caa a22 4500 606218262 CHVBK 20210128101111.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s11104-014-2324-1 doi (NATIONALLICENCE)springer-10.1007/s11104-014-2324-1 The influence of seasonality and species effects on surface fine roots and nodulation in tropical legume tree plantations [Elektronische Daten] [Maria Gei, Jennifer Powers] Background: Fine roots comprise a dynamic carbon pool in forests. Legumes, widespread in the tropics, have a specialized strategy of nitrogen acquisition. However, the belowground dynamics of this group are poorly understood. Scope: We studied the seasonal and spatial variation in surface fine root mass (FRM) and nodulation over 2years in plantations of four legume species (Dalbergia retusa, Enterolobium cyclocarpum, Gliricidia sepium, Leptolobium panamense) in a dry forest in Costa Rica. We measured soil moisture, FRM, and nodule mass at 2 soil depths (0-15 and 15-30cm) and at 2 distances from the tree bole (1 and 2m). Mean FRM per species ranged from 10 to 17gm−2 during the dry season to 86-116gm−2 the following wet season. Species differed in belowground foraging strategies: G. sepium and L. panamense had ~41% more roots in the surface layer, but in D. retusa plantations, 44.3% more roots were in the deeper layer. In G. sepium and L. panamense, nodulation fluctuated seasonally, while the other species did not nodulate. Conclusions: FRM varied in synchrony with rainfall and responded to interannual precipitation anomalies. Thus, FRM is a sensitive component of the forest carbon pool, vulnerable to shifts in species composition and climate regimes. Springer International Publishing Switzerland, 2014 Fine roots nationallicence Nodulation nationallicence Seasonality nationallicence Legumes nationallicence Tropical dry forests nationallicence Gei Maria Department of Ecology Evolution and Behavior, University of Minnesota, 1987 Upper Buford Circle, 100 Ecology Building, 55108, St. Paul, MN, USA aut Powers Jennifer Departments of Ecology Evolution and Behavior and Plant Biology, University of Minnesota, St. Paul, MN, USA aut Plant and Soil Springer International Publishing 388/1-2(2015-03-01), 187-196 0032-079X 388:1-2<187 2015 388 11104 https://doi.org/10.1007/s11104-014-2324-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-014-2324-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gei Maria Department of Ecology Evolution and Behavior, University of Minnesota, 1987 Upper Buford Circle, 100 Ecology Building, 55108, St. Paul, MN, USA aut NATIONALLICENCE 700 1- Powers Jennifer Departments of Ecology Evolution and Behavior and Plant Biology, University of Minnesota, St. Paul, MN, USA aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 388/1-2(2015-03-01), 187-196 0032-079X 388:1-2<187 2015 388 11104