Tag: "vegetation" at biology news

Tropical insects 'go the distance' to inform rainforest conservation

...tay close to home dining only on locale-specific vegetation is being challenged by new research findings that suggest these insects feast on a broader menu of foliage and can be consistently found across hundreds of miles of tropical forestland. These findings have significant implications related to the ...

Climate change and permafrost thaw alter greenhouse gas emissions in northern wetlands

... ecosystems, Turetsky said. The study showed that vegetation responds to the flooding with a boost in productivity. More vegetation sequesters more carbon away from the atmosphere in plant biomass. This is actually good news from ...

Proteaceae spread by continental drift and transoceanic dispersal

...species from other genera that occur in the fynbos vegetation (literally, fine leaved shrubs) of the highly diverse south-western Cape biodiversity hotspot are much younger, and have Australian relatives says Nigel Barker of Rhodes University, South Africa. This new finding is important, as it challenges the...

Viewing ecosystems from above

...ecording the echo from laser pulses reflecting off vegetation and ground surfaces. Satellites provide synoptic views with the potential to make repeat observations. Yet the technology, according to Susan Ustin (University of California, Davis), is limited by todays spatial and spectral resolutions and their ...

Chickadee, nutchatch presence in conifers increases tree growth, says CU-Boulder study

... Chemicals in trees known as terpenes, which give vegetation distinctive odors, have been implicated in the resistance of trees to parasites and plant-eating insects, he said. By removing insects, the birds indirectly altered the terpene composition of pine tissues, said Linhart. The alteration of terpene ...

ESA mission highlighted at remote sensing conference

...tant role in the global water cycle as it controls vegetation growth to a large extent. Because in-situ measurem...tant role in the global water cycle as it controls vegetation growth to a large extent. Because in-situ measurements of soil moisture are sparse, more data are ur...

Wider buffers are better

...narrow buffers (0-25 meters). Buffers of different vegetation types were equally effective but herbaceous and forest vegetation were more effective when wider. Removal of nitrogen within the water was efficient, but not related ...

A new plant-bacterial symbiotic mechanism promising

...biotic association with bacteria can contribute to vegetation regeneration schemes on soils depleted in nitrogen owing to overexploitation, erosion or desertification. The plant cover thus formed can help achieve ecological restoration, by enriching the soils in nitrogen. However, the symbiotic processes studie...

Revolutionary global environment fund announces $50M expansion

...me risk, with at least 70 percent of their natural vegetation already lost. In Indo-Burma, only 5 percent remains in pristine condition. CEPF makes funding available through grants for nongovernmental organizations and other civil society groups to help conserve the hotspots. The first step in grant making fo...

Illinois-based study of energy crops finds miscanthus more productive than switchgrass

...petroleum-based fuels. Biomass is plant material, vegetation or agricultural waste used as fuel. Converting biomass into biofuels can be costly and slow. Two crops, both classified as C4 perennial grasses, have been studied extensively to determine how best to improve costs and production rates. Switchgr...

Loss of hemlocks will affect water dynamics in southern Appalachian forests

...duration of these changes will depend on how other vegetation responds to the loss of hemlock. ...

Biocontrol of invasive water hyacinth contributes to socioeconomic and health improvements in Africa

...e vectors of malaria and schistosomiasis. Rotting vegetation contaminated drinking water, increasing cases of gastrointestinal diseases. Dr. Ogwang and his colleagues used the natural predators of the plant to help eradicate it--the mottled water hyacinth weevil, N. eichhorniae, and the chevroned water hyaci...

Early fire risk for mountains near Los Angeles

...elsewhere have developed a new way to predict when vegetation dries to the point it is most vulnerable to large-...fornia region and nationally to other places where vegetation moisture is an important factor in fires. Santa Anas are strong, hot, dry winds that blow over So...

MIT tool determines landslide risk in tropics

...lope, the inclination of the slope and the type of vegetation growth to determine an area's hazard rating, which... area, overlaid with data on slope inclination and vegetation growth. Some of their findings are a bit counterintuitive, Saldivar-Sali explained. For instance, st...

Prey not hard-wired to fear predators

...irds were less abundant because moose over-browsed vegetation used by these migrants. It is not just changes in climate or disease may alter our big remote wild landscapes, but so do the actions of conservationists and public agencies by restoring ecosystems to bring native carnivores back to where they once th...

Woods Hole Research Center scientists study impacts of industrial logging in Central Africa

...e imagery to tropical forest ecosystems, including vegetation mapping, land-use change, and deforestation causes and consequences. She has been involved in numerous environmental projects in Africa over the past 20 years, working with in-country scientists, foresters, and international conservation organization...

Caribbean frog populations started with single, ancient voyage on South American raft

... islands likely hitched a ride on floating mats of vegetation called flotsam, the method typically used by land animals to travel across salt water. It's not likely that the frog species dispersed simply by swimming because frogs dry out easily and are not tolerant of salt water. In addition to the study's di...

Caribbean frogs started with a single, ancient voyage on a raft from South America

... islands likely hitched a ride on floating mats of vegetation called flotsam, which is the method typically used by land animals to travel across salt water. "Some rafts of flotsam, if they are washed out of rivers during storms and caught in ocean currents, can be more than a mile across and could include pla...

Envisat captures first image of Sargassum from space

...ides an assessment of the amount of chlorophyll in vegetation to produce detailed images of chlorophyll per unit...otosynthesis. The amount of chlorophyll present in vegetation plays an important role in determining how healthy it is. Accurately monitoring chlorophyll from spa...

A new plant-bacterial symbiotic mechanism promising for crop applications

...biotic association with bacteria can contribute to vegetation regeneration schemes on soils depleted in nitrogen owing to overexploitation, erosion or desertification. The plant cover thus formed can help achieve ecological restoration, by enriching the soils in nitrogen. However, the symbiotic processes studie...

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