scholarly journals Dendroindication of ecoclimatic condition in forest remediation area within Northern Steppe of Ukraine

2019 ◽  
Vol 10 (4) ◽  
pp. 457-463
Author(s):  
Y. I. Gritsan ◽  
V. M. Lovynska ◽  
S. A. Sytnyk ◽  
A. I. Hetmanchuk
Keyword(s):  
Ring Width ◽  
Climatic Factor ◽  
Dead Trees ◽  
Values Assessment ◽  
The Difference ◽  
Earlywood Width ◽  
Flood Condition ◽  
General Ring ◽  
Climatic Signals ◽  
Tree Increment

We analyzed ring width, latewood width and earlywood width of Pinus sylvestris trees under normal and flood condition in Dnipropetrovsk region, within Northern Steppe of Ukraine. Precipitation from February to August seems to be the most stable climatic factor which influenced Scots pine growth rate and caused the difference between maximum and minimum ring width in normal conditions. Meteorological conditions were mainly associated with general ring values and earlywood width, and were less associated with latewood width values. Assessment of the effect of climatic signals on tree rings’ growth process in living and dead trees and in the normal and flood condition by analyses of correlation and response function was conducted. Average annual temperatures affected the tree growth negatively in normal conditions and tree increment positively in flood conditions. Annual precipitation was correlated positively with ring width, earlywood width series in normal conditions, but negatively with these series in flood conditions.

scholarly journals DEPENDENCE OF PINUS SYLVESTRIS WOOD STRUCTURE AND PHYSICAL PROPERTIES ON GROWTH ENVIRONMENT CONDITIONS

2001 ◽  
Vol 1 ◽  
pp. 181
Author(s):  
Kaspars Šķēle ◽  
Dace Cīrule ◽  
Anda Alksne ◽  
Jurijs Hrols
Keyword(s):  
Physical Properties ◽  
Annual Ring ◽  
Forest Type ◽  
Ring Width ◽  
Wood Properties ◽  
Annual Ring Width ◽  
Pine Wood ◽  
Growth Environment ◽  
Earlywood Width ◽  
Parameter Values

The paper considers the variation o f annual ring parameters and physical properties of wood of the pine species prevailing in Latvia’s forests, depending on the forest type (bog-land, vacciniosa) and the growth region in Latvia (Vidzeme, Latgale). Wood samples were taken from the stem butt-end, the middle and 3 A o f the height, in its sapwood or core part. An average annual ring width, latewood and earlywood width in the year ring, the percentage of latewood in the annual ring, wood density in oven-dry state (0), tangential swelling (tg) and radial swelling (rad) o f wood, as well as volume swelling (v) and swelling anisotropy coefficient (k) o f wood were determined for the samples. A comparison of these data shows that, in the majority of cases, the indices for the wood of pines grown in vacciniose have higher values, which suggests the advantage of pine wood over the bog-land pine wood. In its turn, no unambiguous distinctions between the parameter values for pine wood o f Latgale and Vidzeme origin were found, although the pine wood of Vidzeme origin had a somewhat higher indices. It may be concluded that the greatest impact on the leading pine wood properties is caused by the forest types regarded herewith, and not the belonging o f the pine wood site to its different growth regions in Latvia.

Comparative study of mangrove recruitment in oil deforested areas in Guimaras, Philippines

2017 ◽  
Vol 2017 (1) ◽  
pp. 2369-2388
Author(s):  
Abner P. Barnuevo ◽  
Resurreccion B. Sadaba
Keyword(s):  
Oil Spill ◽  
Large Scale ◽  
Long Term Effects ◽  
Natural Recovery ◽  
Recovery Processes ◽  
Recovery Potential ◽  
Dead Trees ◽  
The Difference ◽  
Persistent Disturbances ◽  
Mangrove Planting

ABSTRACT The MT Solar I oil spill that released over 2 million liters of bunker C oil in Guimaras in August 2006 affected mangrove forest in varying degrees from acute damages, sublethal stresses and long term effects. Although the incident caused only <1 ha deforestation, large scale mangrove planting has been implemented as part of response initiatives without inference to scientific assessment of the natural recovery potential of the damaged habitat. The response and intervention in the aftermath of the oil spill primarily involved planting mangroves. This study assessed the mangrove recruitment and colonization in two deforested mangrove areas in Guimaras, Philippines and evaluated whether replanting was necessary as part of intervention. Results on reconstructed age extrapolated from the internodal index showed that recruitment started to take place one and two years after the spill in Site 1 (3.33% of tagged wildings) and Site 2 (11.67%) respectively. However, the wilding establishment in the former site was impaired in the succeeding years and maintained at very low numbers (0.07–0.15 m−2) whereas wilding establishment was high in Site 2 (2.19–3.31 per m−2). The difference between sites is statistically significant (P<0.0001). The marked difference between sites is attributed to the prevailing interventions and persistent disturbances. The extraction of dead trees and downed wood in Site 1 impaired the progress of recovery and was further compounded by persistent disturbances brought by the socioeconomic activities, whereas, non-intervention in Site 2 favored the progress of natural recovery. Eight years after the incident, the colonizers in Site 2 were already reproductively mature as some already developed flowers. This study highlighted the capacity of mangroves to recover from perturbations as long as the geomorphological features of the habitats are not altered. The large-scale mangrove planting implemented in the affected areas is deemed unnecessary given that one year after the incident recruitment started to progress. Thus, future oil spill responses and interventions should carefully assess the natural recovery processes of the impacted areas first, before proceeding to large scale mangrove planting programs. Otherwise, the good intentions of implementing faster recovery of mangroves and other impacted habitats may be considered a waste of public funds and a futile effort vis-à-vis practicality.

Wood density of western hemlock: effect of ring width

1994 ◽  
Vol 24 (3) ◽  
pp. 638-641 ◽  
Author(s):  
Jeffrey D. DeBell ◽  
John C. Tappeiner II ◽  
Robert L. Krahmer
Keyword(s):  
Growth Rate ◽  
Wood Density ◽  
Growth Rates ◽  
Ring Width ◽  
Western Hemlock ◽  
X Ray ◽  
Breast Height ◽  
Latewood Density ◽  
Earlywood Width ◽  
Average Wood

Wood density of western hemlock (Tsugaheterophylla (Raf.) Sarg.) was determined by X-ray densitometry of strips from breast-height samples consisting of rings 20–24 from the pith. Ring parameters were averaged over the 5 years for each strip. Wood density was negatively correlated with radial growth rate. Average wood density dropped from 0.47 to 0.37 g/cm3 as average ring width increased from 2 to 8 mm. Wood density decreased at higher growth rates primarily because earlywood width increased while latewood width remained the same; as a result, percentage of latewood decreased. Earlywood density decreased slightly at higher growth rates, but latewood density was not significantly related to growth rate.

Wood Structure and Growth Ring Width of Vital and Non-Vital Douglas Fir (Pseudotsuga Menziesii) from a Single Stand in the Netherlands

IAWA Journal ◽  
1986 ◽  
Vol 7 (4) ◽  
pp. 309-318 ◽  
Author(s):  
Ingrid de Kort
Keyword(s):  
Growth Rate ◽  
Growth Ring ◽  
Ring Width ◽  
Douglas Fir ◽  
Wood Structure ◽  
Growth Reduction ◽  
External Appearance ◽  
Dead Trees ◽  
Growth Ring Width ◽  
C 50

A comparison was made of diameter growth and wood structure in 26 trees of Douglas fir of different vitality cJasses in a decJining, c. 50- years old stand in De Peel (southeastern Netherlands). Ring width patterns agree cJosely but not perfectly with vitality cJasses as estimated by external appearance of the crown. The 'diseased' vitality cJasses all show growth reductions over the last 20 to 30 years. In the most diseased cJass no wood had been formed at all at the stern base over the last 4 to 10 years. The onset of growth reduction may be connected with the effect of air pollution in the last 40 to 50 years. The most striking result was the inverse relationship between growth rate in the first 10 to 15 years of growth, and growth rate in the last decades: all trees which are healthy at present showed slow radial growth when young, and all diseased to dead trees exhibited fast growth in their youth.

scholarly journals Climatic signals extracted from ring-width chronologies of Scots pines from the northern, middle and southern parts of the boreal forest belt in Finland

Silva Fennica ◽  
2000 ◽  
Vol 34 (4) ◽  
Author(s):  
Markus Lindholm ◽  
Hannu Lehtonen ◽  
Taneli Kolström ◽  
Jouko Meriläinen ◽  
Matti Eronen ◽  
...  
Keyword(s):  
Boreal Forest ◽  
Ring Width ◽  
Forest Belt ◽  
Climatic Signals

Chronology development and climate response analysis of different New Zealand pink pine (Halocarpus biformis) tree-ring parameters

1998 ◽  
Vol 28 (4) ◽  
pp. 566-573 ◽  
Author(s):  
Limin Xiong ◽  
Naoki Okada ◽  
Takeshi Fujiwara ◽  
Sadaaki Ohta ◽  
Jonathan G Palmer
Keyword(s):  
New Zealand ◽  
Tree Ring ◽  
Ring Width ◽  
Response Analysis ◽  
Data Series ◽  
Climate Response ◽  
Climate Data ◽  
Local Climate ◽  
Latewood Density ◽  
Earlywood Width

Seven different tree-ring parameters (total ring width, earlywood width, latewood width, maximum latewood density, minimum earlywood density, average earlywood density, and average latewood density) were obtained from pink pine (Halocarpus biformis Hook.) at one chronology site in New Zealand (NZ). The chronologies were analyzed individually and then compared with each other. The relationships between the different tree-ring parameters and climate data (NZ average and local climate data) are also presented. There were more significant climate response functions in the NZ national average climate series than that of local climate data series. Earlywood-related parameters (earlywood width, minimum density, and average earlywood density) were more sensitive to climate than those of latewood. Temperature during the NZ growth season (November-March) was found to be the most strongly related to tree growth. This study demonstrates that the use of both ring width and ring density data can increase the climate information obtained from ring widths and should lead to improved paleoclimate reconstructions in New Zealand.

The influence of drought on red oak group species growth and mortality in the Missouri Ozarks

1995 ◽  
Vol 25 (7) ◽  
pp. 1119-1127 ◽  
Author(s):  
Michael A. Jenkins ◽  
Stephen G. Pallardy
Keyword(s):  
Growth Rate ◽  
High Mortality ◽  
Ring Width ◽  
Basal Area ◽  
Lower Mortality ◽  
Red Oak ◽  
Severe Drought ◽  
Area Index ◽  
Dead Trees ◽  
Group Species

The effects of drought on growth of red oak group species were studied by examining basal area increment and ring width index patterns of dominant Quercuscoccinea Muenchh. (scarlet oak) and Quercusvelutina Lam. (black oak) trees sampled in 1990–1991 on 62 continuous forest inventory plots located across the southeastern Missouri Ozark Mountains. Trees of both species were older on plots that had suffered high mortality and showed post-1979 reductions in growth rate compared with trees growing on low-mortality plots. Quercuscoccinea trees from high-mortality plots that were dead at the time of sampling exhibited a distinct flattening in growth rate after the mid-1930s, although death did not occur for many years. Severe droughts in 1980 and 1986–1988 were associated with further accentuated reductions in growth rate in dead trees. Dead Q. coccinea that had grown on plots with lower mortality showed comparable reductions in basal area index and similar post-1979 growth patterns, but the departure in basal area index between living and dead trees occurred 2 decades later and was associated with a severe drought during 1953–1956. Additionally, dead trees on lower mortality plots grew faster than living trees for many years before the 1953–1956 drought, suggesting that rapid early growth rates may predispose trees to early death under certain conditions. The ring width index chronologies of both species growing on high- and low-mortality plots were significantly correlated with Palmer drought severity index values, further emphasizing that drought has an important influence on growth of red oak group species in the Missouri Ozarks. Analysis of first differences of ring width index chronologies indicated that severe drought had an additional persistent effect involving long-term reductions in the sensitivity of growth to climate. The results are consistent with previously hypothesized mechanisms of stand dieback and emphasize the role of severe droughts in predisposing trees to eventual death.

scholarly journals Comparison of dendroclimatic relationships using multiple tree-ring indicators (tree-ring width and δ 13 C) from Masson pine

2021 ◽  
Vol 8 (7) ◽  
pp. 201259
Author(s):  
Hongliang Gu ◽  
Jian Wang ◽  
Chao Lei ◽  
Lijuan Ma
Keyword(s):  
Tree Ring ◽  
Ring Width ◽  
Correlation Coefficients ◽  
Tree Ring Width ◽  
Subtropical China ◽  
Masson Pine ◽  
Pairwise Correlation ◽  
Climate Proxy ◽  
Earlywood Width ◽  
Three Components

This study addressed the effects of climate drivers on the tree-ring width (TRW) parameters (total ring width (TR), earlywood width (EW) and latewood width (LW)) and the total ring δ 13 C series of different wood components (whole wood, α-cellulose and holocelluose) from Masson pine in subtropical China. Pairwise correlation coefficients between three ring width parameters were statistically significant. EW and LW did not reveal much stronger climate sensitivity rather than TR. This indicated that the use of intra-annual ring width has little benefit in extracting more climate information. The mean δ 13 C series of the three components of the total ring had the strongest climate response to the July–September relative humidity ( r = −0.792 (whole wood), −0.758 (holocellulose) and −0.769 (α-cellulose)). There are no significant differences in the dendroclimatic relationships of the δ 13 C series of different wood components. Through both stationary temporal and spatial-statistical perspectives, the moisture drivers (summer/autumn) had a significant impact on three ring width parameters and three components of Masson pine. Overall, the radial growth and the δ 13 C series showed different responses to the same climate drivers during the same period. Moreover, the R-squared values of the strongest climate-proxy correlation coefficients were smaller than 50% for TRW. Consequently, the δ 13 C series of Masson pine may be a more representative climate proxy than TRW parameters for dendroclimatology in subtropical China.

scholarly journals Development of a Larix principis-rupprechtii tree-ring width chronology and its climatic signals for the southern Greater Higgnan Mountains

2018 ◽  
Vol 45 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Tongwen Zhang ◽  
Shulong Yu ◽  
Yujiang Yuan ◽  
Liping Huang ◽  
Shengxia Jiang
Keyword(s):  
Tree Ring ◽  
Ring Width ◽  
Low Frequency ◽  
Northern China ◽  
Severity Index ◽  
Drought Severity ◽  
Mountainous Area ◽  
Tree Ring Width ◽  
Large Area ◽  
Climatic Signals

Abstract Forty-one living larch (Larix principis-rupprechtii) trees collected from two sampling sites in 1310–1530 m a.s.l. in the southern Greater Higgnan Mountains in the northeastern China are used to develop a regional tree-ring width chronology. The credible chronology spans 185 years from 1830 to 2014. The results of correlation analyses indicate that moisture is the main climatic factor controlling radial growth of larch trees in this mountainous area. Spatial correlation proves that the regional tree-ring width chronology contains climatic signals representative for a large area including the eastern Mongolian Plateau and Nuluerhu Mountains. A comparison between the newly developed chronology and a May–July Palmer Drought Severity Index (PDSI) reconstruction for the Ortindag Sand Land reveals similar variations, particularly in the low-frequency domain. The tree-ring records also capture a severe and sustained drying trend recorded in the 1920s across a wide area of northern China.

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