COVID 19 Threat and the Role of Human and Natural Factors

2020 ◽  
pp. 87-103
Author(s):  
Srinidhi Jha ◽  
Manish Kumar Goyal
Keyword(s):  
Natural Factors

Long-term changes in microbial water quality indicators in a hydro-power plant reservoir: The role of natural factors and socio-economic changes

AMBIO ◽  
2021 ◽  
Author(s):  
Gunta Spriņġe ◽  
Māris Bērtiņš ◽  
Lesya Gnatyshyna ◽  
Ilga Kokorīte ◽  
Agnese Lasmane ◽  
...  
Keyword(s):  
Water Quality ◽  
Power Plant ◽  
Hydro Power ◽  
Microbial Water Quality ◽  
Economic Changes ◽  
Water Quality Indicators ◽  
Natural Factors ◽  
Long Term Changes

scholarly journals Determinantes de la adopción de estándares en el subsector hortícola del Noroeste de México.

2011 ◽  
Vol 12 (2) ◽  
pp. 175 ◽  
Author(s):  
Antonio Martínez R. ◽  
Belem Avendaño R. ◽  
Ana Acosta M.
Keyword(s):  
Product Differentiation ◽  
Production Systems ◽  
Agricultural Practices ◽  
Vegetable Production ◽  
Competitive Advantages ◽  
Natural Factors ◽  
Northwestern Region ◽  
Northwestern Mexico ◽  
Northwest Region

<p>La producción de hortalizas en la región Noroeste de México es una actividad económica relevante, lo cual se atribuye a factores naturales como el clima, calidad de los suelos y la cercanía al mercado de Estados Unidos de Norteamérica. Es evidente la creación de ventajas competitivas mediante la diferenciación del producto, por su calidad, a través de la aplicación de normas. La adopción de estándares es una práctica generalizada, sin embargo no está cuantificado el rol de las instituciones en estos procesos y su contribución a aumentar o inhibir los niveles de adopción de los mismos. El objetivo de este trabajo es analizar los factores que mas influyen en la implementación de grados y estándares en el sector hortícola en la región noroeste de México. Para la medición de la adopción se utilizó un modelo logit que permite determinar el efecto de las variables del entorno microeconómico que incide en la adopción de estándares. Se concluye que los cambios en los sistemas de producción mediante la aplicación de buenas prácticas agrícolas y las organizaciones de productores con actividades de capacitación, seguimiento y acompañamiento son lo que han contribuido en mayor forma al proceso de adopción de estándares por parte de las empresas productoras de hortalizas.</p><p> </p><p><strong>Determinants of the adoption of standards in the horticulture subsector of Northwestern Mexico.</strong></p><p>Vegetable production in the northwestern region of Mexico is an important economic activity; this is attributed to natural factors such as climate, soil quality, and proximity to the U.S. market. Clearly, the creation of competitive advantages gained by product differentiation, while maintaining quality, is extremely important and can be achieved through the application of standards. The adoption of standards is widespread; however, the role of institutions in these processes and their contribution to enhancing or inhibiting levels of implementation has not yet been quantified. The aim of this paper is to analyze the factors that most influence the execution of grades and standards in the horticultural industry in the northwest region of Mexico. Implementation levels were measured using a logit model that determined the effect of microenvironmental variables on them. The paper concludes that changes in production systems through the application of good agricultural practices and changes in organizations through training, monitoring, and support are what have helped companies that produce vegetables adopt and implement more standards.</p>

scholarly journals Paleogeographical Researches in Pacific Geographical Institute

2021 ◽  
pp. 15-32
Author(s):  
Н.Г. Разжигаева ◽  
Л.А. Ганзей ◽  
Т.А. Гребенникова ◽  
В.Б. Базарова ◽  
П.С. Белянин ◽  
...  
Keyword(s):  
Climate Changes ◽  
Far East ◽  
High Temporal Resolution ◽  
The Sea Of Japan ◽  
The South ◽  
Short Term ◽  
Natural Factors ◽  
Middle Mountains ◽  
Eastern Mongolia

Представлены результаты работы лаборатории палеогеографии и геоморфологии ТИГ ДВО РАН в 2017–2020 гг. Приведены новые данные по изучению развития материковых и островных геосистем юга Дальнего Востока и реакции их компонентов на короткопериодные климатические изменения позднего плейстоцена–голоцена. Палеоэкологические изменения с высоким временным разрешением восстановлены в среднегорье Восточного Сихотэ-Алиня. Новые данные получены по развитию геосистем побережья Японского моря, определена роль зональных и азональных природных факторов в их развитии. Выделены этапы развития ландшафтов платобазальтового рода. Реконструированы обстановки осадконакопления и формирования пойменных ландшафтов Приханкайской равнины. Сделаны детальные реконструкции хода развития островных ландшафтов для юга Приморья. Для юга Дальнего Востока проведен синтез изменений ландшафтов в последнее интенсивное потепление – малый оптимум голоцена (VII–XIII вв.). Проанализировано проявление природных катастроф и их пространственно-временной масштаб. Продолжены работы, направленные на оценку цунамиопасности на побережье восточного Приморья. Для Курильских островов выделены наиболее сильные цунами, которые могут быть рассмотрены как кандидаты в мегацунами. Внимание уделено трансформации ландшафтов при освоении территории юга Дальнего Востока древним человеком. Геоархеологические исследования проводились также во внутриконтинентальных районах (Западное Забайкалье, Восточная Монголия). The authors present the results of the researches of the laboratory of paleogeography and geomorphology of PGI FEB RAS in 2017–2020. New data include the study of the development of continental and island geosystems of the South Far East and the response of their components to short-term climate changes in the Late Pleistocene-Holocene. Paleoecological changes with a high temporal resolution have been restored in the middle mountains of the Eastern Sikhote-Alin. New data were obtained on the development of geosystems of the coast of the Sea of Japan, the role of zonal and azonal natural factors in their development was determined. The stages of development of landscapes of the platobasalt genus are highlighted. The conditions of sedimentation and formation of floodplain landscapes of the Khanka Lake plain were reconstructed. Detailed reconstructions of the island landscapes development for the south of Primorye have been made. For the south of the Far East, a synthesis of landscape changes in the last intense warming – Medieval Warm Period of the Holocene (VII-XIII centuries) was made. The manifestation of natural disasters and their space-time scale were analyzed. The investigations aimed at assessment of the tsunami hazard on the coast of eastern Primorye were continued. For the Kuril Islands, the most powerful tsunamis have been identified, which can be considered as candidates for megatsunami. Transformation of landscapes and a human impact on landscapes were also discussed. Geoarchaeological studies were also carried out in the intra-continental regions (Western Transbaikalia, Eastern Mongolia).

scholarly journals Johnsongrass (Sorghum halepense) Seed Dispersal in Corn Crops under Mediterranean Conditions

Weed Science ◽  
2012 ◽  
Vol 60 (1) ◽  
pp. 34-41 ◽  
Author(s):  
Judit Barroso ◽  
Dionisio Andújar ◽  
Carolina San Martín ◽  
César Fernández-Quintanilla ◽  
José Dorado
Keyword(s):  
Seed Dispersal ◽  
Soil Surface ◽  
Dispersal Pattern ◽  
Natural Factors ◽  
Vacuum Device ◽  
Combine Harvester ◽  
The Difference ◽  
Dispersal Distances ◽  
Natural Dispersal

Natural dissemination of johnsongrass seeds as well as the effect of combine harvesting on this process were studied in corn fields. The estimation of natural dispersal was carried out by two different methods, collecting seeds throughout the season using seed traps and sampling soil–surface seed abundance before harvest using a vacuum device. Both methods showed the same dispersal pattern. A minimum of 84.6% was dispersed in the first 2 m from the focus and a maximum of 1.6% was dispersed beyond the first 5 m. An average of 76.3% of these dispersed seeds were lost or buried after shedding but before harvest. Seed dispersal by the combine harvester was estimated from the difference between soil–surface seed abundance in the same sites pre and postharvest. Although the quantity of seeds dispersed by the combine was similar to those dispersed by natural factors, dispersal distances were significantly higher. Around 90% of the dispersed seeds were found in the first 5 m forward and backward of the combine direction from the infestation source, and 1.6% of the seeds were found beyond 22 m forward and 10 m backward of the combine direction from the infestation source. A large proportion of the seeds dispersed were dormant or not viable. It is concluded that the major role of sexual reproduction in johnsongrass population dynamics may be to spread the risks, promoting dispersal in time and space.

The role of natural factors in constraining long-term tropospheric ozone trends over Southern China

2020 ◽  
Vol 220 ◽  
pp. 117060 ◽  
Author(s):  
Xi Chen ◽  
Buqing Zhong ◽  
Fuxiang Huang ◽  
Xuemei Wang ◽  
Sayantan Sarkar ◽  
...  
Keyword(s):  
Tropospheric Ozone ◽  
Southern China ◽  
Natural Factors ◽  
Ozone Trends
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