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 ...