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Keyword: drought

Examining the patterns and processes of grassland resiliency to drought

Projects Posted on: November 02, 2018
With increasing temperatures due to climate change and the inherent interannual variability in precipitation of most grasslands, droughts will likely increase in frequency and intensity across the Great Plains. Precipitation legacies from previous years can impact current year productivity in arid grasslands by shifting tiller and bud bank densities of the dominant grasses. Belowground bud survival during drought and the ability of buds to break dormancy following drought are key to maintaining a resilient grassland in both arid and mesic grasslands.

Ecology and management of sand shinnery communities: a literature review

Publications Posted on: August 01, 2018
Sand shinnery is codominated by oak shrubs and mid and tallgrasses; the grasses are usually taller than the oaks. The shrubs are the small, visible shoots of massive underground stem systems, which are hundreds or thousands of years old. Sand shinnery occupies 5 to 7 M acres in western Oklahoma, western Texas, and southeastern New Mexico.

Invasive Species Science Update (No. 10)

Publications Posted on: April 26, 2018
In this issue, we cover new research on wide-ranging topics from the longterm effects of drought on competition between native and invasive plant species, to the effects of drought on pollinator visitation to invasive plants, to a novel use of insect pheromones to improve biocontrol of invasive saltcedar.

Global patterns of drought recovery

Publications Posted on: April 10, 2018
Drought, a recurring phenomenon with major impacts on both human and natural systems is the most widespread climatic extreme that negatively affects the land carbon sink. Although twentieth-century trends in drought regimes are ambiguous, across many regions more frequent and severe droughts are expected in the twenty-first century.

Fine-scale spatial climate variation and drought mediate the likelihood of reburning

Publications Posted on: March 27, 2018
In many forested ecosystems, it is increasingly recognized that the probability of burning is substantially reduced within the footprint of previously burned areas.

MODIS-based annual production estimates from 2000-2015 for rangelands in USFS grazing allotments in Region 5

Datasets Posted on: March 15, 2018
This data publication contains an ESRI grid dataset describing annual productivity and drought in the non-forest domain of Region 5 (California) of the United States Forest Service (USFS). Production data were generated from the Rangeland Vegetation Simulator (RVS).

Tree mortality estimates and species distribution probabilities in southeastern United States forests

Publications Posted on: October 05, 2017
Stresses to trees under a changing climate can lead to changes in forest tree survival, mortality and distribution.  For instance, a study examining the effects of human-induced climate change on forest biodiversity by Hansen and others (2001) predicted a 32% reduction in loblolly–shortleaf pine habitat across the eastern United States.  However, they also predicted an average increase in area of 34% for oak-hickory forests and a 290% increase

Climate change vulnerability assessment of forests in the Southwest USA

Publications Posted on: July 19, 2017
Climate change effects are already apparent in some Southwestern US forests and are expected to intensify in the coming decades, via direct (temperature, precipitation) and indirect (fire, pests, pathogens) stressors.

The tortoise and the hare: Can the slow native plant win?

Science Spotlights Posted on: May 03, 2017
It has been suggested that exotic plants will be more successful than native plant species as a result of climate change. This is because exotics often exhibit stronger responses to disturbance, faster growth rates, and greater plasticity. In this study, we show that climate change can actually shift the balance in favor of natives when it creates conditions that favor the slower more "tortoise-like" strategies of some natives.

The tortoise and the hare: Reducing resource availability shifts competitive balance between plant species

Publications Posted on: April 14, 2017
Determining how changes in abiotic conditions influence community interactions is a fundamental challenge in ecology. Meeting this challenge is increasingly imperative in the Anthropocene where climate change and exotic species introductions alter abiotic context and biotic composition to reshuffle natural systems.