Abstract Oreopanax fulvus is a species endemic to the Brazilian Atlantic Forest, assessed as rare and vulnerable in states of Paraná Rio Grande do Sul, respectively. This adverse situation requires conservation actions that must be supported by understanding its autecology. We aimed identify phenological patterns O. populations from two Araucaria Rainforest remnants Paraná. Monthly phenology mo...

The article presents studies related to the evaluation of reaction cationic proteins neutrophil granulocytes as markers environmental impact on animal body example carnivores (dogs). As is known, neutrophils are one first lines defense macroorganism against many impacts, such pollution by various products anthropogenic activity, bacterial and viral infections, etc. Therefore, taking into accoun...

We studied the autecology and population status of beargrass (Xerophyllum tenax (Pursh) Nutt.) on the Olympic Peninsula of Washington State, focusing in the Olympic National Forest (ONF). Objectives were to: (1) define and describe beargrass habitat types in the ONF through an exploratory field study, and (2) determine whether beargrass populations in the ONF have declined where the species was...

Previous studies in an acid-sulfate-chloride spring in Yellowstone National Park found that microbial arsenite [As(III)] oxidation is absent in regions of the spring outflow channel where H(2)S exceeds approximately 5 microM and served as a backdrop for continued efforts in the present study. Ex situ assays with microbial mat samples demonstrated immediate As(III) oxidation activity when H(2)S ...

A novel artificial microcosm containing all the essential chemical components of soil, but with reduced heterogeneity and biological complexity, has been developed. Its utility for supporting realistic microbial populations was demonstrated and an example of how competing bacteria can be studied is illustrated.

The Ponto-Caspian mysid Limnomysis benedeni was first recorded in Lake Constance in summer 2006, and a stable population developed at the site of discovery. Although this mysid is common in the Rhine and Danube rivers, little is known about its ecology and impact in systems of invasion. We investigated the autecology of L. benedeni in habitatchpice and food experiments. In the habitat-choice ex...

The Pampean region is a crucial area to obtain sensitive paleoclimatic lacustrine archives due the presence of shallow environments in territory non impacted by humans until last centuries. In this study, we provide paleoecological reconstruction for ca. 700 years based on multiproxy record from Laguna Blanca Grande, Olavarría (Buenos Aires, Argentina). Our inferences, which were sedimentary pr...