Do ectomycorrhizas alter leaf‐litter decomposition in monodominant tropical forests of Guyana?
- 25 November 2005
- journal article
- Published by Wiley in New Phytologist
- Vol. 169 (3), 579-588
- https://doi.org/10.1111/j.1469-8137.2005.01607.x
Abstract
This work tested the hypothesis that ectomycorrhizas (EM) of Dicymbe corymbosa alter leaf-litter decomposition and residual litter quality in tropical forests of Guyana. Mass loss of leaf litter in litter bags was determined on three occasions, in two experiments, during a 12-month period. Paired root-exclusion plots were located randomly within a D. corymbosa forest. Both D. corymbosa and mixed-species leaf litters were reciprocally transplanted into their respective forest types. Elemental analysis was performed on the residual D. corymbosa leaf litter after 1 yr. Leaf litter mass loss in the D. corymbosa forest was not influenced by EM, despite high EM colonization. Elemental analysis of D. corymbosa leaf litter residues demonstrated reduced calcium levels in the presence of EM, which were negatively correlated with EM rootlet-colonizing mass. The lack of EM effect on the litter decomposition rate, coupled with high EM colonization, suggests an important but indirect role in mineral nutrient acquisition. Lowered Ca concentration in leaf litter exposed to EM may suggest a high Ca demand by the ectotroph system.Keywords
This publication has 69 references indexed in Scilit:
- Regeneration microsites and tree species coexistence in temperate rain forests of Chiloé Island, ChileJournal of Ecology, 2003
- Role of dynamics of intracellular calcium in aluminium‐toxicity syndromeNew Phytologist, 2003
- Monodominance in the ectomycorrhizal Dicymbe corymbosa (Caesalpiniaceae) from GuyanaJournal of Tropical Ecology, 2003
- Phosphorus Limitation of Microbial Processes in Moist Tropical Forests: Evidence from Short-term Laboratory Incubations and Field StudiesEcosystems, 2002
- Ectomycorrhizal fungi and their leguminous hosts in the Pakaraima Mountains of GuyanaMycological Research, 2002
- Causes and Consequences of Monodominance in Tropical Lowland ForestsThe American Naturalist, 2001
- The structure and function of the vegetative mycelium of ectomycorrhizal plantsNew Phytologist, 1995
- The Effect of Leaf Litter on Early Seedling Establishment in a Tropical ForestEcology, 1992
- Mycorrhizas in ecosystemsCellular and Molecular Life Sciences, 1991
- The biology of mycorrhiza in the EricaceaeNew Phytologist, 1989