The effect of nutrient enrichment on growth, photosynthesis and hydraulic conductance of dwarf mangroves in Panama

Lovelock, C. E., Feller, I. C., Mckee, K. L., Engelbrecht, B. M. J. and Ball, M. C. (2004) The effect of nutrient enrichment on growth, photosynthesis and hydraulic conductance of dwarf mangroves in Panama. Functional Ecology, 18 1: 25-33. doi:10.1046/j.0269-8463.2004.00805.x


Author Lovelock, C. E.
Feller, I. C.
Mckee, K. L.
Engelbrecht, B. M. J.
Ball, M. C.
Title The effect of nutrient enrichment on growth, photosynthesis and hydraulic conductance of dwarf mangroves in Panama
Journal name Functional Ecology   Check publisher's open access policy
ISSN 0269-8463; 0269-2183; 1365-2435
Publication date 2004-02-01
Year available 2004
Sub-type Article (original research)
DOI 10.1046/j.0269-8463.2004.00805.x
Open Access Status DOI
Volume 18
Issue 1
Start page 25
End page 33
Total pages 9
Place of publication Oxford
Publisher British Ecological Society
Language eng
Subject 0602 Ecology
Abstract 1. Dwarf stands of the mangrove Rhizophora mangle L. are extensive in the Caribbean. We fertilized dwarf trees in Almirante Bay, Bocas del Toro Province, north-eastern Panama with nitrogen (N) and phosphorus (P) to determine (1) if growth limitations are due to nutrient deficiency; and (2) what morphological and/or physiological factors underlie nutrient limitations to growth. 2. Shoot growth was 10-fold when fertilized with P and twofold with N fertilization, indicating that stunted growth of these mangroves is partially due to nutrient deficiency. 3. Growth enhancements caused by N or P enrichment could not be attributed to increases in photosynthesis on a leaf area basis, although photosynthetic nutrient-use efficiency was improved. The most dramatic effect was on stem hydraulic conductance, which was increased sixfold by P and 2.5-fold with N enrichment. Fertilization with P enhanced leaf and stem P concentrations and reduced C : N ratio, but did not alter leaf damage by herbivores. 4. Our findings indicate that addition of N and P significantly alter tree growth and internal nutrient dynamics of mangroves at Bocas del Toro, but also that the magnitude, pattern and mechanisms of change will be differentially affected by each nutrient.
Keyword Ecology
Bocas Del Toro
Fertilization Experiment
Herbivory
Rhizophora Mangle
Nitrogen-use Efficiency
Rhizophora Mangle L.
Coastal Peat Swamp
Spartina-alterniflora
Gas-exchange
Avicennia-germinans
Water Transport
Plant-growth
Forests
Q-Index Code C1
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Ecology Centre Publications
Centre for Marine Studies Publications
 
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Created: Tue, 14 Aug 2007, 00:06:32 EST