Results 161 to 170 of about 577,370 (206)

Distributional Patterns and Biogeographic Analysis of Ferns in the Sierra Madre Oriental, Mexico

American Fern Journal, 2011
We analyzed the distributional patterns of 66 species of leptosporangiate ferns inhabiting in the Sierra Madre Oriental (SMO), Mexico, using grid-cells and endemism index values, parsimony analysis of endemicity (PAE) and track analysis. The strict consensus area cladogram obtained with PAE showed a polytomy and four main groups or clades, two of them ...
Raúl Contreras-Medina, Isolda Luna-Vega
exaly   +3 more sources

Meliosma mexicana (Sabiaceae), una especie nueva de la Sierra Madre Oriental de México [PDF]

Acta Botanica Mexicana, 2007
Se describe como especie nueva a Meliosma mexicana (Sabiaceae). Es endémica de la Sierra Madre Oriental de México en los estados de Querétaro y Tamaulipas.
Steinmann, V.W., Victor W. Steinmann, VICTOR WERNER STEINMANN, W. Steinmann, Victor   +3 more
exaly   +2 more sources

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The Basin Settlements of the Middle Sierra Madre Oriental, Mexico

Annals of the American Association of Geographers, 1936
From northern Coahuilato southeastern Puebla, an airline distance of 900 miles, the Sierra Madre Oriental presents a variety of physical and cultural qualities. In general the changes are progressive: from north to south the altitude, ruggedness and humidity increase; population density is also greater to the southward.
exaly   +2 more sources

Agave albopilosa (Agavaceae, subgénero Littaea, grupo Striatae), una especie nueva de la Sierra Madre Oriental en el noreste de México [PDF]

Acta Botanica Mexicana, 2007
Se propone como especie nueva a Agave albopilosa, un maguey pequeño rupícola del grupo Striatae, de la Sierra Madre Oriental. Su característica más sobresaliente es un mechón circular de pelos blancos en la porción distal de las hojas, justo debajo de ...
José Ángel Villarreal
exaly   +2 more sources

Modeling of groundwater processes in a karstic aquifer of Sierra Madre Oriental, Mexico

Applied Geochemistry, 2018
Abstract The Sierra Madre Oriental (SMO) is composed of ranges with important regional geological structures in highly fractured carbonate rocks (Abra Formation), which facilitate the recharge of aquifers. At the regional scale, recharge occurs in the western SMO and locally, in ranges such as Palmillas, La Colmena and Abra, while the regional ...
J. Moran-Ramírez, J.A. Ramos-Leal, J. Mahlknecht, G. Santacruz-DeLeón, F. Martín-Romero, R. Fuentes Rivas, A. Mora   +6 more
openaire   +1 more source

A new species of Lobelia (Campanulaceae: Lobelioideae) from the Sierra Madre Oriental, Mexico

Phytotaxa, 2022
Lobelia alanae sp. nov. from Puebla and Veracruz, Mexico, is described from four known populations in tropical deciduous forests from 153 to 700 m elevation. This new species is compared to the closely related Lobelia porphyrea, a species known only from the type collection in the state of Hidalgo. Lobelia alanae can be separated from L.
Pérez-Pérez, Miguel A., Ayers, Tina J., Amith, Jonathan D.   +2 more
openaire   +2 more sources

Late Holocene Vegetation Change in the Sierra Madre Oriental of Central Mexico

Quaternary Research, 2002
AbstractPast vegetation and climate changes reconstructed from a sediment core from Laguna Atezca, Molango, Mexico, provide new insights into the environmental and cultural histories of the Sierra Madre Oriental during the last 1700 yr. Pollen, microscopic charcoal, sediment chemistry, loss on ignition, and magnetic susceptibility indicate that three ...
Maria Elena Conserva, Roger Byrne
openaire   +1 more source

The Sierra Madre Oriental Orocline: Paleomagnetism of the Nazas Province in NE Mexico

Journal of Geophysical Research: Solid Earth
Abstract Curved mountain belts are spectacular natural features that contain crucial 3D information about the tectonic evolution of orogenic systems in the absence of other kinematic markers. The Mesozoic units exposed in the Mexican Fold and Thrust Belt in northeastern Mexico show a striking curvature, whose kinematic history has not
César Francisco Ramírez, Gabriel Chávez Cabello, Roberto Stanley Molina Garza   +2 more
exaly   +4 more sources

DEFORMATION HISTORY OF THE SIERRA MADRE ORIENTAL, MEXICO, AND ASSOCIATED HYDROCARBON System

4th International Congress of the Brazilian Geophysical Society, 1995
An examination of the tectonic development and deformation style of the Sierra Madre Oriental (SMO) was undertaken as the first part of a joint project involving Pemex, the Instituto Mexicano del Petr61eo, and Amoco. This served as a starting point for an evaluation of the petroleum potential of this folded thrust belt.
G. Prost, R. Marrett, M. Aranda, S. Egulluz, J. G. Galicia, J. Banda, J. Patino, S. Onuńo   +7 more
openaire   +1 more source

Changes in connectivity and hydrological efficiency following wildland fires in Sierra Madre Oriental, Mexico

Science of The Total Environment, 2019
Fire modifies soil surface, and hence soil hydrological properties change after wildland fires. High fire severity causes partial or total removal of vegetation, reduction of soil aggregate stability and increased water repellency, which are associated with high runoff and erosion.
Azalea Judith Ortíz-Rodríguez, Carlos Muñoz-Robles, Lorenzo Borselli   +2 more
openaire   +2 more sources