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Keyword: climate change

Population increases and climate change point to future U.S. water shortages

FS News Posted on: February 28, 2019
* News release issued by the American Geophysical Union Climate change plus population growth are setting the stage for water shortages in parts of the U.S. long before the end of the century, according to a new study in the AGU journal Earth’s Future.

Sampling bias overestimates climate change impacts on forest growth in the southwestern United States

Publications Posted on: February 20, 2019
Climate-tree growth relationships recorded in annual growth rings have recently been the basis for projecting climate change impacts on forests. However, most trees and sample sites represented in the International Tree-Ring Data Bank (ITRDB) were chosen to maximize climate signal and are characterized by marginal growing conditions not representative of the larger forest ecosystem.

How we sample trees influences our assessment of climate change impacts on forests

Publications Posted on: February 20, 2019
It seems as though dire predictions of U.S. forest decline continue to roll off the presses. Even the Nation’s forest census, the USDA Forest Service Forest Inventory and Analysis (FIA) program, has measured elevated levels of tree mortality in many forest types - mostly as a result of fires, drought, and insect outbreaks. However, in contrast to these indicators of decline, the FIA program also shows substantial regeneration and regrowth.

Will landscape fire increase in the future? A systems approach to climate, fire, fuel, and human drivers

Publications Posted on: February 13, 2019
The extent of the Earth's surface burned annually by fires is affected by a number of drivers, including but not limited to climate. Other important drivers include the amount and type of vegetation (fuel) available and human impacts, including fire suppression, ignition, and conversion of burnable land to crops.

Climate-based seed transfer of a widespread shrub: population shifts, restoration strategies, and the trailing edge

Publications Posted on: December 17, 2018
Genetic resources have to be managed appropriately to mitigate the impact of climate change. For many wildland plants, conservation will require knowledge of the climatic factors affecting intraspecific genetic variation to minimize maladaptation.

When tree rings go global: Challenges and opportunities for retro- and prospective insight

Publications Posted on: December 04, 2018
The demand for large-scale and long-term information on tree growth is increasing rapidly as environmental change research strives to quantify and forecast the impacts of continued warming on forest ecosystems. This demand, combined with the now quasi-global availability of tree-ring observations, has inspired researchers to compile large tree-ring networks to address continental or even global-scale research questions.

Fine-scale environmental DNA sampling reveals climate-mediated interactions between native and invasive trout species

Publications Posted on: November 29, 2018
It is widely recognized that biotic interactions may act as important mediators of species responses to climate change. However, collecting the abiotic and biotic covariates at the resolution and extent needed to reveal these interactions from species distribution models is often prohibitively expensive and labor-intensive.

Southwestern white pine (Pinus strobiformis) species distribution models project a large range shift and contraction due to regional climatic changes

Publications Posted on: November 19, 2018
Southwestern white pine (Pinus strobiformis; SWWP) is a conifer species that occurs at mid to high elevations in the mountains of Arizona, New Mexico, and northern Mexico. A key component of mixed conifer forests in the region, SWWP is an important species for wildlife and biodiversity.

Forest ecosystem re-organization underway in the southwestern United States: A preview of widespread forest changes in the Anthropocene?

Publications Posted on: November 13, 2018
This paper addresses an important set of issues currently facing the forests of western North America - the intersection of 20th Century land use legacies and the emerging impacts of climate change on drought, forest stress, wildfire, and ecosystem change.

Predicting vegetation phenology in response to climate change using bioclimatic indices in Iraq

Publications Posted on: October 05, 2018
Although most phenology models can predict vegetation response to climatic variations, these models often perform poorly in precipitation-limited regions. In this study, we modified a phenology model, called the Growing Season Index (GSI), to better quantify relationships between weather and vegetation canopy dynamics across various semi-arid regions of Iraq.