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Leaf traits and ecological stoichiometry of desert dominant species across Oasis-Ecotone-Gobi in the lower reaches of Heihe River, China*(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2019 06
Page:
1-9
Research Field:
Articles
Publishing date:

Info

Title:
Leaf traits and ecological stoichiometry of desert dominant species across Oasis-Ecotone-Gobi in the lower reaches of Heihe River, China*
Author(s):
ZHANG Xiaolong12 ZHOU Jihua2 LAI Liming2 Jiang Lianhe2 ZHENG Yuanrun2** & SHI Lijiang1
1 School of Resources and Environment, Institute of Surface Processes and Ecological Environment, Shanxi University of Finance and Economics, Taiyuan 030006, China
2 Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
Keywords:
different habitats leaf traits ecological stoichiometry adaptation strategies lower reaches of Heihe River
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2019.04013
DocumentCode:

Abstract:
Plant traits are the consequences of the interaction between plant and environment, and then the study on the leaf traits and ecological stoichiometry of plants in different habitats can be conducive to reveal how plant respond to and adapt to environmental changes. In the lower reaches of Heihe river, desert community dominant species distributed in riparian oasis, oasis-Gobi ecotone and Gobi desert, were selected, and the leaf dry matter content, specific leaf area, leaf C, N, P ecological stoichiometry of the desert dominant species in different habitats in the growing season were investigated. The results showed that the average leaf dry matter content and specific leaf area of desert dominant species were 0.30±0.01, 31.19±1.75 cm2/g, respectively. The average leaf carbon (C), leaf nitrogen (N), leaf phosphorus (P), leaf C/N, leaf N/P and leaf C/P were 316.25±20.04 mg/g, 16.63±1.00 mg/g, 1.10±0.18 mg/g, 19.77±1.31, 434.64±45.88 and 22.07±2.06, respectively. Compared to the regional, national and global scales, the desert dominant species in the lower reaches of the Heihe River were characterized by lower leaf C and SLA, but higher C:P and N:P. There were significant differences in leaf traits and leaf stoichiometric traits among different habitats, and the Leaf N:P of dominant desert species in riparian oasis and oasis-Gobi ecotone were greater than 16, indicating that plants might be more limited by P and are more conservative, but the Leaf N:P of dominant desert species in Gobi desert was less than 14, indicating that plants might be more limited by N and have the strong adaptability. Our observations indicate that N and P were the limiting nutrients for desert plant growth in the growing season, compared with Gobi desert area in the lower reaches of Heihe River, the dominant desert species of riparian oasis and oasis-Gobi ecotone may be more strongly affected by phosphorus limitation, which provide some scientific basis for vegetation restoration and sustainable management in desert oasis and Gobi Desert area.

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Last Update: 2019-04-26