Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Effects of litter manipulation on early-stage decomposition and meso-arthropod abundance in a tropical moist forest
AU - Sayer, E. J.
AU - Tanner, E. V. J.
AU - Lacey, A. L.
PY - 2006/7/1
Y1 - 2006/7/1
N2 - Differences in forest productivity due to climate change may result in permanently altered levels of litterfall and litter on the forest floor. Using experimental litter removal and litter addition treatments, we investigated the effects of increased and decreased litterfall on early-stage litter decomposition and the abundance of meso-arthropods in a moist tropical forest. Litterbags containing freshly fallen leaves of Cecropia insignis (above and below the litter on the forest floor, and with and without fungicide) and Simarouba amara, or untreated birch wood (Betula sp.) were placed in either (1) plots where all litterfall was removed monthly (L-); (2) plots where litterfall was doubled monthly (L+), or (3) control plots (CT). Litter removal significantly slowed decomposition of both species and reduced the abundance of meso-arthropods on Simarouba litter. The fungicide treatment did not reduce apparent mass loss of Cecropia leaves. The litter addition treatment accelerated the decay of birch wood, probably because of increased nutrient availability from the extra litter; but there was no change in leaf-litter decomposition or meso-arthropod abundance in the L+ treatment. After 68 days, the concentrations of nitrogen, phosphorus, potassium, and magnesium in partially decomposed Cecropia litter were higher in the L+ treatment and lower in the L- treatment. The accumulation of phosphorus and nitrogen was greater in the litter in L+ plots and lower in the L- plots while the release of potassium and magnesium from decomposing litter was lower in the L+ treatment and greater in the L- plots. Thus, differences in the quantity of litterfall affect decomposition with consequences for carbon and nutrient storage and cycling. (c) 2006 Elsevier B.V. All rights reserved.
AB - Differences in forest productivity due to climate change may result in permanently altered levels of litterfall and litter on the forest floor. Using experimental litter removal and litter addition treatments, we investigated the effects of increased and decreased litterfall on early-stage litter decomposition and the abundance of meso-arthropods in a moist tropical forest. Litterbags containing freshly fallen leaves of Cecropia insignis (above and below the litter on the forest floor, and with and without fungicide) and Simarouba amara, or untreated birch wood (Betula sp.) were placed in either (1) plots where all litterfall was removed monthly (L-); (2) plots where litterfall was doubled monthly (L+), or (3) control plots (CT). Litter removal significantly slowed decomposition of both species and reduced the abundance of meso-arthropods on Simarouba litter. The fungicide treatment did not reduce apparent mass loss of Cecropia leaves. The litter addition treatment accelerated the decay of birch wood, probably because of increased nutrient availability from the extra litter; but there was no change in leaf-litter decomposition or meso-arthropod abundance in the L+ treatment. After 68 days, the concentrations of nitrogen, phosphorus, potassium, and magnesium in partially decomposed Cecropia litter were higher in the L+ treatment and lower in the L- treatment. The accumulation of phosphorus and nitrogen was greater in the litter in L+ plots and lower in the L- plots while the release of potassium and magnesium from decomposing litter was lower in the L+ treatment and greater in the L- plots. Thus, differences in the quantity of litterfall affect decomposition with consequences for carbon and nutrient storage and cycling. (c) 2006 Elsevier B.V. All rights reserved.
KW - decomposition
KW - leaf-litter
KW - litterbag method
KW - mesofauna
KW - nutrient dynamics
KW - tropical forest
KW - DRY-SEASON IRRIGATION
KW - AIR CO2 ENRICHMENT
KW - LEAF-LITTER
KW - NUTRIENT RELEASE
KW - ATMOSPHERIC CO2
KW - EXPERIMENTAL PERTURBATIONS
KW - AMAZONIAN FOREST
KW - HAWAIIAN FORESTS
KW - NATIONAL-PARK
KW - RAIN FORESTS
U2 - 10.1016/j.foreco.2006.04.007
DO - 10.1016/j.foreco.2006.04.007
M3 - Journal article
VL - 229
SP - 285
EP - 293
JO - Forest Ecology and Management
JF - Forest Ecology and Management
SN - 0378-1127
IS - 1-3
ER -