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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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資料種別: 会議論文

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 作成者:
Kreibich, H., 著者
Kern, Jürgen1, 著者           
所属:
1Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976549              

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キーワード: N₂ fixation; Amazonian floodplain forest; δ¹⁵N; Natural abundance model
 要旨: 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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言語: eng - English
 日付: 2002
 出版の状態: 出版
 ページ: -
 出版情報: -
 目次: -
 査読: -
 識別子(DOI, ISBNなど): eDoc: 31345
その他: 2179/S 37911
 学位: -

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イベント名: Neotropical Ecosystems. Proceedings of the German-Brazilian Workshop, Hamburg 2000
開催地: Hamburg
開始日・終了日: 2000-09-03 - 2000-09-08

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出版物名: Neotropical Ecosystems : Proceedings of the German-Brazilian Workshop, Hamburg 2000
種別: 会議論文集
 著者・編者:
Lieberei, Reinhard, 編集者
Bianchi, Helmut, 編集者
Boehm, Vera, 編集者
Reisdorff, Christoph, 編集者
所属:
-
出版社, 出版地: Geesthacht : GKSS-Forschungszentrum
ページ: book with abstracts and CD-ROM with fulltexts 巻号: - 通巻号: - 開始・終了ページ: 485 - 488 識別子(ISBN, ISSN, DOIなど): ISBN: 3-00-010691-X