Nature and Periodicity of Growth Rings in two Bangladeshi Mangrove Species
Identifieur interne : 000742 ( Main/Exploration ); précédent : 000741; suivant : 000743Nature and Periodicity of Growth Rings in two Bangladeshi Mangrove Species
Auteurs : Md. Qumruzzaman Chowdhury ; Nele Schmitz ; Anouk Verheydens ; Ute Sass-Klaassen ; Nico Koedam ; Hans BeeckmanSource :
- IAWA Journal [ 0928-1541 ] ; 2008.
Abstract
Nature and periodicity of growth rings were investigated in Sonneratia apetala and Heritiera fomes, two Bangladeshi mangrove species. From both species we collected three stem discs in the natural forest reserve of the Sundarbans. In addition, three discs were sampled from plantation- grown S. apetala trees of known age. Sanded stem discs revealed distinct growth rings but no periodic fluctuations in vessel variables (vessel density, vessel diameter, vessel grouping), which were measured at high resolution along a transect from pith to bark. The number of growth rings in plantation-grown S. apetala trees corresponded with the documented tree age, hence strongly suggesting the growth rings to be annual. Within species, the annual nature of the rings was further supported by a good match between the tree-ring series. The similar mean curves of S. apetala and H. fomes, growing at the same site in the Sundarbans, pointed to the presence of an external factor influencing their growth. A combination of precipitation and temperature was suggested influencing substrate salinity and phenological events. It became evident that tree-ring research in combination with the analysis of vessel patterns is a valuable tool to further investigate the complex interactions between tree growth and site ecology in mangrove forests.
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DOI: 10.1163/22941932-90000185
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From both species we collected three stem discs in the natural forest reserve of the Sundarbans. In addition, three discs were sampled from plantation- grown S. apetala trees of known age. Sanded stem discs revealed distinct growth rings but no periodic fluctuations in vessel variables (vessel density, vessel diameter, vessel grouping), which were measured at high resolution along a transect from pith to bark. The number of growth rings in plantation-grown S. apetala trees corresponded with the documented tree age, hence strongly suggesting the growth rings to be annual. Within species, the annual nature of the rings was further supported by a good match between the tree-ring series. The similar mean curves of S. apetala and H. fomes, growing at the same site in the Sundarbans, pointed to the presence of an external factor influencing their growth. A combination of precipitation and temperature was suggested influencing substrate salinity and phenological events. It became evident that tree-ring research in combination with the analysis of vessel patterns is a valuable tool to further investigate the complex interactions between tree growth and site ecology in mangrove forests.</div></front></TEI><affiliations><list></list><tree><noCountry><name sortKey="Beeckman, Hans" sort="Beeckman, Hans" uniqKey="Beeckman H" first="Hans" last="Beeckman">Hans Beeckman</name><name sortKey="Koedam, Nico" sort="Koedam, Nico" uniqKey="Koedam N" first="Nico" last="Koedam">Nico Koedam</name><name sortKey="Qumruzzaman Chowdhury, Md" sort="Qumruzzaman Chowdhury, Md" uniqKey="Qumruzzaman Chowdhury M" first="Md." last="Qumruzzaman Chowdhury">Md. 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