Much of the rural poor-who are growing in number-are concentrated in ecologically fragile and remote areas. The key ecological scarcity problem facing such poor households is a vicious cycle of declining livelihoods, increased ecological degradation and loss of resource commons, and declining...

The growing literature on ecosystem services suggests that these benefits are the direct or indirect contributions that ecosystems make to the well-being of human populations. Although the approach to valuing ecosystem services seems straightforward, in practice there are a number of challenges....

The growing literature on ecosystem services suggests that these benefits are the direct or indirect contributions that ecosystems make to the well-being of human populations. Although the approach to valuing ecosystem services seems straightforward, in practice there are a number of challenges....

The global decline in estuarine and coastal ecosystems (ECEs) is affecting a number of critical benefits, or ecosystem services. We review the main ecological services across a variety of ECEs, including marshes, mangroves, nearshore coral reefs, seagrass beds, and sand beaches and dunes. Where...

This paper investigates the relationships among land-use change, biological invasion, and interspecific competition in a tropical ecosystem by linking a behavioral model of land conversion by agriculture and an ecological model of interspecific competition between a native species and an exotic...

Much of the rural poor -- who are growing in number -- are concentrated in ecologically fragile and remote areas. The key ecological scarcity problem facing such poor households is a vicious cycle of declining livelihoods, increased ecological degradation and loss of resource commons, and...

Much of the rural poor -- who are growing in number -- are concentrated in ecologically fragile and remote areas. The key ecological scarcity problem facing such poor households is a vicious cycle of declining livelihoods, increased ecological degradation and loss of resource commons, and...

Human-dominated marine ecosystems are experiencing accelerating loss of populations and species, with largely unknown consequences. We analyzed local experiments, long-term regional time series, and global fisheries data to test how biodiversity loss affects marine ecosystem services across...