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Tag: "ecosystem" at biology news

The insect vector always bites twice

...as emerging or re-emerging diseases, are linked to ecosystem changes, climatic variations or pressure from human activities. Malaria, sleeping sickness and so on lead to the death of millions of people in the world. African countries are particularly strongly hit. The expansion of Dengue fever and the recent e...

Prey not hard-wired to fear predators

...rs in ways that are important for conservation and ecosystem integrity. These findings come at a time when, after more than $23 million was spent to re-establish wolves in the northern Rocky Mountains, the animals are to be down-listed from federal protection. The states of Wyoming and Idaho have already...

Ecology in an era of globalization

...ional Autónoma de Mexico, Morelia, Mexico) analyze ecosystem services, especially those providing food, fiber, and timber. They discuss the challenges ahead in sustaining these services. Exploring the role of invasive organisms, Laura Meyerson (University of Rhode Island, US) and Harold Mooney (Stanford Un...

Scientists discover rare 'gene-for-gene' interaction that helps bacteria kill their host

... "Insects are the major players in almost every ecosystem on the planet, so we need to know as much as we can about them." ...

DOE JGI sets 'gold standard' for metagenomic data analysis

...th reference isolate genomes, so that we can model ecosystem dynamics using metabolic reconstructions of metagenomic data. "However, so far all the methods that have been developed were aimed toward analyzing data coming from single, isolate genomes. In this instance, the situation is simple; we know what gen...

Fish extinctions alter critical nutrients in water, study shows

...verfishing could threaten the overall health of an ecosystem because it targets important fish species that play major roles in recycling nutrients. In fact, 20 percent of fish species accounted for more than half of all the recycled nutrients in the ecosystems studied, the computer simulations found. "The l...

Paper challenges 1491 Amazonian population theories

...clearcutting rainforests. Their argument, that the ecosystem already experienced vast landscape disturbance and proved resilient, relies on the ubiquitous influence of Pre-Columbian people, the suggestion that Bush’s work rejects. "These data are directly relevant to the resilience of Amazonian conservation...

Human's ecological footprint in 2015 and Amazonia revealed

...zonia revealed: forest degradation and the loss of ecosystem goods and services in the Amazon Basin Also app...revealed changes in the Amazon rainforests and the ecosystem services they provide. The Amazon Basin is one of the world's most important bioregions, harborin...

Female Antarctic seals give cold shoulder to local males

.... Scientists conducting research to preserve this ecosystem need to know as much about their biology as possible. The behaviours that we observe will impact upon the genetic diversity of fur seal populations and may have helped them recover so successfully from near extinction only 100 years ago. This could i...

How trees manage water in arid environments

..., duration and intensity. "The semi-arid forest ecosystem adapts to the extremes in the annual cycle of water availability by its ability to remain turned on during the winter," Brown said. "Water stress, rather than temperature, is the primary control on the forest's behavior. The trees will remain signifi...

Scientists find method to pick noncompetitive animals, improve production

...s colorful fish species interacting in a simulated ecosystem at the Monterey, Calif., aquarium. "There is an.... Natural selection is nature's way of keeping the ecosystem in balance." Muir previously proved that animals living in groups and bred to be more passive sus...

Living with water scarcity -- world must act now

...lture is recognized as one of the major drivers of ecosystem degradation, causing habitat loss, drying up of ri...environment, we need to consider agriculture as an ecosystem producing multiple services for people and sustain biodiversity, and we need to protect the natural ...

Too much of a good thing? Excess nutrients or water limit biodiversity

... actually decreases the diversity of species in an ecosystem while it increases the productivity of a few speci...ng resources, such as nitrogen and water, makes an ecosystem more homogeneous and consequently reduces the number of opportunities for competing species to coexi...

Immunization rates hit record high in poor countries

...ore important, as the hemlocks expire they take an ecosystem down as they fall. In cool hollows and along shady mountain streams the hemlock has grown for millennia where other trees wouldn't thrive: a quiet giant soaring to over 150 feet. With a range from Alabama along the Appalachians into the Canadian ...

Fungal factories may save hemlock forests

...ore important, as the hemlocks expire they take an ecosystem down as they fall. In cool hollows and along shady mountain streams the hemlock has grown for millennia where other trees wouldn't thrive: a quiet giant soaring to over 150 feet. With a range from Alabama along the Appalachians into the Canadian ...

Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply

....S., meaning that they can no longer perform their ecosystem role as top predators," says Baum. "The extent of ...eb. "Despite the difficulty of piecing together ecosystem impacts of overfishing," co-author Travis Shepherd of Dalhousie emphasizes, "the real challenge will...

By 2048 all current fish, seafood species projected to collapse

... the role marine biodiversity plays in maintaining ecosystem services, which are those goods and functions that... the first comprehensive assessment of thestate of ecosystem services provided by the biodiversity of the world's oceans to humanity," said Science International...

Fight weeds with plant pathogens

...l problems. Invasive weeds are capable of altering ecosystem processes and displacing native plant and animal species. In addition, weeds serve as reservoirs for plant pathogens that impact crops. According to Rosskopf, there are two approaches used for managing weeds with plant pathogens-the classical biol...

Hundreds of thousands of viral species present in the world's oceans

... insights into diversity, geography, taxonomy, and ecosystem functioning. This approach identified tremendous viral diversity with greater than 91% of DNA sequences not present in existing databases. Angly and colleagues analyzed the distribution of marine phages among the sampling sites and found a correla...

Global changes alter the timing of plant growth, scientists say

... to demonstrate how a typical California grassland ecosystem may respond to future global environmental changes. Researchers from Stanford and the Carnegie Institution's Department of Global Ecology conducted the experiment in about two fenced-off acres of the 1,189-acre Jasper Ridge Biological Preserve. The e...

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