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Ecological distribution and population structure of Litsea glaucescens(Lauraceae)in the ravines of Sierra Fría and Sierra Laurel,Central Mexico

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Journal of Mountain Science 2022年第7期19卷 1945-1960页

作者： Mara Irais FLORES-GALLEGOS edmundo garcia-moya Angelica ROMERO-MANZANARES Mario LUNA-CAVAZOS Martin Alfonso MENDOZA-BRISENO Heike VIBRANS Posgrado en Botánica Colegio de PostgraduadosCampus Montecillo.Km 36.5carretera México-TexcocoMontecilloTexcocoEdo.de México56230México Colegio de Postgraduados Campus Veracruz.Carretera Jalapa Veracruz Km 88.5Altamirano91690VeracruzMéxico

Litsea glaucescens Kunth(Mexican bay leaf,laurel)has a wide distribution in Mexico,growing at both riparian and rupicolous environments in the mountainous region of the Central Highlands of the *** Fría-Sierra Laurel is a protected natural area covered by a dry *** Mexican bay leaf is associated with the oak forest,especially on *** species has been considered at risk in recent *** research is focused on analyzing the elements of the environment of the ravines,which are influencing the distribution and establishment of laurel populations in the *** mountainous regions of Aguascalientes were selected,Sierra Fría and Sierra *** ravines of the basin were selected to obtain environmental *** registered were topographic,edaphic,and *** component analysis was used to identify ecological factors associated with the presence of *** bay leaf populations were registered in 10 *** the structural level in the community,29 woody species were registered,Mexican bay leaf had an Importance Value Index of 15.8,ranking 10th among all *** of laurel were classified by size classes(S,individuals with heights ranging from 0 to 20 cm;S,heights ranging from 0.2 to 1.0 m;S,heights between 1 and 2 m with light trace of flowering;S,heights greater than 2 m with flowering greater than 30% of the canopy;and S,individuals with heights greater than 5 m,curved trunk and basal regrowth)to obtain the population *** importance index value for all the species in the riparian community was calculated to the community *** factors that characterized the presence of Mexican bay leaf were a high percentage of rock coverage(90%),less mulch depth,and sandy loam shallow *** that showed higher cation exchange capacity had a higher presence of individuals of the S,S,and Ssize *** Sindividuals were found in shady places with 97% of intercepted *** o

关键词： Dry Forest Ephemeral stream Importance Value Index Mexican bay leaf Population structure Principal Component Analysis

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Reciprocal Effects of Plant-Soil Relationships at Two Spatial Scales in a Semiarid Land of Central Mexico

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Journal of Agricultural Science and Technology(A) 2012年第1期2卷 71-79页

作者： Francisco Martin Huerta-Martinez Alejandro Mufioz-Urias Cecilia Neri-Luna Claudia Aurora Uribe-Mu edmundo garcia-moya Departamento de Ecologia Centro Universitario de Ciencias Biol6gicas y Agropecuarias Universidad de Guadalajara Zapopan Jalisco C.P. Mexico Instituto de Recursos Naturales Colegio de Postgraduados Montecillo Edo. de Mexico C.P 56230 Mexico

We studied the influence of soil heterogeneity on plant community structure in a semiarid region of Central Mexico using Bray-Curtis Ordination. The results showed that some edaphic factors, such as soil depth, organic matter, and potassium and calcium content, explained 80% of the total variation in structure of the studied communities. We found that soil resources were heterogeneously distributed in the study area, indicating that the edaphic variables considered in this study explain the existing plant community variability, moreover the presence of some shrubs as Krameria cytisoides influences the soil properties, suggesting that there is a reciprocal effect between plant and soil.

关键词： Ordination vegetation soil Chihuahuan Desert.

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