The coarse root biomass of eight common tree species in subtropical evergreen forest

Estimates of belowground biomass and mineralomass are fundamental to understanding carbon and element cycling in forest ecosystems. At two sites, we measured coarse root (diameter ≥2 mm) biomass by diameter class and their mineralomass for sugar maple ( Acer saccharum Marsh.), black spruce ( Picea mariana (Mill.) BSP), and jack pine ( Pinus banksiana Lamb.) trees to relate them to stem diameter at breast height (DBH). All regressions describing coarse root biomass and nutrient content as a function of stem DBH were highly significant (r2 ≥ 0.89, P < 0.001). Root mineral element (N, P, K, Ca, Mg, and S) concentrations varied with tree species and root diameter class. Sugar maple roots had higher N, P, and S concentrations than the other two tree species. Black spruce had higher root Ca concentrations. Element concentrations increased consistently with the reduction of root diameter for the three studied species. We also found that the horizontal root extent of sugar maple was related to tree DBH. In conjunction with other studies, the relationship suggests that this tree species could tolerate a 10%–20% root loss but not losses ≥28%–34%; otherwise, sugar maple health and vigour would be compromised in the short term.

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Morph-specific correlations between floral traits in a distylous Ophiorrhiza napoensis (Rubiaceae) population in southern China

Journal of Tropical Ecology ◽

10.1017/s0266467401001535 ◽

2001 ◽

Vol 17 (5) ◽

pp. 719-728 ◽

Cited By ~ 17

Author(s):

HIROSHI KUDOH ◽

TAKASHI SUGAWARA ◽

SUGONG WU ◽

JIN MURATA

Keyword(s):

Southern China ◽

Principal Component ◽

Corolla Tube ◽

Floral Traits ◽

Evergreen Forest ◽

Tube Length ◽

Multiple Traits ◽

Floral Trait ◽

Subtropical Evergreen Forest ◽

Positive Correlations

Floral trait correlations were compared between the two flower morphs of a distylous Ophiorrhiza napoensis population in a subtropical evergreen forest at the Defu Natural Animal Preserve, Guangxi, China. Common principal component analyses indicated that overall patterns in correlations among floral traits were morph specific in the study population. Strong positive correlations (r > 0.9) between anther height and corolla-tube length were found in both morphs. Stigma height correlated positively with corolla-tube length in the long-styled morph (r = 0.843), but not in the short-styled morph (r = −0.018). Flower-morph-specific correlation suggests that natural selection by pollinators has moulded trait covariance among floral traits. Because morph-specific correlations are expressed as the patterns of within-morph variation among multiple traits, putative genes responsible for the stigma-corolla tube correlation should not link to the supergene for sex-organ reciprocity between the morphs, but their expression is limited in the long-styled morph.

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Xylem anatomical and hydraulic drought resistance characteristics of common tree species in hilly areas of North China

Acta Ecologica Sinica ◽

10.5846/stxb201910132134 ◽

2021 ◽

Vol 41 (1) ◽

Author(s):

李泽东，陈志成，曹振，车路平，刘舒文，张永涛 LI Zedong

Keyword(s):

Drought Resistance ◽

Tree Species ◽

North China ◽

Common Tree

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Temporal distance decay of similarity of ectomycorrhizal fungal community composition in a subtropical evergreen forest in Japan

FEMS Microbiology Ecology ◽

10.1093/femsec/fiw061 ◽

2016 ◽

Vol 92 (5) ◽

pp. fiw061 ◽

Cited By ~ 19

Author(s):

Shunsuke Matsuoka ◽

Eri Kawaguchi ◽

Takashi Osono

Keyword(s):

Community Composition ◽

Fungal Community ◽

Distance Decay ◽

Temporal Distance ◽

Evergreen Forest ◽

Fungal Community Composition ◽

Subtropical Evergreen Forest ◽

Ectomycorrhizal Fungal Community ◽

Distance Decay Of Similarity

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A fractal root model applied for estimating the root biomass and architecture in two tropical legume tree species

Annals of Forest Science ◽

10.1051/forest:2004027 ◽

2004 ◽

Vol 61 (4) ◽

pp. 337-345 ◽

Cited By ~ 26

Author(s):

Eduardo Salas ◽

Harry Ozier-Lafontaine ◽

Pekka Nygren

Keyword(s):

Tree Species ◽

Root Biomass ◽

Legume Tree ◽

Tropical Legume ◽

Root Model

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New insights on adaptation and population structure of cork oak using genotyping by sequencing

10.1101/263160 ◽

2018 ◽

Cited By ~ 2

Author(s):

F. Pina-Martins ◽

J. Baptista ◽

G. Pappas ◽

O. S. Paulo

Keyword(s):

Local Adaptation ◽

Tree Species ◽

Evolutionary History ◽

Genotyping By Sequencing ◽

Climatic Changes ◽

Cork Oak ◽

Ecological Modelling ◽

Local Context ◽

Evergreen Forest ◽

Local Conditions

AbstractSpecies respond to global climatic changes in a local context. Understanding this process is paramount due to the pace of these changes. Tree species are particularly interesting to study in this regard due to their long generation times, sedentarism, and ecological and economic importance. Quercus suber L. is an evergreen forest tree species of the Fagaceae family with an essentially Western Mediterranean distribution. Despite frequent assessments of the species’ evolutionary history, large-scale genetic studies have mostly relied on plastidial markers, whereas nuclear markers have been used on studies with locally focused sampling strategies. The potential response of Q. suber to global climatic changes has also been studied, under ecological modelling. In this work, “Genotyping by Sequencing” (GBS) is used to derive 2,547 SNP markers to assess the species’ evolutionary history from a nuclear DNA perspective, gain insights on how local adaptation may be shaping the species’ genetic background, and to forecast how Q. suber may respond to global climatic changes from a genetic perspective. Results reveal an essentially unstructured species, where a balance between gene flow and local adaptation keeps the species’ gene pool somewhat homogeneous across its distribution, but at the same time allows variation clines for the individuals to cope with local conditions. “Risk of Non-Adaptedness” (RONA) analyses, suggest that for the considered variables and most sampled locations, the cork oak does not require large shifts in allele frequencies to survive the predicted climatic changes. However, more research is required to integrate these results with those of ecological modelling.

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New version of the 3-PG model of biomass production for the most common tree species in European Russia

10.17537/icmbb18.47 ◽

2018 ◽

Author(s):

V.N. Shanin ◽

P.Ya. Grabarnik ◽

S.S. Bykhovets ◽

O.G. Chertov ◽

M.P. Shashkov ◽

...

Keyword(s):

Biomass Production ◽

Tree Species ◽

European Russia ◽

Common Tree

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Effect of Disturbance Regimes on Spatial Patterns of Tree Species in Three Sites in a Tropical Evergreen Forest in Vietnam

International Journal of Forestry Research ◽

10.1155/2016/4903749 ◽

2016 ◽

Vol 2016 ◽

pp. 1-16 ◽

Cited By ~ 1

Author(s):

Do Thi Ngoc Le ◽

Nguyen Van Thinh ◽

Nguyen The Dung ◽

Ralph Mitlöhner

Keyword(s):

Spatial Patterns ◽

Tree Species ◽

Interspecific Interactions ◽

Abundant Species ◽

Evergreen Forest ◽

Small Scale ◽

Forest Types ◽

Disturbance Regimes ◽

Tropical Evergreen Forest ◽

Disturbed Forest

The effects of disturbance regimes on the spatial patterns of the five most abundant species were investigated in three sites in a tropical forest at Xuan Nha Nature Reserve, Vietnam. Three permanent one-ha plots were established in undisturbed forest (UDF), lightly disturbed forest (LDF), and highly disturbed forest (HDF). All trees ≥5 cm DBH were measured in twenty-five 20 m × 20 m subplots. A total of 57 tree species belonging to 26 families were identified in the three forest types. The UDF had the highest basal area (30 m2 ha−1), followed by the LDF (17 m2 ha−1) and the HDF (13.0 m2 ha−1). The UDF also had the highest tree density (751 individuals ha−1) while the HDF held the lowest (478 individuals ha−1). Across all species, there were 417 “juveniles,” 267 “subadults,” and 67 “adults” in the UDF, while 274 “juveniles,” 230 “subadults,” and 36 “adults” were recorded in the LDF. 238 “juveniles,” 227 “subadults,” and 13 “adults” were obtained in the HDF. The univariate and bivariate data with pair- and mark-correlation functions of intra- and interspecific interactions of the five most abundant species changed in the three forest types. Most species indicated clumping or regular distributions at small scale, but a high ratio of negative interspecific small-scale associations was recorded in both the LDF and HDF sites. These were, however, rare in the UDF.

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