PHOTOSYNTHESIS OF A TROPICAL CANOPY TREE, CEIBA-PENTANDRA, IN A LOWLAND FOREST IN PANAMA

被引：25

作者：

ZOTZ, G

WINTER, K

机构：

来源：

TREE PHYSIOLOGY | 1994年 / 14卷 / 11期

关键词：

CARBON BALANCE; CO2; EXCHANGE; NITROGEN; TROPICAL RAIN FOREST; WATER VAPOR EXCHANGE;

D O I：

10.1093/treephys/14.11.1291

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

Diel (24 h) courses of CO2 and water-vapor exchange of Ceiba pentandra (L.) Gaertn. (Bombacaceae) were studied under natural tropical conditions in the semi-evergreen moist forest of Barro Colorado Island, Panama. Measurements were conducted from early February 1991 (dry season), shortly after new leaves emerged, until mid-October 1991 (wet season), when leaves were shed. Rates of net CO2 uptake were significantly higher in the dry season than in the wet season, and showed a linear decrease with leaf age. Leaf nitrogen concentrations and contents also decreased with age. Our estimate of annual carbon gain (2640 g CO2 m-2 year-1 or 21 g CO2 gDw-1 year-1) is considerably higher than estimates available for temperature forest trees.

引用

页码：1291 / 1301

页数：11

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