Tag: "herbivore" at biology news

Parasites' impact goes beyond host to affect ecosystem

...il known as the common periwinkle and the dominant herbivore in the intertidal zone. "We wanted to find out what was this parasites impact on the community," says Byers, who advised Wood during the research, which she conducted in summer 2005 as part of the highly competitive Research Experience for Undergradu...

Can a taste for poison drive speciation?

...t the rules of co-evolutionary war suggest that an herbivore will evolve resistance to the toxic defenses of pl...romote specialized ecological interactions between herbivore and plant host sufficient to drive herbivore speciation? In a new study, published by PLoS Bioogy...

Batfish to the rescue!

...itment." Batfishes may be one of the last intact herbivore populations capable of reversing serious weed overgrowth of inshore coral reefs, he adds. The reef has already all-but lost one major group of weed-mowers, the dugongs, while another green turtles is seriously endangered. "If Platax is the last g...

Why do insects like to eat some plants more than others?

...l of the University of Nebraska, Lincoln) examined herbivore dynamics, specifically why plants aren't all eaten at the same rate. Plant-insect ecologists typically attribute the differences to variation in the nutritional quality or defective chemistry of plant tissues. However, the researchers found that cact...

After insects attack, plants bunker sugars for later regrowth

...e discovered the first gene mediating tolerance to herbivore attack: GAL83, the beta-subunit of Nicotiana atten...bacco hornworm, Manduca sexta, elicitors from this herbivore TM s mouth (called FACs - fatty acid conjugates), which also tune the plant TM s induced defence res...

Tyrannosaur survivorship -- tough times for teens

...ous, or pack, animals. The almost complete lack of herbivore bones from the excavation suggests that this was probably not a predator trap. Recognizing the importance of the site, Currie led an expedition in 1997 to try to find Brown's original quarry and returned annually with a group from the Royal Tyrrell M...

Plants tell caterpillars when it's safe to forage

...ayashi show that plant signals can indeed regulate herbivore behavior. When the larvae of beet armyworms ( Spodoptera exigua ) feed on corn, the plant releases volatile compounds that act as a magnet for parasitic wasps ( Cotesia marginiventris ), which deposit their eggs in the larvae. Production of volatile ...

Invasive exotic plants helped by natural enemies

...d Parker. He also noted that this radical shift in herbivore composition may favor exotic plants over natives. Recent research, including a paper authored by Parker in Ecology Letters last year, suggests that native herbivores actually prefer to eat exotic plants over native plants. This research proposes that...

Scientists look to the Bahamas as a model for coral reef conservation

... chief seaweed grazer was taken over by a colorful herbivore known as the parrotfish. Parrotfish, in turn, are preyed upon by large carnivores, such as the Nassau grouper, whose numbers had increased in the park since the imposition of a fishing ban in 1986. Today, according to the Science study, Nassau groupe...

A distinguished program training the next generation of conservation scientists

...ity and ecological roles of birds as regulators of herbivore outbreaks. Laurel Griggs Larsen from Titusville, Florida, and the University of Colorado-Boulder (Boulder, Colorado, U.S.A.) is studying formation and maintenance of the ridge and slough landscape in Everglades National Park (Homestead, Florida). The...

Native plant eaters have gourmet palates

...e species. Our results imply that restoring native herbivore communities may be a viable option to help control exotic plant invasions." Parker is now working on determining whether native herbivores do in fact control exotic plant growth in field settings, an important step in determining whether biological c...

Four new vertebrate fossil finds in Ischigualasto, Argentina

...documented in the north." The new dinosaur was an herbivore with a long neck and four stout legs, measuring no longer than four meters long, typical of prosauropods. What makes it unique is a foreshortened skull, like many later sauropods of the Jurassic and Cretaceous. "This specimen shows the incredible div...

Multi-species herbivore outbreak follows El Nio drought in Panama

...coast. If ENSO events become more common, repeated herbivore outbreaks might alter forest species composition. ...hit some tree species harder than others, repeated herbivore outbreaks could change the species composition of the forest. In a recent volume of the Journal of ...

1

(Date:7/28/2014)... RENO Norwegian explorer Roald Amundsen became the first ... 1911. More than 100 years later, an international team ... Research Institute (DRI) have proven that air pollution from ... 16 ice cores collected from widely spaced locations around ... created the most accurate and precise reconstruction to date ...
(Date:7/27/2014)... nicotine and cotinine, a metabolite of nicotine, can potentially ... smoke. , The carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone or NNK is produced ... up in the tobacco smoke. Once inhaled, it is ... activated by a variety of enzymes called Cytochrome P450 ... can partially interfere with the activation of NNK, and ...
(Date:7/27/2014)... wiped them out if it had taken place slightly ... fresh study using up-to-date fossil records and improved analytical ... of the prehistoric creatures, demise, some 66 million years ... years before a 10km-wide asteroid struck what is now ... volcanic activity, changing sea levels and varying temperatures. ...
Breaking Biology News(10 mins):Industrial lead pollution beat explorers to the South Pole by 22 years and persists today 2Industrial lead pollution beat explorers to the South Pole by 22 years and persists today 3Nicotine found to inhibit DNA-strand break caused by a certain carcinogen in smoke 2Dinosaurs fell victim to perfect storm of events, study shows 2
Other Tags
diversitygeneratepiecespasteastrophysicistlenslessjeantetcomputationsimplicityconveniencenorovirusgastroenteritisnetworksindependentdiscoversamyloidosis