caa a22 4500 463209168 CHVBK 20180405153135.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s10705-007-9093-7 doi (NATIONALLICENCE)springer-10.1007/s10705-007-9093-7 Soil bio-functioning under Acacia nilotica var. tomentosa protected forest along the Senegal River [Elektronische Daten] [Aliou Faye, Saidou Sall, Jean-Luc Chotte, Didier Lesueur] Acacia nilotica var. tomentosa trees from the Diarra protected forest located in the Senegal River valley were identified for the assessment of both biological nitrogen fixation, using the natural abundance method, and soil bio-functioning parameters (nodulation, root biomass, total microbial biomass, and potential N mineralization). The presence and the genetic diversity of indigenous rhizobia nodulating A.nilotica var. tomentosa was also investigated, taking into account distance from the trunk (0, 1, 2, and 3m) and depth (0-25, 25-50, and 50-75cm). Surprisingly, no nodules on the trees root systems were found, whereas under laboratory conditions the presence of indigenous rhizobia nodulating A.nilotica var. tomentosa was demonstrated in the analyzed soils (90% of the nodules harvested on the trapped plants were occupied by the same Inter-Genic Spacer (IGS) group, IGS1). There was no significant influence of trees and/or depth on total microbial biomass and potentials of nitrogen mineralization. Some assumptions were formulated on the possible combined effect of flooding, which usually occurs annually during 4-7months, and the clayey soils in the Diara forests. Although a deeply natural nodulation of A.nilotica var. tomentosa trees by indigenous rhizobia is not excluded, but it still remains to be demonstrated. Springer Science+Business Media B.V., 2007 Acacia nilotica nationallicence Symbiotic nitrogen fixation nationallicence δ15N nationallicence Rhizobium nationallicence Soil functioning nationallicence Natural forest nationallicence PCR/RFLP nationallicence Rhizobial biodiversity nationallicence Faye Aliou Forest Department of CIRAD, UPR « Ecosystems of Plantations », Laboratoire Commun de Microbiologie (UCAD/IRD/ISRA), Dakar, Senegal aut Sall Saidou IRD UR "Carbon Sequestration and Soil Bio-functioning”, Laboratoire d'Ecologie Microbienne des Sols Tropicaux, Dakar, Senegal aut Chotte Jean-Luc IRD UR "Carbon Sequestration and Soil Bio-functioning”, Laboratoire Matiere Organique des Sols Tropicaux, Montpellier, France aut Lesueur Didier Forest Department of CIRAD, UPR « Ecosystems of Plantations », Laboratoire Commun de Microbiologie (UCAD/IRD/ISRA), Dakar, Senegal aut Nutrient Cycling in Agroecosystems Kluwer Academic Publishers 79/1(2007-09-01), 35-44 1385-1314 79:1<35 2007 79 10705 https://doi.org/10.1007/s10705-007-9093-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10705-007-9093-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Faye Aliou Forest Department of CIRAD, UPR « Ecosystems of Plantations », Laboratoire Commun de Microbiologie (UCAD/IRD/ISRA), Dakar, Senegal aut NATIONALLICENCE 700 1- Sall Saidou IRD UR "Carbon Sequestration and Soil Bio-functioning”, Laboratoire d'Ecologie Microbienne des Sols Tropicaux, Dakar, Senegal aut NATIONALLICENCE 700 1- Chotte Jean-Luc IRD UR "Carbon Sequestration and Soil Bio-functioning”, Laboratoire Matiere Organique des Sols Tropicaux, Montpellier, France aut NATIONALLICENCE 700 1- Lesueur Didier Forest Department of CIRAD, UPR « Ecosystems of Plantations », Laboratoire Commun de Microbiologie (UCAD/IRD/ISRA), Dakar, Senegal aut NATIONALLICENCE 773 0- Nutrient Cycling in Agroecosystems Kluwer Academic Publishers 79/1(2007-09-01), 35-44 1385-1314 79:1<35 2007 79 10705 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer