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Cellular signalling pathways involved in thermoprotection of neural ciruit function in the locust.
(2009-08-27)
Environmental temperature is arguably one of the most important abiotic physical factors
affecting insect behaviour. Temperature affects virtually all physiological processes
including those that regulate nervous system ...
Controls on Seasonal Nitrogen Cycling in Canadian Low Arctic Tundra Ecosystems
(2009-09-27)
Soil nitrogen availability to plants is a fundamental control on the structure and functioning of arctic tundra ecosystems. Despite recent evidence that biogeochemical and microbial dynamics during the non-growing season ...
Diatom Community Responses to Water Quality Improvements in Lakes Recovering From Acidification and Metal-Contamination Near Wawa, Ontario, Canada: a Paleolimnological Perspective
(2009-04-30)
In response to sulphur dioxide emission reductions in North America and Europe, there has been a recent shift in research focus towards understanding ecosystem recovery. Evidence for reversibility in the effects of ...
Examination of Metal Contamination within the UNESCO Designated Rideau River Waterway
(2009-09-27)
The Rideau River Waterway, also known as the Rideau Canal, is a constructed navigation channel that links Ottawa to Kingston, Ontario. Opened in 1832, it was designated a Canadian Heritage Site in 2003 and a UNESCO World ...
Making Sure Hungry Plants Get Fed: The Dual-Targeted Purple Acid Phosphatase Isozyme AtPAP26 is Essential for Efficient Acclimation of Arabidopsis Thaliana to Nutritional Phosphate Deprivation
(2009-11-18)
Acid phosphatases (APases; E.C. 3.1.3.2) catalyze the hydrolysis of phosphate (Pi) from Pi monoesters and anhydrides within the acidic pH range. Induction of intracellular and secreted purple acid phosphatases (PAPs) is a ...
Characterizing the leaf size / number trade-off at different scales
(2009-10-29)
A novel interpretation of leaf mass variation in plants has been recently proposed based on its relationship with variation in leafing intensity – number of leaves produced per unit remaining above-ground dry mass. It is ...
Sensory exploitation in a sit-and-wait predator: Exploring the functions of stabilimenta in the banded garden spider, Argiope trifasciata
(2009-09-28)
Attracting prey by exploiting a visual sensory bias is a common theme in stationary predators across many taxa, particularly for obligate ambush predators, such as orb-weaving spiders, because they construct complex prey ...
Shrub expansion in the low Arctic: The influence of snow and vegetation feedbacks on nitrogen cycling
(2009-09-19)
Climate change has coincided with expansion of deciduous shrub species in the Arctic. Increased deciduous vegetation in the tundra could have profound implications on regional climate, carbon balance, and biogeochemical ...
Exploring the Functional Significance of the Caenorhabditis elegans VAB-1 Eph RTK and DAF-18/PTEN Tumour Suppressor Interaction
(2009-11-18)
The Caenorhabditis elegans Eph RTK, VAB-1, has known roles in neuronal and epidermal morphogenesis as well as oocyte maturation through interaction with its ephrin ligands. In humans, Eph receptors are involved in nervous ...
Sperm Production and Variance in Sperm Quality
(2009-09-26)
An unusually high level of inter- and intraspecific variability in spermatozoa has been well documented. However, recent evidence indicates that the level of variation within spermatozoa differs markedly across taxa. In ...