期刊
WETLANDS ECOLOGY AND MANAGEMENT
卷 17, 期 6, 页码 585-599出版社
SPRINGER
DOI: 10.1007/s11273-009-9136-8
关键词
Allometric relationship; Biomass increment; Fast growing species; Litterfall; Pioneer mangrove; Stem analysis
资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan [16201009, 16651009]
- Twenty first century COE program of University of the Ryukyus, Japan
- Grants-in-Aid for Scientific Research [16651009, 16201009] Funding Source: KAKEN
Biomass and aboveground net primary production (ANPP) in a monospecific pioneer stand of a mangrove Kandelia obovata (S., L.) Yong were quantified. The estimated biomasses in leaves, branches, stems, roots, aboveground and total were 5.61 (3.68%), 28.8 (18.9%), 46.1 (30.2%), 71.8 (47.2%), 80.5 (52.8%) and 152 Mg ha(-1) (100%), respectively. Stem phytomass increment per tree was estimated using allometric relationships and stem analysis. Stem volume without bark of harvested trees showed a strong allometric relationship with D (0.1) (2) H (D (0.1), diameter at a height of one-tenth of tree height H) (R (2) = 0.924). Annual stem volume increment per tree showed a strong allometric relationship with D (0.1) (2) H (R (2) = 0.860). Litterfall rate ranges from 3.87 to 56.1 kg ha(-1) day(-1) for leaves and 0.177 to 46.2 kg ha(-1) day(-1) for branches. Seasonal changes of litterfall rate were observed, which showed a peak during wet season (August-September). Total annual litterfall was estimated as 10.6 Mg ha(-1) year(-1), in which 68.2% was contributed by the leaves. The ANPP in the K. obovata stand was 29.9-32.1 Mg ha(-1) year(-1), which is ca. 2.8-3.0 times of annual litterfall. The growth efficiency (aboveground biomass increment/LAI) was 5.35-5.98 Mg ha(-1) year(-1). The low leaf longevity (9.3 months) and high growth efficiency of K. obovata makes it a highly productive mangrove species.
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