A Method to Measure Radial Incremenf in Tropical Trees

IAWA Journal ◽  
1989 ◽  
Vol 10 (2) ◽  
pp. 147-154 ◽  
Author(s):  
Takayoshi Shiokura
Keyword(s):  
Tropical Trees ◽  
Natural Forest ◽  
Radial Increment ◽  
Forest Trees ◽  
Breast Height ◽  
East Kalimantan ◽  
Iriomote Island ◽  
Mangrove Trees

Radial increment was studied in natural forest trees in East Kalimantan, Indonesia, and in mangrove trees in Thailand and on Iriomote Island (Japan). Nails were driven into the trunk at breast height. Barrier zones fonned in response were located after felling of the tree, and the amount of wood fonned subsequent to nailing was measured. Thanks to the distinctness of the cambial response to nailing, this method appears very effective for measuring radial increment in tropical trees. The following results were obtained:

scholarly journals Lightning Damage Facilitates Beetle Colonization of Tropical Trees

2020 ◽  
Author(s):  
Brady P Parlato ◽  
Evan M Gora ◽  
Stephen P Yanoviak
Keyword(s):  
Population Dynamics ◽  
Tropical Forest ◽  
Forest Ecosystems ◽  
Tropical Trees ◽  
Pine Forests ◽  
Forest Trees ◽  
Beetle Population ◽  
Tree Diameter ◽  
Crown Dieback ◽  
The Relationship

Abstract Lightning is a common agent of disturbance in many forest ecosystems. Lightning-damaged trees are a potentially important resource for beetles, but most evidence for this association is limited to temperate pine forests. Here, we evaluated the relationship between lightning damage and beetle colonization of tropical trees. We recorded the number of beetle holes on the trunks of trees from 10 strike sites (n = 173 lightning-damaged trees) and 10 matching control sites (n = 137 control trees) in Panama. The trunks of lightning-struck trees had 370% more beetle holes than control trees. The abundance of beetle holes increased with increasing total crown dieback among both control and lightning-damaged trees, and with larger tree diameter among lightning-struck trees. Beetle holes also were more abundant in trunk sections of lightning-damaged trees located directly below a damaged section of the crown. The results of this study suggest that lightning damage facilitates beetle colonization in tropical forest trees and provide a basis for investigations of the effects of lightning-caused disturbance on beetle population dynamics and assemblage structure.

Identification en forêt de chênes sessiles (Quercus petraea) présentant un angle du fil du bois intrinsèquement faible

1999 ◽  
Vol 29 (12) ◽  
pp. 1958-1965 ◽  
Author(s):  
E Guilley ◽  
M Loubère ◽  
G Nepveu
Keyword(s):  
Ring Width ◽  
Quercus Petraea ◽  
Tree Age ◽  
Radial Increment ◽  
Mixed Effect ◽  
Individual Tree ◽  
General Direction ◽  
Spiral Grain ◽  
Grain Angle ◽  
Breast Height

Grain angle on bark (angle between the general direction of bark fissures and the axis of the trunk) was assessed at the four cardinal points at breast height (1.3 m) on 82 standing sessile oaks (Quercus petraea Liebl.). After felling, wood spiral grain was measured at breast height from cambium to pith along two diametrically opposite radii. A mixed-effect model that links the tangent of grain angle to radial position (age and distance from the pith) allows to estimate two individual parameters of grain angle. In the field, nondestructive measurements of grain angle (subcortical spiral grain or spiral grain on bark) on an individual tree combined with information on the tree stand allow to estimate one of the two parameters that describes the change in grain angle for a given radial increment. This parameter is independent of mean ring width, tree age and circumference, and site characteristics; it should allow a more accurate identification and selection of standing trees with low wood spiral grain.

Expected decrease in diameter growth of even-aged red spruce

1987 ◽  
Vol 17 (3) ◽  
pp. 266-269 ◽  
Author(s):  
C. Anthony Federer ◽  
James W. Hornbeck
Keyword(s):  
New York ◽  
New England ◽  
Basal Area ◽  
Least Square ◽  
Red Spruce ◽  
Diameter Growth ◽  
Radial Increment ◽  
Breast Height ◽  
Second Growth ◽  
Stand Basal Area

Weibull functions provide close least square fits to tables for stand basal area and density versus age in even-aged, second-growth red spruce as reported by W. H. Meyer (USDA Tech. Bull. No. 142. 1929). The annual mean radial and basal area increments of the trees can be calculated from the two Weibull functions. For a stand following Meyer's tables and reaching breast height in 1915, mean tree basal area increment increases steadily to a maximum in the early 1960's and then declines; mean radial increment is constant from 1925 to 1955 and then declines rapidly. This behavior matches very closely the results from 3001 red spruce increment cores in New England and New York, which suggests that forest aging is an important cause of decreasing red spruce diameter growth.

Stem hydraulic properties and growth in lodgepole pine stands following thinning and sway treatment

2003 ◽  
Vol 33 (7) ◽  
pp. 1295-1303 ◽  
Author(s):  
Xiaodong Liu ◽  
Uldis Silins ◽  
Victor J Lieffers ◽  
Rongzhou Man
Keyword(s):  
Pinus Contorta ◽  
Hydraulic Properties ◽  
Lodgepole Pine ◽  
Specific Conductivity ◽  
Radial Increment ◽  
Total Leaf Area ◽  
Breast Height ◽  
Growing Seasons ◽  
Reduced Height ◽  
Fire Origin

The objective of this study was to explore the effects of wind-caused sway on the growth and stem hydraulic properties of fire-origin juvenile lodgepole pine (Pinus contorta Dougl. ex Loud.) stands after thinning. Nine plots were thinned and trees were treated to suppress or exacerbate sway from the wind: thinned and supported with a pole (TP), thinned with an added sail (TS), thinned control (TC), and unthinned control (UC). Terminal leader growth, radial increment, and earlywood and latewood widths at breast height were measured for the last six growing seasons. The specific hydraulic conductivity of stems was measured. The results showed that thinning increased diameter growth and reduced height growth and slenderness coefficient (particularly for trees with added sails) compared with the unthinned control. Trees from thinned stands had reduced specific conductivity compared with the trees from unthinned controls, suggesting that tree bending caused functional damage to sapwood. Specific conductivity was 1.36 × 10–5, 1.06 × 10–5, 0.96 × 10–5, and 0.83 × 10–5 m·s–1 in UC, TP, TC, and TS treatments, respectively. Trees from thinned stands, however, increased their total leaf area in the years following thinning.

scholarly journals Comparison of Shoot Water Potential in Plantation and Natural Forest Trees of Haloxylon ammodendron (C.A.Mey) Bunge ex Fenzl Desert Region, Mongolia

2021 ◽  
Author(s):  
Enkhchimeg Tsedensodnom ◽  
Ser-Oddamba Byambadorj ◽  
Narantugs Dulamsuren ◽  
Khaulanbek Akhmadi ◽  
Batkhuu Nyam-Osor
Keyword(s):  
Water Potential ◽  
Natural Forest ◽  
Forest Trees ◽  
Haloxylon Ammodendron ◽  
Desert Region

scholarly journals Radial growth trends of fir (Abies alba Mill.), beech (Fagus sylvatica L.) and pine (Pinus sylvestris L.) in the Świętokrzyski National Park (Poland)

2019 ◽  
Vol 48 (No. 9) ◽  
pp. 377-387 ◽  
Author(s):  
R. Podlaski
Keyword(s):  
Pinus Sylvestris ◽  
Fagus Sylvatica ◽  
Radial Growth ◽  
National Park ◽  
Abies Alba ◽  
Radial Increment ◽  
Growth Trends ◽  
Breast Height ◽  
Świętokrzyski National Park ◽  
Fagus Sylvatica L

The objectives of this study are to determine a trend of the radial growth at breast height (b.h.) and to compare the radial growth of trees of younger and older generations in the XX century for fir (Abies alba Mill.), beech (Fagus sylvatica L.) and pine (Pinus sylvestris L.) in the Świętokrzyski National Park. In the investigated area fir, 41 to 200–300 years of age at breast height, gradually regenerated its radial growth after a very strong decline during 1971–1990, and most likely the process of vitality reduction and death of its stands of various age is slowly coming to an end. Pine showed a systematic decrease in the radial increment during 1885–1994, and there were no distinct symptoms indicating a change of this unfavourable trend. Beech showed no significant decrease in the radial increment during 1885–1994. In the Świętokrzyski National Park the differences in the radial growth between younger and older generations were noticeable only in the case of beech. The radial growth of trees of different ages was very similar in the case of fir and pine.  

scholarly journals Taxonomic Diversity of Lianas in Tropical Forests of Northern Eastern Ghats of Andhra Pradesh, India

2014 ◽  
Vol 6 (1) ◽  
pp. 59-65 ◽  
Author(s):  
Maradana TARAKESWARA NAIDU ◽  
Owk ANIEL KUMAR ◽  
Malleboyina VENKAIAH
Keyword(s):  
Tropical Forests ◽  
Forest Dynamics ◽  
Andhra Pradesh ◽  
In Situ Conservation ◽  
Taxonomic Diversity ◽  
Habitat Specialization ◽  
Eastern Ghats ◽  
Forest Trees ◽  
Breast Height

Lianas are important in forest ecosystem and strongly influence the forest dynamics and diversity. Lianas are common in the tropical moist deciduous and rain forests, which are competing with other forest trees. Little information is known on the habitat specialization in tropical lianas diversity and the root causes for variation among forests in liana species composition. A total of 170 liana species (≥ 1.5 cm girth at breast height) representing 109 genera and 43 families were reported in 5×5 m quadrate samples along with their climbing modes in the tropical forests of northern Eastern Ghats of Andhra Pradesh, India. A total of 210 grids were sampled in study area and reported that Convolvulaceae was the dominant family with 23 species followed by Papilionaceae, 22 species and Asclepiadaceae, 19 species and Ipomoea was the largest genera. Woody lianas were dominated by 128 species and these are classified into six climbing modes consisting in stem climbers (53.5%) that were the most predominant followed by stragglersunarmed (14.7%), stragglers armed and tendril climbers (13.5% each), root climbers (2.9%) and hook climbers (1.8%). The most dominant liana species in the northern Eastern Ghats were Acacia sinuata and Bauhinia vahlii. The results of this investigation suggests that better management and protection is an important for in situ conservation of liana diversity and involving local people is emphasized.

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