Comparable canopy and soil free-living nitrogen fixation rates in a lowland tropical forest

0542415 - ÚVGZ 2022 RIV NL eng J - Článek v odborném periodiku
Van Langenhove, L. - Depaepe, T. - Verryckt, L. T. - Fuchslueger, L. - Donald, J. - Leroy, C. - Moorthy, S. M. K. - Gargallo-Garriga, Albert - Ellwood, M. D. F. - Verbeeck, H. - Van Der Straeten, D. - Penuelas, J. - Janssens, I. A.
Comparable canopy and soil free-living nitrogen fixation rates in a lowland tropical forest.
Science of the Total Environment. Roč. 754, FEB (2021), č. článku 142202. ISSN 0048-9697. E-ISSN 1879-1026
Výzkumná infrastruktura: CzeCOS III - 90123
Institucionální podpora: RVO:86652079
Klíčová slova: leaf-area index * seasonal-variation * rain-forest * phosphorus limitation * nutrient limitation * global patterns * organic-matter * montane forest * phyllosphere * molybdenum * Canopy soil * Epiphytes * Leaves * Litter * Bryophytes * n-15(2) * Terrestrial LIDAR
Obor OECD: Environmental sciences (social aspects to be 5.7)
Impakt faktor: 10.754, rok: 2021
Způsob publikování: Omezený přístup
https://reader.elsevier.com/reader/sd/pii/S0048969720357314?token=DBE8CEBE20F4E38D8EDEE67609DFD10DB3D1F96749CDBDAE11765CC5EA7BBD755C2BB238109CFFF4C721A49E5FF44AD6&originRegion=eu-west-1&originCreation=20210517111433

Biological nitrogen fixation (BNF) isa 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 N-15(2), 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 freeliving 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. (C) 2020 Elsevier B.V. All rights reserved.
Trvalý link: http://hdl.handle.net/11104/0319830