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  Studies on the Role of Nitrogen Fixation in the Várzea Floodplain Forest - Preliminary Results Using the ¹⁵N Natural Abundance Method

Kreibich, H., & Kern, J. (2002). Studies on the Role of Nitrogen Fixation in the Várzea Floodplain Forest - Preliminary Results Using the ¹⁵N Natural Abundance Method. In R. Lieberei, H. Bianchi, V. Boehm, & C. Reisdorff (Eds.), Neotropical Ecosystems: Proceedings of the German-Brazilian Workshop, Hamburg 2000 (pp. 485-488). Geesthacht: GKSS-Forschungszentrum.

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 Creators:
Kreibich, H., Author
Kern, Jürgen1, Author           
Affiliations:
1Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976549              

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Free keywords: N₂ fixation; Amazonian floodplain forest; δ¹⁵N; Natural abundance model
 Abstract: In a Várzea floodplain forest, nitrogen fixation of legume-rhizobium symbioses was investigated using the ¹⁵N natural abundance method. Mean δ¹⁵N values in soil were positive and ranged from 5.0 to 5.8, average δ¹⁵N value in litter was 3.9 and therefore depleted in ¹⁵N by comparison with soil. Mean δ¹⁵N values in legumes were low by comparison with non-legumes and varied between 0.94 - 4.90. In non-legumes mean δ¹⁵N values were 3.17 - 7.79. Estimation of the proportion of nitrogen derived from atmospheric N₂ resulted in mean values of 60% Ndfa for Zygia inaequalis, 37%Ndfa for Albizia multiflora and 32% Ndfa for Pterocarpus amazonum. Legume trees showed a high inter- and intraspecific variation in their per cent nitrogen derived from atmosphere (%Ndfa), but there was no significant temporal variation of nitrogen fixation by rhizobium-legume symbioses from October 1998 to April 1999. N₂ fixation was an important source of nitrogen for nodulated legume trees and therefore might have been of certain importance for the biomass production of the forest

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Language(s): eng - English
 Dates: 2002
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 31345
Other: 2179/S 37911
 Degree: -

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Title: Neotropical Ecosystems. Proceedings of the German-Brazilian Workshop, Hamburg 2000
Place of Event: Hamburg
Start-/End Date: 2000-09-03 - 2000-09-08

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Title: Neotropical Ecosystems : Proceedings of the German-Brazilian Workshop, Hamburg 2000
Source Genre: Proceedings
 Creator(s):
Lieberei, Reinhard, Editor
Bianchi, Helmut, Editor
Boehm, Vera, Editor
Reisdorff, Christoph, Editor
Affiliations:
-
Publ. Info: Geesthacht : GKSS-Forschungszentrum
Pages: book with abstracts and CD-ROM with fulltexts Volume / Issue: - Sequence Number: - Start / End Page: 485 - 488 Identifier: ISBN: 3-00-010691-X