A threshold response in demographic isolation was apparent.
For 47.2% of the significant thresholds, a density of only ≤0.01 mines/km2 caused a threshold response.
We then present a series of virtual experiments designed to probe the controls on the threshold response.
Hillslope threshold response to storm precipitation is one such macroscale behavior observed at field sites across the globe.
These data support a paradigm of nucleation-induced signal transduction with threshold response due to cooperativity and signal amplification by polymerization.
Clay/silt ratios display a threshold response to temperature, related to the freezing point of water, but there is little response to precipitation or regolith residence time.
Diabetic rats developed a sustained decrease in withdrawal threshold response to the von Frey test within 8 weeks after a single injection of STZ (45 mg/kg, i.v).v
Under particular luminance-stimulus conditions, the Flash-ERG displays components that may reflect electrical activity originating in the proximal retina and be altered in some experimental glaucoma models (positive Scotopic Threshold response, pSTR; negative Scotopic Threshold Response, nSTR; Photopic Negative Response, PhNR; Oscillatory Potentials, OPs; multifocal ERG, mfERG).
Our results suggest a threshold response of northern flying squirrels to green-tree retention somewhere between 40%and75%5% that is likely to be influenced by the spatial pattern of retention and landscape context.
We also found that fire had long-lasting negative effects on most of the treeline plant communities and that forest contraction from 7.7 cal ka BP is likely linked to the ecosystem's threshold response to high fire frequencies.
Plausible explanations include a change in fire regime resulting from human-lit fires, a change in fire regime following extinction of megafaunal browsers, and/or a threshold response to increasing aridity.
