Plants

Thousands of plant and animal species are culturally important to the Indigenous peoples of North America. Global change is leading to major shifts in the abundance, distribution, and life history of these species, with concomitant effects on their value to the peoples for whom they are most culturally important. While a number of studies have begun to explore the futures of culturally...

Fire size, frequency, overall area burned, and severity are increasing across many vegetation types in the southwestern U.S. In many cases, large contiguous areas are burning repeatedly at high severity, triggering vegetation type conversions (VTC), where once-dominant coniferous forests fail to return to their pre-fire state, often transitioning to shrub- or grass-dominated systems...

The Mediterranean ecosystems of southern California are some of the most ecologically diverse systems in the world. The diversity of plants and animals, as well as high rates of endemism, make the area a biodiversity hotspot. High diversity in plant and animal species contributes greatly to the health and productivity of ecosystems, and plays an important role in the local and state...

Invasive species have increasingly severe consequences for ecosystems and human communities alike. The ecological impacts of invasive species are often irreversible, and include the loss of native species and the spread of disease. Implications for human communities include damaged water transportation systems, reduced crop yields, reduced forage quality for livestock, and widespread...

Estuaries are located at the interface where rivers meet the sea, creating unique ecosystems with complex physical and biological processes. Coastal wetlands provide essential ecosystem services to people, including flood protection from high tides and storm surges, commercial fisheries, carbon sequestration, improved water quality, and wildlife food and habitat. Coastal wetlands are...

Fruit-producing shrubs such as huckleberries, salal, and hazelnut are an important component of social history and traditional tribal diets in the Pacific Northwest. The fruits of these shrubs are also an important food source for foraging wildlife and pollinators, and serve as the basis for both non-tribal harvesting and small-scale commercial operations. Among land managers and tribes...

Managing natural resources is fraught with uncertainties around how complex social-ecological systems will respond to management actions and other forces, such as climate. Modeling tools have emerged to help grapple with different aspects of this challenge, but they are often used independently. The purpose of this project is to link two types of commonly-used simulation models (agent...

In order to assess and understand the potential impacts of climate change on important natural resources, managers, planners, and decision-makers need climate information at a local or regional scale. In general, Global Climate Models (GCMs) provide data at coarser scales than most natural resource managers need but Regional Climate Models (RCMs) are starting to deliver finer scale...

Phenology, or the timing of the annual cycles of plants and animals, is extremely sensitive to changes in climate. We know that plants and animals may adjust the timing of certain phenological events, such as tree flowering or migration, based on changes in weather. However, it’s important that we also understand how the timing of phenological events is changing over longer time frames...

Invasive plants are a major land management problem in the Western U.S. Cheatgrass (Bromus tectorum) is the most prominent and problematic invader in cold deserts, with negative effects on rangeland fire patterns, wildlife habitats, and forage/vegetation. Red brome (B. madritensis) is an invader in the Mojave Desert, and can similarly introduce a new fire patterns to sensitive warm...

In many places around the world, spring events, like warming temperatures, are coming earlier and fall events are coming later than they have in the past. These changes have implications for the phenology, or the timing of natural life events (e.g. the timing of plant flowering in Spring or leaves falling in Autumn), of many plant species. However, not all species and regions are...

Climate change impacts on water resources in the Pacific Northwest are predicted to have transformational effects on agriculture. Loss of winter snow pack, reduced summer stream flows, and increased summer temperatures are all phenomena that have already been observed, and are expected to worsen over this century. Research is ongoing in the Northwest to understand agriculture practices...