Abstract Five decades of intensive groundwater exploitation have brought important economic, social and environmental changes in Medina del Campo Groundwater Body (MCGWB). Declining piezometric levels worsened water quality, increased the costs supply abstraction, drained connected wetlands rivers. This chapter presents different methods tools developed to assess impacts effectiveness for adapt...

Abstract This study compares the δ 15 N values and trophic position of two seabird species throughout late Holocene in three regions southwestern Atlantic Ocean to assess hypothesis that decimation megafauna led changes mesopredators. Modern ancient mollusk shells were also analyzed account for isotopic baseline through time. Results revealed modern Magellanic penguins have higher than their co...

Globally, commercial fisheries for whelk (family Buccinidae) generally exhibit a boom-and-bust cycle that fuels overexploitation of resources. Channeled Busycotypus canaliculatus is commercially important species supports valuable fishery along the Atlantic coast United States. The managed at state level, with minimum landing size varying by state. Biological studies channeled in New England an...

The model presented in this paper distinguishes an industrial and an agricultural sector within a developing economy. Environmental degradation results from the overexploitation of a renewable resource due to a common pool externality, which causes agricultural productivity to decline. The model considers a di erentiated peasantry where land ownership and savings behaviour di er across income c...

Skates (Rajidae) are characterized by slow growth rate, low fecundity, and late maturity and are thus considered to be vulnerable to exploitation. Although understanding mating systems and behavior are important for long-term conservation and fisheries management, this aspect of life history is poorly understood in skates. Using 5 highly polymorphic microsatellite loci, we analyzed egg clutches...

Food-web perturbations stemming from climate change, overexploitation, invasive species and habitat degradation often cause an initial loss of species that results in a cascade of secondary extinctions, posing considerable challenges to ecosystem conservation efforts. Here, we devise a systematic network-based approach to reduce the number of secondary extinctions using a predictive modelling f...

This paper analyzes the responses of profit maximizing groundwater users to modifications (elimination, reduction, decoupling) of the subsidy to electricity frequently used for water pumping. It proposes a theoretical model, and numerically derives general results for a simplified case with homogeneous users. The model is applied to aquifers in Leon, Guanajuato, Mexico and in Kern County, Calif...

– Commercial exploitation of freshwater turtles and tortoises has increased significantly in China since the 1990s, which has expedited the listing of some turtle species in Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) Appendix II. We assessed the risk to tortoises and freshwater turtles native to China by analyzing biological and socio-economic variab...

One of the basic tenets of the theory of common property resources is that private property rights work to conserve natural resources. There is growing evidence, however, that some large forest owners in Maine are cutting their forests heavily, using poor-quality silviculture techniques. This overexploitation is being done by paper companies, forest contractors, and some private land owners, wh...