▪ Abstract Declines and losses of amphibian populations are a global problem with complex
local causes. These may include ultraviolet radiation, predation, habitat modification …

Agricultural landscapes, although often highly altered in nature, provide habitat for many
species of amphibian. However, the persistence and health of amphibian populations are …

Food webs in nature have multiple, reticulate connections between a diversity of consumers
and resources. Such complexity affects web dynamics: it first spreads the direct effects of …

Extinctions are normal biological phenomena. Both mass extinctions in geological time and
local extinctions in ecological time are well documented, but rates of extinction have …

This study quantifies the flow of energy and biomass from a productive marine system to a
relatively unproductive terrestrial system. Biomass from marine food webs (here, the Gulf of …

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 …

La dinámica espacial de anfibios se asemeja de muchas maneras a los modelos
metapoblacionales clásicos donde las subpoblaciones en los estanques de reproducción …

Urbanisation currently threatens over one-third of the world's known amphibian species. The
main threats of urbanisation to amphibian populations are habitat loss, habitat fragmentation …

Strategies for optimal metamorphosis are key adaptations in organisms with complex life
cycles, and the components of the larval growth environment causing variation in this trait …

A mphibians, as a group, are geographically widespread, occurring on most major land
masses and in a wide variety of habi-tats. The diversity of behavioral, physiological, and life …