Herpetofauna diversity and microenvironment correlates across a pasture–edge–interior ecotone in tropical rainforest fragments in the Los Tuxtlas Biosphere Reserve of Veracruz, Mexico

2006 ◽  
Vol 132 (1) ◽  
pp. 61-75 ◽  
Author(s):  
J. Nicolás Urbina-Cardona ◽  
Mario Olivares-Pérez ◽  
Víctor Hugo Reynoso
Keyword(s):  
Tropical Rainforest ◽  
Biosphere Reserve ◽  
Los Tuxtlas

scholarly journals Vertical and Horizontal Trophic Networks in the Aroid-Infesting Insect Community of Los Tuxtlas Biosphere Reserve, Mexico

Insects ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 252
Author(s):  
Guadalupe Amancio ◽  
Armando Aguirre-Jaimes ◽  
Vicente Hernández-Ortiz ◽  
Roger Guevara ◽  
Mauricio Quesada
Keyword(s):  
Altitudinal Gradient ◽  
Tropical Rainforest ◽  
Biosphere Reserve ◽  
Species Interaction ◽  
Interaction Networks ◽  
Los Tuxtlas ◽  
Insect Community ◽  
High Turnover ◽  
Trophic Networks ◽  
Pollination Systems

Insect-aroid interaction studies have focused largely on pollination systems; however, few report trophic interactions with other herbivores. This study features the endophagous insect community in reproductive aroid structures of a tropical rainforest of Mexico, and the shifting that occurs along an altitudinal gradient and among different hosts. In three sites of the Los Tuxtlas Biosphere Reserve in Mexico, we surveyed eight aroid species over a yearly cycle. The insects found were reared in the laboratory, quantified and identified. Data were analyzed through species interaction networks. We recorded 34 endophagous species from 21 families belonging to four insect orders. The community was highly specialized at both network and species levels. Along the altitudinal gradient, there was a reduction in richness and a high turnover of species, while the assemblage among hosts was also highly specific, with different dominant species. Our findings suggest that intrinsic plant factors could influence their occupation, and that the coexistence of distinct insect species in the assemblage could exert a direct or indirect influence on their ability to colonize such resources.

Disentangling the effects of legacies from those of current land use on soil properties in Los Tuxtlas Biosphere Reserve, Mexico

2020 ◽  
Vol 153 ◽  
pp. 103578 ◽  
Author(s):  
Simoneta Negrete-Yankelevich ◽  
Carlos Andrés Cultid-Medina ◽  
Tajín Fuentes-Pangtay ◽  
Javier Álvarez-Sánchez ◽  
Silke Cram ◽  
...  
Keyword(s):  
Land Use ◽  
Soil Properties ◽  
Biosphere Reserve ◽  
Los Tuxtlas

scholarly journals Angiosperms, Los Tuxtlas Biosphere Reserve, Veracruz, Mexico

Check List ◽  
2009 ◽  
Vol 5 (4) ◽  
pp. 787 ◽  
Author(s):  
Víctor Arroyo-Rodríguez ◽  
Jacob C. Dunn ◽  
Julieta Benítez-Malvido ◽  
Salvador Mandujano
Keyword(s):  
Introduced Species ◽  
Plant Diversity ◽  
Biosphere Reserve ◽  
Los Tuxtlas ◽  
Check List ◽  
Forest Reserve ◽  
Field Station ◽  
Breast Height ◽  
Mexican Government ◽  
Different Levels

The Los Tuxtlas Reserve has been heavily deforested and fragmented since the 1970’s. Although the flora of Los Tuxtlas has been described previously, most floristic lists come from the large forest reserve of the Los Tuxtlas field station. Here we present a check list of Angiosperms recorded in 45 rainforest fragments (< 1 to 266 ha) located in three landscapes with different levels of deforestation. We sampled all trees, shrubs, lianas, palms and herbs with diameter at breast height (dbh) Ā 2.5 cm within ten 50 m x 2 m plots per fragment. We recorded 9,435 plants belonging to 73 families and 372 species. Fabaceae, Rubiaceae, and Moraceae were best represented. Eight species are classified as Endangered by the Mexican government, and five are human-introduced species. We conclude that the conservation and restoration of all the remaining rainforest fragments are necessary to effectively preserve the plant diversity of this region.

scholarly journals Mamíferos de la Reserva de la Biósfera El Triunfo, Chiapas.

2014 ◽  
Vol 3 (1) ◽  
pp. 79 ◽  
Author(s):  
Eduardo Espinoza Medinilla ◽  
Alberto Anzures Dadda ◽  
Epigmenio Cruz Aldan
Keyword(s):  
Biosphere Reserve ◽  
Los Tuxtlas ◽  
Sierra Madre ◽  
Management Plans ◽  
Conservation Concern

Resumen. Se elaboró una lista de los mamíferos silvestres de la Reserva de la Bíosfera "El Triunfo". Se colectaron en campo, entre mayo de 1994 y agosto de 1996, 136 ejemplares (píel y cráneo), 72 huellas en molde de yeso y 25 restos óseos. También se consultaron las bases de datos de nueve museos nacionales y extranjeros en los que existen 528 registros para la reserva. Se registraron 112 especies, 75 géneros, 26 familias y 10 órdenes. El 86.6% de las especies pertenecen a los órdenes Chiroptera, Rodentia y Carnivora. Así mismo 39 especies están clasificadas con alguna categoría de riesgo. Comparada con Los Tuxtlas, El Ocote y Montes Azules, El Triunfo tiene el menor porcentaje de similitud de especies (indice de Szymkiewicz-Simpson). Los datos aportados por el estudio pueden ser de utilidad en los planes de manejo de la reserva, pero deben ser completados con investigación sobre distribución y abundancia en diferentes tipos de vegetación.Abstract. We compiled a checklist ofwild mammals from "El Triunfo" Biosphere Reserve. From May 1994 to August 1996 we collected 136 specimens (skin and skull), 72 footprints gypsum molds and 25 fragments osseous. Were reviewed also data of9 Mexican and foreign museums in which 528 records are present. The checklist is composed of 112 species, 75 genus, 26 families and 10 orders. 86.6% of these species belong to Chiroptera, Rodentia and Carnívora Orders. 39 species are cIassified in one of the categories of conservation concern. Compared with Los Tuxtlas, El Ocote and Montes Azules reserves, the mastofauna richness of "El Triunfo", has the lowest percentage of similarity among species (Szymkiewicz-Simpson' s index). The data obtained from this survey, can be used as part ofthe management plans of this reserve. However must be completed with research about distribution and abundance in several kinds of vegetation.Palabras clave: El Triunfo, mamíferos, diversidad, conservación, Síerra Madre de Chiapas.

Morphological and molecular assessment of the diversity of trematode communities in freshwater gastropods and bivalves in Los Tuxtlas tropical rainforest

2021 ◽  
Vol 95 ◽  
Author(s):  
Y. Velázquez-Urrieta ◽  
G. Pérez-Ponce de León
Keyword(s):  
Tropical Rainforest ◽  
Life Cycles ◽  
Phylogenetic Position ◽  
Los Tuxtlas ◽  
Intermediate Hosts ◽  
High Vertebrate ◽  
Freshwater Gastropods ◽  
Genetic Lineages ◽  
Molecular Assessment

Abstract Trematode life cycles involve molluscs as first intermediate hosts. The identification of trematodes based on the morphology of cercariae released from molluscs is challenging because the identification relies on adult forms obtained from their definitive hosts. Several studies have recently genetically characterized these larval forms establishing a link with adults sampled from their vertebrate hosts, allowing their identification at species level. In Los Tuxtlas tropical rainforest, in south-eastern Mexico, 57 species of trematodes have been reported from wildlife vertebrates; however, studies evaluating the diversity of trematode cercariae in molluscs are lacking. Here, we studied 11 species of molluscs to assess the diversity of cercariae in two lakes of Los Tuxtlas, Veracruz, Mexico; six of the 11 species were infected. Twelve cercarial morphotypes were collected and characterized morphologically. Sequences of the 28S ribosomal RNA gene were generated to allocate each morphotype into a family using the most recent phylogenetic classification of the Digenea as a framework; molecular work revealed 16 genetic lineages; some cercariae were identified up to genus (Apharyngostrigea, Ascocotyle, Centrocestus, Echinochasmus, Lecithodendrium and Posthodiplostomum), and some to species levels (Gorgoderina rosamondae, Langeronia macrocirra, Oligogonotylus manteri and Phyllodistomum inecoli) based on their phylogenetic position within the tree, and the genetic distance with respect to other sequenced congeners. Therefore, the cercarial morphotypes in the present study represent at least 16 putative species. Our study contributes to a better understanding of the trematode diversity in an area of high vertebrate species diversity, and to the knowledge of trematode life cycles.

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