Forty years ago, Robert Allard and colleagues documented that the slender wild oat, Avena barbata, occurred in California as two multi-locus allozyme genotypes, associated with mesic and xeric habitats. This is arguably the first example of ecotypes identified by molecular techniques. Despite widespread citation, however, the inference of local adaptation of these ecotypes rested primarily on t...

background: this study attempted to investigate traffic accident fatalities during 2004-2009 and the effect of fuel rationing on traffic accident fatalities .   materials and methods: this was a cross-sectional study on available data of all traffic accident fatalities in fars province, iran, during 2004-2009. to identify and fit the best model, various instruments, including the autocorrelatio...

Blubber biopsy samples from eastern North Pacific killer whales Orcinus orca were analyzed for fatty acids, carbon and nitrogen stable isotopes and organochlorine contaminants. Fatty acid profiles were sufficiently distinct among the 3 reported ecotypes (‘resident,’ ‘transient’ or ‘offshore’) to enable individual animals to be correctly classified by ecotype and also by mitochondrial DNA (mtDNA...

Pika species generally fall into two ecotypes, meadow-dwelling (burrowing) or talus-dwelling, a classification that distinguishes a suite of different ecological, behavioral, and life history traits. Despite these differences, little morphological variation has previously been documented to distinguish among ecotypes. The aim of this study was to test whether postcranial features related to bur...

A major challenge for plants in a rapidly changing climate is to adapt rising temperatures. Some temperature conditions by generating an epigenetic memory that can be transmitted both meiotically and mitotically. Such memories may increase phenotypic variation global warming provide time adaptation occur through classical genetic selection. The goal of this study was understand how warmer exper...

Ostreococcus, the smallest known marine picoeukaryote, includes lowand high-light ecotypes. To determine the basis for niche partitioning between Ostreococcus sp. RCC809, isolated from the bottom of the tropical Atlantic euphotic zone, and the lagoon strain Ostreococcus tauri, we studied their photophysiologies under growth irradiances from 15 mmol photons m22 s21 to 800 mmol photons m22 s21 wi...

different species of aphids in rapeseed fields of khuzestan province were identified and the dominant ones were determined during 2002-2004 field sampling. base upon the collected data, population fluctuations of rapeseed aphids vs. their natural enemies were assessed. also biology of the aphids, major species was studied under controlled conditions. the results showed that lipaphis erysimi (ka...