scholarly journals Environmental controls over methyl halide emissions from rice paddies

2004 ◽  
Vol 18 (1) ◽  
pp. n/a-n/a ◽  
Author(s):  
K. R. Redeker ◽  
R. J. Cicerone
Keyword(s):  
Rice Paddies ◽  
Environmental Controls ◽  
Methyl Halide

scholarly journals Interfield and intrafield variability of methyl halide emissions from rice paddies

2002 ◽  
Vol 16 (4) ◽  
pp. 72-1-72-9 ◽  
Author(s):  
K. R. Redeker ◽  
J. Andrews ◽  
F. Fisher ◽  
R. Sass ◽  
R. J. Cicerone
Keyword(s):  
Rice Paddies ◽  
Methyl Halide

Disentangling the role of shared ancestry and the environment on leaf stable isotopes

2019 ◽  
Author(s):  
Marko J. Spasojevic ◽  
Sören Weber1
Keyword(s):  
Stable Isotopes ◽  
Environmental Conditions ◽  
Evolutionary History ◽  
Environmental Control ◽  
Phylogenetic Signal ◽  
Individual Species ◽  
Habitat Types ◽  
Δ13c And Δ15n ◽  
Environmental Controls ◽  
Shared Ancestry

Stable carbon (C) and nitrogen (N) isotopes in plants are important indicators of plant water use efficiency and N acquisition strategies. While often regarded as being under environmental control, there is growing evidence that evolutionary history may also shape variation in stable isotope ratios (δ13C and δ15N) among plant species. Here we examined patterns of foliar δ13C and δ15N in alpine tundra for 59 species in 20 plant families. To assess the importance of environmental controls and evolutionary history, we examined if average δ13C and δ15N predictably differed among habitat types, if individual species exhibited intraspecific trait variation (ITV) in δ13C and δ15N, and if there were a significant phylogenetic signal in δ13C and δ15N. We found that variation among habitat types in both δ13C and δ15N mirrored well-known patterns of water and nitrogen limitation. Conversely, we also found that 40% of species exhibited no ITV in δ13C and 35% of species exhibited no ITV in δ15N, suggesting that some species are under stronger evolutionary control. However, we only found a modest signal of phylogenetic conservatism in δ13C and no phylogenetic signal in δ15N suggesting that shared ancestry is a weaker driver of tundra wide variation in stable isotopes. Together, our results suggest that both evolutionary history and local environmental conditions play a role in determining variation in δ13C and δ15N and that considering both factors can help with interpreting isotope patterns in nature and with predicting which species may be able to respond to rapidly changing environmental conditions.

Environmental controls on estuarine nitrifying communities along a salinity gradient

2017 ◽  
Vol 80 (2) ◽  
pp. 167-180 ◽  
Author(s):  
M Monteiro ◽  
J Séneca ◽  
L Torgo ◽  
DFR Cleary ◽  
NCM Gomes ◽  
...  
Keyword(s):  
Salinity Gradient ◽  
Environmental Controls

High-Frequency Sound Interaction in Ocean Sediments: Modeling Environmental Controls

1999 ◽  
Author(s):  
Michael Richardson ◽  
Kevin Briggs ◽  
Dawn Lavoie ◽  
Dale Bibee
Keyword(s):  
High Frequency ◽  
High Frequency Sound ◽  
Frequency Sound ◽  
Environmental Controls

scholarly journals The Science Behind Safe School Re-Opening: Leveraging the Pillars of Infection Control to Support Safe Elementary and Secondary Education During the COVID-19 Pandemic

2021 ◽  
Author(s):  
Elissa M Schechter-Perkins ◽  
Polly van den Berg ◽  
Westyn Branch-Elliman
Keyword(s):  
Infection Control ◽  
Infection Prevention ◽  
Diagnostic Testing ◽  
Current Evidence ◽  
Implementation Barriers ◽  
Safe School ◽  
Elementary And Secondary Education ◽  
School Settings ◽  
Environmental Controls ◽  
Prevention Interventions

Abstract There are limited tools for adapting COVID-19 infection control plans to school settings. We present an infection prevention model for optimizing safe re-opening for elementary and secondary schools during the global COVID-19 pandemic and review the current evidence behind various infection prevention interventions in school settings. The model is adapted from the Centers for Disease Control and Prevention fundamental pillars for infection prevention, and includes four categories of intervention: epidemiologic controls (town prevalence metrics, diagnostic testing, quarantine strategies), administrative controls (state vaccination policies, alternative school models, symptom screens, quarantine breaks), engineering/environmental controls (distancing, outdoor space, ventilation), and personal protective equipment (PPE)/Hand hygiene (face coverings, hand sanitizing). The adapted infection control pillars model utilizes implementation-science informed considerations to maximize pragmatism and adherence by leveraging evidence-based strategies. It highlights the necessity of redundant infection prevention interventions, acknowledges the importance of community buy-in to achieve real-world effectiveness, and addresses tactics to overcome implementation barriers. Recommendations are grounded in the Dynamic Sustainability Framework and include suggestions to maintain infection prevention effectiveness over time to ensure ongoing safety.

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