TREE SEEDLING DEVELOPMENT IN TROPICAL DRY ABANDONED PASTURE AND SECONDARY FOREST IN COSTA-RICA

被引：83

作者：

GERHARDT, K

机构：

[1] Department of Ecological Botany, Uppsala University, Uppsala, S-751 22

来源：

JOURNAL OF VEGETATION SCIENCE | 1993年 / 4卷 / 01期

关键词：

CEDRELA-ODORATA; DROUGHT; GUANACASTE; HYMENAEA-COURBARIL; MANILKARA-CHICLE; REFORESTATION; REGENERATION; SEEDLING SURVIVAL; SWIETENIA-MACROPHYLLA; TROPICAL DRY FOREST;

D O I：

10.2307/3235736

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Development of planted seedlings of four canopy tree species in recently abandoned pastures (mown and unmown) and in ca. 40-yr old secondary dry forest in Guanacaste National Park, Costa Rica, was studied from July 1989 - June 1992. The species were the light-demanding Cedrela odorata and Swietenia macrophylla, and the shade-tolerant Hymenaea courbaril and Manilkara chicle. Seedling mortality was high and primarily correlated with dry season drought. After the first dry season, M. chicle and C. odorata showed < 5 % survival in the pasture and 20 % in the forest, but after 3 yr survival had decreased to 3% in all plots. Survival of S. macrophylla was highest in the mown pasture (45 % after 3 yr) and lowest in the forest (10 %). For H. courbaril, survival was 40 - 55 % under all three conditions. Growth rates were low, with a height increment of < 15 cm/yr, possibly due to low precipitation in 1990 and 1991. All species grew taller in the pasture than in the forest. Differences in soil depth, texture and drainage appeared to contribute to variation in the results both within and between plots. Herbivory contributed to the lower survival of C. odorata and S. macrophylla in the forest.

引用

页码：95 / 102

页数：8

共 31 条

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