the effects of dominant shrub species on soil organic matter (som), including total soil carbon (sc), total nitrogen (n) and particulate organic matter (pom) were studied in three stands differing in the type of shrub species, i.e. astragalus microcephalus (shrub), pteropyrum aucheri (shrub) and prangus uloptera (non-shrub).the stands were located in arid grasslands of north-western iran. for t...

Many studies have found that plant invasion can enhance soil organic carbon (SOC) pools, by increasing net primary production (NPP) and/or decreased soil respiration. While most studies have focused on C input, little attention has been paid to plant invasion effects on soil respiration, especially in wetland ecosystems. Our study examined the effects of Spartina alterniflora invasion on soil r...

Background Alien or non-indigenous species are now considered a major element of global environmental change (Vitousek et al. 1996; Mack et al. 2000). Invasive species pose a significant threat to many ecosystems worldwide by their direct and indirect impacts to native species and by their effects on broader scale ecological patterns and processes (Cole and Landres 1996). Biological invasions h...

Development and change in forest communities are strongly influenced by plant-soil interactions. The primary objective of this paper was to identify how forest soil characteristics vary along gradients of forest community composition in aspen-conifer forests to better understand the relationship between forest vegetation characteristics and soil processes. The study was conducted on the Fishlak...

The trial aimed at assessing the effect of frequency harvest, plant population and N.P.K fertilizer Vernonia amygdalina(Bitter leaf) was conducted Teaching Research farm, University Abuja, Nigeria. Split plot treatment arrangement fitted into a randomized complete Block Design (RCBD) with 3 replications used. Plant used were10,000,stands/ha 40,000 stands/ha 4 weeks harvest. Data collected were ...