Allantoin and allantoate, ureides formed during the catabolism of purines, accumulate in plant tissue in response to drought and other abiotic stresses. Allantoin, allantoate, and a precursor molecule, uric acid, have been ...

A full understanding of population dynamics requires knowledge about the relative contributions of both adult survival and recruitment to population growth rate. Avian life cycles consist of a number of reproductive stages ...

To survive, prey must recognize predators and appropriately respond to the associated risk. Some prey must first gain this information through experience. Naïve fathead minnows (Pimephales promelas) learn to recognize a ...

Arbuscular mycorrhizas (AM) are the plant root-fungus interactions that are most widespread mycorrhiza in nature. As classically defined, there are two major AM morphologies named after the plant genera in which they were ...

Climate change is predicted to significantly alter ecosystem functioning and species distributions across the globe. Arctic and alpine areas are experiencing a faster rate of temperature increase as compared to other ...

The hormone corticosterone (CORT) helps mediate the relationship between birds and their environment. I studied nestling and adult birds in several diverse contexts to understand how sources of environmental variability ...

Climate change is expected to alter patterns of disturbance, which in turn may drive future ecosystem change. This interaction may be particularly important in sub-arctic regions due to rapid climate change and frequent ...

Ecologists and conservation biologists alike aim to understand factors determining the abundance and distribution of free-living organisms and to pinpoint why free-ranging animal populations decline. My broad goals were ...

Oil and gas exploration conducted in the 1970s left behind a legacy of abandoned well sites in the Mackenzie Delta region of northern Canada, including several in the Kendall Island Migratory Bird Sanctuary and surrounding ...

Global climate models predict that the current trend of warming in the Arctic will continue over the next century. The productivity of arctic plants is often limited by short growing seasons with relatively low temperatures ...