Sentences with phrase «plant populations»

Previous attempts to predict such range shifts have made several simplifying assumptions leading to large uncertainties about the impending loss of mountain plant populations.
These activities can affect native plant populations and wildlife.
All factors, except for plant population, were necessary for maximizing yield and reducing the yield gap.
So how much gene flow is there between plant populations?
And in the tropics, hunting and habitat degradation are the major drivers in animal and plant population changes.
The fragments were all thought to be able to grow into new plants hence indicating that they could be used to establish new plant populations.
Another method is by deploying resistant genes in mixed plant populations.
Much of the time marine biologists spend in the field is focused around gathering data through observing plant populations and wildlife interactions that take place in the sea.
The goal was to learn whether global warming would accelerate the dispersal of plant populations in forests.
But Glaum and Kessler reached a different conclusion when they included herbivore - induced pollinator limitation (HIPL) in their model, which allowed them to examine broader, more indirect effects of herbivory on plant population persistence and community dynamics.
Although it was first seen in the 1940s to be the evolutionary glue that held species together, and thus a significant evolutionary force, a few decades later when quantitative data on gene flow in plant populations began being collected, this view changed as evidence seemed to indicate that gene flow was not all that significant.
Now, researchers at Portland State University have developed a new technique to sequence chloroplast DNA from hundreds of plants at once, to learn more about how plant populations move.
Corn hybrids with improved tolerance to crowding stress, grown at higher plant populations than their predecessors, have been a driver of rising field corn yields in recent decades.
Carnivorous predators play an important, and until now unknown, role in preserving plant populations in the territories they inhabit.
Wind, sun and rain have sculpted vistas of unsurpassed beauty in which some of the earth's most diverse plant population thrive.
By supporting important seed dispersal processes, shade coffee farms maintain plant population gene flow across fragmented habitats.»
If wild gathered material is collected, each worker must complete a «wild take audit» to ensure that our treasurable plant populations have only undergone a sustainable 10 % take.
Many flowers in nature have evolved to attract animals to pollinate the flower, the movements of the pollinating agent contributing to the opportunity for genetic recombination within a dispersed plant population.
By using an intensified management system that included increased plant population, transgenic (Bt trait) insect resistance, strobilurin - containing fungicide, balanced crop nutrition (phosphorus - sulfur - zinc), and supplemental side - dressed nitrogen, the researchers saw a yield increase of 28 percent more corn grain compared to that of a standard management system.
It doesn't stop there: When plant populations get hammered, the effect ricochets up the food chain.
This information has a variety of implications for corn breeding as well as management practices like plant population
In their paper, they highlighted the need for more monitoring and enforcement, as well as research to better understand the impact of trade on wild plant populations and the actors involved in illegal trade.
Synthetic incompatibility has applications in controlling or eradicating invasive species, crop pests and disease - carrying insects as well as preventing altered genes from escaping from genetically modified crops into other plant populations.
In the early stages of plant regeneration, plants benefit from the interaction with animals: bees pollinate flowers and maintain gene flow among plant populations, while birds disperse seeds that can establish as seedlings at new locations.
Schemske and Jon Agren (Uppsala University, Sweden) led the 5 - year study that focused on Arabidopsis plant populations in Sweden and Italy.
As it turns out, despite the initial skepticism about the importance of gene flow, modern empirical and theoretical research using up - to - date molecular and DNA techniques have shown us not only how surprisingly far the flow of genes between distant plant populations can be, but also that the flow of alleles among populations is just as important, if not more so in some cases, as natural selection.
Drones can amass vegetation data over seasons or years for monitoring habitat restoration efforts, monitoring rare and threatened plant populations, surveying agriculture, and measuring carbon storage.
«We hope that other scientists will use these data to answer questions such as why, unlike humans, some plants do not deteriorate as they age, why some environments are better for agriculture than others, and how fast plant populations will move in response to climate change,» said Yvonne Buckley, professor of Zoology in Trinity College Dublin's School of Natural Sciences.
There are additionally benefits of optimal plant populations meeting the requirements (e.g. food, medicinal, and material) in human populated areas.
A group called Working Dogs for Conservation, use canines to sniff out animal and plant populations so researchers can monitor and preserve them — an eco-variation on drug - and bomb - sniffing dogs.
«These results warn against drawing over-optimistic conclusions from the relatively modest loss of mountain plant populations likely to be observed during the coming decades», says Stefan Dullinger from the University of Vienna, «because the final consequences of climate warming on plant distribution in the Alps will only become realized with a delay of decades or even centuries.»
Would animal and plant populations become fixed in place, neither advancing northwards, nor shrinking southwards, neither expanding nor dwindling?
On the basis of these results, it seems that global warming accelerates the spread of plants, but it will not alone be sufficient to help plant populations to relocate to new vegetation zones.
According to one recent study, «These changes in stress tolerance are likely the by - product of plant breeders selecting for yield at high plant populations and over a wide range of growing environments.»
We have strict criteria that our wild harvesters must adhere to in order to preserve plant populations and other harvest protocols.
Evidently, he was also aware of the diverse plant population and like us was there for lunch.
Cattle ranching, agriculture and other human activities are breaking up Costa Rican forests into isolated patchy fragments, but causing more problems for native plant populations than for monkey species sharing the same habitat.
As a result, it is imperative that we understand how plant populations are responding to climate constraints now, and use that information to predict how they are likely to respond to climatic changes in the future.»
FEARS that bird extinction could have devastating effects on plant populations are being realised.
Seed predation is an important ecological process that can affect the reproductive success of individual plants, the dynamics of plant populations, and the evolution of defensive dispersal mechanisms and plant morphological traits.
A 2014 University of Arizona study of fossilized leaves in North Dakota showed a surprising shift in plant populations.
Recent demand and consumption of ramps has increased dramatically due to their new culinary cache creating threats to plant populations and disturbance to the forests in which they reside.
Gerken, Hahn, and Morgan say identifying the genes involved in acclimation to temperature and the genetic relationship between long - term and short - term acclimation provides us with new tools to predict the impacts of an increased frequency of extreme events as a by - product of anthropogenic climate change on animal and plant populations.
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.
During the 2 to 3 million years that followed, many scientists agree, both the environment and the animal and plant populations of the region remained stable.
The design of the study, an incomplete factorial design commonly referred to as an addition / omission study, entailed applying each of the five management factors (plant population, transgenic trait, fungicide, nitrogen fertility, and phosphorus - sulfur - zinc fertility) at two levels (traditional and advanced).
a b c d e f g h i j k l m n o p q r s t u v w x y z