Quantcast

Latest food web Stories

Adelies Ross Sea ice floes
2014-02-27 05:21:14

April Flowers for redOrbit.com - Your Universe Online The Ross Sea is a major, biologically productive ecosystem in the Antarctic, which "clearly will be extensively modified by future climate change" in the coming decades as longer periods of ice-free open water are created by rising temperatures and changing wind patterns. According to a new paper funded by the National Science Foundation (NSF), these ice-free periods affect the life cycles of both predators and prey. The research...

Our View On How Nature Is Structured Changed By DNA Barcodes
2014-01-21 14:11:58

University of Helsinki How you seek is what you find To understand how feeding interactions are structured, researchers from Finland and Canada chose to focus on one of the simplest food webs on Earth: the moths and butterflies of Northeast Greenland, as attacked by their specialist enemies, parasitic wasps and flies developing on their prey (called host), killing it in the process. "What we found in this system was mind-boggling", explains Helena Wirta, the lead author of the study....

Smaller Islands Have Shorter Food Chains
2013-11-22 09:07:08

University of Helsinki That smaller islands will typically sustain fewer species than large ones is a widespread pattern in nature. Now a team of researchers shows that smaller area will mean not only fewer species, but also shorter food chains. This implies that plant and animal communities on small islands may work differently from those on large ones. Top predators the first to go Working across a set of 20 islands off the Finnish coast, a group of Finnish scientists found that a...

Lessons From The Grand Canyon: Dams Destabilize River Food Webs
2013-08-20 10:22:02

Cary Institute of Ecosystem Studies Managing fish in human-altered rivers is a challenge because their food webs are sensitive to environmental disturbance. So reports a new study in the journal Ecological Monographs, based on an exhaustive three-year analysis of the Colorado River in Glen and Grand Canyons. Food webs are used to map feeding relationships. By describing the structure of these webs, scientists can predict how plants and animals living in an ecosystem will respond to...

Dragonfly Study Shows How Ecosystem Changes Affect Biodiversity
2013-08-14 07:22:29

April Flowers for redOrbit.com - Your Universe Online Rice University researchers have found that communities in nature are likely to be a lot more sensitive to change than previously thought. The study findings, published in Nature Communications, points to a need for scientists concerned with human impact on the biosphere to take a different look at the consequences of altering the dynamics of a population. One example of such alteration would be removing large members of a species...

Food Web Affected By Parasites More Than You Think
2013-06-19 10:15:07

University of California - Santa Barbara Parasites are ubiquitous. They feed on virtually every animal and even on each other. Yet, for all the parasites' collective contributions to biomass and biodiversity, conventional food webs don't account for the presence of these tiny and numerous consumers. A recent study featuring work by several UC Santa Barbara scientists focuses on the impact parasites have on food webs, with findings that are expected to alter our picture of who-eats-who. The...

2013-06-12 13:19:59

Parasites comprise a large proportion of the diversity of species in every ecosystem. Despite this, they are rarely included in analyses or models of food webs. If parasites play different roles from other predators and prey, however, their inclusion could fundamentally alter our understanding of how food webs are organized. In a paper published 11 June in the open access journal PLOS Biology, Santa Fe Institute Professor Jennifer Dunne and her team test this assertion and show that including...

Researchers Use Pitcher Plants To Identify Signs Of Trouble Dead Ahead
2013-04-24 12:13:10

National Science Foundation In one drop of water are found all the secrets of all the oceans. --- Kahlil Gibran What do a pond or a lake and a carnivorous pitcher plant have in common? The water-filled pool within a pitcher plant, it turns out, is a tiny ecosystem whose inner workings are similar to those of a full-scale water body. Whether small carnivorous plant or huge lake, both are subject to the same ecological "tipping points," of concern on Earth Day--and every day, say...

Carnivorous Pitcher Plants Play Host To Complex Food Web
2013-04-03 09:00:17

Brett Smith for redOrbit.com - Your Universe Online At first glance, pitcher plants appear to be simple carnivorous plants that entrap and digest hapless insects that fall into them. However, a closer look reveals a complex food web of fly larvae, rotifers, midge larvae, and bacteria that exist within the plants´ pitcher. According to a new study by Harvard University, the predator-prey interactions among pitcher plant inhabitants provide an ideal model for understanding food webs...

Cretaceous Extinction Worsened By Ecosystem Structures
2012-10-30 04:17:18

April Flowers for redOrbit.com - Your Universe Online A mass extinction, wiping out numerous species including the dinosaurs, marked the end of the Cretaceous Period. A new study, published in Proceedings of the National Academy of Sciences (PNAS), reveals that the structure of North American ecosystems made the extinction worse than it might have been. Mexico's Yucatan Peninsula is home to the now-buried Chicxulub impact crater, caused by a mountain-sized asteroid. This impact is...


Word of the Day
lunula
  • A small crescent-shaped structure or marking, especially the white area at the base of a fingernail that resembles a half-moon.
This word is a diminutive of the Latin 'luna,' moon.
Related