Climate and Land Use Change

Filter Total Items: 67
Date published: May 12, 2017
Status: Active

Climate Change in the Chesapeake Bay Watershed: Effects on Riverine Discharge, Ecosystems, and Water Quality

The 64,000-square mile watershed that drains to the Chesapeake Bay is highly populated and has diverse land use, including forested, agricultural, and urbanized areas. Increased precipitation in the eastern United States over the last 100 years has affected stream flow and thus the loading of pollutants delivered to the bay. Such pollutants as suspended sediment and dissolved phosphorus and...

Contacts: Karen C Rice
Date published: May 9, 2017

Time Series of Glacier Retreat

The retreat of glaciers in Glacier National Park, Montana, has received widespread attention by the media, the public, and scientists because it is a clear and poignant indicator of change in the northern Rocky Mountains of the USA.  In 2017 the...

Date published: May 9, 2017

GLACIER SIMULATION

The simulation reflects the predicted exponential rise in atmospheric CO2 concentrations, a 2xCO2 "global warming" scenario, by 2030 with a concurrent warming of 2-3 degrees centigrade (4-5 degrees Fahrenheit) by the year 2050. In addition it assumes that precipitation, primarily during the winter, will increase over the same time period five to 10 percent. The animation view of the Blackfoot-...

Date published: March 14, 2017

Quantitative Analysis Using Structural Equation Modeling

USGS scientists have been involved for a number of years in the development and use of Structural Equation Modeling (SEM). This methodology represents an approach to statistical modeling that focuses on the study of complex cause-effect hypotheses about the mechanisms operating in systems. SEM is increasingly used in ecological and environmental studies and this site seeks to provide...

Date published: October 16, 2016

Modeling Past Variation in Florida Manatee Survival, Breeding, and Movements Rates to Establish Baselines for Aquatic Ecosystem and Restoration Research

Long-term monitoring data in the Manatee Individual Photo-identification System (MIPS), developed and coordinated by WARC-Sirenia Project in collaboration with Florida’s Fish and Wildlife Research Institute and Mote Marine Laboratory, are the basis for modeling manatee demography rates.

Date published: September 20, 2016

Improving Our Ability to Forecast Tidal Marsh Response to Sea Level Rise

The Challenge: Accelerations in sea-level rise and changing environmental stressors have important implications for the integrity of coastal wetlands and for efforts to restore and protect the ecosystem services they provide. Their persistence and adaptation to these stressors depends on the net effects of changes in physical processes and biotic responses. Future planning by decision makers...

Date published: September 20, 2016

Post-fire Recovery Patterns in Southwestern Forests

High-severity crown fires in Southwestern dry-conifer forests — resulting from fire suppression, fuel buildups, and drought — are creating large treeless areas that are historically unprecedented in size. These recent stand-replacing fires have reset extensive portions of Southwest forest landscapes, fostering post-fire successional vegetation that can alter ecological recovery trajectories...

Contacts: Collin Haffey
Date published: August 2, 2016
Status: Active

Assessing Coastal Forest Impacts and Resource Management Implications following Hurricane Sandy

Tropical storms and hurricanes wreak havoc with coastal forests where damage can vary with wind speed and approach from isolated treefalls to wide-area blowdowns of whole forests.

Date published: August 1, 2016

Monitoring and Assessing Effects of the Picayune Strand Restoration Project (PSRP) on the Florida Manatee

Critical information predicting condition changes in manatee habitat resulting from the alteration of freshwater flows to estuaries is needed to develop the PSRP Detailed Design and PSRP Operations Plan components and complete consultation under the Endangered Species Act.

Date published: August 1, 2016

Hurricane Sandy Impacts on Coastal Wetland Resilience in the Northeast United States

The Challenge: The high winds and storm surge associated with Hurricane Sandy impacted coastal wetlands from Virginia to Maine. Understanding the ecological and geological impacts of hurricanes on coastal wetlands and their interactive effects with local conditions is important for identifying resilience of these communities to predicted global sea-level rise. Given the projected increase in...

Date published: July 26, 2016

National Park Service Visitor Spending Effects

The National Park Service (NPS) manages the Nation’s most iconic destinations that attract millions of visitors from across the Nation and around the world. Trip-related spending by NPS visitors generates and supports a considerable amount of economic activity within park gateway communities. USGS economists collaborate with the National Park Service social science program to estimate NPS...

Date published: July 25, 2016

Implications of Climate Change for Avian Conservation in Great Plains Landscapes

Playas in the Great Plains Landscape Conservation Cooperative (GPLCC) are at risk for both increased sedimentation and reduced inundation due to predicted increased summer temperatures, decreased annual precipitation, and agricultural intensification. Among other benefits, playas provide essential habitat for many wetland-dependent species and are especially important as critical refueling...