Forests

On remote Pacific islands and outer atolls, agroforestry (i.e., the cultivation and conservation of trees for agriculture) provides food security and income to local communities. Growing instability from climate change and invasive species like the coconut rhinoceros beetle threaten these resources. Actively managing and sustaining agroforestry resources requires detailed and up-to-date...

In the Western U.S., approximately 65% of the water supply comes from forested regions with most of the water that feeds local rivers coming from snowmelt that originates in mountain forests. The Rio Grande headwaters (I.e. the primary water generating region of the Rio Grande river) is experiencing large changes to the landscape primarily from forest fires and bark beetle infestations...

Indigenous peoples and nations are on the front lines of climate change impacts and are leading the way in innovative adaptation action, such as in the use of traditional burning. Traditional burning has been recognized as a robust adaptation strategy, increasing the resiliency of ecosystems and the local communities that depend on them for their economic and social well-being...

Hawaiʻi’s native forest birds are known worldwide for their diversity and beauty. Unfortunately, many species are heading towards extinction because of bird malaria spread by mosquitoes introduced over a century ago. Remaining populations of these highly threatened forest birds tend to be at high elevations near the tree line on mountains, where cooler temperatures limit mosquitoes and...

As pressures from climate change and other anthropogenic stressors, like invasive species, increase, new challenges arise for natural resource managers who are responsible for the health of public lands. One of the greatest challenges these managers face is that the traditional way of managing resources might not be as effective, or in some cases might be ineffective, in light of...

Forests in California’s Sierra Nevada have become increasingly vulnerable to wildfires due to fire suppression practices, elevated tree mortality and warming temperatures. With these fires growing in severity, these forests are struggling to recover on their own, creating landscapes that are more susceptible to future fires and increased forest loss. Researchers supported by this...

California black oak (Quercus kelloggii) groves are a fundamental part of the landscape in Yosemite Valley and the tree is a cultural keystone species for associated Tribal Nations. For centuries, tribal members have planted, tended, burned, and gathered around black oak. Before Euro-American settlers, the tribes actively maintained a sacred, reciprocal relationship with these groves...

California black oak (Quercus kelloggii) groves are a fundamental part of the landscape in Yosemite Valley and the tree is a cultural keystone species for associated Tribal Nations. For centuries, tribal members have planted, tended, burned, and gathered around black oak. Before Euro-American settlers, the tribes actively maintained a sacred, reciprocal relationship with these groves...

Madagascar, a country rich in natural capital and biodiversity but with high levels of poverty, food insecurity, and population growth, faces a number of development challenges, including obtaining sustained financial support from external sources and building internal capacity to address the poor environmental, health, and socio-economic conditions. Climate change poses an increasing...

The Southwest is projected to face significant climate challenges in coming decades; and many of these stresses have already begun. In recent years, multiple climate assessments have been developed for the Southwest that corroborate forecasts of remarkable change to vegetation pattern and the vulnerability of regional ecosystems and suggest that measurable change is already ongoing...

In the Peninsular and Transverse Mountain Ranges of Southern California, montane forests (above 1200 m/4000 ft in elevation) are primarily restricted to “sky islands” of mixed conifer and hardwood species. Montane forests protect the upper watersheds of all the region’s major rivers, providing about 40% of the water used for human, agricultural, and industrial purposes in Southern...

In recent decades, average temperatures across the U.S. Southwest have increased substantially and precipitation patterns have increased in variability. The warmer temperatures directly impact water availability within Southwest ecosystems, including earlier snowmelts; reduced snowpacks, soil moisture, and streamflow; and lower humidity. Collectively, this has led to an increase in...