| phenological sequences reveal aggregate life history response to climatic warming. | climatic warming is associated with organisms breeding earlier in the season than is typical for their species. in some species, however, response to warming is more complex than a simple advance in the timing of all life history events preceding reproduction. disparities in the extent to which different components of the reproductive phenology of organisms vary with climatic warming indicate that not all life history events are equally responsive to environmental variation. here, we propose tha ... | 2008 | 18409426 |
| bioaccumulation of persistent organic pollutants in lichen-caribou-wolf food chains of canada's central and western arctic. | while biomagnification of persistent organic pollutants (pops) in aquatic food chains is well documented, there have been few investigations of the trophodynamics of pops in arctic terrestrial food chains. this study presents field-collected concentration data and corresponding fugacities of various hydrophobic organic chemicals (ranging in octanol-water partition coefficients or k(ow) from approximately 10(3.8) to 10(9)) in two lichen species (cladina rangiferina and cetraria nivalis), willow l ... | 2001 | 11347605 |