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    Author(s): JOHN K. FRANCIS
    Date: 2000
    Source: Caribbean Journal of Science, Vol. 36, No. 3-4, :346–350,
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (277 B)


    Saplings are here defined as trees having at least 1.37 m of height and no more than 5.0 cm in diameter at breast height (DBH). Saplings may contribute less than 5 percent to nearly 100 percent of the tree biomass, depending on the successional stage of a forest. Many equations to predict the biomass for smalldiameter trees in plantations and natural stands have been published (e.g., Buech and Rugg, 1989; Chaturvedi et al., 1991; Dudley, 1992; Grundy, 1995; Kahn and Pathak, 1986; Kushalapa, 1988; Ku et al., 1981; Lo¨venstein and Berliner, 1993; Pande et al., 1988; Parrotta, 1989, 1999; Tandon et al., 1988a; Tandon et al., 1988b), but prediction equations for biomass in Caribbean tree species of sapling size are few. The information available consists of equations for tree species across diameter ranges extending into sapling sizes 346 NOTES (Ovington and Olson, 1970; Parrotta, 1989; 1999, Scatena et al., 1993; Weaver and Gillespie, 1992). Because more than 200 tree species may occur in Puerto Rican and other secondary Caribbean forests, broadly applicable models are needed. Models of biomass distribution in secondary forest can be constructed, using allometric equations. Although such equations can be used to predict reserves of wood products, fuel, and other products from sapling-size woody vegetation, these models find limited use in the region. Models of carbon sequestering in tropical secondary forests are needed to help understand the contribution of carbon sequestering to the total carbon cycle. General estimates of carbon concentration in biological materials, such as C = 50 percent of biomass (Odum, 1971), can be used but actual concentrations vary by a few percent between tissues and between species and better estimates are needed. This study was undertaken to develop allometric equations to predict dry biomass and carbon in sapling-size trees of secondary forests in Puerto Rico.

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    FRANCIS, JOHN K. 2000. Estimating Biomass and Carbon Content of Saplings in Puerto Rican Secondary Forests. Caribbean Journal of Science, Vol. 36, No. 3-4, :346–350,

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