scholarly journals Los Hongos micorrizógenos arbusculares de la región de Nizanda, Oaxaca, México

2017 ◽  
pp. 131 ◽  
Author(s):  
Patricia Guadarrama-Chávez ◽  
Sara Lucía Camargo-Ricalde ◽  
Laura Hernández-Cuevas ◽  
Silvia Castillo-Argüero
Keyword(s):  
New Records ◽  
Tropical Dry Forest ◽  
Soil Samples ◽  
Dry Forest ◽  
Secondary Vegetation ◽  
The Family ◽  
Dry Seasons ◽  
Corn Fields

Twenty five species and seven genera of micorrhizal arbuscular fungi (AMF) are reported for the region of Nizanda, Oaxaca, Mexico. To this end, soil samples were taken randomly, during the rainy and the dry seasons, in corn fields, secondary vegetation areas, as well as in primary tropical dry forest. Spores were isolated, identified and propagation pots were set. The family Glomeraceae accounted for 44% of the species, followed by Acaulosporaceae (24%) and Gigasporaceae (20%). In the corn fields 13 species were found, 24 in secondary vegetation, and 12 in the tropical dry forest. Among these, Glomus dussi, G. verruculosum, Pacispora scintillans and Scutellospora erythropa are new records for Mexico. G. constrictum was encountered only in the corn fields, whereas Acaulospora delicata, A. foveata, A. mellea, A. scrobiculata, Entrophospora infrequens, Gigaspora decipiens, Glomus claroideum, G. fulvum and G. geosporum occurred in the three environments. No species were restricted to the tropical dry forest.

scholarly journals Nuevos registros de tayra (Eira barbara) y ocelote (Leopardus pardalis) en una selva baja caducifolia de Yucatán, México.

2019 ◽  
Vol 9 (2) ◽  
pp. 55
Author(s):  
Julio C. Hernández-Hernández ◽  
Alvaro Monter-Pozos ◽  
Rafael Villegas-Patraca
Keyword(s):  
New Records ◽  
Tropical Dry Forest ◽  
Coastal Region ◽  
Camera Traps ◽  
Camera Trapping ◽  
Dry Forest ◽  
Leopardus Pardalis ◽  
Biological Corridors ◽  
Secondary Vegetation ◽  
Eira Barbara

ResumenEl tayra (Eira barbara) y el ocelote (Leopardus pardalis) son dos especies que se encuentran catalogadas en peligro de extinción. En este trabajo presentamos nuevos registros de ambas especies en la región litoral centro del estado de Yucatán, México. Nuestras observaciones se basan en registros obtenidos mediante cámaras trampa colocadas en fragmentos de vegetación secundaria de selva baja caducifolia (SBC) con cierto grado de perturbación. Obtuvimos dos registros de tayra, en uno de ellos se aprecian dos individuos y seis fotografías de ocelote. Estos registros muestran la importancia de los manchones de sbc como potenciales refugios, corredores biológicos o sitios de paso para las especies silvestres.Palabras clave: Cámaras-trampa, Carnívora, nuevos registros, Yucatán.AbstractThe tayra (Eira barbara) and ocelot (Leopardus pardalis) are species that are cataloged in danger of extinction. In this work we present new records of both species in the central coastal region of Yucatan state, Mexico. Our observations are based on records using camera traps, placed in fragments of secondary vegetation in tropical dry forest (TDF) with some degree of disturbance. We obtained two records of tayra, one of them shows two individuals, in addition to six photographs of ocelot. These records denote the importance of tdf patches as potential shelters, biological corridors or wildlife passage sites.Key words: Camera-trapping, Carnivore, new records, Yucatan.

Seasonal variation of bat-flies (Diptera: Streblidae) in four bat species from a tropical dry forest

Mammalia ◽  
2018 ◽  
Vol 82 (2) ◽  
pp. 133-143 ◽  
Author(s):  
Valeria B. Salinas-Ramos ◽  
Alejandro Zaldívar-Riverón ◽  
Andrea Rebollo-Hernández ◽  
L. Gerardo Herrera-M
Keyword(s):  
Seasonal Variation ◽  
Tropical Dry Forest ◽  
Dry Forest ◽  
Significant Information ◽  
Bat Flies ◽  
Host Parasite Interactions ◽  
Dry Seasons ◽  
Bat Fly ◽  
Host Parasite ◽  
Wet And Dry Seasons

AbstractSeasonality of climate promotes differences in abundance and species composition of parasites, affecting host-parasite interactions. Studies have reported seasonal variation in bat-flies, which are obligate bat ectoparasites. We characterized the bat-fly load of three insectivores [Pteronotus davyi(Gray),Pteronotus parnellii(Gray) andPteronotus personatus(Wagner)] and one nectarivorous [Leptonycteris yerbabuenae(Martínez and Villa-R.)] bat species in a tropical dry forest to test the existence of seasonality in response to the availability of resources during the wet and dry seasons. We collected 3710 bat-fly specimens belonging to six species and two genera from 497 bats. Most of the ectoparasite load parameters examined (mean abundance, mean intensity, richness, etc.), including comparisons among reproductive conditions and sex of the host, were similar in both seasons. Prevalence was the parameter that varied the most between seasons. The six bat-fly species were found in all bat species exceptP. personatus. The latter species andL. yerbabuenaehad four and five bat-fly species in the wet and dry seasons, respectively. This study provides significant information of ectoparasites ecology in relation to seasonality, contributes to the understanding of host-parasite relationships in tropical dry forests and discusses the relevance of the abiotic and biotic factors that could impact host-parasite interactions.

Behavioral responses to seasonality by two Sceloporine lizard species from a tropical dry forest

2010 ◽  
Vol 60 (1) ◽  
pp. 97-113 ◽  
Author(s):  
Marciano Valtierra-Azotla ◽  
Bradford Lister ◽  
Andrés García
Keyword(s):  
Seasonal Changes ◽  
Rainy Season ◽  
Tropical Dry Forest ◽  
Behavioral Responses ◽  
Dry Forest ◽  
Behavioral Strategies ◽  
Lizard Species ◽  
Western Mexico ◽  
Dry Seasons ◽  
Resource Levels

AbstractWe investigated behavioral responses of two lizards, Sceloporus melanorhinus and S. utiformis, to environmental seasonality in a tropical dry forest of western Mexico. We conducted focal observations of individuals in the field during both the rainy and dry seasons and compared perch use, foraging and social behaviors and displacement activity within and between species. Our results indicate that seasonal changes occur in the behavior and activity of both male and female S. melanorhinus and S. utiformis. Feeding frequency, social displays, and distances travelled increased significantly in both species during the rainy season. These seasonal changes tended to be more pronounced in the arboreal species; S. melanorhinus. Surprisingly, female S. melanorhinus perched higher than males during the rainy season. Most of the observed changes are similar to the responses to seasonality observed in other lizards, both for species that exist within our study area, and for species that inhabit other seasonal environments in tropical and temperate ecosystems. Thus, the seasonal patterns in behavior documented in this study may represent a general set of behavioral strategies that allow lizards to better adapt to seasonal fluctuations in their environment, such as changes in predation pressure, variation in resource levels, and differences in insolation, temperature, and moisture levels.

scholarly journals Diversity of the Family Cerambycidae (Coleoptera) of the Tropical Dry Forest of Mexico, I. Sierra de Huautla, Morelos

2002 ◽  
Vol 95 (5) ◽  
pp. 617-627 ◽  
Author(s):  
Felipe A. Noguera ◽  
Santiago Zaragoza-Caballero ◽  
John A. Chemsak ◽  
Alicia Rodríguez-Palafox ◽  
Enrique Ramírez ◽  
...  
Keyword(s):  
Tropical Dry Forest ◽  
Dry Forest ◽  
The Family

The six-eyed sand spiders of the genus Sicarius (Araneae: Haplogynae: Sicariidae) from the Brazilian Caatinga

Zootaxa ◽  
2013 ◽  
Vol 3599 (2) ◽  
pp. 101-135 ◽  
Author(s):  
IVAN L. F. MAGALHÃES ◽  
ANTONIO D. BRESCOVIT ◽  
ADALBERTO J. SANTOS
Keyword(s):  
New Species ◽  
Natural History ◽  
Mating Behavior ◽  
Clutch Size ◽  
New Records ◽  
Tropical Dry Forest ◽  
Dry Forest ◽  
The World ◽  
Three New Species ◽  
And Behavior

In this paper we revise the species of Sicarius (Araneae: Sicariidae) from the Brazilian Caatinga, the largest tropical dry forest nucleus in the world. We redescribe, designate a neotype and provide new records for Sicarius tropicus (Mello- Leitão, 1936), the only species previously known from the region, and describe three new species: S. cariri n. sp., S. diadorim n. sp. and S. ornatus n. sp. We report high intraspecific variation in the genitalic morphology of these species, especially in females. We also provide anecdotal observations on natural history and behavior of these species, including diet, mating behavior and clutch size. We include an identification key for Brazilian Caatinga species of Sicarius.

scholarly journals New records of Tropical Dry Forest´s mammals from the State of Mexico

2004 ◽  
Vol 6 (1) ◽  
pp. 90
Author(s):  
Cuauhtémoc Chávez Tovar ◽  
Gerardo Jorge Ceballos González
Keyword(s):  
New Records ◽  
Tropical Dry Forest ◽  
The State ◽  
Dry Forest ◽  
Palabras Clave

Palabras clave: Estado de México, registros, murciélagos, roedores, Myotis carteri.Key words: State of Mexico, records, bats, rodents, Myotis carteri.

scholarly journals El género Rhytidhysteron (Dothideomycetes, Ascomycota) en México

2020 ◽  
Author(s):  
Aurora Cobos Villagrán ◽  
César Hugo Hernández Rodríguez ◽  
Ricardo Valenzuela ◽  
Lourdes Villa-Tanaca ◽  
Rosa Paulina Calvillo-Medina ◽  
...  
Keyword(s):  
New Species ◽  
New Records ◽  
Tropical Dry Forest ◽  
Dry Forest ◽  
Taxonomic Review ◽  
Species Taxonomy ◽  
A New Species ◽  
High Diversity

Resumen: Antecedentes y Objetivos: Actualmente, se reconocen 21 especies adscritas al género Rhytidhysteron. En México sólo se ha reportado Rhytidhysteron rufulum. El género se caracteriza por sus histerotecios naviculares a apoteciales, el borde es estriado o liso; los colores del epitecio varían de anaranjado-rojizo, amarillo, verde a negros y las ascosporas presentan tres septos longitudinales. El objetivo del presente estudio es realizar una revisión taxonómica del género Rhytidhysteron en México, basada en caracteres macro y micromorfológicos.Métodos: Se realizaron diez exploraciones entre 2017 y 2019 en diversas regiones de México. Además, se revisaron los especímenes depositados en la colección de hongos del herbario ENCB. Los ejemplares fueron estudiados, descritos y determinados de acuerdo con las técnicas tradicionales en micología. Resultados clave: Se revisaron 381 especímenes pertenecientes al género Rhytidhysteron, de los cuales se determinaron cuatro especies: Rhytidhysteron neohysterinum, una nueva especie para la ciencia, R. neorufulum y R. thailandicum que son nuevos registros para el país, y R. rufulum previamente citado.Conclusiones: El género Rhytidhysteron tiene una alta diversidad de especies en México. La mayoría de los especímenes se han encontrado sobre ramas en descomposición, principalmente en géneros de la familia Fabaceae en bosque tropical caducifolio, lo que podría sugerir que este grupo de plantas representa el microhábitat al que las especies de Rhytidhysteron se han adaptado.Palabras clave: distribución, histerotecio, Hysteriales, nueva especie, taxonomía. Abstract:  Background and Aims: Currently, 21 species associated with the genus Rhytidhysteron are recognized. In Mexico, only Rhytidhysteron rufulum has been reported. The genus is characterized by its navicular to apotecial histerothecia, the margin is striate or smooth; the colours of the epithecium vary from orange-reddish, yellow, green to black and its ascospores present three longitudinal septa. The objective of this study is to carry out a taxonomic review of the genus Rhytidhysteron in Mexico, based on macro- and micromorphological characters.Methods: Ten exploration trips were realized between 2017 to 2019 in several regions of Mexico. In addition, the specimens deposited in the fungus collection of the ENCB herbarium were reviewed. The specimens were studied, described and determined according to traditional mycological techniques.Key results: 381 specimens belonging to the genus Rhytidhysteron were reviewed, of which four species were determined: R. neohysterinum, a new species for science, R. neorufulum and R. thailandicum, new records for the country, and the previously cited R. rufulum.Conclusions: The genus Rhytidhysteron has a high diversity of species in Mexico. Most specimens have been found on decomposing branches, mainly of genera of the Fabaceae family in tropical dry forest, which suggest that this group of plants represent the microhabitat to which Rhytidhysteron species have best adapted.Key words: distribution, Hysteriales, hysterothecium, new species, taxonomy.

scholarly journals Aspergillus and Penicillium (Eurotiales: Trichocomaceae) in soils of the Brazilian tropical dry forest: diversity in an area of environmental preservation

2016 ◽  
Vol 64 (1) ◽  
pp. 45 ◽  
Author(s):  
Renan Do Nascimento Barbosa ◽  
Jadson Diogo Pereira Bezerra ◽  
Phelipe Manoel Oller Costa ◽  
Nelson Correia de Lima-Júnior ◽  
Ivana Roberta Gomes Alves de Souza Galvão ◽  
...  
Keyword(s):  
Tropical Dry Forest ◽  
Culture Collection ◽  
Soil Samples ◽  
Dry Forest ◽  
Dry Forests ◽  
Complex Biological System ◽  
Environmental Preservation ◽  
Forest Diversity ◽  
Sabouraud Agar ◽  
Evenness Indices

Soil is a complex biological system that plays a key role for plants and animals, especially in dry forests such as the Caatinga. Fungi from soils, such as Aspergillus and Penicillium, can be used as bioindicators for biodiversity conservation. The aim of this study was to isolate and identify species of Aspergillus and Penicillium in soil, from the municipalities of Tupanatinga and Ibimirim, with dry forests, in the Catimbau National Park. Five collections were performed in each area during the drought season of 2012, totaling 25 soil samples per area. Fungi were isolated by suspending soil samples in sterile distilled water and plating on Sabouraud Agar media plus Chloramphenicol and Rose Bengal, and Glycerol Dicloran Agar. Isolates were identified by morphological taxonomy in the Culture Collection Laboratory and confirmed by sequencing of the Internal Transcribed Spacer of rDNA. A total of 42 species were identified, of which 22 belong to the genus Aspergillus and 20 to Penicillium. Penicillium isolates showed uniform distribution from the collecting area in Tupanatinga, and the evenness indices found were 0.92 and 0.88 in Tupanatinga and Ibimirim, respectively. Among isolates of Aspergillus evenness, the value found in Tupanatinga (0.85) was very close to that found in Ibimirim (0.86). High diversity and low dominance of fungi in soil samples was observed. These results contributed to the estimation of fungal diversity in dry environments of the Caatinga, where diversity is decreasing in soils that have undergone disturbance.

scholarly journals Floristic diversity and stocking rate in tropical dry forest secondary vegetation used for grazing

2020 ◽  
Vol 23 ◽  
pp. e01088
Author(s):  
Osmar Espinosa-Palomeque ◽  
Gonzalo Castillo-Campos ◽  
Lucrecia Arellano ◽  
Ponciano Pérez-Hernández ◽  
Silvia López-Ortíz
Keyword(s):  
Tropical Dry Forest ◽  
Dry Forest ◽  
Floristic Diversity ◽  
Stocking Rate ◽  
Secondary Vegetation

scholarly journals Hymenochaete liliae (Agaricomycetes, Fungi), a new species from the state of Oaxaca, Mexico

2021 ◽  
Author(s):  
Magdalena Contreras Pacheco ◽  
Tania Raymundo ◽  
Leticia Pacheco ◽  
Silvia Bautista-Hernández ◽  
Ricardo Valenzuela
Keyword(s):  
New Species ◽  
Tropical Dry Forest ◽  
Optical Microscope ◽  
The State ◽  
Dry Forest ◽  
Fresh Material ◽  
The Family ◽  
Thin Walled ◽  
A New Species

Background and Aims: Hymenochaete is the genus with the highest number of species of the family Hymenochaetaceae in Mexico; 25 species have been described. It is characterized by its mainly resupinate basidiome, although it may be pileate and stipitate, of brown colors, with presence of setae and xanthocroid reaction. The objective of this study is to describe a new species of Hymenochaete.Methods: The fresh material was studied and described macro and micromorphologically, using a stereoscopic and optical microscope, taking photos in situ. Vouchers of the herbaria ENCB y FCME were studied, and specialized literature was reviewed for its description.Key results: Hymenochaete liliae sp. nov. is characterized by a resupinate, adnate, fleshy basidiome, smooth hymenophore, with numerous setae, determinate margin, abrupt, with monomitic hyphal system, simple septae; abundant subfusiform setae in the hymenium, 69-80 × 6-8 µm, acute, with crystals; and ellipsoid basidiospores, thin-walled, 5-8 × 2-3 µm. Although it resembles H. rhabarbarina, it can be differentiated by setae covered with crystals and spores of 4.8-6 × 2.3-3.3 µm. It could also be confused with H. minuscula due to its basidiome color; however, the setae are smaller (40-60 µm), as well as the basidia (15-20 µm). It can be separated from H. cinnamomea because it does not present a stratose basidiome; setae with crystals, 69-80 × 6-8 µm; basidiospores 5-8 × 2-3 µm, ellipsoidal.Conclusions: Hymenochaete liliae is proposed as a new species, which is distributed in the tropical dry forest of the state of Oaxaca, and until now only reported from the type locality.

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