The extensive development of surface and subsurface drainage systems to facilitate
agricultural production throughout North America has significantly altered the hydrology of …

▪ Abstract Lentic freshwater habitats in temperate regions exist along a gradient from small
ephemeral ponds to large permanent lakes. This environmental continuum is a useful axis …

Ecosystems provide essential services for human society, which include provisioning,
regulating, cultural, and supporting services. Amphibians provide provisioning services by …

Defensive genes in plants can be activated by several different types of nonpeptide
signaling molecules. An endogenous polypeptide, consisting of 18 amino acids, was …

Reports of declining amphibian populations in many parts of the world are numerous, but
supporting long-term census data are generally unavailable. Census data from 1979 to …

What is most evident in the recent debate concerning new wetland regulations drafted by the
US Army Corps of Engineers is that small, isolated wetlands will likely continue to be lost …

Coordinated efforts by ecologists and natural resource managers are necessary to balance
the conservation of biological diversity with the potential for sustained economic …

Vast networks of roads cover the earth and have numerous environmental effects including
pollution. A major component of road runoff in northern countries is salt (mostly NaCl) used …

We describe a conceptual model, the wetland continuum, which allows wetland managers,
scientists, and ecologists to consider simultaneously the influence of climate and hydrologic …

Human impacts obviously have reduced or eliminated many populations of amphibians and
other organisms. Recent reports, however, have suggested that declines and …