Sentences with phrase «says plant ecologist»

The sand patches, each about 300 meters wide, used to occur in many more areas of Brazil's mountain savannah, says plant ecologist Rafael Oliveira of the University of Campinas in São Paulo, Brazil.

The biggest timber salvage operation in U.S. history was launched in the northeast U.S. after «The Great Hurricane of 1938,» says plant ecologist David Foster, director of the Harvard Forest, a 3000 - acre tract in Petersham, Massachusetts.

Not exact matches

«In these environments that are dominated by marine plants, photosynthesis and respiration cause large differences in CO2 concentrations and the addition of anthropogenic carbon make these day - to - night differences even larger than they would be without that extra carbon,» said George Waldbusser, an Oregon State marine ecologist and co-author on the study, who serves as Pacella's Ph.D. adviser.

It's usually a mosaic of plant and fungal tissues,» says evolutionary ecologist Allen Herre.

All of the benefits and drawbacks to gene drives are «just so hypothetical right now,» says Allison Snow, a plant population ecologist at Ohio State University.

But it is unclear how much residual radioactive contamination is still entering the sea from leaks around the Fukushima plant, says Scott Fowler, a marine ecologist at Stony Brook University in New York who has been involved in previous assessments of contamination levels in the ocean near Fukushima.

Ecologists have long known that drought can stimulate this type of attack on plants, he said, but they mostly discounted it as a secondary stress and not a main cause of ecosystem collapse.

Today, much of the abandoned farmland where second - generation bioenergy crops could grow is degraded and dominated by invasive plants, says Phil Robertson, an ecologist at Michigan State University's W. K. Kellogg Biological Station in Hickory Corners.

SAVANNAH, GEORGIA — The glut of humanmade carbon dioxide (CO2) that is spurring global warming may have an unwelcome side effect for hay fever sufferers: It could help ragweed flourish and crowd out other plants, ecologists say.

But the new study strongly supports the idea that plants play an important role in triggering the rainy season, says Scott Saleska, an ecologist at the University of Arizona in Tucson, who was not involved with the work.

The easiest way to keep cheatgrass from out - competing the native plants after a fire, says Dave Pyke, a rangeland research ecologist for the U.S. Geological Service, is to spread sugar on the charred ground.

Plant ecologist Gian - Reto Walther of the University of Bayreuth in Germany says it is unclear what this finding bodes for the broader ecosystem.

Plants and animals will not dwindle away slowly, say mathematical ecologist Martin Hoyle and biologist Mike James, formerly of the University of Nottingham in England.

«These are direct pipelines from plant to plant, like a telephone wire,» says Suzanne Simard, a forest ecologist at the University of British Columbia who studies mycorrhizal networks.

This behavior is essential to the well - being of plants, as the journey through the gut seems to be a rite of passage necessary for some seeds to germinate, says Kevin Burns, an ecologist at Victoria University of Wellington, New Zealand.

That's a little worrisome, says Milena Holmgren, a plant ecologist at Wageningen University and Research Centre in the Netherlands, who was not involved in the research.

The findings track with the growing body of research on the impact of insects on forest fire severity, said Carolyn Sieg, a research plant ecologist with the U.S. Forest Service.

The paper is «solid, exciting research,» says ecologist Chris Field of Carnegie Institution for Science in Palo Alto, California, who notes that various models have looked at ways different factors might affect future plant growth.

«Everybody expects to hear a disaster story when we say that,» said Daniel Potts, a plant physiological ecologist and associate professor of biology at Buffalo State.

«Where reforestation is happening — either through planting of trees or through encroachmen t — these lands are actively adding carbon to a large pool that will continue to grow for many decades,» said U-M ecologist and biogeochemist Luke Nave, the study's lead author.

«Alien plants often gain advantages in their new environment because they lack natural enemies, and in this case the lack of strong competitors amongst alpine plants may be the key to success for generalist native species,» says ecologist Ann Milbau, assistant professor at the research station Climate Impacts Research Centre in Abisko, Sweden.

Nevertheless, «In Spain, it is common practice for researchers to work alone in the field,» says Pedro Rey, a plant ecologist from the University of Jaén, «because we do not usually get public funds for a field assistant.»

«Plant breeding and cultivation methods should therefore be geared towards mixtures instead of improving the output of monocultures,» says the ecologist from UZH.

Brown University ecologist Marc Tatar says the current study, published in this week's Science, provides «really profound evidence» that longevity is controlled not by actual resources but rather by hormones that are cued to resources (such as the way plants sense winter by sunlight changes).

In fact, says Helliker, infrared imaging of trees has already shown that their leaves can be warmer than the surrounding air by several degrees, as was reported last year by Christian Körner, a plant ecologist at the University of Basel in Switzerland.

The government is counting its chickens before they are hatched, says Fernando Valladares, a plant ecologist at the National Museum of Natural Sciences in Madrid who is president of the Spanish Association for Terrestrial Ecology and who, with other scientists, critically analyzed the draft strategy.

Like thousands of organisms that live off imperiled plants and animals, the sucking louse is missing from many endangered species lists — and that, says evolutionary ecologist Rob Colwell of the University of Connecticut at Storrs, is an unfortunate oversight.

«Ecologists generally assume that plants high in nitrogen will facilitate insect outbreaks,» says Fiona Clissold, a nutritional physiological ecologist at the University of Sydney in Australia.

Plant ecologists have known that the form and function of leaves are essential to a plant species» success, but «we did not understand if this was true across the tremendous diversity of plant root systems,» he Plant ecologists have known that the form and function of leaves are essential to a plant species» success, but «we did not understand if this was true across the tremendous diversity of plant root systems,» he plant species» success, but «we did not understand if this was true across the tremendous diversity of plant root systems,» he plant root systems,» he said.

The problem is that plants with good possibilities often have the same traits that make then potentially invasive species, said Lauren Quinn, an invasive plant ecologist at the University of Illinois» Energy Biosciences Institute.

«This is the first paper that really makes a link between lower plant quality and enhanced performance,» says Spencer Behmer, a physiological ecologist at Texas A&M University in College Station, who was not part of the study.

Human actions could also have created conditions that favoured domesticated plants over their wild brethren, says Mark Bush, an ecologist at the Florida Institute of Technology in Melbourne.

For instance, «plants that like their pollinators to be pretty loyal» could see declines in reproduction, says ecologist Laura Burkle of Montana State University, Bozeman.

The researchers are also collecting information about weather patterns and other socio - ecological conditions that affect maple trees, said Rapp, a plant ecologist.

But in opening the door to the plant's cultivation, far more scrutiny is needed as to how eucalyptus will behave when grown in bulk, said Doria Gordon, a senior ecologist at the Nature Conservancy.

«Previous studies at a few sites had shown that large trees suffer more than small trees during and after droughts, and our theory suggested this should be a globally consistent pattern, but this project was the first to test this hypothesis globally,» said Los Alamos National Laboratory's Nate McDowell, a renowned forest ecologist and plant physiologist who coauthored a paper in the journal Nature Plants highlighting this research.

«The idea that changes in plant chemistry and therefore plant resistance may change the probability of cannibalism is very original,» says Andre Kessler, a chemical ecologist at Cornell University in Ithaca, New York, who did not participate in the study.

«We've known for a long time that herbivores do eat other insects, but so far people studying herbivory have kind of ignored that because it's a lot easier to put herbivores in a neat bin in which they only eat plants,» says Michigan State University ecologist William Wetzel, who did not participate in the study.

«There's not a simple story,» John Silander, a plant ecologist at the University of Connecticut, said.

As my sister, Judy Parrish, a botanist and ecologist, says, one of the most important things that we can do for our planet is plant trees, and certainly to stop cutting them!

Many previous predictions of animal and plant extinction due to climate change have not taken the effects of movement and competition into account, say US ecologists.

Dr. Skip Walker, a plant ecologist at the Institute of Arctic and Alpine Research at the University of Colorado in Boulder, said the study was «the first real evidence that this kind of movement may occur,» adding, «People have been suspecting it's been happening without being able to show it.»