巴西朗多尼亚州一片热带森林中树叶、树干和细凋落物的稳定碳同位素比率

Stable carbon isotope ratio of tree leaves, boles and fine litter in a tropical forest in Rondônia, Brazil.

作者信息

Martinelli L A, Almeida S, Brown I F, Moreira M Z, Victoria R L, Sternberg L S L, Ferreira C A C, Thomas W W

机构信息

Centro de Energia Nuclear na Agricultura, Av. Centenário 303, Piracicaba, 13416-000, SP, Brazil, , , , , , BR.

Woods Hole Research Center, Woods Hole, MA 02543, USA, , , , , , US.

出版信息

Oecologia. 1998 Apr;114(2):170-179. doi: 10.1007/s004420050433.

DOI:10.1007/s004420050433

PMID:28307929

Abstract

Leaves of 208 trees were collected for isotopic analysis together with wood from 36 tree boles and 18 samples of fine litter from a terra-firme forest located at Samuel Ecological Reserve, Rondônia State, in the southwestern Amazon region. The range of δC values in leaves was from -28 to -36‰, with an average (±1 SD) of -32.1 ± 1.5‰, which was more negative than the δC values of bole samples (-28.4 ± 2.0‰) and fine litter (-28.7 ± 2.0‰). These values are within the range found for tropical and subtropical forests. Pooling the δC values for leaf samples from trees of the same height gave averages which were positively correlated with plant height at a highly significant level, with a slope of 0.06 and an intercept of -33.3‰ and a correlation coefficient r =0.70 (P<0.001).

摘要

在位于亚马逊地区西南部朗多尼亚州塞缪尔生态保护区的一片高地森林中，采集了208棵树的树叶用于同位素分析，同时还采集了36个树干的木材样本以及18个细凋落物样本。树叶的δC值范围为-28‰至-36‰，平均（±1标准差）为-32.1±1.5‰，比树干样本（-28.4±2.0‰）和细凋落物（-28.7±2.0‰）的δC值更负。这些值在热带和亚热带森林的常见范围内。将相同高度树木的树叶样本的δC值合并后得到的平均值与植株高度呈极显著正相关，斜率为0.06，截距为-33.3‰，相关系数r = 0.70（P<0.001）。