Sentences with phrase «food webs at»

Five vignettes, illustrated in realistic and detailed paintings, give eloquent descriptions of food webs at various times of day.

The food webs at the time could remain stable if they were dominated by large amniotes and lacked smaller ones, but not the other way around.

The researchers looked at the nitrogen stable isotope composition of different members of the food web at suburban ponds.

This would put the whole oceanic food web at risk.

Food web at risk due to loss of snow cover — key prey species such as lemmings and voles overwinter in snow tunnels.

Not exact matches

But the junior editors here at the journal — who were fed bits and bytes with their baby food — insist that I mention it, as it is apparently the Internet address for our new First Things web site.

«Green foods are the problem children of the wine world,» says Natalie MacLean, editor of one of the largest wine sites on the web at www.nataliemaclean.com.

At AFM she oversees all things digital, keeping the company on the cutting edge of the Web across the organization's four business segments: general market, multicultural, retail, and food service.

He is the host of the National Geographic web series Cook-Wise and the director of the healthy and sustainable food program at the Center for Health and Global Environment at Harvard.

The development of productive wetland ecosystems capable of supporting diverse food webs, including algae and microinvertebrates, which support biota at higher trophic levels such as fish and waterbirds.

Check out these #SensationalSides from our friends at the Food Network and around the web!

Pure Food Company may make changes to the materials contained on its web site at any time without notice.

They have since returned to Germany to lead the fiery - foods revolution there with their German language web shop at www.pepperworld.com.

Krispy Kreme's Halloween sprinkled, spider web and jack - o - lantern shaped doughnuts are available for a limited time only at all locations around the Las Vegas Valley: Castle Walk Food Court inside the Excalibur Hotel & Casino, Circus Circus Las Vegas, Craig Road, Rainbow Springs and Silverado Ranch.

They include lists of «store bought» (aka processed) foods that they're willing to recommend such as Nature Valley cereals, Amy's cheese enchiladas, R.W. Knudsen's juice concentrates, which are posted helpfully at their Web site realfoodforhealthykids.

The birds» feathers and eggshells contain the chemical fingerprints of variations in diet, food web structure and even climate, researchers reported February 12 at the American Geophysical Union's 2018 Ocean Sciences Meeting.

For their study, Weiss and her team also documented the impacts of higher CO2 levels on freshwater crustaceans at the bottom of the food web — specifically, two species of Daphnia, also known as water fleas.

In places where sea - floor oxygen levels are a bit higher — about 0.5 — 3 % of concentrations at the sea surface — animals are more abundant but their food webs remain limited: the animals still feed on microbes rather than on each other.

«Under climate change, the Pacific Islands region is projected to become warmer, less oxygenated, more acidic, and have lower production of plankton that form the base of oceanic food webs,» said lead author Rebecca Asch, Nereus Program alumnus and Assistant Professor at East Carolina University.

Similar «sustainable,» «fair trade» and «organic» bouquets are increasingly available at the mega-retailer Sam's Club, natural food stores, FTD - certified shops and Web sites such as Flowerbud, OrganicBouquet, 1 -800-Flowers and TransFair.

The miniature crustaceans are at the bottom of many freshwater food webs.

The researchers removed one species of wasp and found that it led to secondary extinctions of other, indirectly linked, species at the same level of the food web.

Because large animals play an important role in the ocean food web, «a threat profile focused on the largest species is particularly concerning from an ecological perspective,» said lead author Jonathan Payne, an associate professor in the school of Earth, Energy and Environmental Sciences at Stanford.

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.

The researchers warn that removing marine animals at the top of the food web could significantly disrupt the ocean's overall ecology for potentially millions of years, which is why effective management strategies will be critical.

Repeated pulses of volcanism at the end of the Permian may have led to several periods of irradiation that sterilized the forests, causing a catastrophic breakdown of food webs, the researchers say — an indirect but effective way to kill.

At these locations, the flood didn't cause major changes in the structure of food webs or the productivity of species.»

A study published in Environmental Toxicology and Chemistry used American dippers to determine if run - of - river (RoR) dams altered food webs and mercury levels at 13 stream sites in British Columbia.

The extra mercury could reverberate up the food web to fish that humans eat, warns study coauthor Erik Björn, a biogeochemist at Umeå University in Sweden.

Temperature - driven changes in the food web mean fish may lack food at this critical time, forcing them to fatten up for longer before reproducing.

Clearly, what is happening at the base of the food web reverberates up to the top of the food web.»

Dr. Robert Hall, an ecologist at the University of Wyoming, notes, «While downstream food webs proved to be more stable in our study, they are clearly a shadow of pre-dam conditions.

Steve: Some of the content of the single topic food issue is available free at our Web site, www.SciAm.com

Thomas cited wildlife studies in Minnesota and Europe showing that animals at the top of food webs had lower concentrations than animals at the bottom.

And at high global latitudes, cold lakes normally covered by ice in the winter are seeing less ice year after year — a change that could affect all parts of the food web, from algae to freshwater seals.

«Oceans in the future may provide less fish and shellfish for us to eat, and larger animals that are at the top of the food web, in particular, will suffer.

Krzysztof Zawierucha, a biologist at Poland's Adam Mickiewicz University in Pozna, is among the scientists exploring the food web within a melt hole.

«This paper is significant because it identifies a link between ocean conditions and the magnitude of the toxic bloom in 2015 that resulted in the highest levels of domoic acid contamination in the food web ever recorded for many species,» said co-author Kathi Lefebvre, a marine biologist at NOAA's Northwest Fisheries Science Center.

Nutrients help sustain phytoplankton and zooplankton, the tiny aquatic plants and animals at the base of the food web that support other aquatic life, including prey fishes.

A large number of chemicals that dissolve relatively easily in water do not break down as readily in air, building up «specifically in nonaquatic food webs: mammals, birds, human beings,» explains Frank Gobas, an environmental toxicologist at Simon Fraser University in British Columbia, who led the research.

At the same time, they may also have other impacts on the food web that have yet to be measured, including possibly competing with typical winter - spawning fishes for food.

The selective extinction of large - bodied animals could have serious consequences for the health of marine ecosystems, the scientists say, because they tend to be at the tops of food webs and their movements through the water column and the seafloor help cycle nutrients through the oceans.

News release from the University of Wisconsin Richard Atkinson Ways toWin at Weight Loss from the Food and Drug Administration Obesity web links from the Mining Company

«These are like food webs in the sky,» says Jason Chapman, an ecologist at the University of Exeter.

If that's the case, «there is potential for this plastic to enter the global ocean food web,» says Carlos Duarte, an oceanographer at the University of Western Australia, Crawley.

At the same time, climate change is likely to alter food webs and patterns of mercury transport in places such as the Arctic, which will further complicate efforts to keep the contaminant out of people and their food.

Phosphorus is an essential nutrient that feeds plankton at the base of the ocean food web.

A somewhat different look at the nation's food deserts is available through the USDA's Food Desert Locator Web sfood deserts is available through the USDA's Food Desert Locator Web sFood Desert Locator Web site.

Now researchers at MIT and Bristol University in the United Kingdom have found that these microscopic, mixotrophic organisms may have a large impact on the ocean's food web and the global carbon cycle.

Atlantic menhaden (Brevoortia tyrannus) are small fish in the herring family, which filter - feed on phytoplankton and live at the base of the food web.