木炭形态作为八个世纪以来墨西哥中东部火灾燃料类型和火灾事件的指标

IF 1.9 3区 地球科学 Q3 GEOGRAPHY, PHYSICAL
Esperanza Torres-Rodríguez, Blanca L. Figueroa-Rangel, Margarita Caballero, Daisy Valera-Fernández, Daniela López-Méndez, Socorro Lozano-García
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引用次数: 0

摘要

对热带中生植物生态系统中火和木炭生产的研究为这些系统的生态和气候历史提供了有价值的见解。不同的植被产生不同形式和大小的木炭,这影响了木炭的分散,并提供了火灾动力学的关键信息。在这项研究中,我们使用了从墨西哥中东部的Atezca湖提取的大约850年的沉积木炭记录来重建火灾活动的历史,包括频率和强度。我们提出了关于木炭形态的创新信息,以解释火灾制度,识别被烧毁的植被类型并分析人类的影响。结果揭示了西班牙征服期间火灾制度的转变,从与土著农业密集木材燃烧相关的局部尺度燃烧过渡到以燃烧草药和草为特征的区域尺度燃烧,与广泛放牧的扩张有关。这种转变反映在木炭的减少和小颗粒的增加,以及沉积物中钛的增加,表明更大的景观变化。自前西班牙时代以来,阿特兹卡湖的火灾演变主要是由人类活动驱动的,尽管气候因素,如严重干旱,也可能影响火灾活动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Charcoal morphotypes as indicators of fire fuel types and fire events along eight centuries in east-central Mexico

The study of fire and charcoal production in tropical mesophytic ecosystems provides valuable insights into the ecological and climatic history of these systems. The diverse vegetation produces charcoal in various forms and sizes, which influences its dispersion and provides key information about fire dynamics. In this study, we used an approximately 850-year sedimentary charcoal record extracted from Lake Atezca in east-central Mexico to reconstruct the history of fire activity, including frequency and intensity. We present innovative information on charcoal morphotypes to interpret fire regimes, identify the types of vegetation burned and analyze human impact. The results reveal a shift in fire regimes during the Spanish Conquest, transitioning from local-scale burning associated with intensive wood burning for indigenous agriculture to regional-scale burning characterized by the burning of herbs and grasses linked to the expansion of extensive livestock grazing. This transition is reflected in the decrease of wood charcoal and the increase of smaller particles, as well as in the rise in titanium in the sediments, indicating greater landscape alteration. The evolution of fire regimes in Lake Atezca was driven primarily by human activities since pre-Hispanic times, although climatic factors, such as severe droughts, may have also influenced fire activity.

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来源期刊
Journal of Quaternary Science
Journal of Quaternary Science 地学-地球科学综合
CiteScore
4.70
自引率
8.70%
发文量
82
审稿时长
6-12 weeks
期刊介绍: The Journal of Quaternary Science publishes original papers on any field of Quaternary research, and aims to promote a wider appreciation and deeper understanding of the earth''s history during the last 2.58 million years. Papers from a wide range of disciplines appear in JQS including, for example, Archaeology, Botany, Climatology, Geochemistry, Geochronology, Geology, Geomorphology, Geophysics, Glaciology, Limnology, Oceanography, Palaeoceanography, Palaeoclimatology, Palaeoecology, Palaeontology, Soil Science and Zoology. The journal particularly welcomes papers reporting the results of interdisciplinary or multidisciplinary research which are of wide international interest to Quaternary scientists. Short communications and correspondence relating to views and information contained in JQS may also be considered for publication.
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