Sentences with phrase «marine food web»

They found that plankton, the basis of marine food webs, might react to warming in a predictable way.

But that doesn't mean that the consequences don't exist, from changes in marine food webs to shifts in oceanic and atmospheric chemical composition.

«This can help us determine mechanisms that influence species composition in planktonic communities exposed to red tides, and suggests that these chemical cues could alter large - scale ecosystem phenomena, such as the funneling of material and energy through marine food webs.»

In addition to altering marine food webs, iron fertilization could produce greenhouse gases more potent than carbon dioxide, such as nitrous oxide and methane, or block sunlight needed by deep coral reefs.

The researchers constructed marine food webs based on plants which use sunlight and nutrients to grow (algae), small invertebrates that graze on the plants (such as shrimp), and fish that in turn prey on small invertebrates.

For instance, they churn up ocean sediments and release nutrients that fuel the entire marine food web.

But in the world of marine microbial ecology, there are very few model systems and associated tools that enable scientists to deeply explore the physiology, biochemistry, and ecology of marine microbes, which drive the ocean's elemental cycles, influence greenhouse gas levels, and support marine food webs.

Oceanic uptake of anthropogenic carbon dioxide (CO2) causes pronounced shifts in marine carbonate chemistry and a decrease in seawater pH. Increasing evidence indicates that these changes — summarized by the term ocean acidification (OA)-- can significantly affect marine food webs and biogeochemical cycles.

Dr. Wood approached this question using fished marine food webs as model systems.

When pesticides are incorporated into the marine ecosystem, they quickly become absorbed into marine food webs.

«So the contamination of long - lived radionuclides in different organisms in the local marine food webs needs to be monitored continually.»

Determining how such departures and arrivals influence complicated marine food webs will be difficult work, she says, involving laborious field surveys and careful counts of jellyfish stomach contents.

Global warming is increasing ocean temperatures and harming marine food webs.

That's the conclusion of a new study, which finds that rebounding populations of baleen and sperm whales may be boosting marine food webs around the world.

Unicellular photosynthetic microbes — phytoplankton — are responsible for virtually all oceanic primary production, which fuels marine food webs and plays a fundamental role in the global carbon cycle.

Reduced ability to maintain a protective shell among free - swimming zooplankton (zooplankton include «animal plankton», mainly small crustaceans and fish larvae, and form the base of most marine food webs)

Plus this toxic soup disturbs marine food webs and ecosystems.

This «kelp highway hypothesis» suggested that highly productive kelp forests supported rich and diverse marine food webs in nearshore waters, including many types of fish, shellfish, birds, marine mammals, and seaweeds that were similar from Japan to California, Erlandson and his colleagues also argued that coastal kelp forests reduced wave energy and provided a linear dispersal corridor entirely at sea level, with few obstacles to maritime peoples.

As the oceans become more acidic thanks to greenhouse gas emissions, box jellyfish will eat far more copepods — the foundations of marine food webs

In these shifting waters, marine microbes called Trichodesmium could falter in adding nitrogen, a critical input for marine food webs, says Dalin Shi of Xiamen University in China.

Haddock thinks the importance of jellyfish in marine food webs has been unappreciated and underestimated.

Phytoplankton are the dominant plants in the sea, and are the basis of the entire marine food web.

Over 150 marine scientists from 26 countries signed the Monaco Declaration warning that «ocean acidification could affect marine food webs and lead to substantial changes in commercial fish stocks, threatening protein supply and food security for millions of people as well as the multi-billion dollar fishing industry.»

Schematic representation of the Canadian arctic marine food web, with a transition from coastal to oceanic ecosystem (left to right)

Scientists in B.C. and the U.S. have several questions they are pursuing - the pyrosome's feeding behavior, the environmental variables the affect their numbers and the impact on the marine food web.

Their return tells a bigger environmental success story: federal and state regulations stretching back 40 years have curtailed pollution and repaired the marine food web that includes white sharks (formerly called great white sharks).

«I was aware of research arguing that the use of the marine food web had played a significant role in brain evolution, and expansion, through the supply of omega - 3 fatty acids,» Duarte says via email while traveling.

The goal is a better appreciation of the huge role that jellies play in the marine food web, as well as a more complete inventory of how carbon (fundamental to both life and climate) is distributed in the ocean.

The polar bear is a semi-aquatic marine mammal that depends mainly upon the pack ice and the marine food web for survival.

Researchers find trouble among phytoplankton, the base of the food chain, which has implications for the marine food web and the world's carbon cycle

The researchers looked specifically at the average fishing revenue in 106 Alaskan communities for 10 years before and after 1989, a year when the North Pacific Ocean experienced a significant shift in productivity and abrupt changes in the composition of marine food webs, while at the same time the global price for salmon dropped because of competition from farm - raised fish.

University of Adelaide researchers have constructed a marine food web to show how climate change could affect our future fish supplies and marine biodiversity.

In the largest study of its kind, the group has monitored the reaction of species at the base of the marine food web — viruses, bacteria, microscopic plants called phytoplankton, and their animal counterparts, zooplankton — to various degrees of acidity.

«We know how important phytoplankton are for the marine food web, and we're trying to understand their role as a carbon pump,» Uz said.

«There's a lot of starvation that happens to the marine food web.»

Thus, past and future increases in atmospheric nitrogen deposition have the potential to alter the base of the marine food web; and, in the long term, the structure of the ecosystem.

They also form the foundation of marine food webs, including those that support global ocean fisheries.

Plankton species, the foundation of the marine food web, have shifted back slightly toward fat - rich, cool - water species that improve the growth and survival of salmon and other fish.

The shells of marine snails known as pteropods, an important link in the marine food web, are already dissolving.

«While the changing seascape has dramatically altered and increased the diversity and number of small creatures at the base of the marine food web, we still don't know how these changes in the ecosystem will propagate through the entire chain.

Phytoplankton and bacteria form the base of the marine food web.

Unusually warm ocean conditions have led to species shift along the West Coast, which continue reverberating through the marine food web.

In addition to changes in the penguin populations, Palmer Station researchers track changes in sea ice and the marine food web, and pioneered the use of underwater gliders to explore below the Antarctic waters.

The marine food web is not just defined by the immediate «eat and be eaten» — the exchange of organic nutrients and vital functions is equally crucial.

Pauly has documented a persistent pattern of fishing down the marine food web: after prized top predators are hunted out, fishermen turn to increasingly smaller prey, depleting coastlines of marine life.

Applications are invited to the following two postdoctoral positions based at the University of British Columbia within the Marine Food Webs Working Group of the Hakai Coastal Initiative.