Water, Coasts and Ice

Aquatic ecosystems provide habitat and migration corridors to a myriad of species, including plants, fishes, amphibians, birds, mammals, and insects. These ecosystems typically contain relatively higher biodiversity than their terrestrial counterparts; yet, aquatic biodiversity loss in North America is occurring at a rate five times faster than in terrestrial ecosystems. One of the major...

Ongoing climate change is impacting areas of snow and ice in high latitudes and high elevation areas and is thus anticipated to change the frequency and magnitude of snow and ice related hazards. In Alaska, snow avalanches are the deadliest natural hazard, and they affect a large portion of the state, significantly impacting the natural landscape, the built environment, and public safety...

The thawing of ice-rich soils in permafrost landscapes, a process known as thermokarst, can result in profound impacts on the energy and water balance, carbon fluxes, wildlife habitat, and existing infrastructure in the local area. The Alaska Thermokarst Model is a “state-and-transition" model being developed to simulate landscape evolution in polygonal tundra landscapes commonly found...

Fish that migrate between fresh and salt waters, called diadromous fishes, are integral to coastal Tribal cultures as subsistence foods. Throughout their Northeast range, diadromous fish populations have shown strong declines over recent decades due to the combined impacts of habitat loss, pollution, overfishing, and climate change. These changes have led to decreasing access to...

Pacific Island societies value, depend on, and actively manage terrestrial and marine ecosystems for the multiple benefits they provide, including those associated with plant and animal abundance, resilience to natural disasters, and the flow of water, soil, and nutrients. New ecosystem service models developed for Pacific Island landscapes now integrate land-to-sea connections, allowing...

The Hawaiian Islands are both biologically and ecologically diverse. To better manage and understand this diverse landscape, detailed, reliable projections of future changes in climate are needed by Hawaiʻi resource managers, such as land managers, conservation organizations, and decision makers. Global climate models (or “general circulation models”) produce projections at regional or...

Riparian systems are critical to the human and ecological communities that interact with them. For the members of San Carlos Apache Tribe, this is particularly true, as riparian systems provide immense cultural and natural values such as ceremonial grounds and recreation areas. However, the riparian areas within the San Carlos Apache Reservation are at risk of degradation due to climate...

Clear Lake, California’s largest freshwater lake, is an important site for seven federally recognized Tribal Nations and numerous related Tribes and Tribal communities, where they hold lakeside cultural ceremonies, fish and recreate, and gather tule reeds. Today, climate change has amplified ecological imbalances within the lake, endangering aquatic wildlife and threatening the health...

The combined effects of climate change (e.g. increased freshwater supply, sea level rise, etc.), leveeing of the Mississippi River, and the gradual settling of soil have led to a land loss crisis in coastal Louisiana. Coastal wetlands provide various ecosystem services to local coastal communities, such as storm protection, flood control, and habitat for economically and ecologically...

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...

Ecosystems spanning the zones from “ridge-to-reef" and “icefield-to-ocean” are home to relatively high levels of biodiversity; serve as conduits of nutrients to sensitive coastal environments; and are culturally and economically important to local communities. These systems are smaller and have unique geological and streamflow properties compared to more typical river systems and...

Stretching almost 1,900 miles from Colorado to the Gulf of America, The Rio Grande supplies drinking water for more than 6 million people and irrigation for about 2 million acres of cropland. In addition to the ecosystem services it provides, the river supports habitat for many native species, such as trout, and the endangered silvery minnow and southwestern willow flycatcher. In 2010, a...