@Article{VanLangenhove_etal2021,
author="Van Langenhove, Leandro
and Depaepe, Thomas
and Verryckt, Lore T.
and Fuchslueger, Lucia
and Donald, Julian
and Celine, Leroy
and Krishna Moorthy, Sruthi M.
and Gargallo-Garriga, Albert
and Farnon Ellwood, M. D.
and Verbeeck, Hans
and Van Der Straeten, Dominique
and Penuelas, Josep
and Janssens, Ivan A.",
title="Comparable canapy and soil free living nitrogen fixation rates in e lowland tropical forest",
journal="Science of the total environment",
year="2021",
publisher="Elsevier",
volume="754",
optkeywords="Biodiversit{\'e}",
optkeywords="Syst{\'e}matique",
optkeywords="phylog{\'e}nie",
optkeywords="taxonomie",
optkeywords="Ecologie",
optkeywords="Environnement",
optkeywords="Ecosyst{\`e}mes",
optkeywords="Biologie v{\'e}g{\'e}tale",
optkeywords="Botanique",
abstract="Biological nitrogen fixation (BNF) is a fundamental part of nitrogen cycling in tropical forests, yet little is known about the contribution made by free-living nitrogen fixers inhabiting the often-extensive forest canopy. We used the acetylene reduction assay, calibrated with 15N2, to measure free-living BNF on forest canopy leaves, vascular epiphytes, bryophytes and canopy soil, as well as on the forest floor in leaf litter and soil. We used a combination of calculated and published component densities to upscale free-living BNF rates to the forest level. We found that bryophytes and leaves situated in the canopy in particular displayed high mass-based rates of free-living BNF. Additionally, we calculated that nearly 2 kg of nitrogen enters the forest ecosystem through free-living BNF every year, 40\% of which was fixed by the various canopy components. Our results reveal that in the studied tropical lowland forest a large part of the nitrogen input through free-living BNF stems from the canopy, but also that the total nitrogen inputs by free-living BNF are lower than previously thought and comparable to the inputs of reactive nitrogen by atmospheric deposition.",
optnote="exported from refbase (http://php.ecofog.gf/refbase/show.php?record=1006), last updated on Tue, 19 Jul 2022 11:20:36 -0300",
doi="10.1016/j.scitotenv.2020.142202",
language="Anglais"
}