Soil microbial respiration beneath Stipa tenacissima L. and in surrounding bare soil
2011
Novosadova, I.,Zemedelsky Vyzkum, Troubsko (Czech Republic) | Ruiz-Sinoga, J.D.,Univesidad de Malaga, (Spain). Dept. de Geografia | Zahora, J.,Mendelova Univ., Brno (Czech Republic). Ustav Agrochemie, Pudoznalstvi, Mikrobiologie a Vyzivy Rostlin | Fiserova, H.,Mendelova Univ., Brno (Czech Republic). Ustav Biologie Rostlin
Open steppes dominated by Stipa tenacissima constitute one of the most representative ecosystems of the semi-arid zones of Eastern Mediterranean Basin (Iberian Peninsula, North of Africa). The objective of this study was to assess the effect of Stipa tenacissima on key soil microbial activities under controlled incubation conditions (basal and potential respiration). Basal and potential microbial respirations in the soils beneath Stipa tenacissima were, in general, not significantly different from bare soils. The differences were less than 10%. Significantly less ethylene produced by microbial activity in soils beneath Stipa tenacissima after the addition of glucose could indicate the dependence of rhizospheric microbial communities on available carbon compounds. It can be concluded that the soil respiration in semi-arid Mediterranean ecosystems is not necessarily associated with the patchy plant distribution and that some microbial activities characteristics can be unexpectedly homogenous.
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