Charcoal morphotypes and potential fuel types from a Mexican lake during MIS 5a and MIS 3
Por:
Torres-Rodriguez, Esperanza, Figueroa-Rangel, Blanca L., Lozano-Garcia, Socorro, Ortega-Guerrero, Beatriz, Caballero-Miranda, Margarita, Herrejon-Serrano, Alonso
Publicada:
1 abr 2022
Resumen:
Charcoal particles vary in size and form, but they can preserve
morphological characteristics used to infer the type of vegetation being
burnt. To deduce potential fuel and fire type, we reconstructed local
fire activity analyzing macrocharcoal morphologies and pollen data of
the sediment core CHA08-V from Lake Chalco from the sub-stage MIS 5a to
MIS 3, with CHAR data and Z-Score analysis. We identified the following
fuel types: i) wood, characterized by blocky and quadrilateral
morphologies with solid, foliated or striated surface textures; ii)
grass, represented by rectangular-porous and rectangular-latticed
morphologies; and iii) herbs, characterized by long-thin filaments and
polygonal porous particles. Arboreal pollen components were associated
to wood morphotypes whereas non-arboreal pollen related to herbs and
grass morphotypes, indicating that variation in vegetation composition
was important regulating factor determining fire types in the Basin of
Mexico. This study provides the first long-term record of charcoal
morphotypes for Mexico region to emphasize the importance of charcoal
morphotypes analyses to complement paleoenvironmental interpretation of
past fire regimes.
Filiaciones:
Torres-Rodriguez, Esperanza:
Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, CP 04510, Mexico
Figueroa-Rangel, Blanca L.:
Universidad de Guadalajara, Centro Universitario de la Costa Sur. Instituto Manantlán de Ecología y Conservación de la Biodiversidad, Apartado postal 108 Jalisco, Autlán, 48900, Mexico
Lozano-Garcia, Socorro:
Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, CP 04510, Mexico
Ortega-Guerrero, Beatriz:
Instituto de Geofísica, Universidad Nacional Autónoma de Mexico, Ciudad Universitaria, Ciudad de Mexico, CP 04510, Mexico
Caballero-Miranda, Margarita:
Instituto de Geofísica, Universidad Nacional Autónoma de Mexico, Ciudad Universitaria, Ciudad de Mexico, CP 04510, Mexico
Herrejon-Serrano, Alonso:
Licenciatura en Biología. Universidad Simón Bolivar. Av. Río Mixcoac, No. 48, Col. Insurgentes, Mixcoac Ciudad de Mexico, Benito Juárez, CP 03920, Mexico
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