We analyzed the main trends of change in species richness plant communities after catastrophic natural (beetle outbreaks, windfalls) and anthropogenic (clear cutting) disturbances. examined dynamics structural diversity herb-dwarf scrubs layer with different reforestation technologies death spruce stands. The study similarity ordination vegetation showed proximity undamaged forest to unharveste...

Cereal-legume intercrops represent a promising way of combining high productivity and agriculture sustainability. The benefits of cereal-legume mixtures are highly affected by species morphology and functioning, which determine the balance between competition and complementarity for resource acquisition. Studying species morphogenesis, which controls plant architecture, is therefore of major in...

Broader environmental tolerance associated with mixed population of soybean (Glycine max Merr.) cultivars may increase soybean yield potential and play a significant role in yield stability. A field study was carried out to assess whether intercropping of two commonly used cultivars of soybean with different morphological characteristics may increase seed yield in Iran. A split-plot design was ...

Associate Professor of Biology, Pomona College, Claremont, California, 91711. Abstract: Changes in rodent and avian community structure were documented for 42 months following a major fire in southern California chaparral. Rodent species richness, biomass per ha, and diversity reached levels equal to, or exceeding, those in 16 to 20 year old chaparral within 15 to 24 months post-fire. Heteromyi...

Evergreen and deciduous plants are widely expected to have different impacts on soil nitrogen (N) availability because of differences in leaf litter chemistry and ensuing effects on net N mineralization (N(min)). We evaluated this hypothesis by compiling published data on net N(min) rates beneath co-occurring stands of evergreen and deciduous trees. The compiled data included 35 sets of co-occu...

nowadays green house gases such as carbon have the most effect on global climate changes that can be decreased by plant and soil carbon sequestration of rangelands. livestock grazing has high potential to decrease or increase carbon storage. so this research investigated the effects of enclosure on plant carbon storage in rangeland of enclosure (shah tappeh-chah mahmood) and no enclosure (chiro...