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Variation of leaf-level gas exchange rates and leaf functional traits of dominant trees across three successional stages in a Southeast Asian tropical forest
Tor-ngern, Pantana; Chart-asa, Chidsanuphong; Chanthorn, Wirong3,4; Rodtassana, Chadtip5; Yampum, Siriphong6; Unawong, Weerapong7; Nathalang, Anuttara8; Brockelman, Warren8; Srinoppawan, Kanchit9; Chen, Yajun10; Hasselquist, Niles J.
2021
Source PublicationFOREST ECOLOGY AND MANAGEMENT
ISSN0378-1127
Volume489Issue:xPages:-
Abstract

Deforestation has created heterogeneous patches of old-growth and secondary forests throughout Southeast Asia, posing challenges for understanding the hydrological and carbon cycles. In addition to changes in species composition, environmental conditions differ across successional stages which in turn can influence forest water use and productivity. Here, we investigated leaf-level area-based photosynthesis (Aarea) and stomatal conductance (gs) of 11 tree species dominating an old-growth (OF; >200 years), an intermediate (IF; -44 years), and a young forest (YF; -4 years) in Thailand during both the wet and dry season. Specifically, we compared Aarea and gs and assessed the sensitivity of gs to vapor pressure deficit (VPD). We also examined relationships between gas exchange parameters and key functional leaf traits, including leaf mass per area (LMA), nitrogen (N), phosphorus (P), and chlorophyll concentration. All three forests showed comparable Aarea and gs in the wet season, whereas significantly lower values were observed in IF during the dry season. All forest stages displayed similar sensitivity of gs to VPD. Among the leaf functional traits considered, LMA, N and P were significantly higher in YF compared to the other two successional stages. Our results suggested that forest succession may not influence gas exchange, rather, canopy development associated with forest stage produced the main effect. Furthermore, the young forest was the most active in resource acquisition with its high LMA and leaf nutrient concentrations, which could result in high photosynthetic rates. However, low soil water availability in YF possibly limit the gas exchange rates thereby making them similar to those in the old-growth forest. These findings highlight the potential effects of canopy characteristics inherent in successional forests on water and carbon exchanges between trees and the atmosphere and their sensitivity to atmospheric drought. These results call for the need for further studies to identify the main factors influencing forest productivity during secondary succession in the tropics, particularly in the Southeast Asian region where such information is lacking.

KeywordForest succession Functional traits Photosynthesis Stomatal conductance Tropical forests
Subject AreaForestry
DOI10.1016/j.foreco.2021.119101
Indexed BySCI
Language英语
WOS IDWOS:000636266800008
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/12236
Collection植物生理生态研究组
Affiliation1.Chulalongkorn Univ, Fac Sci, Dept Environm Sci, Bangkok 10330, Thailand
2.Chulalongkorn Univ, Environm Hlth & Social Data Analyt Res Grp, Bangkok 10330, Thailand
3.Chulalongkorn Univ, Water Sci & Technol Sustainable Environm Res Grp, Bangkok 10330, Thailand
4.Kasetsart Univ, Fac Environm, Dept Environm Technol & Management, Bangkok 10900, Thailand
5.UFZ Helmholtz Ctr Environm Res, Dept Ecol Modelling, D-04318 Leipzig, Germany
6.Chulalongkorn Univ, Fac Sci, Dept Bot, Bangkok 10330, Thailand
7.Chulalongkorn Univ, Grad Sch, Bangkok 10330, Thailand
8.Chulalongkorn Univ, Ctr Excellence Hazardous Subst Management, Bangkok 10330, Thailand
9.Natl Sci & Technol Dev Agcy, Natl Biobank Thailand, Pathum Thani 12120, Thailand
10.Dept Natl Pk Wildlife & Plant Conservat, Bangkok 10900, Thailand
11.Chinese Acad Sci, Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China
12.Hasselquist, Niles J.] Swedish Univ Agr Sci, Dept Forest Ecol & Management, S-90183 Umea, Sweden
Recommended Citation
GB/T 7714
Tor-ngern, Pantana,Chart-asa, Chidsanuphong,Chanthorn, Wirong,et al. Variation of leaf-level gas exchange rates and leaf functional traits of dominant trees across three successional stages in a Southeast Asian tropical forest[J]. FOREST ECOLOGY AND MANAGEMENT,2021,489(x):-.
APA Tor-ngern, Pantana.,Chart-asa, Chidsanuphong.,Chanthorn, Wirong.,Rodtassana, Chadtip.,Yampum, Siriphong.,...&Hasselquist, Niles J..(2021).Variation of leaf-level gas exchange rates and leaf functional traits of dominant trees across three successional stages in a Southeast Asian tropical forest.FOREST ECOLOGY AND MANAGEMENT,489(x),-.
MLA Tor-ngern, Pantana,et al."Variation of leaf-level gas exchange rates and leaf functional traits of dominant trees across three successional stages in a Southeast Asian tropical forest".FOREST ECOLOGY AND MANAGEMENT 489.x(2021):-.
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