Darius Semmens (Former Employee)
Science and Products
Social Values for Ecosystem Services (SolVES)
In response to the need for incorporating quantified and spatially explicit measures of social values into ecosystem service assessments, the geographic information system (GIS) application, Social Values for Ecosystem Services (SolVES), was developed. SolVES is designed to assess, map, and quantify the perceived social values of ecosystem services. Social values, the perceived, nonmarket values...
Ecosystem Services Assessment and Valuation
Ecosystem services are the benefits that nature provides to human well-being: clean air and water, protection from natural disasters, fisheries, crop pollination and control of pests and disease, and outdoor places for recreation, solitude, and renewal. Ecosystem services underlie the functioning of our entire economy. They are neither worthless nor priceless, and by integrating the physical...
Ecosystem Services Valuation Pilot Study
This project will use newly-collected data on human use and values, paired with existing ecological data and open source software tools to map what, where, and how people value the Cape Lookout National Seashore, North Carolina (CALO) landscape for a variety of different social value types. In addition, we will model and map biophysical features, the provision and use of key ecosystem services...
Spatial Subsidies: Quantifying Linkages between Human and Natural Systems with Migratory Species
Animal migration occurs because it allows animals to exploit resources where and when they are most abundant by moving seasonally between habitats. Where humans have come to exploit, enjoy or otherwise benefit from migratory species, we too are capitalizing on the seasonal bounty of distant ecosystems. The benefits we derive from migratory species are economically and culturally important; they...
Monarch Conservation Science Partnership
The Challenge Over the last two decades, the Eastern migratory population of monarch butterflies has declined by about 80%, leading many scientists to consider how to best conserve and rebuild monarch populations. Conservation efforts can be challenging to design and execute because of the multi-generational migration of monarchs that spans North America. Conservationists must consider many...
Animal Migration and Spatial Subsidies: Establishing a Framework for Conservation Markets
Migratory species may provide more ecosystem goods and services to humans in certain parts of their range than others. These areas may or may not coincide with the locations of habitat on which the species is most dependent for its continued population viability. This situation can present significant policy challenges, as locations that most support a given species may be in effect...
Developing the next generation of USGS resource assessments
Resource assessments constitute a key part of the USGS mission, and represent a crucial contribution toward Department of the Interior (DOI) and broader Federal objectives. Current USGS energy and mineral assessment methods evaluate total technically recoverable resources (energy) or economically exploitable materials (minerals); the fiscal year 2010 budget for this work is $82M. To help...
Science and Products
Social Values for Ecosystem Services (SolVES)
In response to the need for incorporating quantified and spatially explicit measures of social values into ecosystem service assessments, the geographic information system (GIS) application, Social Values for Ecosystem Services (SolVES), was developed. SolVES is designed to assess, map, and quantify the perceived social values of ecosystem services. Social values, the perceived, nonmarket values...
Ecosystem Services Assessment and Valuation
Ecosystem services are the benefits that nature provides to human well-being: clean air and water, protection from natural disasters, fisheries, crop pollination and control of pests and disease, and outdoor places for recreation, solitude, and renewal. Ecosystem services underlie the functioning of our entire economy. They are neither worthless nor priceless, and by integrating the physical...
Ecosystem Services Valuation Pilot Study
This project will use newly-collected data on human use and values, paired with existing ecological data and open source software tools to map what, where, and how people value the Cape Lookout National Seashore, North Carolina (CALO) landscape for a variety of different social value types. In addition, we will model and map biophysical features, the provision and use of key ecosystem services...
Spatial Subsidies: Quantifying Linkages between Human and Natural Systems with Migratory Species
Animal migration occurs because it allows animals to exploit resources where and when they are most abundant by moving seasonally between habitats. Where humans have come to exploit, enjoy or otherwise benefit from migratory species, we too are capitalizing on the seasonal bounty of distant ecosystems. The benefits we derive from migratory species are economically and culturally important; they...
Monarch Conservation Science Partnership
The Challenge Over the last two decades, the Eastern migratory population of monarch butterflies has declined by about 80%, leading many scientists to consider how to best conserve and rebuild monarch populations. Conservation efforts can be challenging to design and execute because of the multi-generational migration of monarchs that spans North America. Conservationists must consider many...
Animal Migration and Spatial Subsidies: Establishing a Framework for Conservation Markets
Migratory species may provide more ecosystem goods and services to humans in certain parts of their range than others. These areas may or may not coincide with the locations of habitat on which the species is most dependent for its continued population viability. This situation can present significant policy challenges, as locations that most support a given species may be in effect...
Developing the next generation of USGS resource assessments
Resource assessments constitute a key part of the USGS mission, and represent a crucial contribution toward Department of the Interior (DOI) and broader Federal objectives. Current USGS energy and mineral assessment methods evaluate total technically recoverable resources (energy) or economically exploitable materials (minerals); the fiscal year 2010 budget for this work is $82M. To help...