Tag: Biodiversity

Dead Wood, Insects, and Fire

by Kim Crider, SRS Science Communications  • 
Dead wood is a secret harbor of biodiversity. About one-third of all insect species are saproxylic – or dependent upon dead wood – at some stage in their life cycle. The effects of common forest management practices on this important resource and the insects that use it are understudied, especially in subtropical climates. USDA Forest…  More 

Dams & Crayfish Genetics

by Casey Conrad, SRS Science Communications Intern  • 
In Alabama, crayfishes are being separated and genetically changed, which increases the risk of local extinction. This work is not done by a mad scientist, but by dams with their reservoirs and unnatural pools of water. A novel study published in the journal Freshwater Biology by USDA Forest Service scientists Zanethia Barnett and Susan Adams,…  More 

Deadwood in Longleaf Pine Forests

by Naomi Cohen-Shields, SRS Science Communications Intern  • 
Longleaf pine forests are important ecosystems for a broad array of wildlife and understory plant species, such as the red-cockaded woodpecker, the southeastern fox squirrel, and the venus fly trap. Over time, the forests have dwindled due to replacement by other land uses and the suppression of fires with which they evolved. Now, they are…  More 

How Tree Diversity Affects Invasive Forest Pests

by Jennifer Moore Myers, SRS Science Communications  • 
“Invasive insects and diseases pose both ecological and economic threats to our forest ecosystems,” says Qinfeng Guo, USDA Forest Service research ecologist. Guo is the lead author of a broad-scale study of U.S. forest data that examines the relationship between the number of native tree species and the number of nonnative forest pests. Across their…  More 

Definitive New Book on Saproxylic Insects

by Sarah Farmer, SRS Science Communications  • 
Bark-feeders, fungus-feeders, wood-borers, and wood-nesting bees – all are saproxylic insects, which means they depend on dead or dying wood. The insects that prey on or parasitize them are also considered saproxylic. “About a third of all forest insect species are saproxylic,” says USDA Forest Service research entomologist Michael Ulyshen. Ulyshen recently edited a definitive…  More 

Elevation and Invasion

by Sarah Farmer, SRS Science Communications  • 
When humans wander the planet, they carry their plants along, often inadvertently. For example, Plantago major earned the common name ‘white man’s footprint,’ because it hitchhiked to the U.S. with European settlers and began growing along trails and roads. It is a very common species in the Southeast and has naturalized all over the globe.…  More 

Trees in Protected Areas

by Remi Shaull-Thompson, SRS Science Communications Intern  • 
Conservation goals range anywhere from aesthetics to survival. Among the most important of those is ensuring that an ecosystem is resilient to disturbances and provides as many different functions as possible. According to an assessment by a USDA Forest Service cooperating researcher, those qualities can be quantified using two metrics: rarity and evolutionary distinctiveness. Rarity…  More 

Coastal Plain Fish Diversity and Introduced Small Wood

by Jennifer Moore Myers, SRS Science Communications  • 
Coastal plain streams don’t always have swirling eddies or meandering bends. “They can look more like drainage ditches than natural streams,” says USDA Forest Service technician Ken Sterling. Agriculture, flood abatement, and residential development have all contributed to stream straightening in this region. The result? Streams incise and downcut, like a canyon. “These streams are…  More 

The Future of Fish in the NC Piedmont

by Sarah Farmer, SRS Science Communications  • 
What will fish communities of the North Carolina Piedmont look like in the future? “Many factors could affect this,” says U.S. Forest Service research hydrologist Peter Caldwell. “Water withdrawals could be one of the most important.” Water withdrawn from rivers may eventually flow out of kitchen faucets. Many municipalities get drinking water from rivers and…  More 

Dry Tropical Forests in the Caribbean and Latin America under Threat

by Zoё Hoyle, SRS Science Communications  • 
The climate and fertile soils of the dry tropical forests of Latin America and the Caribbean have been important to humans as areas to grow crops since pre-Columbian times. Because of this and more recent use for intensive cultivation and cattle grazing, many of these forests have been cleared, with less than 10 percent of…  More