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排序方式: 共有1007条查询结果,搜索用时 31 毫秒
961.
962.
Rodney K. Felix Jr Steve L. Orzell Eric A. Tillman Richard M. Engeman Michael L. Avery 《Environmental science and pollution research international》2014,21(17):10399-10406
Feral swine are estimated to annually cost hundreds of millions of dollars in economic loss to property and agriculture in the USA, while their ecological consequences remain largely unmeasured. Using submeter-accurate Global Positioning System technology over a multiyear project, we are quantifying in a novel way the spatial and temporal attributes of swine rooting damage within 587 ha of ecologically sensitive wetland plant communities at Avon Park Air Force Range in south-central Florida. We delineated damage polygons from 0.0023 to 4,335 m2 and were able to document recurrent damage through time at most sites during each assessment. For each polygon, we also estimated the age of damage and assigned to it a severity index, qualities of the rooting in which we detected changes in proportions over time. Spatially explicit damage assessments at fine scales conducted over several years can assist land managers in determining effects of rooting on rare plant populations, and will allow investigators to hypothesize what factors are driving patterns of this disturbance across ecologically sensitive plant communities. 相似文献
963.
Artigas J Arts G Babut M Caracciolo AB Charles S Chaumot A Combourieu B Dahllöf I Despréaux D Ferrari B Friberg N Garric J Geffard O Gourlay-Francé C Hein M Hjorth M Krauss M De Lange HJ Lahr J Lehtonen KK Lettieri T Liess M Lofts S Mayer P Morin S Paschke A Svendsen C Usseglio-Polatera P van den Brink N Vindimian E Williams R 《Environmental pollution (Barking, Essex : 1987)》2012,160(1):201-206
New concerns about biodiversity, ecosystem services and human health triggered several new regulations increasing the need for sound ecotoxicological risk assessment. The PEER network aims to share its view on the research issues that this challenges. PEER scientists call for an improved biologically relevant exposure assessment. They promote comprehensive effect assessment at several biological levels. Biological traits should be used for Environmental risk assessment (ERA) as promising tools to better understand relationships between structure and functioning of ecosystems. The use of modern high throughput methods could also enhance the amount of data for a better risk assessment. Improved models coping with multiple stressors or biological levels are necessary to answer for a more scientifically based risk assessment. Those methods must be embedded within life cycle analysis or economical models for efficient regulations. Joint research programmes involving humanities with ecological sciences should be developed for a sound risk management. 相似文献
964.
Yoon-Joo Lee Eric Haley Kiseol Yang 《Environmental Communication: A Journal of Nature and Culture》2019,13(2):239-254
Previous academic research into how consumers evaluate advocacy advertising identified many possible paths involving potentially reflexive effects on how people perceive an advocacy advertising sponsor, the advocated issue and themselves. This paper has examined one possible scenario within this complicated phenomenon: that of advertising advocating a specific environmental consumer action, recycling. In the specific context of this study, structural equation modelling demonstrated clear causal relationships among consumer perceptions of the recycling advertisements’ sponsoring organization, consumer self-efficacy and perceived consumer effectiveness of complying with the advocated issue (recycling behaviour). These factors were shown to impact specific advocacy advertising goals (termed message effectiveness in this study) such as behavioural intention toward the advocated recycling issue and perceived changes in how consumers evaluate the sponsoring organization. 相似文献
965.
966.
de Melo Madson Silveira Nazari Evelise Maria Joaquim-Justo Célia Muller Yara Maria Rauh Gismondi Eric 《Environmental science and pollution research international》2019,26(21):21535-21545
Environmental Science and Pollution Research - Glyphosate-based herbicides (GBH) are the most used herbicides worldwide and are considered as endocrine-disrupting compounds (EDC) for non-target... 相似文献
967.
Matlou Daniel Pheeha Bissong Marie Ebob AgborTabot Tchatchouang Christ-Donald Kaptchouang Adem Mohomud Rashid Foka Frank Eric Tatsing Kumar Ajay Ateba Collins Njie 《Environmental science and pollution research international》2019,26(15):15105-15114
Environmental Science and Pollution Research - Vancomycin-resistant enterococci (VRE) have been responsible for numerous outbreaks of serious infections in humans worldwide. Enterococcus faecium... 相似文献
968.
969.
Eric B. Sansone Paul M. Giever 《Journal of the Air & Waste Management Association (1995)》2013,63(9):605-606
Present standardized methods (ASME Power Test Code 27, Western Precipitation Bulletin 50, etc.) of stack sampling usually stress sampling under conditions of steady flow (no variation with time) in order to obtain data representative of the source emissions. On many occasions these standardized methods are applied when the velocity and/or the mass flow rate of pollutants do vary with time, thus impairing the accuracy of the sampling results. In addition, it is difficult to evaluate any inaccuracy of the sampling data. This paper classifies these two source variables into four categories and suggests basic sampling approaches for each type of source condition. Several standardized procedures are evaluated and classified according to the source conditions to which the procedure is applicable. The intent of this paper is to show the most accurate sampling approach for each source condition and thus serve as a guide when planning source sampling programs. 相似文献
970.
Yonghua Yang Eric R. Allen 《Journal of the Air & Waste Management Association (1995)》2013,63(11):1315-1321
The kinetics of H2S oxidation in a biofilter were evaluated and the reaction rates determined to be first-order at low concentrations (<200 ppm), zero-order at high concentrations (>400 ppm), and fractional-order in the intermediate concentration range for H2S in the inlet waste gas. The overall performance of the biofilter system and changes in compost properties were investigated for 200 days of operation. The compost biofiiter showed good buffering capacities to variations in gas flow rate and pollutant (H2S) loading impacts. Hydrogen sulfide removal efficiencies exceeding 99.9% were consistently observed. System acidification and sulfate accumulation were identified as inhibitors of required biological activity. Routine washing of the compost effectively mitigated these deficiencies. System upset was determined to be caused by compost dry-out or system overloading. Methods were developed to provide for recovery of contaminated filter material. 相似文献