Long-term field studies of these finches have provided strong evidence that beak morphology evolves rapidly in response to changing ecological conditions, such as food type, food availability and interspecific competition [ 2- 4].
The range of terrestrial foods sought by polar bears suggests a high level of plasticity in their foraging behavior which may have always been present (e.g., [ 25]), but actually might be increasing over time in response to changing ecological conditions [ 26].
The current model structure provides a maximal coverage strategy that allows decision makers to target and prioritize several areas for protection or development and to set specific strategies in the face of changing ecological, social, or economic processes.
His March grosbeaks may be only a small part of changing ecological statistics in the region.
Recently much of Frédérique's time has been taken up with drawing expanding villages and summer vistas – reflecting the changing ecological environment in the mountains – although this year Formigal is enjoying heavy snowfalls.
For example, models can be so complex that they can only be applied on a limited set of species, or models can be so qualitative that they fail to deliver insight in the underlying processes behind changing ecological quality.
There is a recognition that regulation alone will not be enough in the face of rapidly changing ecological conditions.
Hypotheses attempting to explain ecological processes in running waters include the concept of the river continuum, which explains differences in lotic communities according to the changing ecological factors along the river system.
