Some Scolytidae From the Sierra Madre Occidental in Mexico

1966 ◽  
Vol 98 (8) ◽  
pp. 871-875 ◽  
Author(s):  
J. B. Thomas
Keyword(s):  
Bark Beetles ◽  
Weather Conditions ◽  
Forest Composition ◽  
Insect Fauna ◽  
Sierra Madre Occidental ◽  
Sierra Madre ◽  
Host Relationships ◽  
Local Weather ◽  
Made In

AbstractA survey of the insect fauna in a part of the Sierra Madre Occidental in Mexico was made in 1964 by a party of nine entomologists from the Canada Departments of Agriculture and Forestry. Approximately 50 species of Scolytidae in 20 genera were collected on this expedition and are listed with host relationships and distribution where possible. A brief discussion of the known biology of one of the major economic bark beetles, a species of Dendroctonus, is given. The local weather conditions and the forest composition are discussed generally for the benefit of future collectors in this area.

scholarly journals Increasing numbers of wintering forest birds in Swedish Lapland 1986–2017 show stronger correlations with forest development than with local weather

Ornis Svecica ◽  
2020 ◽  
Vol 30 ◽  
pp. 13-30
Author(s):  
Björn Ferry ◽  
Håkan Rune ◽  
Ulf Andersson ◽  
Martin Green
Keyword(s):  
Human Population ◽  
Dead Wood ◽  
Weather Conditions ◽  
Forest Birds ◽  
Forest Composition ◽  
Point Count ◽  
Long Period ◽  
Open Ground ◽  
Regional Forest ◽  
Local Weather

After a long period of decline, the number of forest birds has increased in Sweden in recent decades. Whether this trend is due to an increase in forested area, forest quality, climate change, or a combination of these factors, remains unclear. Here, we compared forest bird data from a local winter point count route around Storuman in Swedish Lapland between 1986 and 2017, with the development of regional forest composition and local weather conditions. We suggest that rather than changes in average annual, winter, or summer local temperatures or precipitation, the main drivers behind increasing numbers of wintering forest birds in this part of Sweden are an increase in the area of denser forest and dead wood volume, and a decrease in open ground area without forest vegetation. While there may be supplementary explanations behind the increasing numbers of forest birds, such as reduced agriculture, decreasing local human population, or stronger photosynthesis, our results indicate that local land use has been favourable for forest birds in recent decades in this area.

STABLE ISOTOPE COMPOSITIONS OF MODERN SURFACE WATER IN THE SIERRA MADRE OCCIDENTAL, MEXICO

2020 ◽  
Author(s):  
Jordan M. Foote ◽  
◽  
Majie Fan ◽  
Aaron J. Martin ◽  
Lu Zhu
Keyword(s):  
Surface Water ◽  
Stable Isotope ◽  
Sierra Madre Occidental ◽  
Sierra Madre

Analog Models for Empirical-Statistical Downscaling

2021 ◽  
Author(s):  
María Laura Bettolli
Keyword(s):  
Statistical Downscaling ◽  
Climate Models ◽  
Global Climate ◽  
Regional Climate ◽  
Weather Conditions ◽  
Climate Information ◽  
Analog Method ◽  
Weather Typing ◽  
Regional Climates ◽  
Local Weather

Global climate models (GCM) are fundamental tools for weather forecasting and climate predictions at different time scales, from intraseasonal prediction to climate change projections. Their design allows GCMs to simulate the global climate adequately, but they are not able to skillfully simulate local/regional climates. Consequently, downscaling and bias correction methods are increasingly needed and applied for generating useful local and regional climate information from the coarse GCM resolution. Empirical-statistical downscaling (ESD) methods generate climate information at the local scale or with a greater resolution than that achieved by GCM by means of empirical or statistical relationships between large-scale atmospheric variables and the local observed climate. As a counterpart approach, dynamical downscaling is based on regional climate models that simulate regional climate processes with a greater spatial resolution, using GCM fields as initial or boundary conditions. Various ESD methods can be classified according to different criteria, depending on their approach, implementation, and application. In general terms, ESD methods can be categorized into subgroups that include transfer functions or regression models (either linear or nonlinear), weather generators, and weather typing methods and analogs. Although these methods can be grouped into different categories, they can also be combined to generate more sophisticated downscaling methods. In the last group, weather typing and analogs, the methods relate the occurrence of particular weather classes to local and regional weather conditions. In particular, the analog method is based on finding atmospheric states in the historical record that are similar to the atmospheric state on a given target day. Then, the corresponding historical local weather conditions are used to estimate local weather conditions on the target day. The analog method is a relatively simple technique that has been extensively used as a benchmark method in statistical downscaling applications. Of easy construction and applicability to any predictand variable, it has shown to perform as well as other more sophisticated methods. These attributes have inspired its application in diverse studies around the world that explore its ability to simulate different characteristics of regional climates.

Post-Oligocene river incision, southern Sierra Madre Occidental, Mexico

Geomorphology ◽  
2003 ◽  
Vol 55 (1-4) ◽  
pp. 235-247 ◽  
Author(s):  
David R. Montgomery ◽  
Jorge López-Blanco
Keyword(s):  
Sierra Madre Occidental ◽  
River Incision ◽  
Sierra Madre

scholarly journals New locality of the endangered Sierra Madre Sparrow (Xenospiza baileyi) from the State of Durango, Mexico, and recommendations for its conservation

2018 ◽  
Vol 34 (1) ◽  
pp. 1-6 ◽  
Author(s):  
José Hugo Martínez-Guerrero ◽  
Jorge Nocedal ◽  
Daniel Sierra-Franco ◽  
Samuel Ignacio Arroyo-Arroyo ◽  
Martín Emilio Pereda-Solís
Keyword(s):  
The State ◽  
Reproductive Season ◽  
Livestock Grazing ◽  
Rainfed Agriculture ◽  
Sierra Madre Occidental ◽  
Sierra Madre ◽  
Protection Area ◽  
Northwestern Mexico ◽  
The City ◽  
Special Protection

The Sierra Madre Sparrow (Xenospiza baileyi) is an endemic species of Mexico that is threatened with extinction. Its distribution is reported in two areas: One in the Transvolcanic Belt of central Mexico (La Cima) near Mexico City and the other in the Sierra Madre Occidental in northwestern Mexico (Ejido Ojo de Agua El Cazador) near the city of Durango, in the state of Durango. The habitat is the same in these two areas, and consists of sub-alpine grassland that is located in shallow valleys or shallows. In our case, "El Bajío la Cantera" of approximately 55 hectares, is mostly used in rainfed agriculture, protected from livestock grazing with wire fences, which in turn represents protection for remnants of grassland where they are the birds. “El Bajío la Cantera" belongs to Ejido 12 de Mayo, Municipality of San Dimas, Durango, where 28 males were detected singing along a 500 meter transect. This finding represents the population of the healthiest Sierra Madre Sparrow currently known, so it would be necessary to document their population trend over time. This information can help to evaluate and propose the creation of a special protection area for the species that involves joint government actions and ejidatarios tending to conserve the habitat during the reproductive season in order to increase and / or maintain the size of the population.

scholarly journals Adolescencia rural indígena, escuela y masculinidades

2018 ◽  
Vol 13 (1) ◽  
pp. 69
Author(s):  
Lourdes Consuelo Pacheco-Ladrón de Guevara
Keyword(s):  
Sierra Madre Occidental ◽  
Sierra Madre

Tanto la niñez como la adolescencia se consideran construcciones socioculturales enmarcadas en contextos específicos. De ahí que lejos de establecer parámetros genéricos sobre la adolescencia, su estudio particular permite especificar las formas de ser adolescente en situaciones concretas. En el presente documento se aborda la construcción de las masculinidades rurales indígenas desde la comunidad y la escuela telesecundaria, para lo cual se realizaron grupos focales y entrevistas a estudiantes indígenas de telesecundaria de la Sierra Madre Occidental durante los años 2010 y 2011. Se discute la importancia de abordar la construcción de las masculinidades adolescentes en el marco de la irrupción de la escuela telesecundaria en la zona indígena en función de que la escuela telesecundaria se ha convertido en el espacio de la adolescencia indígena rural. Se concluye que la escuela tiene posibilidades de convertirse en un espacio de discusión de las propuestas comunitarias tradicionales si es capaz de replantear la funcionalidad de las masculinidades en los contextos específicos a partir de las condiciones del grupo cultural.

scholarly journals CFD to analyze energy exchange by convection in a closed greenhouse with a pipe heating system

2019 ◽  
Vol 29 ◽  
pp. 1-16 ◽  
Author(s):  
Jorge Flores-Velazquez ◽  
Federico Villarreal-Guerrero ◽  
Abraham Rojano-Aguilar ◽  
Uwe Schdmith
Keyword(s):  
Energy Exchange ◽  
Weather Conditions ◽  
Heating System ◽  
Wave Radiation ◽  
University Of Berlin ◽  
Temperature Heat ◽  
Humboldt University ◽  
Artificial Heat ◽  
Local Weather ◽  
Heat Released

In some locations with harsh winters, the heat stored in the soil may not be enough to heating a greenhouse, and so artificial heat must be supplied. The objective of this study was to evaluate a numerical model under local weather conditions, in Humboldt University of Berlin, Germany, during winter 2011 to analyze the air dynamics generated through a tube pipe heating system convection in a closed greenhouse, for it to be applicable in producing cold regions in Mexico. Results showed that 100 W m-2 of heat released from the soil kept the environment within acceptable ranges for plant growth from noon to evening. However, the energy lost by long-wave radiation during the night lowered the air temperature to minimal basal temperature. Heat from the pipes placed underneath the crop promoted air movement by convection, producing a uniform distribution of temperature and humidity within the plant canopy.

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