full article here.


Protecting the global ocean for biodiversity, food and climate

Abstract.

"The ocean contains unique biodiversity, provides valuable food resources and is a major sink for anthropogenic carbon. Marine protected areas (MPAs) are an effective tool for restoring ocean biodiversity and ecosystem services1,2, but at present only 2.7% of the ocean is highly protected3. This low level of ocean protection is due largely to conflicts with fisheries and other extractive uses. To address this issue[...]"

 

Source: Nature
Authors: Enric Sala et al.
DOI: https://doi.org/10.1038/s41586-021-03371-z

Read the full article here.


The effects of historical ozone changes on Southern Ocean heat uptake and storage

Abstract.

"Atmospheric ozone concentrations have dramatically changed in the last five decades of past century. Herein we explore the effects of historical ozone changes that include stratospheric ozone depletion on Southern Ocean heat uptake and storage, by comparing CESM1 large ensemble simulations with fixed-ozone experiment. During 1958–2005, the ozone changes contribute to about 50% of poleward intensification of the Southern Hemisphere westerly winds in historical simulations, which intensifies the Deacon Cell and residual meridional overturning circulation, thus contributing to heat redistribution[...]"

 

Source: Climate Dynamics
Authors: Shouwei Li et al.
DOI: https://doi.org/10.1007/s00382-021-05803-y

Read the full article here.


Reactive Nitrogen Cycling in the Atmosphere and Ocean

Abstract.

"The budget of reactive nitrogen (Nr; oxidized and reduced inorganic and organic forms of nitrogen) has at least doubled since the preindustrial era due to human activities. Excess Nr causes significant detrimental effects on many terrestrial and aquatic ecosystems; less is known about the impact on the open ocean. Nr deposition may already rival biological N2 fixation quantitatively and will likely continue to rise.[...]"

 

Source: Annual Review of Earth and Planetary Sciences
Authors: Katye E. Altieri et al.
DOI: https://doi.org/10.1146/annurev-earth-083120-052147

Read the full article here.


Marine Litter Windrows: A Strategic Target to Understand and Manage the Ocean Plastic Pollution

Abstract.

"Windrow is a long-established term for the aggregations of seafoam, seaweeds, plankton and natural debris that appear on the ocean surface. Here, we define a “litter windrow” as any aggregation of floating litter at the submesoscale domain (<10 km horizontally), regardless of the force inducing the surface convergence, be it wind or other forces such as tides or density-driven currents. The marine litter windrows observed to date usually form stripes[...]"

 

Source: Frontiers
Authors: Andrés Cózar et al.
DOI: https://doi.org/10.3389/fmars.2021.571796

Read the full article here.


Heavy iron in large gem diamonds traces deep subduction of serpentinized ocean floor

Abstract.

"Subducting tectonic plates carry water and other surficial components into Earth’s interior. Previous studies suggest that serpentinized peridotite is a key part of deep recycling, but this geochemical pathway has not been directly traced. Here, we report Fe-Ni–rich metallic inclusions in sublithospheric diamonds from a depth of 360 to 750 km with isotopically heavy iron (δ56Fe = 0.79 to 0.90‰) and unradiogenic osmium[...]"

 

Source: AAAS
Authors: Evan M. Smith et al.
DOI: 10.1126/sciadv.abe9773

Read the full article here.


Ocean currents as a potential dispersal pathway for Antarctica’s most persistent non-native terrestrial insect

Abstract.

"The non-native midge Eretmoptera murphyi is Antarctica’s most persistent non-native insect and is known to impact the terrestrial ecosystems. It inhabits by considerably increasing litter turnover and availability of soil nutrients. The midge was introduced to Signy Island, South Orkney Islands, from its native South Georgia, and routes of dispersal to date have been aided by human activities, with little known about non-human-assisted methods of dispersal. This study is the first to determine the potential for dispersal [...]"

 

Source: Polar Biology
Authors: Jesamine C. Bartlett et al.
DOI:https://doi.org/10.1007/s00300-020-02792-2

Read the full article here.


Showing 1 - 10 of 36 results.
Items per Page 10
of 4