Explaining Intricate Morphometric Variability with Environmental Predictors: The Case of Species Complex.

is a genus of small evergreen and perennial shrubs that are widespread in Europe. section includes a group of three species, , , and , that have been taxonomically disputed for more than 150 years. Many morphological features have been proposed to discriminate these species.

Analysis of 11 trace elements in flight feathers of Italian Sparrows in southern Italy: A study of bioaccumulation through age classes, variability in three years of sampling, and relations with body condition.

Trace elements have been acknowledged as one of the subtlest environmental hazards in all compartments of the total environment. Enhanced by activities in the anthroposphere, they accumulate in the atmosphere, lithosphere, and hydrosphere. Eventually, trace elements can bioaccumulate or biomagnifiy in the biosphere, with harmful effects on animals occupying higher trophic levels, including humans.