Griselda Escalona‐Segura

El Colegio de la Frontera Sur

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Jorge Albino Vargas Contreras

Autonomous University of Campeche

Alexis Herminio Plasencia-Vázquez

Autonomous University of Campeche

Jaime Rendón–von Osten

Autonomous University of Campeche

A. Townsend Peterson

University of Kansas

Adolfo G. Navarro‐Sigüenza

Universidad Nacional Autónoma de México

Eduardo E. Iñigo Elías

Cornell University

Anay Serrano-Rodríguez

El Colegio de la Frontera Sur

Merle M. Borges-Ramírez

El Colegio de la Frontera Sur

Salima Machkour‐M’Rabet

El Colegio de la Frontera Sur

Esperanza Huerta Lwanga

El Colegio de la Frontera Sur

Cooperative Institutions

El Colegio de la Frontera Sur

Universidad Nacional Autónoma de México

Instituto de Ecología

Autonomous University of Campeche

Wageningen University & Research

Universidad Michoacana de San Nicolás de Hidalgo

Instituto Politécnico Nacional

Universidad de Morelia

American Museum of Natural History

Universidad de Ciencias y Artes de Chiapas

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Organochlorine pesticides, polycyclic aromatic hydrocarbons, metals and metalloids in microplastics found in regurgitated pellets of black vulture from Campeche, Mexico

The Science of The Total Environment (2021)

Merle M. Borges-Ramírez Griselda Escalona‐Segura Esperanza Huerta Lwanga Eduardo E. Iñigo-Elias Jaime Rendón–von Osten

Vulture

Lindane

10.1016/j.scitotenv.2021.149674

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Citations (51)

The Chimalapas Region, Oaxaca, Mexico: a high-priority region for bird conservation in Mesoamerica

Bird Conservation International (2003)

A. Townsend Peterson Adolfo G. Navarro‐Sigüenza Blanca E. Hernández‐Baños Griselda Escalona‐Segura Fanny Rebón-Gallardo

The Chimalapas region, in eastern Oaxaca, Mexico, holds lowland rainforests, tropical dry forests, and cloud forests typical of the Neotropics, as well as montane pine and pine-oak forests more typical of the Nearctic. Totaling more than 600,000 ha, much of the region is forested, and in a good state of preservation. The Chimalapas avifauna is by far the most diverse for any region of comparable size in the country, totalling at least 464 species in the region as a whole (with more than 300 species in the lowland rainforest) representing 44% of the bird species known from Mexico. Within the region, the humid Atlantic lowlands hold 317 species, the montane regions 113 species, and the southern dry forested lowlands 216 species. Important species present in the region include Harpy Eagle Harpia harpyja and several other large eagles, Black Penelopina nigra and probably Horned Oreophasis derbianus Guans, Scarlet Macaw Ara macao , Cinnamon-tailed Sparrow Aimophila sumichrasti , Rose-bellied Bunting Passerina rositae , and Resplendent Quetzal Pharomachrus mocinno . The area holds immense lowland rainforests and cloud forests that rank among the largest and best preserved in all of Mesoamerica, including a complete lowland-to-highland continuum, with entire watersheds preserved more or less intact.

Mesoamerica

Cloud forest

Tropical rain forest

Nearctic ecozone

10.1017/s0959270903003186

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Citations (39)

Presence of Pesticides and Toxicity Assessment of Agricultural Soils in the Quintana Roo Mayan Zone, Mexico Using Biomarkers in Earthworms (Eisenia fetida)

Water Air & Soil Pollution (2019)

Moises Andrade-Herrera Griselda Escalona‐Segura Maurício González-Jaurégui Rafael Reyna‐Hurtado Jorge Albino Vargas Contreras

Eisenia fetida

Oligochaeta (plant)

Eisenia andrei

10.1007/s11270-019-4105-1

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Citations (8)

Refugios diurnos del murciélago Rhynchonycteris naso (Chiroptera: Emballonuridae) en Laguna de Términos, Campeche, México

Revista de Biología Tropical (2020)

Karla P. Borges-Jesús José D. Cú-Vizcarra Griselda Escalona‐Segura Jorge Albino Vargas Contreras

Introducción: La selección de refugios diurnos es un proceso crucial para los murciélagos debido a su influencia en la ecología, organización social y supervivencia de sus poblaciones. El murciélago narigón (Rhynchonycteris naso) es una especie protegida por leyes de México, cuyos refugios y zonas de forrajeo, están estrictamente asociados a cuerpos de agua, principalmente ríos. Por lo tanto, cambios en la calidad del agua suponen un riesgo para sus poblaciones. Sin embargo, el conocimiento sobre el estado actual de sus poblaciones y refugios diurnos en México, es escaso. Objetivo: Ubicar y describir los refugios diurnos de R. naso y evaluar la relación del tamaño del grupo de murciélagos con las características de los refugios, la salinidad y el pH del agua donde habitan. Métodos: De marzo a octubre 2015, se realizaron búsquedas de refugios diurnos mediante recorridos en lancha a lo largo de ríos, arroyos y lagunas, en once sitios del Área de Protección de Flora y Fauna Laguna de Términos, Campeche México. Por cada refugio localizado se registró el tamaño del grupo y su acomodo en el refugio, el tipo de refugio, el tipo de vegetación, la cobertura, la distancia entre refugios, el diámetro del tronco, la salinidad y el pH. Para investigar el efecto de las variables registradas en los refugios sobre el tamaño de cada grupo, se ajustaron Modelos Lineales Generalizados. Resultados: Encontramos 48 refugios en troncos secos, cortezas de árboles y puentes, asociados a cuerpos de agua dulce y oligohalina, principalmente en vegetación de manglar. El promedio (± EE) del tamaño del grupo fue de 5.3 ± 0.48 para los refugios naturales y de 22.6 ± 9.54 para los artificiales. Encontramos una relación significativa con el tipo de refugio, el tipo de vegetación y el diámetro del tronco. Los refugios con tamaño de grupo mayores presentaron un acomodo agregado. Se localizaron 40 refugios sobre cuerpos de agua dulce y ocho en oligohalina con alto nivel de agrupamiento. Conclusiones: La mayor incidencia de refugios en sitios de agua dulce y ligeramente ácida, es explicada bajo la teoría del óptimo forrajeo. Debido a que el área de estudio se encuentra en el límite de su distribución, el manglar representa el tipo de vegetación más importante para garantizar la permanencia de las poblaciones de R. naso. Adicionalmente, debido a que en algunas porciones de la zona de estudio no fue posible encontrar refugios, es crucial llevar a cabo estudios sobre la calidad del agua y los niveles de contaminación en la región. Este estudio proporciona información relevante sobre las poblaciones del murciélago Rhynchonycteris naso con implicaciones directas sobre su conservación en zonas ribereñas y humedales costeros.

10.15517/rbt.v69i1.43595

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Citations (1)

Conflicto socioecológico en la cueva “El Volcán de los Murciélagos”, Calakmul, México

Sociedad y Ambiente (2022)

Ana Rosa Heredia-Lara Griselda Escalona‐Segura Jorge Albino Vargas Contreras

El futuro de los recursos naturales depende de nuestro proceder, particularmente bajo los términos legales y de conservación de la biodiversidad. En este artículo analizamos la situación legal de las tierras del área donde se encuentra la cueva “El Volcán de los Murciélagos”, con base en las leyes vigentes a nivel estatal y federal. Se examinaron los documentos del proceso de litigio del Registro Agrario Nacional y el proceso se analizó a la luz de los principios de la teoría de la trampa socioecológica y la tragedia de los comunes para explicar la consecuencia de la adquisición de bienes por parte de la Fundación y los beneficios pobremente redituables para el Comisariado de Hopelchén, concluyéndose que los ejidatarios cayeron en una trampa socioecológica al considerar que la aportación económica ofrecida por la Fundación los ayudaría a tener una calidad de vida mejor, al acrecentar sus bienes. Se generó un conflicto y rescisión de contrato de usufructo, poniendo en riesgo a la cueva “El Volcán de los Murciélagos” y su entorno, lo cual puede dar cabida a una tragedia de los recursos comunes. Para preservar el área, las autoridades deben aplicar las leyes ambientales, y quien o quienes sean los dueños deben respetarlas.

10.31840/sya.vi25.2590

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Citations (0)

Morphospecies Abundance of Above-Ground Invertebrates in Agricultural Systems under Glyphosate and Microplastics in South-Eastern Mexico

Environments (2021)

Hernández-Gutiérrez Edilberto Jaime Rendón–von Osten Griselda Escalona‐Segura Jorge Mendoza‐Vega Ricardo Dzul-Caamal

Soil invertebrates are important for diverse soil ecosystem services, which are jeopardized by pesticides and microplastics. In the present study, we aimed to assess above-ground invertebrates’ morphospecies abundance in the presence of glyphosate (GLY), its main metabolite aminomethylphosphonic acid (AMPA), and microplastics (MPs). Three land-use systems were analyzed: agricultural systems with and without plastic mulch and pesticides (AwPM, AwoPM) and natural unmanaged farming systems (UF). Soil GLY, AMPA, MP concentrations and above-ground invertebrates were quantified. GLY concentrations were also assessed inside invertebrate tissues. GLY, AMPA and the highest concentration of GLY in invertebrates’ tissue were found only in AwoPM at 0.14–0.45 mg kg−1, 0.12–0.94 mg kg−1 and 0.03–0.26 mg kg−1, respectively. MPs were present as follows: AwPM system (100%, 400–2000 particles kg−1) > AwoPM (70.8%, 200–1000 particles kg−1) > UF (37.5%, 200–400 particles kg−1). No significant correlations were found between soil MPs, GLY and AMPA. There was a significant correlation between MPs and morphospecies from the order Entomobrymorpha (Collembola, R = 0.61, p < 0.05). Limnophila, Mesogastropoda (Gastropoda) and Siphonaptera morphospecies were only present in the UF system. GLY in invertebrate tissue was inversely correlated with soil GLY (R = −0.73, p < 0.05) and AMPA (R = −0.59, p < 0.05). Further investigations are required to understand these phenomena.

Agroecosystem

Aminomethylphosphonic acid

10.3390/environments8110130

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Citations (8)

Caracterización del área de distribución geográfica potencial de las especies de aves psitácidas de la Península de Yucatán, México

DOAJ (DOAJ: Directory of Open Access Journals) (2014)

Alexis Herminio Plasencia-Vázquez Griselda Escalona‐Segura

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The relationship between forest fragmentation and the potential geographical distribution of psittacids (Psittaciformes: Psittacidae) in the Yucatan Peninsula, Mexico

Revista de Biología Tropical (2017)

Alexis Herminio Plasencia-Vázquez Griselda Escalona‐Segura Yarelys Ferrer‐Sánchez

Parrots are a seriously threatened group because of the illegal pet trade, their habitat fragmentation and the destruction of tropical forests. This study aimed to determine the relationship between forest fragmentation and the geographic potential distribution of parrot species in the Yucatan Peninsula, Mexico. The research was carried out in the Mexican portion of the Yucatan Peninsula Biotic region, which includes the states of Campeche, Quintana Roo and Yucatan. We worked with the eight species of psittacids that inhabit the selected areas: Eupsittula nana, Amazona albifrons, Amazona xantholora, Amazona autumnalis, Pionus senilis, Pyrilia haematotis, Amazona oratrix and Amazona farinosa. For these species, we used the potential geographical distribution maps that were obtained through the Maximum Entropy algorithm, published in 2014. To measure the levels of forest fragmentation in the Peninsula, we employed the land use and vegetation maps from series IV (2007-2010) of the National Institute of Statistics and Geography. We calculated different landscape metrics at 100 sites randomly distributed within the predicted presence and absence areas for the species. Multivariate methods were used to shorten dimensionality in the analysis, as well as to explore the observed patterns. We did not find any pattern regarding the number of variables that contribute to the logistic regression models (LR) and the size of the parrots’ potential geographical distribution area within the Peninsula. For Pyrilia haematotis and Amazona oratrix, the fragmentation variables used did not seem to have any relationship with their potential geographical distribution in the Peninsula (intersection, Pr < 0.0001). Only for Eupsittula nana, Amazona xantholora and Pionus senilis, we found that the mean patch edge, the mean shape index and the mean perimeter-area ratio were important to determine their potential distribution patterns, respectively; and, in general, the variables indicated the preferences of these parrots to occupy larger habitat patches. Parrots must be given a special care and protection within the states of Campeche and Quintana Roo, since there are areas with high parrot diversity and are importantly affected by human activities. The best recommendation for managers and users of protected areas within the Yucatan Peninsula is that extensive areas of forest should be maintained in order to guarantee the suvival of psittacid populations.

Fragmentation

Peninsula

Yucatan peninsula

Environmental niche modelling

10.15517/rbt.v65i4.26482

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Citations (2)

Breeding Phenology and Nesting Success of the Yucatan Wren in the Yucatan Peninsula, Mexico

The Wilson Journal of Ornithology (2010)

Jesús Vargas-Soriano Javier Salgado Ortíz Griselda Escalona‐Segura

The Yucatan Wren (Campylorhynchus yucatanicus) is a highly restricted endemic species inhabiting the coastal scrub at the northern portion of the Yucatan Peninsula. We describe the breeding phenology and nesting success of this endangered species from April to September 2007 for a population at Ria Celestun Biosphere Reserve. We found 232 nests of which only 110 (47%) were active at either incubation or nestling stages. Yucatan wrens initiated nest building in late April, but clutch initiation occurred in early June and lasted until the end of July, resulting in a breeding season of 2 months. Nests were exclusively in coastal scrub and the transition between coastal scrub and black mangrove (Avicennia germinans) forest. Eleven species of trees were used as nesting substrate, but three included 75% of all nests found. Clutch size (x¯ ± SD) was 3 ± 1.5 eggs with incubation and nestling periods averaging 16 ± 1.0 days, and 16.5 ± 1.9 days, respectively. Mayfield estimates of daily survival rate for incubation and nestling periods were 0.968 ± 0.005 and 0.975 ± 0.005, respectively with nesting success of 46%. The average number of fledglings per successful nest was 2.5 ± 1.3. Predation was the main cause of nest mortality accounting for 54% of the active nests. Parental care was provided by both parents, but participation of a third individual feeding nestlings was recorded at three nests, providing evidence for occasional cooperative breeding. Increasing human development in the coastal region of the Yucatan Peninsula may represent a serious threat to conservation of the Yucatan Wren due to habitat restriction and high dependency on three species of trees as nesting substrate.

Avian clutch size

Nesting season

Yucatan peninsula

10.1676/08-164.1

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Citations (8)

Underlying and proximate drivers of biodiversity changes in Mesoamerican biosphere reserves

Proceedings of the National Academy of Sciences (2024)

Daniel Auliz-Ortiz Julieta Benítez‐Malvido Víctor Arroyo‐Rodríguez Rodolfo Dirzo Miguel Ángel Pérez‐Farrera

Protected areas are of paramount relevance to conserving wildlife and ecosystem contributions to people. Yet, their conservation success is increasingly threatened by human activities including habitat loss, climate change, pollution, and species overexploitation. Thus, understanding the underlying and proximate drivers of anthropogenic threats is urgently needed to improve protected areas’ effectiveness, especially in the biodiversity-rich tropics. We addressed this issue by analyzing expert-provided data on long-term biodiversity change (last three decades) over 14 biosphere reserves from the Mesoamerican Biodiversity Hotspot. Using multivariate analyses and structural equation modeling, we tested the influence of major socioeconomic drivers (demographic, economic, and political factors), spatial indicators of human activities (agriculture expansion and road extension), and forest landscape modifications (forest loss and isolation) as drivers of biodiversity change. We uncovered a significant proliferation of disturbance-tolerant guilds and the loss or decline of disturbance-sensitive guilds within reserves causing a “winner and loser” species replacement over time. Guild change was directly related to forest spatial changes promoted by the expansion of agriculture and roads within reserves. High human population density and low nonfarming occupation were identified as the main underlying drivers of biodiversity change. Our findings suggest that to mitigate anthropogenic threats to biodiversity within biosphere reserves, fostering human population well-being via sustainable, nonfarming livelihood opportunities around reserves is imperative.

Biodiversity hotspot

Overexploitation

Defaunation

10.1073/pnas.2305944121

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Citations (9)