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Perennial Trees Associating with Nitrogen-Fixing Symbionts Differ in Leaf After-Life Nitrogen and Carbon Release

College of Natural and Applies Sciences, University of Guam, UOG Station, Mangilao, GU 96923, USA
Received: 19 July 2020 / Revised: 7 September 2020 / Accepted: 15 September 2020 / Published: 17 September 2020
Plants that enter symbiotic relationships with nitrogen (N)-fixing microbes contribute some of their N to the community through leaf litter decomposition and mineralization processes. The speed of these processes varies greatly among tree species. Mesocosm methods were used to determine the speed of N and carbon (C) release from Cycas micronesica, Intsia bijuga, and Serianthes nelsonii leaf litter. Microcosm methods were used to determine soil respiration traits in soils containing the leaf litter. The speed of leaf litter N and C release during decomposition occurred in the order C. micronesica < I. bijuga < S. nelsonii. Soil carbon dioxide efflux was increased by adding leaf litter to incubation soils, and the increase was greatest for S. nelsonii and least for C. micronesica litter. Ammonium, nitrate, total N, organic C, and total C were increased by adding litter to incubation soils, and the differences among the species converged with incubation duration. The rate of increases in available N and decreases in organic C were greatest for S. nelsonii and least for C. micronesica litter. These findings indicate that S. nelsonii litter released N and C rapidly, C. micronesica litter released N and C slowly, and the leaf economic spectrum accurately predicted the differences. View Full-Text
Keywords: cycad; Cycas micronesica; guam; Intsia bijuga; litter decomposition; Serianthes nelsonii cycad; Cycas micronesica; guam; Intsia bijuga; litter decomposition; Serianthes nelsonii
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MDPI and ACS Style

Marler, T.E. Perennial Trees Associating with Nitrogen-Fixing Symbionts Differ in Leaf After-Life Nitrogen and Carbon Release. Nitrogen 2020, 1, 111-124. https://0-doi-org.brum.beds.ac.uk/10.3390/nitrogen1020010

AMA Style

Marler TE. Perennial Trees Associating with Nitrogen-Fixing Symbionts Differ in Leaf After-Life Nitrogen and Carbon Release. Nitrogen. 2020; 1(2):111-124. https://0-doi-org.brum.beds.ac.uk/10.3390/nitrogen1020010

Chicago/Turabian Style

Marler, Thomas E. 2020. "Perennial Trees Associating with Nitrogen-Fixing Symbionts Differ in Leaf After-Life Nitrogen and Carbon Release" Nitrogen 1, no. 2: 111-124. https://0-doi-org.brum.beds.ac.uk/10.3390/nitrogen1020010

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