scholarly journals Contemporary Fire Regimes Provide a Critical Perspective on Restoration Needs in the Mexico-United States Borderlands

2020 ◽  
Vol 13 ◽  
pp. 117862212096919
Author(s):  
Miguel L Villarreal ◽  
José M Iniguez ◽  
Aaron D Flesch ◽  
Jamie S Sanderlin ◽  
Citlali Cortés Montaño ◽  
...  
Keyword(s):  
United States ◽  
Land Tenure ◽  
Relevant Literature ◽  
Fire Regimes ◽  
The United States ◽  
Fire Frequency ◽  
Management Tool ◽  
Vegetation Types ◽  
Private Lands ◽  
United States Mexico

The relationship between people and wildfire has always been paradoxical: fire is an essential ecological process and management tool, but can also be detrimental to life and property. Consequently, fire regimes have been modified throughout history through both intentional burning to promote benefits and active suppression to reduce risks. Reintroducing fire and its benefits back into the Sky Island mountains of the United States-Mexico borderlands has the potential to reduce adverse effects of altered fire regimes and build resilient ecosystems and human communities. To help guide regional fire restoration, we describe the frequency and severity of recent fires over a 32-year period (1985-2017) across a vast binational region in the United States-Mexico borderlands and assess variation in fire frequency and severity across climate gradients and in relation to vegetation and land tenure classes. We synthesize relevant literature on historical fire regimes within 9 major vegetation types and assess how observed contemporary fire characteristics vary from expectations based on historical patterns. Less than 28% of the study area burned during the observation period, excluding vegetation types in warmer climates that are not adapted to fire (eg, Desertscrub and Thornscrub). Average severity of recent fires was low despite some extreme outliers in cooler, wetter environments. Midway along regional temperature and precipitation gradients, approximately 64% of Pine-Oak Forests burned at least once, with fire frequencies that mainly corresponded to historical expectations on private lands in Mexico but less so on communal lands, suggesting the influence of land management. Fire frequency was higher than historical expectations in extremely cool and wet environments that support forest types such as Spruce-Fir, indicating threats to these systems possibly attributable to drought and other factors. In contrast, fires were absent or infrequent across large areas of Woodlands (~73% unburned) and Grasslands (~88% unburned) due possibly to overgrazing, which reduces abundance and continuity of fine fuels needed to carry fire. Our findings provide a new depiction of fire regimes in the Sky Islands that can help inform fire management, restoration, and regional conservation planning, fostered by local and traditional knowledge and collaboration among landowners and managers.

scholarly journals Regulation and Practice of Forest-Management Fires on Private Lands in the Southeast United States: Legal Open Burns versus Certified Prescribed Burns

2020 ◽  
Vol 118 (4) ◽  
pp. 385-402
Author(s):  
Xue Han ◽  
Gregory E Frey ◽  
Changyou Sun
Keyword(s):  
United States ◽  
Forest Management ◽  
Standard Of Care ◽  
Past Research ◽  
The United States ◽  
Management Tool ◽  
Policy And Practice ◽  
Private Lands ◽  
Prescribed Burns ◽  
Southeast United States

Abstract Abstract Forest-management burns have been widely acknowledged as a useful land-management tool in the United States. Nevertheless, fire is inherently risky and may lead to severe damages or create smoke that affects public health. Past research has not explored the difference in policy and practice between open burns, which meet minimum legal criteria, and certified prescribed burns, which follow a higher standard of care. This study seeks to understand the distinction between legal open burns and certified prescribed burns, and, furthermore, to identify trends by type of burn in the Southeast United States. To that end, we compared statutes, regulations, incentives, and notifications of fire as a forest-management tool among nine states in the US Southeast. We found no steady time trends in number or area of burns among the states for the past decade. A nontrivial proportion of legal open burns, which tend to be smaller burns, are noncertified burns, meaning they meet minimum legal requirements, but not the higher standard required for certified prescribed burns.

scholarly journals Perceptions of NRCS Assistance with Prescribed Fires on U.S. Private Lands: A Regionally Stratified Case Study

Fire ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 47
Author(s):  
Ryan Wilbur ◽  
Charles Stanley ◽  
Kristie A. Maczko ◽  
John Derek Scasta
Keyword(s):  
United States ◽  
Prescribed Fire ◽  
Regional Differences ◽  
The United States ◽  
Public Understanding ◽  
Management Tool ◽  
Prescribed Fires ◽  
Private Landowners ◽  
Private Lands ◽  
Private Landowner

The benefits of prescribed fires are recognized throughout the United States, but the ability to assist with prescribed fire application on private land by government agencies has many possible constraints and challenges. The Natural Resources Conservation Service (NRCS), a federal agency, is mandated to assist private landowners with meeting land management objectives, but the ability of employees to utilize prescribed fire as a management tool is complex. We conducted a regionally stratified online survey of NRCS employees across the United States to determine the barriers inhibiting their ability to assist private landowners with prescribed fire application. In January of 2020, we recruited 101 NRCS rangeland and grazing land specialists to participate in the survey with 50 completing the survey (regional sample size: Central n = 14, Northeast n = 5, Southeast n = 12, West n = 19). A majority (82%) of respondents thought prescribed fires were staying the same or increasing in number. Regional differences in assistance types were significant for conducting burns and providing technical education, but not for other assistance types. Regional differences for perceived constraints were also significant for how the public understands the risks of prescribed fire and the ecological constraints but not for state policy, federal policy, liability, or public understanding of prescribed fire benefits. Overall and across regions, the NRCS survey participants perceived federal policies, liability, and private landowners’ lack knowledge of prescribed fire limits their ability to assist in the utilization of prescribed fire. Creating a national policy that allows a streamlined process for NRCS employees to assist with prescribed fire implementation and collaborative initiatives to improve private landowner knowledge gaps has the potential to improve prescribed fire application across the United States.

Understanding Characteristics Of Users With Signs Of Opioid Misuse On Twitter (Preprint)

2020 ◽  
Author(s):  
Haya Jarad ◽  
Junhua Yang ◽  
Abeed Sarker
Keyword(s):  
United States ◽  
Pain Management ◽  
Religious Orientation ◽  
The United States ◽  
Opioid Abuse ◽  
Management Tool ◽  
Opioid Misuse ◽  
Major Health Problem ◽  
Personal Traits ◽  
And Behaviors

BACKGROUND Opioid misuse is a major health problem in the United States, and can lead to addiction and fatal overdose. The United States is in the midst of an opioid epidemic; in 2018, an average of approximately 130 Americans died daily from an opioid overdose and 2.1 million have an opioid use disorder (OUD). In addition to electronic health records (EHRs), social media have also been harnessed for studying and predicting physical and behavioral outcomes of OUD. Specifically, it has been shown that on Twitter the use of certain language patterns and their frequencies in subjects’ tweets are indicative of significant healthcare outcomes such as opioid misuse/use and suicide ideation. We sought to understand personal traits and behaviors of Twitter chatters relative to the motive of opioid misuse; pain or recreational. OBJECTIVE . METHODS We collected tweets using the Twitter public developer application programming interface (API) between April 13, 2018 – and May 21, 2018. A list of opioid-related keywords were searched for such as methadone, codeine, fentanyl, hydrocodone, vicodin, heroin and oxycodone. We manually annotated tweets into three classes: no-opioid misuse, pain-misuse and recreational-misuse, the latter two representing misuse for pain or recreation/addiction. We computed the coding agreement between the two annotators using the Cohen’s Kappa statistic. We applied the Linguistic Inquiry and Word Count (LIWC) tool on historical tweets, with at least 500 words, of users in the dataset to analyze their language use and learn about their personality raits and behaviors. LIWC is a text processing software that analyzes text narratives and produces approximately 90 variables scored based on word use that pertain to phsycological, emotional, behavioral, and linguistic processes. A multiclass logistic regression model with backward selection based on the BIC criterion was used to identify variables associated with pain and recreational opioid misuse compared to the base class; no-opioid misuse.. The goal was to understand whether personal traits or behaviors differ across different classes. We reported the odd ratios of different variables in both pain and recreational related opioid misuse classes with respect to the no-opioid misuse class. RESULTS The manual annotation resulted in a total of 1,164 opioid related tweets. 229 tweets were assigned to the pain-related class, 769 were in the recreational class, and 166 tweets were tagged with no opioid misuse class. The overall inter-annotator agreement (IAA) was 0.79. Running LIWC on the tweets resulted in 55 variables. We selected the best model based on BIC. We examined the variables with the highest odd ratios to determine those associated with both pain and recreational opioid misuse as compared to the base class. Certain traits such as depression, stress, and melancholy are established in the literature as commonplace amongst opiod abuse indiviuals. In our analysis, these same characteristics, amongst others, were identified as significantly positively associated with both the Pain and Recreational groups compared to the no-opioid misuse group. Despite the different motivaions for opiod abuse, both groups present the same core personality traits. Interestingly, individuals who misuse opioids as a pain management tool exhibited higher odds ratios for psychological processees and personal traits based on their tweet language. These include a strong focus on discipline, as demonstrated by the variables “disciplined”, “cautious” and “work_oriented”. Their tweet language is also indicative of cheerfulness, a variable absent in the recreational misuse group. Variables associated with the reacreational misuse group revolve around external factors. They are generous and motivated by reward, while maintaining a religious orientation. Based on their tweet language, this group is also characterized as “active”; we understand that these individuals are more social and community focused . CONCLUSIONS To our best knowledge, this is the first study to investigate motivations of opioid abuse as it relates to tweet language. Previous studies utilizing Twitter data were limited to simply detecting opiod abuse likelihood through tweets. By delving deeper into the classes of opioid abuse and its motivation, we offer greater insight into opioid abuse behavior. This insight extends beyond simple identification, and explores patterns in motivation. We conclude that user language on Twitter is indicative of significant differences in personal traits and behaviors depending on abuse motivation: pain management or recreation.

A BIOSYSTEMATIC REVISION OF THE GENUS MUSCIDIFURAX (HYMENOPTERA: PTEROMALIDAE) WITH DESCRIPTIONS OF FOUR NEW SPECIES

1970 ◽  
Vol 102 (10) ◽  
pp. 1268-1290 ◽  
Author(s):  
Marcos Kogan ◽  
E. F. Legner
Keyword(s):  
United States ◽  
Puerto Rico ◽  
Central America ◽  
New World ◽  
The United States ◽  
Additional Species ◽  
Local Populations ◽  
Morphological Studies ◽  
Scanning Electronmicroscopy ◽  
United States Mexico

AbstractExtensive collections of synanthropic fly parasitoids in animal excrement accumulations in the United States, Mexico, Costa Rica, Puerto Rico, Uruguay, Chile, Denmark, Israel, and South Africa yielded seven forms of a Muscidifurax complex which were totally or partially reproductively isolated. Morphological studies of female and male parasitoids coupled with biological and zoogeographical information permitted the identification of five sibling species. Muscidifurax raptor Girault and Sanders 1910 is redescribed and four additional species are described as new: M. zaraptor, from the southwestern United States; M. raptoroides from Central America and Mexico; M. uniraptor from Puerto Rico, and M. raptorellus from Uruguay and Chile. Biological notes are added to the descriptions, and it was postulated that the genus is undergoing a process of speciation with local populations slowly becoming reproductively isolated and eventually giving rise to morphologically distinguishable entities. Most evidence suggests the establishment of Muscidifurax in the New World, concomitant with or shortly following the establishment of muscoid flies in accumulated excrement. Scanning electronmicroscopy was used in the analysis of some morphological structures.

scholarly journals Fungicide Resistance Management Guidelines for the Control of Tomato Diseases in the Mid-Atlantic and Northeast Regions of the United States

2010 ◽  
Vol 11 (1) ◽  
pp. 32 ◽  
Author(s):  
Christian A. Wyenandt ◽  
Steven L. Rideout ◽  
Beth K. Gugino ◽  
Margaret T. McGrath ◽  
Kathryne L. Everts ◽  
...  
Keyword(s):  
United States ◽  
Fungicide Resistance ◽  
Resistance Management ◽  
The United States ◽  
Management Tool ◽  
Fresh Market ◽  
Management Guidelines ◽  
Control Programs ◽  
Action Committee ◽  
Tomato Diseases

Foliar diseases and fruit rots occur routinely on tomato, an important crop grown throughout the Mid-Atlantic and Northeast regions of the United States where it is produced for both fresh-market and processing. To enable these tomato growers to more effectively manage economically important diseases, a fungicide resistance management table has been developed which promotes the importance of understanding FRAC (Fungicide Resistance Action Committee) codes and provides an integrated pest management tool for tomato growers which will allow them to develop season-long disease control programs with an emphasis on fungicide resistance management. Accepted for publication 19 July 2010. Published 27 August 2010.

Sign in / Sign up

Export Citation Format

Share Document