biodiversity plays a crucial role in stability and productivity of natural ecosystem. the main goal of this research was to classify ecological groups in steppe rangeland and investigate their relationships with plant diversity indices. therefore, fifty different land unit tracts (lut) were identified in khod-neuk basin, yazd province, iran, in 2010. vegetation and soil samples were taken in th...

The mixture of production and ad-hoc aspects in organizational work is a ubiquitous phenomenon which potentially occurs on all levels of detail in a workflow. In this paper I first describe how this problem is addressed in the Object-oriented Activity Support Model. The model supports the manual modifications of the subactivity tree in collaboration with a workflow engine, and it supports the m...

The question in the title, first raised by Goldman and Donaldson, was partially answered by Reznikov. We give a complete answer, as follows: if G is both a (closed) 3-manifold group and a Kähler group, then G must be finite.

Although soil and rhizosphere microbiomes in highly saline environments have been well-studied, the role of salinity ecological processes affecting endophyte colonization persistence remain largely unclear halophytic plants. The present study sampled young mature plants halophyte Suaeda salsa from 42 sites Yellow River Delta, China that varied salinity. Soil physicochemical properties, root lea...

Biodiversity plays a crucial role in stability and productivity of natural ecosystem. The main goal of this research was to classify ecological groups in steppe rangeland and investigate their relationships with plant diversity indices. Therefore, fifty different Land Unit Tracts (LUT) were identified in Khod-Neuk basin, Yazd province, Iran, in 2010. Vegetation and soil samples were taken in th...