Nitrogen use strategies of neotropical rainforest trees in threatened Atlantic Forest

Aidar, M. P. M., Schmidt, S., Moss, G., Stewart, G. R. and Joly, C. A. (2003) Nitrogen use strategies of neotropical rainforest trees in threatened Atlantic Forest. Plant Cell And Environment, 26 3: 389-399. doi:10.1046/j.1365-3040.2003.00970.x


Author Aidar, M. P. M.
Schmidt, S.
Moss, G.
Stewart, G. R.
Joly, C. A.
Title Nitrogen use strategies of neotropical rainforest trees in threatened Atlantic Forest
Journal name Plant Cell And Environment   Check publisher's open access policy
ISSN 0140-7791
Publication date 2003-03
Sub-type Article (original research)
DOI 10.1046/j.1365-3040.2003.00970.x
Volume 26
Issue 3
Start page 389
End page 399
Total pages 11
Place of publication Oxford
Publisher Blackwell Publishing Ltd
Collection year 2003
Language eng
Subject C1
270708 Conservation and Biodiversity
620301 Native forests
Abstract The characteristics of nitrogen acquisition, transport and assimilation were investigated in species of an Atlantic Forest succession over calcareous soil in south-eastern Brazil. Differences in behaviour were observed within the regeneration guilds. Pioneer species showed high leaf nitrogen contents, a high capacity to respond to increased soil nitrogen availability, a high capacity for leaf nitrate assimilation and were characterized by the transport of nitrate + asparagine. At the other end of the succession, late secondary species had low leaf nitrogen contents, little capacity to respond to increased soil nitrogen availability, low leaf nitrate assimilation and were active in the transport of asparagine + arginine. The characteristics of nitrogen nutrition in some early secondary species showed similarities to those of pioneer species whereas others more closely resembled late secondary species. Average leaf delta(15)N values increased along the successional gradient. The results indicate that the nitrogen metabolism characteristics of species may be an additional ecophysiological tool in classifying tropical forest tree species into ecological guilds, and may have implications for regeneration programmes in degraded areas.
Keyword Plant Sciences
Delta N-15
Nitrate Reductase Activity
Nitrogen Acquisition
Nitrogen Metabolism
Regeneration Strategy Guilds
Secondary Succession
Xylem Sap Nitrogen Composition
N-15 Natural-abundance
Nitrate Utilization
Plant-communities
Tropical Forest
Xylem Transport
Rain-forest
Assimilation
Australia
Soils
Photosynthesis
Q-Index Code C1

 
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Created: Tue, 14 Aug 2007, 19:07:24 EST