Biodiversity: The Non-natives Species Versus the Natives Species and Ecosystem Functioning

Rare Species and Ecosystem Functioning

The role of diversity in the maintenance of ecosystems has been studied widely in the past decade. By correlating richness and diversity with basic ecosystem processes, these investigations lend support to the hypothesis that species diversity significantly influences ecosystem functioning and, in turn, provide support for the conservation of biodiversity. Nonetheless, the majority of these inv...

Biodiversity and ecosystem functioning: effects of the loss of salamander species richness.

The effects of species loss on ecosystem processes has attracted substantial research efforts over the last 2 decades (1, 2), partly motivated by rapid declines in global biodiversity. The value of this research to practical conservation is, however, yet limited (ref. 3, but see ref. 4), partly due to the lack of clear evidence from natural systems. In a recent study in PNAS, Rovito et al. (5) ...

Biodiversity and Ecosystem Functioning

Species diversity is a major determinant of ecosystem productivity, stability, invasibility, and nutrient dynamics. Hundreds of studies spanning terrestrial, aquatic, and marine ecosystems show that high-diversity mixtures are approximately twice as productive as monocultures of the same species and that this difference increases through time. These impacts of higher diversity have multiple cau...

Biodiversity , Species Composition and Ecosystem Function

A Comparative Study of Interactive and Interactional Metadiscourse Markers in Sales Contract Written by English Natives vs. Iranian Non-natives

This study investigated two major types of metadiscourse markers as used in typical sales contracts, written by English natives and Iranian non-natives. In so doing, 60 sales contracts were selected, 30 written by native English and 30 by Iranian non-natives. Based on Hyland and Tse’s taxonomy, the contracts were codified and classified in terms of the frequency and percentage of the interactiv...