Escalante Tania

Universidad Nacional Autónoma de México | UNAM · Department of Evolutionary Biology

The volcano rabbit (Romerolagus diazi), endemic to the central-eastern Transmexican Volcanic Belt, is one of the most threatened lagomor-phs worldwide. Several factors threaten to decrease its geographical distribution, which is already restricted to the Pelado, Tláloc, Iztaccíhuatl, and Popocatépetl volcanoes. Our study aimed to propose priority a...

We provide a preliminary nomenclatural proposal and a digital map of the Nearctic region, based on published regionalizations, especially Dice (1943), and applying the International Code of Area Nomenclature. The Nearctic region is comprised of three subregions (one of them with two dominions), one transition zone and 29 provinces. The Arctic subre...

Background Montes de María is the best-preserved tropical dry forest fragment in the Colombian Caribbean, making it a good model to relate environmental and geographic factors to woody plant community structure. Aims We related alpha and beta diversity of woody plant communities to geographic distance and bioclimatic factors to understand the unde...

We provide a map and shapefile of the 57 biogeographic provinces of the Neotropical region. Recognition of these provinces is based on their endemic species, but their delimitation on the map is based on ecoregions combining climatic, geological, and biotic criteria. These provinces belong to the Antillean, Brazilian and Chacoan subregions, and the...

Para contribuir en el conocimiento de los incendios forestales y su afectación a la fauna de Guanajuato. Este mapa fue elaborado por Oscar Campos en colaboración con la Dra. Michelle Farfán.

El centro de México está atravesado por una unidad geográfica montañosa que ha sido denominada por los geólogos como Faja Volcánica Transmexicana. La FVT incluye altitudes desde los 1,500 metros sobre el nivel del mar, con picos que superan los 5,000 metros, lo que produce islas de bosques de pino y encino separadas por matorrales de climas cálidos...

The volcano rabbit (Romerolagus diazi), endemic to the central-eastern Transmexican Volcanic Belt, is one of the most threatened lagomorphs worldwide. Several factors threaten to decrease its geographical distribution, which is already restricted to the Pelado, Tláloc, Iztaccíhuatl, and Popocatépetl volcanoes. Our study aimed to propose priority ar...

Figure 1. Map of the regionalization of the Nearctic region, including three subregions, one transition zone and 29 provinces

Los Nodos Panbiogeográficos (NP) constituyen uno de los principales aportes de la biogeografía evolutiva a la conservación de la biodiversidad, los cuales se interpretan como la superposición en espacio-tiempo de diferentes fragmentos geobióticos ancestrales, permitiendo identificar prioridades que preservan la riqueza de especies y de orígenes evo...

México posee la mayor riqueza de conejos y liebres del continente americano. Algunos de estos animales viven en desiertos, otros en bosques, y hay uno que vive a la sombra de volcanes: el zacatuche, teporingo o tepolito. Este pequeño conejo de los volcanes, descrito por primera vez en 1893 (aunque ya lo conocían los pueblos nahuas) es endémico de l...

Los estudios sobre las áreas de distribución geográfica (ADG) proporcionan información sobre cómo se establecen las especies en el espacio y tiempo, y los efectos del cambio de uso de suelo sobre los patrones geográficos de la biodiversidad. En la provincia biogeográfica de la Faja Volcánica Transmexicana (FVT) habita un alto número de especies end...

Since the 19th century, 2 factors stood out during the studies of the complex species distribution in the central Mexican mountain ranges: the acknowledgment of biotic regions and the congruent distribution of widespread taxa. Such patterns were subsequently confirmed. However, towards the late 19th century and early 20th century, the acknowledgeme...

Evolutionary biogeography aims to discover biogeographic patterns exhibited by plant and animal taxa and to assess the historical changes that have shaped the assembly of biotas. One of these biotas is found in the Neotropical region, which has been described, delimited and regionalized by several authors since the 19th century. Important contribut...

Natural protected areas (NPA) are portions of the Mexican territory where the original environment has not been modified and which are protected in order to conserve, restore, and develop biodiversity. Here, we evaluated the effectiveness of 18 NPA located within the Transmexican Volcanic Belt by analyzing deforestation and land use and land cover...

Antecedentes: Las provincias florísticas Cuenca del Balsas (CB) y Faja Volcánica Trans-Mexicana (FVT) coinciden en el estado de Morelos y destacan por su riqueza y endemismo florístico. Documentar la distribución de su flora endémica aportaría elementos para evaluar su sensibilidad a la modificación de su entorno. Preguntas: ¿El análisis de la dis...

In the Neotropics, the distribution of Capparaceae has been historically associated with seasonally dry forest (NSDF), but recent taxonomic studies have questioned this assumption. Given the environmental co-occurrence of species and the need to understand their relationships with the ecosystem, we use ecological niche modelling and numerical ecolo...

Many biotic groups have been proposed as biodiversity surrogates; however, using different taxa could provide complementary information for choosing conservation priorities. There are two general ways to evaluate the performance of surrogates: (1) using cross-taxon congruency as an a priori test, before the application of some prioritization algori...

The Capparaceae are a family of plants associated mainly with dry areas, which have produced climatic constraints and a limited geographic distribution. This family is considered endemic in the Neotropical seasonally dry forest (NSDF) and, therefore, a model to analyse the NSDF biogeography. We conducted a track analysis of Neotropical species of C...

In the Neotropics, the distribution of Capparaceae has been historically associated with seasonally dry forest (NSDF), but recent taxonomic studies have questioned this assumption. Given the environmental co-occurrence of species and the need to understand their relationships with the ecosystem, we use ecological niche modelling and numerical ecolo...

Areas of endemism (AoE) are identified by the congruence of two or more geographic distribution areas. They represent patterns of distribution resulting from ecological and evolutionary processes and constitute the basic units of biogeographic regionalizations; however, they are not usually environmentally characterized. The 54 world areas of endem...

Neotropical seasonally dry forest (NSDF) has climatic constraints that have produced endemic species confined to floristic nuclei throughout those taxa with distribution restricted to this forest. Capparaceae have a pantropical distribution, although traditionally they have been considered mainly to be distributed in dry areas and therefore influen...

Objetivo Integrar el método de la panbiogeografía y datos de filogenias moleculares para incorporar la hipótesis de vicarianza como explicación alterna a la dispersión.

The Nearctic region is located on the North American plate. However, its tectonic history is related to convergence with other plates, which has promoted a complex topography. This complexity should be reflected by the distributional patterns of the biota. We used track analysis with 574 species of mammals to identify generalized tracks and panbiog...

The mammals are the biological group initially analysed by Wallace to define the Neotropical region (NR). Their areas of endemism (Ae) are considered historical patterns, which have been used to describe biogeographic schemes. However, the Ae at regional scale are currently unclear. In the present study, we analyse Ae of mammals at the regional sca...

The Mexican Transition Zone (MTZ) is an area where the Nearctic and Neotropical biogeographical regions overlap, generating high species richness and endemism. The objective of this study was to analyse if potential changes in the composition and the geographical location of areas of endemism (AEs) for beetles and mammals during the Last Glacial Ma...

Resumen Existe evidencia de que las actividades antrópicas modifican la distribu-ción de muchas especies de vertebrados. El presente estudio propone un índice difuso de aptitud de hábitat para evaluar cómo la deforestación y fuentes de actividad antrópica, tales como la proximidad a una mina de hierro a cielo abierto, las carreteras y los asentamie...

Existe evidencia de que las actividades antrópicas modifican la distribución de muchas especies de vertebrados. El presente estudio propone un índice difuso de aptitud de hábitat para evaluar cómo la deforestación y fuentes de actividad antrópica, tales como la proximidad a una mina de hierro a cielo abierto, las carreteras y los asentamientos urba...

We provide a map of the 14 biogeographic provinces of Mexico based on the ecoregions recognized for the country, which combine climatic, geological and biotic criteria. These provinces belong to the Nearctic region (Californian, Baja Californian, Sonoran, Chihuahuan Desert and Tamaulipas provinces), Neotropical region (Pacific Lowlands, Balsas Basi...

Track analysis is the core of panbiogeographic analysis. In this work, we reflect on the formalization of track analysis, its methodological issues, and interpretations by using new software developments and from a contemporary evolutionary biogeographical viewpoint. From a geometric perspective, we analyze the meaning of a minimal spanning tree, c...

In the present study, we measured spatiotemporal properties of ecological niches of amphibians in China and tested the relative importance of various niche-diversity metrics for explaining the evolutionary distinctiveness-weighted extinction risk (EDGE) of amphibian species. We applied the hierarchical partitioning technique on the phylogenetically...

The tribe Tigridieae (Iridoideae: Iridaceae) is a New World group with centres of diversity in Mexico and Andean South America. North America harbours 67 of the 172 species recognised within the tribe, 54 being endemic. Our aims were to identify areas of endemism of the North American Tigridieae using endemicity analysis (EA) and to infer their rel...

In the European Alpine System, the Carpathian Mountains are recognized as one of the major centres of diversity and endemism. In the present study, we aimed to explain the spatial structure of plant endemism in its South-Eastern subunit by the complementary use of diversity indices, parsimony analysis of endemicity (PAE), biotic element analysis (B...

Primary biogeographic homology implies that different taxa are spatiotemporally integrated in a biota with a common biogeographic history, namely naturalness. Primary spatial homology includes the identification of areas of endemism. Therefore, the first step to approach a natural regionalization is to identify the patterns of endemism. In order to...

The Mexican Mountain Component (MMC) includes six biogeographical provinces. In this manuscript, we propose to use endemic taxa as surrogates to prioritize for conservation areas of the MMC. We use the distribution of 24 endemic mammals to prioritize conservation sites in the MMC and to evaluate the current Mexican system of protected natural areas...

Quantitative evaluations of species distributional congruence allow evaluating previously proposed biogeographic regionalization and even identify undetected areas of endemism. The geographic scenery of Northwestern Argentina offers ideal conditions for the study of distributional patterns of species since the boundaries of a diverse group of biome...

Here, we presented a description of the responses more emblematic, from which SEBA should redirect its steps in the near future.

Parsimony Analysis of Endemicity (PAE) has been compared with other methods regarding its performance to identify areas of endemism. It is frequently compared with the Analysis of Endemicity (AE), which seems to perform better than PAE to identify these areas. Here I compare PAE and AE considering the sympatric taxa diagnosed as endemic, being as s...

There are some analyses about the impact of climatic change in the distribution of Mexican land mammals. However, this impact has not been analyzed on areas of endemism. For this reason, the aim of this analysis was to determine the climate change effects in the patterns of endemism of the mammals of Mexico, regarding the climatic differences betwe...

p>La identificación de las áreas de endemismo es un paso fundamental en los análisis de biogeografía evolutiva. Las áreas de endemismo han sido definidas por la congruencia de dos o más áreas de distribución, en donde se asume de manera general que los taxones endémicos tienen una respuesta geográfica similar a factores históricos y ambientales. Lo...

The identification of areas of endemism is an essential step in analyses of evolutionary biogeography. Areas of endemism have been defined by the congruency of two or more distributional areas, where there is a general assumption that the endemic taxa have a similar geographic response to historical and environmental factors. Mammals are highly div...

We analyzed whether the spatial variation in mammal species richness reflects the southern boundaries of the Nearctic region as previously established by endemism patterns. Records from 710 mammal species were drawn on a map of North America (from Canada and Alaska to Panama) gridded at 4° latitude-longitude. We evaluated the probable existence of...

PRE-PRINT!!! The global effort to digitize biodiversity occurrence data from collections, museums and other institutions has stimulated the development of important tools to improve the knowledge and conservation of biodiversity. The Global Biodiversity Information Facility (GBIF) enables and opens access to biodiversity data of 321 million of rec...

The global effort to digitize biodiversity occurrence data from collections, museums and other institutions has stimulated the development of important tools to improve the knowledge and conservation of biodiversity. The Global Biodiversity Information Facility (GBIF) enables and opens access to biodiversity data of 321 million of records, from 379...

Escalante, T. et al.: Areas of endemism and thresholds of models 5 junio, 2013 D.R. © TIP Revista Especializada en Ciencias Químico-Biológicas, 16(1):5-17, 2013. We evaluated the relevance of threshold selection in species distribution models on the delimitation of areas of endemism, using as case study the North American mammals. We modeled 40 spe...

Authors consider the problems and challenges involved in the application of the panbiogeographic concept of the node in biogeographic analysis. Specific geomorphological correlations for nodes in Mexico are cited with respect to the Mexican Transition Zone, the Volcanic Belt, and Isthmus of Tehuantepec. The general implications of the nodal approac...

AimOur aim was to analyse the temporal dynamics of areas of endemism of Bursera species (Burseraceae), a dominant element of the Mexican tropical dry forest, between the Last Glacial Maximum (LGM) and the present day. We aimed to identify stable core sectors that have held permanent populations of endemic species. LocationMexican dry forest. Method...

Since the 19th Century, two regions have been recognized for North American mammals, which overlap in Mexico. The Nearctic region corresponds to the northern areas and the Neotropical region corresponds to the southern ones. There are no recent regionalizations for these regions under the criterion of endemism. In the present study, we integrate tw...

We evaluated the relevance of threshold selection in species distribution models on the delimitation of areas of endemism, using as case study the North American mammals. We modeled 40 species of endemic mammals of the Nearctic region with Maxent, and transformed these models to binary maps using four different thresholds: minimum training presence...

The Units for the Conservation, Management and Sustainable Use of Wildlife (UMAs) are instruments of conservation and management of specific species in Mexico. UMAs represent in southeastern Mexico an important way for deer management, but they have major problems related to the monitoring of species. In this paper, we propose a methodology based o...

Atlas biogeográfico de los mamíferos terrestres de América del Norte: una nueva opción en internet

El libro de Moreira-Munoz forma parte de una serie de Springer y esta compuesto de 11 capitulos divididos en 5 partes, incluye mapas, fotografias y figuras en color, ademas de un apendice con la lista de los generos nativos de Chile con su patron distribucional.

Species distribution modelling has been a powerful tool to explore the potential distribution of parasites in wildlife, being the basis of studies on biogeography. Vexillata spp. are intestinal nematodes found in several species of mammalian hosts, such as rodents (Geomyoidea) and hares (Leporidae) in the Nearctic and northern Neotropical regions....

We analyzed the biogeographical patterns of diversity and endemicity of the Mexican mammals, into a quadrat between 15º 30'-21º 00' N latitude and 94º 00'-100º 00' W longitude, in order to identify the Oaxaca-Tehuacanense province as a natural area. We analyzed the records of 133 mammalian species in databases and we modeled their distributions. Us...

The Transmexican Volcanic Belt (TVB) is recognized as a center of diversification, endemism and biogeographic transition. Due to its environmental heterogeneity, complex geological origin and intricate distributional patterns, there is no consensus on its geographic delimitation and the ecological and biogeographic differentiation of its biota. We...