Menezes, M., Berger, U. and Worbes, M. (2003) Annual growth rings and long-term growth patterns of mangrove trees from the Bragança peninsula, North Brazil. Wetlands Ecology and Management, 11 (4). pp. 233-242. DOI

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Ring analysis was carried out on 39 Rhizophora mangle trees from two salineand one brackish forest sites on apeninsula in north Brazil. All trees showedconstant growth over their entire lifespan, however the distinctiveness of growthrings was greater in trees from the salineareas than in trees from the brackish site.The mean radial increments form a patternof three distinct groups (`fast', `medium',and `slow' growth). Although all threegrowth groups contained trees from eachstudy site, trees from the brackish and thefrequently inundated saline area presenteda significantly higher growth rate (3.3 mmy-1) than the trees growing in asaline, seldom inundated area. Radiocarbonanalysis showed that R. mangle formsannual rings in the region. The mean age ofeach forest, derived from the mean stemradius, the growth rates, and the treeaffiliation to each growth group, explainsforest's density and basal area. For thetrees from a saline area belonging to themedium growth group (mean increment 2.5 mmy-1), the cambial growth correlatessignificantly with the precipitation in thetransition months between the dry and therainy season. The slowest growing trees(1.2 mm y-1) showed a closerelationship between the ring width and thenumber of months with rainfall < 50 mm.Based on these results, we propose that thelocal abiotic factors influence theindividual growth rates but their effect onthe forest structure is modified by bioticfactors, such as neighborhoodcompetition.

Document Type: Article
Programme Area: UNSPECIFIED
Research affiliation: Social Sciences > Social-Ecological Systems Analysis
Refereed: Yes
Open Access Journal?: No
ISSN: 09234861
Date Deposited: 17 Mar 2020 13:52
Last Modified: 26 Mar 2024 13:30

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