4 research outputs found
Fire response of the endangered Pinus culminicola stands after 18 years in Cerro El PotosĂ, northeast Mexico
Abstract
Aim of the study: To analyze the impact of the 1998 wildfire on dwarf pine (Pinus culminicola) population stands 18 years after the fire.
Area of study: Cerro el PotosĂ, Nuevo LeĂłn (MĂ©xico).
Material and methods: We measured regeneration, biovolume of individuals, diversity and species composition in unburned and
burned plots randomly selected in the area.
Main results: Recovery was very slow, with limited dense natural regeneration and very slow growth. Significant differences
between control and burned plots were found with respect to regeneration, species composition, evenness and soil nutrients, suggesting
that fire could promote natural regeneration and biodiversity in these communities.
Research highlights: Management efforts are necessary to maintain a natural fire regime and ensure grazing exclusion in order to
favor the conservation of the community dominated by this rare species P. culminicola.
Additional keywords: fire ecology; DCA; Permanova; richness.
Abbreviations used: CIC (Cationic Interchange Complex); DCA (Detrended Correspondence Analysis); EC (Exchangeable
Cation); OM (Organic Matter).
AuthorsÂŽ contributions: Conceived, designed and performed the experiments: JRA, EE and HGR. Analyzed the data: JRA, JAV,
JRE and YM. Contributed reagents/materials/analysis tools: JAV, JRE, YM, IC and JU. Wrote the paper: JRA, JAE and EE. All authors
read and approved the final manuscript.
Citation: ArĂ©valo, J. R.; Estrada, E.; Encina, J. A.; Villarreal, J. A.; Escobedo, J. R.; Morales, Y.; CantĂș, I.; GonzĂĄlez-RodrĂguez, H.;
Uvalle, J. (2017). Fire response of the endangered Pinus culminicola stands after 18 years in Cerro El PotosĂ, northeast Mexico. Forest
Systems, Volume 26, Issue 3, e015. https://doi.org/10.5424/fs/2017263-11566
Received: 20 Apr 2017. Accepted: 21 Nov 2017.
Copyright © 2017 INIA. This is an open access article distributed under the terms of the Creative Commons Attribution (CC-by)
Spain 3.0 License.
Funding: Program of cooperation Universidad de La Laguna-Universidad AutĂłnoma de Nuevo LeĂłn, included in the official
frame agreement of these institutions; Facultad de Ciencias Forestales of the Universidad AutĂłnoma de Nuevo LeĂłn; University of La
Laguna (Research Program) covered the travel expenses of JRA.
Competing interests: The authors have declared that no competing interests exist.
Correspondence should be addressed to José R. Arévalo: [email protected]
Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries
Abstract
Background
Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres.
Methods
This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and lowâmiddle-income countries.
Results
In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of âsingle-useâ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for lowâmiddle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia.
Conclusion
This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both highâ and lowâmiddleâincome countries
Fire response of the endangered Pinus culminicola stands after 18 years in Cerro El PotosĂ, northeast Mexico
Aim of the study: To analyze the impact of the 1998 wildfire on dwarf pine (Pinus culminicola) population stands 18 years after the fire.
Area of study: Cerro el PotosĂ, Nuevo LeĂłn (MĂ©xico)
Material and methods: We measured regeneration, biovolume of individuals, diversity and species composition in unburned and burned plots randomly selected in the area.
Main results: Recovery was very slow, with limited dense natural regeneration and very slow growth. Significant differences between control and burned plots were found with respect to regeneration, species composition, evenness and soil nutrients, suggesting that fire could promote natural regeneration and biodiversity in these communities.
Research highlights: Management efforts are necessary to maintain a natural fire regime and ensure grazing exclusion in order to favor the conservation of the community dominated by this rare species P. culminicola
The High-Altitude water cherenkov (HAWC) observatory in MĂ©xico: The primary detector
The High-Altitude Water Cherenkov (HAWC) observatory is a second-generation continuously operated, wide field-of-view, TeV gamma-ray observatory. The HAWC observatory and its analysis techniques build on experience of the Milagro experiment in using ground-based water Cherenkov detectors for gamma-ray astronomy. HAWC is located on the Sierra Negra volcano in MĂ©xico at an elevation of 4100 meters above sea level. The completed HAWC observatory principal detector (HAWC) consists of 300 closely spaced water Cherenkov detectors, each equipped with four photomultiplier tubes to provide timing and charge information to reconstruct the extensive air shower energy and arrival direction. The HAWC observatory has been optimized to observe transient and steady emission from sources of gamma rays within an energy range from several hundred GeV to several hundred TeV. However, most of the air showers detected are initiated by cosmic rays, allowing studies of cosmic rays also to be performed. This paper describes the characteristics of the HAWC main array and its hardware.UCR::VicerrectorĂa de Docencia::Ciencias BĂĄsicas::Facultad de Ciencias::Escuela de FĂsic