scholarly journals Early indications of drought impacts on forests in the southeastern United States

2015 ◽  
Vol 91 (04) ◽  
pp. 376-383 ◽  
Author(s):  
Michael K. Crosby ◽  
Zhaofei Fan ◽  
Martin A. Spetich ◽  
Theodor D. Leininger ◽  
Xingang Fan
Keyword(s):  
United States ◽  
Forest Type ◽  
Southeastern United States ◽  
Forest Health ◽  
Classification And Regression Tree ◽  
Future Research ◽  
Red Oak ◽  
White Oak ◽  
Cart Analysis ◽  
Crown Dieback

In the southeastern United States, drought can pose a significant threat to forests by reducing the amount of available water, thereby stressing trees. Destructive changes in crown conditions provide the first visible indication of a problem in a forested area, making it a useful indicator for problems within an ecosystem. Forest Health and Monitoring (FHM) and Palmer's Drought Severity Index (PDSI) data from 11 states in the southeastern United States were obtained in an effort to determine the role that drought, forest type, and ecoregion have in indicating differences in crown dieback. Analyses were conducted by species groups using classification and regression tree (CART) analysis. The greatest amount of total relative crown dieback occurred in red oak (18%), followed by other hardwoods (14%), and white oak (11%). Relative crown dieback varied by forest type and ecoregion with a relationship to drought in both red oak and white oak. This information will be useful for focusing future research and modeling efforts to predict forest health conditions affected by changing climate variables.

Absorption and translocation of [14C]glyphosate in four woody plant species

1992 ◽  
Vol 22 (6) ◽  
pp. 785-789 ◽  
Author(s):  
Thomas H. Green ◽  
Patrick J. Minogue ◽  
Charles H. Brewer ◽  
Glenn R. Glover ◽  
Dean H. Gjerstad
Keyword(s):  
United States ◽  
Loblolly Pine ◽  
Woody Plants ◽  
Woody Plant ◽  
Southeastern United States ◽  
Herbicide Tolerance ◽  
Woody Species ◽  
Red Maple ◽  
White Oak ◽  
Foliar Absorption

Absorption and translocation patterns of radio-labelled glyphosate (N-(phosphonomethyl)glycine) were examined in four species of woody plants to determine mechanisms of herbicide tolerance in species common to the southeastern United States. Loblolly pine (Pinustaeda L.) and yaupon (Ilexvomitoria (L.) Ait.), both tolerant to the herbicide, absorbed significantly less glyphosate than did red maple (Acerrubrum L.) or white oak (Quercusalba L.), indicating the importance of foliar absorption as a barrier to glyphosate entry. Although herbicide absorption was similar between the sensitive white oak and the tolerant red maple, white oak accumulated more glyphosate in the roots than did red maple, indicating that translocation patterns also contribute significantly to glyphosate tolerance in some woody species.

scholarly journals State of Pine Decline in the Southeastern United States

2010 ◽  
Vol 34 (3) ◽  
pp. 138-141 ◽  
Author(s):  
Lori Eckhardt ◽  
Mary Anne Sword Sayer ◽  
Don Imm
Keyword(s):  
United States ◽  
Loblolly Pine ◽  
Southeastern United States ◽  
Forest Health ◽  
Development Program ◽  
Potential Effect ◽  
Technical Note ◽  
Environmental Research ◽  
Us Army ◽  
Pine Decline

Abstract Pine decline is an emerging forest health issue in the southeastern United States. Observations suggest pine decline is caused by environmental stress arising from competition, weather, insects and fungi, anthropogenic disturbances, and previous management. The problem is most severe for loblolly pine on sites that historically supported longleaf pine, are highly eroded, or are not managed. The purposes of this technical note are (1) to describe the symptomology and extent of pine decline in the southeastern United States; (2) to describe its connection with root disease, resource stress, and silviculture; and (3) to summarize the consensus opinion of scientists and land managers during a workshop sponsored by the US Army Strategic Environmental Research and Development Program regarding the scope of this syndrome and the best research avenues to counter its potential effect on the sustainability of southern pine forests.

scholarly journals Potential Alternative Tree Species as Substrates for Forest Farming of Log-grown Shiitake Mushrooms in the Southeastern United States

2020 ◽  
Vol 30 (6) ◽  
pp. 741-744
Author(s):  
Gregory E. Frey ◽  
Tarik Durmus ◽  
Erin O. Sills ◽  
Fikret Isik ◽  
Marcus M. Comer
Keyword(s):  
United States ◽  
Tree Species ◽  
Southeastern United States ◽  
Acer Rubrum ◽  
The United States ◽  
Financial Returns ◽  
White Oak ◽  
Suitable Alternative ◽  
Shiitake Mushrooms ◽  
Potential Alternative

Shiitake (Lentinula edodes) is an edible mushroom-producing fungus. “Natural log-grown” shiitake mushrooms are favored by consumers and are often produced by small farmers and hobbyists in the United States. The tree species most often recommended as a substrate for shiitake is white oak (Quercus alba), which has many other economic uses. We tested two strains of shiitake in log substrates of three common, low-value tree species in the southeastern United States to identify potential alternatives to white oak. We found that sweetgum (Liquidambar styraciflua) was a good substitute for white oak, both in terms of mushroom production and financial returns. Red maple (Acer rubrum) had less potential, with lower production and marginal financial returns, and ailanthus (Ailanthus altissima) was not a suitable alternative substrate. Of the two shiitake strains tested, a commercially available strain performed better than a naturalized strain that was isolated from an uninoculated log. Further research is needed to identify other potential alternative substrates and production techniques in the southeastern United States and other regions.

scholarly journals Physical and mechanical properties of clear wood from red oak and white oak

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 4960-4971
Author(s):  
Marly G. Carmona Uzcategui ◽  
R. Daniel Seale ◽  
Frederico José Nistal França
Keyword(s):  
United States ◽  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
The United States ◽  
Red Oak ◽  
Eastern United States ◽  
White Oak ◽  
Clear Wood ◽  
Quercus Spp ◽  
Eastern Half

Red oak and white oak are common names of species that grow in the eastern United States with great economic importance. This study aimed to evaluate the visual, physical, and mechanical properties of small clear wood specimens of red oak (Quercus spp.) and white oak (Quercus spp.). The experiments were carried out on defect-free specimens extracted from boards supplied by the Stairbuilders Manufacturers Association (SMA) members. The material was obtained from sawmills located in the eastern half of the United States. A total of 181 boards (90 boards of red oak and 91 boards of white oak) were submitted for tests. Compression strength was found to be higher than the values published in past studies. Red oak exhibited higher MOE and MOR values compared to white oak. The mechanical properties for red oak and white oak have not changed substantially because the average values remain in a range that is very close to the values published in the past 100 years. Thus, the values from the Wood Handbook can still be used for engineering purposes.

Assessment of Disturbances across Forest Inventory Plots in the Southeastern United States for the Period 1995–2018

2019 ◽  
Vol 66 (2) ◽  
pp. 242-255 ◽  
Author(s):  
Santosh K Ojha ◽  
Kozma Naka ◽  
Luben D Dimov
Keyword(s):  
United States ◽  
Coastal Plain ◽  
Forest Inventory ◽  
Stand Structure ◽  
Forest Type ◽  
Southeastern United States ◽  
Forest Types ◽  
Forest Inventory And Analysis ◽  
Silvicultural Treatments ◽  
Structure And Functions

Abstract Disturbances of varying frequency and intensity shape the species composition, stand structure, and functions of forests. This study assessed the frequency and distribution of disturbances caused by eight agents (insects, diseases, fire, animals, weather, other vegetation, human, and unknown) in the forests of the southeastern United States from 1995 to 2018. We used data from 88,722 inventory measurements of 33,531 plots from the USDA Forest Inventory and Analysis database to assess disturbance among different forest types and to different canopy strata. Disturbances were detected in approximately 14 percent of the plots, located mostly in pine-dominated forest types. Fire was the most frequent disturbance agent (occurring 6 percent of the time), followed by weather and animal agents. The agents that caused the highest mortality rate during the period for saplings were silvicultural treatments (8.6 percent), other vegetation (5.6 percent), and fire (4.4 percent), whereas for trees they were silvicultural treatments (9.8 percent), weather (1.9 percent) and insects (1.7 percent). The forest type that appeared to have been most affected by disturbances was longleaf–slash pine of the Coastal Plain. These results are useful for understanding the spatiotemporal distribution of disturbance events in different southeastern forest types and locations and for guiding forest management activities to mitigate potential impacts.

scholarly journals Social media privacy concerns and risk beliefs

2019 ◽  
Vol 7 (1) ◽  
pp. 1-13
Author(s):  
Johnathan Yerby ◽  
Alex Koohang ◽  
Joanna Paliszkiewicz
Keyword(s):  
United States ◽  
Social Media ◽  
Social Networking ◽  
Personal Information ◽  
Southeastern United States ◽  
Social Networking Site ◽  
Future Research ◽  
Privacy Concerns ◽  
Risk Beliefs ◽  
The Social

The purpose of this study was to investigate the link between users’ risk beliefs and social media privacy concerns (concerns users express regarding social media sites’ practices as to how they collect and use personal information). A Likert-type instrument with seven constructs, six of which described the social media privacy concerns and the seventh construct defined users’ risk beliefs, was used to collect data from students who were studying at a university in the southeastern United States. All students (N = 138) used Facebook as their major social networking site. Collected data were analyzed via multiple regression analysis. The results indicated that subjects’ risk beliefs are influenced by three social media privacy concerns (i.e., collection, error, and awareness). The Findings and their implications are discussed. Recommendations for future research are made.

Tolerance of pintoi peanut to PRE and POST herbicides

2020 ◽  
Vol 34 (6) ◽  
pp. 870-875
Author(s):  
Logan J. Martin ◽  
José Luiz C.S. Dias ◽  
Brent A. Sellers ◽  
Jason A. Ferrell ◽  
Ramon G. Leon ◽  
...  
Keyword(s):  
United States ◽  
Weed Management ◽  
Southeastern United States ◽  
Warm Season ◽  
Future Research ◽  
Herbicide Application ◽  
Forage Crop ◽  
Herbicide Treatments ◽  
Perennial Legume ◽  
Significant Injury

AbstractPintoi peanut is a warm-season perennial legume that shows promise as a forage crop for the southeastern United States, however, little is known about the proper methods of weed management during establishment for this species. The objective of this study was to determine the ability of pintoi peanut to tolerate applications of PRE and POST herbicides during the year of and year after planting. The effects of herbicide treatments on percentage of visual estimates of injury and stand counts of pintoi peanut were investigated at Ona and Marianna, FL, in 2015 and 2016. All PRE herbicides did not result in significant injury or stand reduction. Pintoi peanut’s tolerance to POST herbicides was higher when plants were emerged for at least 2 wk prior to herbicide application. Stands of pintoi peanut that were planted the previous year appear to tolerate all herbicides examined in this work, except sulfosulfuron. Results of this study indicate that at the year of planting pintoi peanut is tolerant to PRE applications of pendimethalin, imazethapyr, and imazapic. Pintoi peanut appears to tolerate applications of 2,4-D, carfentrazone, imazapic and imazethapyr the year after planting at the rates utilized in this study. Future research should evaluate the effects of multiple herbicide applications and tank-mixes to obtain satisfactory weed control and selectivity in pintoi peanut swards.

scholarly journals The Relationship between Political Orientation and Race on Modern Racism

2015 ◽  
Vol 3 (1) ◽  
pp. 67
Author(s):  
David Bryan Oxendine
Keyword(s):  
United States ◽  
Graduate Students ◽  
Southeastern United States ◽  
Ethnically Diverse ◽  
Political Orientation ◽  
Future Research ◽  
Factors Associated ◽  
Modern Racism ◽  
Regional University ◽  
The Relationship

<p>Political orientation and race have consistently found to be associated with attitudes leading to the foundational elements underpinning prejudice. This study investigates these relationships more fully in order to determine the magnitude of these relationships leading to modern racist attitudes. The research participants consisted of 225 undergraduate and graduate students at an ethnically diverse regional university in the southeastern United States. Consistent with existing literature, White participants reported greater levels of modern racist attitudes than did Non-White participants. As hypothesized, political orientation and race significantly related to modern racist attitudes. Implications for continuing future research on political orientation, race and other factors associated with modern racism.</p>

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