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Determinants of composition, diversity and structure in a seasonally dry forest in Myanmar
Khaing, Thiri Toe; Pasion, Bonifacio O.; Lapuz, R. Sedricke; Tomlinson, Kyle W.
2019
Source PublicationGLOBAL ECOLOGY AND CONSERVATION
ISSN2351-9894
Volume19Issue:xPages:-
AbstractSeasonally dry forest with a deciduous canopy is a widespread ecosystem in Southeast Asia. Debate continues about whether this vegetation is forest or savanna. Savannas have tree cover <60%, C-4-dominated ground vegetation, and frequent fires. Forests have tree cover >70%, C-3-dominated ground vegetation, and infrequent fires. We studied three community types previously identified in seasonally dry forests in Myanmar, High Indaing, Low Indaing (both types of deciduous Dipterocarp-dominated forest) and Mixed Deciduous Forest (usually dominated by non-Dipterocarp species). We wanted to know whether their herbaceous layer communities were also compositionally distinctive, whether their structure (% tree cover, C-4 abundance) identified them as savannas or forests, and whether they differed with respect to soil nutrients, and fire frequency. We sampled fifteen 50 m x 50 m plots thought to represent the 3 community types (5 plots of each community type). In each plot we measured basal area, abundance and richness of trees with DBH >= 5 cm, and percentage cover, abundance and richness of herbaceous layer species, and classified each species as C-3/C-4. We estimated tree cover along four 50 m line transects recording canopy openness/closure every 1 m. We pooled six 0-15 cm soil cores to estimate soil parameters (N, P, K, pH). We recorded fire frequency in each plot using MODIS fire products for 2001-2017. We found that tree, herbaceous-layer and combined compositional data generated similar community clusters. Low Indaing had open tree canopies and high abundance of C-4 plants relative to Mixed Deciduous Forest. High Indaing had a wider range of tree covers but also high C-4 abundance. Fire was common in all three communities. Low Indaing could be differentiated from Mixed Deciduous forest by soil K and P (lower for Low Indaing), with High Indaing having intermediate values. Low Indaing appears to be a type of savanna whereas Mixed Deciduous Forest is a type of forest, but with the propensity to burn. In our data, High Indaing showed characteristics of both savanna and forest. Although soils underlie the transitions between these Asian communities, they do not show the clear physiognomic boundaries observed in African and South American savanna-forest transitions. (C) 2019 The Authors. Published by Elsevier B.V.
KeywordFIRE SAVANNA BIOGEOGRAPHY VEGETATION FERTILITY DYNAMICS TRAITS WOODY SOILS
Subject AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
DOI10.1016/j.gecco.2019.e00669
Indexed BySCI
Language英语
WOS IDWOS:000477695200022
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/11444
Collection2012年后新成立研究组
Affiliation1.[Khaing, Thiri Toe
2.Pasion, Bonifacio O.
3.Lapuz, R. Sedricke
4.Tomlinson, Kyle W.] Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Ctr Integrat Conservat, Mengla 666303, Yunnan, Peoples R China
5.Univ Chinese Acad Sci, Beijing, Peoples R China
6.[Pasion, Bonifacio O.] Univ Philippines Diliman, Coll Sci, Inst Biol, Quezon City 1101, Philippines
Recommended Citation
GB/T 7714
Khaing, Thiri Toe,Pasion, Bonifacio O.,Lapuz, R. Sedricke,et al. Determinants of composition, diversity and structure in a seasonally dry forest in Myanmar[J]. GLOBAL ECOLOGY AND CONSERVATION,2019,19(x):-.
APA Khaing, Thiri Toe,Pasion, Bonifacio O.,Lapuz, R. Sedricke,&Tomlinson, Kyle W..(2019).Determinants of composition, diversity and structure in a seasonally dry forest in Myanmar.GLOBAL ECOLOGY AND CONSERVATION,19(x),-.
MLA Khaing, Thiri Toe,et al."Determinants of composition, diversity and structure in a seasonally dry forest in Myanmar".GLOBAL ECOLOGY AND CONSERVATION 19.x(2019):-.
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