scholarly journals Modeling the impact of thinning on height development of dominant and codominant loblolly pine trees

2006 ◽  
Vol 63 (4) ◽  
pp. 349-354 ◽  
Author(s):  
Mahadev Sharma ◽  
Michael Smith ◽  
Harold E. Burkhart ◽  
Ralph L. Amateis
Keyword(s):  
Loblolly Pine ◽  
Pine Trees ◽  
The Impact

scholarly journals Hurricane Katrina Impacts on Mississippi Forests

2008 ◽  
Vol 32 (3) ◽  
pp. 139-141 ◽  
Author(s):  
Sonja N. Oswalt ◽  
Christopher Oswalt ◽  
Jeffery Turner
Keyword(s):  
Hurricane Katrina ◽  
Loblolly Pine ◽  
Public Interest ◽  
Tree Mortality ◽  
Gulf Coast ◽  
Rapid Responses ◽  
Pine Trees ◽  
Systematic Sample ◽  
The Impact ◽  
Total Tree

Abstract Hurricane Katrina triggered public interest and concern for forests in Mississippi that required rapid responses from the scientific community. A uniform systematic sample of 3,590 ground plots were established and measured in 687 days immediately after the impact of Hurricane Katrina on the Gulf Coast. The hurricane damaged an estimated 521 million trees with more than 2.5-cm dbh and killed approximately 54 million trees statewide. Sixty-nine percent of tree mortality occurred in 17 counties in southeastern Mississippi, and 45% of trees killed were loblolly pine trees. Total tree mortality was less than 1% of the statewide population.

Invasive Pine Tree Effects on Northern Coastal Scrub Structure and Composition

2013 ◽  
Vol 6 (2) ◽  
pp. 231-242 ◽  
Author(s):  
Robert J. Steers ◽  
Susan L. Fritzke ◽  
Jen J. Rogers ◽  
James Cartan ◽  
Kaitlyn Hacker
Keyword(s):  
Species Richness ◽  
Plant Cover ◽  
Ecological Impacts ◽  
Tree Size ◽  
Basal Diameter ◽  
Monterey Pine ◽  
Pine Tree ◽  
Day Range ◽  
Pine Trees ◽  
The Impact

AbstractVegetation that becomes overtopped usually experiences a decrease in abundance or species richness. When an overtopping plant alters the physiognomy of the existing vegetation (e.g., trees invading a shrubland), ecosystem processes can also be dramatically altered. Worldwide, Monterey pine (Pinus radiata) cultivars have been planted in Mediterranean-like climates and are known to invade surrounding natural communities. Ecological impacts resulting from these invasions have been widely investigated; however, the effects from solitary pine trees on the vegetation they overtop are lacking. Furthermore, studies on the impact of P. radiata cultivars from the California floristic province, where P. radiata is native, do not exist. In coastal California, north of the present-day range of native P. radiata stands, cultivars of this species have invaded northern coastal scrub vegetation. To determine the impact of pine invasion on species richness and structure in this habitat, floristic surveys were conducted in 20 blocks that consisted of invaded and uninvaded plots. An invaded plot contained two subplots located under the canopy of an isolated pine tree, whereas a paired, uninvaded plot contained two subplots located in coastal scrub adjacent to each pine. Pine trees selected ranged in size from 2.8 to 119 cm (1.1 to 46.9 in) basal diameter. Our results demonstrate that understory native cover and species richness are negatively correlated with tree size. Understory exotic plant cover and richness of species other than P. radiata did not show any correlation with tree size, mainly because exotic plants had a very low abundance overall.

Wood density of loblolly pine trees as affected by crown thinnings and harvest age in southern Brazil

2018 ◽  
Vol 52 (2) ◽  
pp. 465-485 ◽  
Author(s):  
Mário Dobner ◽  
Juergen Huss ◽  
Mário Tomazello Filho
Keyword(s):  
Wood Density ◽  
Loblolly Pine ◽  
Southern Brazil ◽  
Pine Trees

scholarly journals ECONOMIC PERFORMANCE OF LOBLOLLY PINE STANDS IN SOUTHERN BRAZIL AS A RESULT OF DIFFERENT CROWN THINNING INTENSITIES1

2019 ◽  
Vol 43 (2) ◽  
Author(s):  
Mário Dobner Jr ◽  
Dagoberto Stein de Quadros
Keyword(s):  
Loblolly Pine ◽  
Economic Performance ◽  
Southern Brazil ◽  
Expectation Value ◽  
Economic Output ◽  
Land Expectation Value ◽  
Pine Trees ◽  
Crown Thinning ◽  
Log Price ◽  
Pinus Taeda L

ABSTRACT Approximately 1.6 million hectares of southern Brazil are cultivated with pines, and mainly with the loblolly pine (Pinus taeda L.). More than one third of the stands belong to independent log producers, whose aim is to maximize their economic results. In this study, a thinning experiment was evaluated over a production period of 30 years. The stands evaluated were submitted to three different crown thinning intensities, with an unthinned stand used as a control. The aim of the study was to evaluate economic criteria regarding realistic discount rates and production periods varying between 16-30 years. For the circumstances that were evaluated, 'extreme' and early release from competition of pruned loblolly pine trees lead to the best economic performance (land expectation value = ~36,000 US$ ha-1, i = 3% yr-1). Stands subjected to crown thinnings, independently of intensity, produced three times the economic output of unthinned and unpruned stands. Although the optimal harvest ages, according to the internal rate of return, are between 18-22 years for thinned and unthinned stands, from a long-term perspective (land expectation value) and for the current relationship between log price and size, the optimal economic performance requires that production periods are extended (to 24-26 years) from those currently practised in southern Brazil (15-20 years).

Diameter Increment and Survival Equations for Loblolly Pine Trees Growing in Thinned and Unthinned Plantations on Cutover, Site-Prepared Lands

1989 ◽  
Vol 13 (4) ◽  
pp. 170-174 ◽  
Author(s):  
Ralph L. Amateis ◽  
Harold E. Burkhart ◽  
Terese A. Walsh
Keyword(s):  
Loblolly Pine ◽  
Growth Function ◽  
Individual Tree ◽  
Competitive Position ◽  
Probability Of Survival ◽  
Diameter Increment ◽  
Annual Probability ◽  
Pine Trees ◽  
Stand Conditions

Abstract Individual tree dbh increment and survival equations were developed for predicting annual dbh growth and annual probability of survival of loblolly pine trees in thinned and unthinned plantations on cutover, site-prepared lands. The dbh increment equation predicts dbh increment froma potential dbh growth function multiplied by a modifier function. The survival equations predicts the probability of survival as a function of crown ratio and the tree's competitive position in the stand. When used together, the equations should be useful to foresters interested in predictingfuture dbh and survival values for both thinned and unthinned stand conditions. South. J. Appl. For. 13(4):170-174.

scholarly journals A Growth and Yield Model Incorporating Hardwood Competition for Natural Loblolly Pine Stands in the Georgia Piedmont

1999 ◽  
Vol 23 (3) ◽  
pp. 179-185 ◽  
Author(s):  
Stacey W. Martin ◽  
Graham H. Brister
Keyword(s):  
Loblolly Pine ◽  
Basal Area ◽  
Growth And Yield ◽  
Parameter Estimates ◽  
Yield Model ◽  
Pinus Taeda L ◽  
Projection Equations ◽  
Georgia Piedmont ◽  
The Impact ◽  
Over Time

Abstract Using 5 yr remeasurement data from even-aged natural loblolly pine (Pinus taeda L.) stands in the Georgia Piedmont, a system of growth equations was developed to project pine yield over time that accounts for hardwood competition. In this system, the increase in the proportion of hardwood basal area over time is estimated, then the projected pine basal area and trees per acre are adjusted inversely to account for this increase. The parameter estimates for this system ensure compatibility between volume prediction and projection equations and the proportion of hardwood basal area, pine basal area, dominant height, and trees per acre projection equations. The whole-stand growth and yield system developed here coupled with published merchantable yield equations allow for the evaluation of the impact of hardwoods on future stand yield and product distributions. The results indicate that the impact of hardwood competition on pine yield is substantial and occurs mainly as a reduction in sawtimber volume. South. J. Appl. For. 16(3):179-185.

scholarly journals Impact of Spring Sawfly Defoliation on Growth of Loblolly Pine Stands

2005 ◽  
Vol 29 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Boris Zeide ◽  
Lynne C. Thompson
Keyword(s):  
Loblolly Pine ◽  
Multiple Regression Model ◽  
Pine Sawfly ◽  
Multivariate Multiple Regression ◽  
Loblolly Pines ◽  
The Impact ◽  
Neodiprion Taedae Linearis ◽  
Final Harvest ◽  
Moderate Stress ◽  
Actual Loss

Abstract To estimate the impact of a single spring defoliation by loblolly pine sawfly (Neodiprion taedae linearis Ross), diameters of 3,006 loblolly pines from five locations in southeastern Arkansas were measured immediately after defoliation and two more times at 1-year intervals.The proportion of defoliation was assessed at each measurement. An insecticide was used in an attempt to prevent defoliation in subsequent years. Because tree growth depends on many factors, a multivariate multiple regression model was used to separate these effects. The model predicts thata single defoliation reduces annual diameter and volume increment by 17.4, 8.4, and 2.8% for the first, second, and third years after defoliation, respectively (the actual loss was 18.9 and 8.9% for the first 2 years). It was found that trees defoliated 20–40% actuallygrew faster than undefoliated trees. This response, called overcompensation, is a common reaction of plants to moderate stress. Potential losses from defoliation are greatest in sawtimber-sized stands between the ages of 25 and 35 years. The decision to control sawflies should take into accountstand age and time to final harvest. South. J. Appl. For. 29(1):33–39.

Seasonal Abundance, Arrival and Emergence Patterns of Predaceous Hister Beetles (Coleoptera: Histeridae) Associated with Ips Engraver Beetles (Coleoptera: Scolytidae) in Louisiana

2003 ◽  
Vol 38 (4) ◽  
pp. 612-620 ◽  
Author(s):  
William P. Shepherd ◽  
Richard A. Goyer
Keyword(s):  
Loblolly Pine ◽  
Bark Beetles ◽  
Dendroctonus Frontalis ◽  
Seasonal Abundance ◽  
Southern Pine Beetle ◽  
Visual Orientation ◽  
Sticky Traps ◽  
Emergence Patterns ◽  
Pine Beetle ◽  
Pine Trees

The most common predaceous hister beetles (Coleoptera: Histeridae) found associated with Ips engraver beetles (Coleoptera: Scolytidae) in southern Louisiana were Platysoma attenuata LeConte, P. cylindrica (Paykull), P. parallelum (Say), and Plegaderus transversus (Say). The seasonal abundance of histerids caught in flight traps coincided with Ips spp. activity in the area. Histerid adults were initially caught in sticky traps on Ips-infested loblolly pine logs 1 wk after Ips spp. attacks had begun. As a group, histerids emerged from logs in a bimodal pattern with the first peak occurring during Ips spp. emergence and a second 4 wks later. The abundance of P. parallelum and P. transversus indicates that they likely fed on bark beetles and organisms arriving later in the colonization sequence. Visual orientation appeared to play a role in attraction of histerids to logs colonized by bark beetles. Platysoma attenuata preferred vertically-positioned logs to horizontal logs, while P. parallelum was the opposite. These results suggest that some histerids may be visually attracted to horizontal silhouettes, such as pine trees that have been blown down or felled and often are infested by Ips spp. Other hister beetles may prefer vertical silhouettes, such as standing pines, which tend to be colonized by the southern pine beetle, Dendroctonus frontalis Zimmermann.

Sign in / Sign up

Export Citation Format

Share Document