Document Detail

The self-thinning process in mangrove Kandelia obovata stands.
MedLine Citation:
PMID:  19005617     Owner:  NLM     Status:  MEDLINE    
The self-thinning process was monitored in crowded Kandelia obovata Sheue, Liu & Yong stands over four years. The frequency distribution of tree phytomass was an L-shape, which was kept over the experimental period. Spearman's rank correlation coefficient for phytomass decreased as the time span of the comparison became longer, a result which indicates that the rank of phytomass changes as stands grow. Death of trees resulted from one-sided competition, i.e., death occurred in lower-rank trees. Surviving trees continued to grow. Whatever the current spatial distribution of the trees, death occurred randomly and the spatial distribution gradually became close to random as stands grew. The self-thinning exponent was 1.46, which can be regarded as evidence in favor of the 3/2 power law of self-thinning. Relative growth rate, RGR, decreased in proportion to decreasing relative mortality rate, RMR, with a proportionality constant of 1.57, which was not significantly different from the slope of the self-thinning exponent. This experimental result probably justifies the assumption that the ratio of RGR to RMR in the mean phytomass-density trajectory for any self-thinning population with different densities becomes constant as the growth stage progresses.
Kangkuso Analuddin; Rempei Suwa; Akio Hagihara
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-11-13
Journal Detail:
Title:  Journal of plant research     Volume:  122     ISSN:  0918-9440     ISO Abbreviation:  J. Plant Res.     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2009-01-06     Completed Date:  2009-07-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9887853     Medline TA:  J Plant Res     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  53-9     Citation Subset:  IM    
Graduate School of Engineering and Science, University of the Ryukyus, Okinawa 903-0213, Japan.
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MeSH Terms
Plant Physiological Phenomena
Population Control
Rhizophoraceae / physiology*

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