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Tag: "ocean" at biology news

Envisat captures first image of Sargassum from space

... understand better the primary productivity of the ocean and better predict climate change. Credit: ESA Sa... understand better the primary productivity of the ocean and better predict climate change. Using optical radiance data from the Medium Resolution Imaging...

Caribbean frogs started with a single, ancient voyage on a raft from South America

...The study's DNA research revealed that, while many ocean dispersals may have occurred over time, only two l...e washed out of rivers during storms and caught in ocean currents, can be more than a mile across and could include plants that trap fresh water and insect f...

Salty oceans provide early warning for climate change

Monitoring the saltiness of the ocean water could provide an early indicator of climate ...nal water from surrounding areas, and initiates an ocean circulation loop called thermohaline overturning. The scientists discovered that a build up of sa...

Marine phytoplankton changes form to protect itself from different predators

...mes part of fecal packages that sink into the deep ocean where a portion of that carbon is sequestered – thereby reducing atmospheric carbon dioxide, a leading greenhouse gas. If consumed by smaller creatures like ciliates, less of the carbon sinks to the deep sea and more remains in the surface waters. ...

The kapok connection -- Study explains rainforest similarities

...luded that extreme long distance travel by wind or ocean currents explains how the trees spread from South America to Africa. He plans to continue investigating the role of oceanic dispersal to see if the same is true for other species and for entire plant communities. "This tree has become locally exti...

Antarctic icebergs -- Hotspots of ocean life

... – are having a major impact on the ecology of the ocean around them, serving as “hotspots” for ocean life, with thriving communities of seabirds above and a web of phytoplankton, krill, and fish below....

Healthy coral reefs hit hard by warmer temperatures

...hers have conclusively linked disease severity and ocean temperature. Close living quarters among coral may make it easy for infection to spread, researchers have found. "With this study, speculation about the impacts of global warming on the spread of infectious diseases among susceptible marine species ...

'Short-circuit' found in ocean circulation

Scientists have discovered how ocean circulation is working in the current that flows around Antarctica by tracing the path of helium from underwater volcanoes. The details are published in Nature this week. The team, led by Alberto Naveira Garabato of the National Oceanography Centre,...

Scientists discover new life in the Antarctic deep sea

...ell Sea provide new insights into the evolution of ocean life. Reporting this week in the journal Nature, ...the source for much of the deep water in the world ocean ?are likely to be related to animals living in both the adjacent shallower waters and in other parts...

Study warns deep-sea mining may pose serious threat to fragile marine ecosystems

...manganese nodules that exist on the surface of the ocean floor. However, high projected costs and the regul...as well as local subsistence fishers. Depending on ocean currents, these nutrients could drift widely, disrupting the food chain and potentially damaging eco...

MIT's ocean model captures diversity of underwater forests

Scientists at MIT have created an ocean model so realistic that the virtual forests of div... their real-world counterparts. This model of the ocean is the first to reflect the vast diversity of the invisible forests living in our oceans-tiny, singl...

Corals that can fight global warming may one day help fragile reefs

...nd East Africa that seeks to understand how rising ocean temperatures (which are monitored with high-resolution satellite detectors) are related to lethal coral reef epidemics. The warm temperatures that have been occurring worldwide as a result of global warming appear to be facilitating fatal epidemics...

Tracking sperm whales and jumbo squid

... also called the Sea of Cortez—a narrow stretch of ocean that separates the Mexican mainland from the Baja Peninsula. "The central Gulf of California is a uniquely advantageous location to study the behavioral ecology of sperm whales and their squid prey," the authors wrote. "Sperm whales are abundant y...

Scientists uncover link between ocean's chemical processes and microscopic floating plants

...cientists have discovered that increased levels of ocean acidity and carbon dioxide concentrations have res...ated present-day carbon dioxide concentrations and ocean acidity, and carbon dioxide levels expected at the end of this century and the middle of the next on...

UTSA researchers examine effects of global warming on Antarctic

...and temperature and salinity measurements into the ocean depths. Now with one trip to the Antarctic under their belt, Xie and Cicek are enlisting the help of world-renowned sea ice expert Stephen Ackley to assist in the analysis of the data in UTSA's Laboratory for Remote Sensing and Geoinformatics. ...

Are we killing the world's oceans?

How will global warming affect ocean circulation and sea levels in the centuries to com...he US will speak on such issues as climate change, ocean acidification and coral reefs, the increase in ocean dead zones, scientific and social dynamics duri...

Shedding new light on proteorhodopsin

...d oxygen deprivation probably explains why so many ocean bacteria express proteorhodopsin." Liphardt said that the solar power option represents a potentially significant boost for efforts to develop alternatives to fossil fuel energy sources. Microbes that can simultaneously harvest energy from several...

ESA launches new project to protect biodiversity

...l corridor change detection maps; coral reef maps; ocean water quality monitoring services; and mangrove maps. The projects will also investigate wildlife migration processes from the Galapagos Islands to Cocos Island. Finally, the project will provide a global map of dry lands based on existing global dat...

Darwin's famous finches and Venter's marine microbes

...t certain protein profiles are more popular in the ocean or on land. For example, gram-positive bacteria ar... Susan S. Taylor, Ph.D., traded the breadth of the ocean survey for the depth of a single protein domain. They zoomed in on kinases, extremely well studied e...

New findings blow a decade of assumptions out of the water

...tion or denitrification ?if climate change altered ocean temperatures and the rates of the two processes, f...the literature as to whether fixed nitrogen in the ocean remains constant with time or fluctuates widely," says Jorge Sarmiento, professor of geosciences at ...

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