Habitat Heterogeneity and Seed Dispersal of Opuntia streptacantha (Cactaceae) in Nopaleras of Central Mexico

1992 ◽  
Vol 37 (4) ◽  
pp. 379 ◽  
Author(s):  
M. C. Vargas-Mendoza ◽  
M. Gonzalez-Espinosa
Keyword(s):  
Seed Dispersal ◽  
Habitat Heterogeneity ◽  
Central Mexico

scholarly journals Fine‐scale habitat heterogeneity and vole runways influence seed dispersal in Plagiobothrys nothofulvus

2020 ◽  
Vol 107 (3) ◽  
pp. 413-422 ◽  
Author(s):  
Monica R. Grasty ◽  
Pamela G. Thompson ◽  
Elizabeth C. Hendrickson ◽  
Avery E. Pheil ◽  
Mitchell B. Cruzan
Keyword(s):  
Seed Dispersal ◽  
Habitat Heterogeneity ◽  
Fine Scale

scholarly journals Seed dispersal by rivers in tropical dry forests: An overlooked process in tropical central Mexico

2018 ◽  
Vol 29 (1) ◽  
pp. 62-73 ◽  
Author(s):  
Karen A. Esper-Reyes ◽  
Néstor A. Mariano ◽  
Raúl E. Alcalá ◽  
Jaime R. Bonilla-Barbosa ◽  
Gabriel Flores-Franco ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Tropical Dry Forests ◽  
Central Mexico ◽  
Dry Forests

scholarly journals Habitat heterogeneity facilitates coexistence of two syntopic species of Peromyscus in a temperate forest of Central México

Therya ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 487-500
Author(s):  
Ivan Mijail De-la-Cruz ◽  
Alondra Castro-Campillo ◽  
Arturo Salame-Méndez
Keyword(s):  
Habitat Heterogeneity ◽  
National Park ◽  
Temperate Forest ◽  
Habitat Preferences ◽  
Plant Species Richness ◽  
Central Mexico ◽  
Sampling Station ◽  
Soil P ◽  
Microhabitat Heterogeneity ◽  
Dry And Rainy Seasons

An essential topic in ecology is to understand how the structure of the habitat and its changes in space and time (i. e., habitat heterogeneity) affect the frequency and interactions between cohabiting species.  Here, we assessed the effect of the biotic and abiotic components that configure the microhabitat heterogeneity and its temporal shifts (dry and rainy seasons), on the frequency (total and by sex) of two congeneric species, Peromyscus difficilis and P. melanotis, that co-occurs in a temperate forest of Central Mexico.  To address this, an experimental plot composed of 120 sampling stations was placed within a temperate forest in the National Park Desierto de los Leones, Mexico City.  In each sampling station, we set Sherman traps to capture mice of two syntopic Peromyscus, and we also evaluated six variables related to the spatial heterogeneity of the habitat during two rainy seasons.  Our results revealed differential effects of habitat heterogeneity on the frequency of each species.  Moreover, habitat heterogeneity also had a different effect on male and female frequencies of each Peromyscus species.  While P. difficilis was captured more frequently in sampling stations with high presence and coverage of logs in the soil, P. melanotis was regularly captured in sampling stations with high vegetation cover and plant species richness.  Thus, it seems that the different requirements and habitat preferences of these two Peromyscus species facilitate their spatial and temporal coexistence in this mid-latitude temperate forest.  In general, we provide evidence of the importance of studying the heterogeneity of the habitat to better understand the interactions between syntopic species, offering new insights into the spatial and temporal mechanisms that could determine its coexistence at local scale.

Ultrastructure of the effect of T-514 obtained from Karwinskia humboldtiana on assembly and integrity of yeast's peroxisomes

1991 ◽  
Vol 49 ◽  
pp. 136-137
Author(s):  
J. Sepulveda-Saavedra ◽  
I. Vander-Klei ◽  
M. Venhuis ◽  
Y. Piñeyro-Lopez
Keyword(s):  
Culture Conditions ◽  
Toxic Effects ◽  
Candida Boidinii ◽  
Central Mexico ◽  
Poisonous Plant ◽  
Biological Behaviour ◽  
Enzyme Content ◽  
Fat Deposits ◽  
Yeast Model

Karwinskia humboldtiana is a poisonous plant that grows in semi desertic areas in north and central México. It produces several substances with different toxic effects. One of them designated T-514 damages severely the lung, kidney and liver, producing in the hepatoeyte large intracellular fat deposits and necrosis. Preliminary observations demonstrated that three is a decrease in the amount of peroxisomes in the hepatocytes of experimentally intoxicated rats and monkeys. To study the effect exerted by the T-514 on peroxisomes, a yeast model was selected, thus, three species: Saccha romices cerevisiae, Ilansenula polymorpha and Candida boidinii were used, because there is information concerning their peroxisome's morphology, enzyme content, biological behaviour under different culture conditions and biogenesis.

FRUGIVORIA E DISPERSÃO DE SEMENTES POR PEIXES

2008 ◽  
Vol 1 (1) ◽  
pp. 7-18
Author(s):  
Luciane Lopes de Souza
Keyword(s):  
Sustainable Development ◽  
Seed Dispersal ◽  
Tropical Forests ◽  
Natural Regeneration ◽  
Main Species ◽  
Fishing Gears ◽  
Solimões River

Biotic or abiotic processes of seed dispersal are important for the maintenance of the diversity, and for the natural regeneration in tropical forests. Ichthyochory is one of the fundamental mechanisms for seed dispersal in flooded environments, as the “igapó” forests. A study on the ichthyochory of the igapós was conducted at Amanã Sustainable Development Reserve, in the middle Solimões river, from June 2002 to September 2004. Monthly samples of frugivorous fish were taken, with the main fishing gears used locally. Guts of 1,688 fish caught were examined. The main species were Myloplus rubripinnis (29.21%), Hemiodus immaculatus (18.96%),Colossoma macropom um (16.23%) and Mylossoma duriventre (16.05%). The diet was made of vegetables (fruits, leave and flowers), and animals (arthropods). 53.02% of all fish caught ingested fruits. The total number of intact seeds in the stomachs and intestines were 8,069 and 5,763 respectively. About 61.9% of the Brycon melanopterus (matrinchão), 46.34% of the Brycon amazonicus (mamuri) and 30.22% of M . rubripinnis (parum ) analysed had intact seeds in their guts. Seeds of Nectandra amazonum and Genipa spruceana ingested proved to be more viable than those non-ingested by fish. The high rates of frugivory, the presence of intact seeds in the guts of fish and the greater viability of ingested seeds all suggest that these animals are important seed dispersors in the “igapó” forests of Amanã Reserve.

Exploring Cycling Practices in Central Mexico through a Local Repair Shop

Transfers ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 109-115
Author(s):  
Aryana Soliz
Keyword(s):  
Central Mexico ◽  
Repair Shop ◽  
Local Repair

Population Density of Unirrigated Maize and its Influence Upon Fertilizer Efficiency in Central Mexico

1950 ◽  
Vol 14 (C) ◽  
pp. 270-275 ◽  
Author(s):  
Eilif V. Miller ◽  
John B. Pitner ◽  
Ricardo Villa J. ◽  
Carlos Romo G.
Keyword(s):  
Population Density ◽  
Fertilizer Efficiency ◽  
Central Mexico
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