Quantcast

Latest Herbivore Stories

b61a1775add0aa40d62290aaa8f578811
2010-08-26 23:34:48

The dilemma for tobacco hornworm larvae: By feeding on tobacco leaves they unintentionally and rapidly transform plant substances into attractant signals that betray their location to their own natural enemies -- with lethal consequencesPlants have developed a sophisticated defense system. They can not only directly fend off herbivores by producing toxins, but also do so indirectly by emitting odorant molecules into the atmosphere that are perceived by predatory insects; these predators are...

2010-08-09 17:42:35

When plant-eating mammals such as goats chomp on a sprig of alfalfa, they could easily gobble up some extra protein in the form of insects that happen to get in their way. But a new report in the August 10th issue of Current Biology, a Cell Press publication, shows that plant-dwelling pea aphids have a strategy designed to help them avoid that dismal fate: The insects sense mammalian breath and simply drop to the ground. "Tiny insects like aphids are not helpless when facing large animals...

2010-03-26 09:10:21

Forget top-to-bottom only. New Cornell University evolutionary biology research shows how plants at the bottom of the food chain have evolved mechanisms that influence ecosystem dynamics as well. (Science, March 26, 2010.) "The ecology and interactions of most organisms is dictated by their evolutionary history," said Anurag Agrawal, associate professor of ecology and evolutionary biology (EEB), the study's senior author. In food webs, predators help suppress populations of prey by eating...

2010-03-26 08:34:47

Findings could be useful in development of pest-resistant crops There's a war occurring each day in our backyards "“ plant versus plant-eating insect versus insect-eating insect. Research by UC Irvine's Kailen Mooney suggests the outcome "“ of interest to farmers "“ is a stalemate. For a study published online Friday, March 26, in the journal Science, Mooney and colleagues studied 16 species of milkweed, a group of flowering plants found throughout the Western hemisphere....

a2fda59734310f5d2dcef8d8c75df831
2010-03-10 07:31:48

Mechanism for associational resistance confirms Nordic and Canadian folklore Scandinavian scientists have discovered that a species of tree defends itself from herbivore attack by using chemicals emitted by neighboring plants. The study, published March 9 in New Phytologist, reveals how a species of birch tree adsorbs chemical compounds from neighboring marsh tea plants, Rhondodendron tomentosum, in a unique 'defense by neighbor strategy.' The team from Finland, led by Prof. Jarmo Holopainen...

029df237a2985499c7b46e1fdc9077a61
2010-02-24 15:52:07

Scientists at UH publish breakthrough research on 163-year-old puzzle Thanks to a pair of University of Houston researchers who found a possible new solution to a 163-year-old puzzle, ecological factors can now be added to physiology to explain why animals grow bigger in the cold. Their results were published in the February issue of the American Naturalist, offering new insight to Bergmann's rule that animals grow larger at high, cold latitudes than their counterparts closer to the equator....

c025317e922ad8f7a5dc4e5057bd278f1
2010-02-11 07:05:00

On Wednesday, Kenyan gamers started to round up thousands of zebras to move to a reserve where lions are attacking livestock due to a lack of prey. The nationwide operation is due to last until the end of the month in what will go down as one of Africa's biggest animal translocations so far.  The Kenya Wildlife Service (KWS) launched the operation in Soysambu conservancy. Rangers in helicopters started rounding up galloping zebras into a large V-shaped tarpaulin enclosure after...

2010-01-28 12:17:42

New solution to 163-year old puzzle? New research suggests that animals living at high latitudes grow better than their counterparts closer to the equator because higher-latitude vegetation is more nutritious. The study, published in the February issue of The American Naturalist, presents a novel explanation for Bergmann's Rule, the observation that animals tend to be bigger at higher latitudes. Ever since Christian Bergmann made his observation about latitude and size in 1847, scientists...

2009-12-01 14:19:18

Broadly speaking, ants have two different feeding strategies. A large proportion of all species are "carnivorous," meaning that they are generalist predators feeding on other small animals or scavenging on their remains. Some, however, are "herbivorous". This is not to say that they only eat plants; rather, the bulk of their diets consist of plant-derived matter. For example, some forage on sticky fluids produced by plants to attract ants, called extra-floral nectar; others feed on the...

2c9c250c0ab6f22e25795076a0ea34321
2009-11-20 08:31:39

Roughly 15,000 years ago, at the end of the last ice age, North America's vast assemblage of large animals "” including such iconic creatures as mammoths, mastodons, camels, horses, ground sloths and giant beavers "” began their precipitous slide to extinction. And when their populations crashed, emptying a land whose diversity of large animals equaled or surpassed Africa's wildlife-rich Serengeti plains then or now, an entirely novel ecosystem emerged as broadleaved trees once...


Word of the Day
omphalos
  • The navel or umbilicus.
  • In Greek archaeology: A central boss, as on a shield, a bowl, etc.
  • A sacred stone in the temple of Apollo at Delphi, believed by the Greeks to mark the 'navel' or exact center-point of the earth.
'Omphalos' comes from the ancient Greek.
Related