Now showing items 131-134 of 134
The ecology and evolution of tetracycline resistance
(Elsevier, 1992-09)
The use of tetracycline over the past few decades has been accompanied by a drastic increase in the frequency of tetracycline resistance in a wide range of bacterial species and genera. A diversity of resistance determinants ...
Low Genetic Variation in the Heath Hen Prior to Extinction and Implications for the Conservation of Prairie-Chicken Populations
(Kluwer Academic Publishers; Springer, 2006-02)
Low genetic variation is often considered to contribute to the extinction of species when they reach small population sizes. In this study we examined the mitochondrial control region from museum specimens of the Heath Hen ...
Soil respiration in northern forests exposed to elevated atmospheric carbon dioxide and ozone
(Springer-Verlag, 2006-02-18)
The aspen free-air CO 2 and O 3 enrichment (FACTS II–FACE) study in Rhinelander, Wisconsin, USA, is designed to understand the mechanisms by which young northern deciduous forest ecosystems respond to elevated atmospheric ...
Microclimatic changes and the indirect loss of ant diversity in a tropical agroecosystem
(Springer-Verlag, 1996-11)
Recent changes in the coffee agroecosystem of Costa Rica were used to study the mechanism of biodiversity loss in transforming agroecosystems, focusing on the ground-foraging ant community. Coffee farms are being transformed ...