basin of mexico
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2021 ◽  
pp. 1-20
Author(s):  
Alexandra Biar

Abstract The island nature of the Aztec capital, Tenochtitlan, is an under-studied aspect in our understanding of this unique urban space, located in the Mexican highlands of Mesoamerica. The island location induces cross-links from aquatic and terrestrial paths to create connectivity and continuity within the lacustrine cultural landscape of the Basin of Mexico during the Postclassic period (a.d. 900–1521). Although Cortés described this city as the “Venice of the New World,” no specific and systematic investigation of facilities related to water transport has been carried out. In this article, I fill this gap through a study of navigation routes which were conceived to facilitate the continuous movement of people and goods through the numerous canals crisscrossing the Aztec capital, and which are identifiable by means of anthropic markers that respond to functional needs. Transition zones (piers, quays, shoreline areas), coordination zones (ports), and activity zones (customs facilities, warehouses, bridges, sacred sites) are all related to the practice of water transport and intimately related to terrestrial roads. I identify and locate these areas using a multidisciplinary methodology based on archaeological data, ethnohistorical testimonies, and pictographic and iconographic documents.


Author(s):  
Verónica Pérez Rodríguez

Urban societies have been defined as stratified, and sometimes literate, societies that build large, densely populated, and monumental centers that serve specialized political, economic, and ritual functions for their regions. Mesoamerica is one of six world regions where urban societies developed, independently, in antiquity. Mesoamerican cities sometimes fit traditional definitions, and other times defy them. There are examples of dispersed low-density urban settlements (Classic Maya, Veracruz) or cities where evidence of writing remains elusive (Teotihuacan). Functional urban definitions have led to debates regarding the urban standing of earlier, Middle Formative Olmec centers, as no contemporary settlements match the monumentality and regional prominence of La Venta or San Lorenzo. The regional settlement studies that have proliferated in the Basin of Mexico and Valley of Oaxaca since the 1960s have helped scholars demonstrate the demographic and political might of Late Formative, Classic, and Postclassic cities such as Monte Albán, Teotihuacan, and Tenochtitlan. Urbanism was demonstrably shown to be a regional phenomenon, one that developed from autochthonous processes as settlements became prominent population centers whose functions, monuments, and institutions served and ruled over their larger regions. While some of the best-known Mesoamerican cities were the capitals of large regional states (Teotihuacan, Tenochtitlán, Monte Albán, and Tzintzuntzan), researchers have documented an even greater number of city-states, which are defined as small states socially and territorially centered around their capital city. The Classic and Postclassic cities of the Maya lowlands, the Postclassic polities or altepemeh of the Basin of Mexico, and the kingdoms of Postclassic Oaxaca are examples of city-states. Among Mesoamerican cities, there was diversity in the form of government, ranging from cities where rulers’ names and royal tombs appear prominently in the archaeological record (Classic Maya cities, Postclassic Oaxacan city-states), to cities where, despite decades of research, no single royal palace or tomb has been found (Teotihuacan). The material record of cities of the latter type suggests that they were governed through more corporate forms of political organization. In the early 21st century research has focused on the role of collectives in city construction, configuration, and governance and the challenge of archaeologically identifying neighborhoods, districts, or other suprahousehold social groups (tlaxilacalli and calpolli, social units above the household in Postclassic Nahuatl polities). Although Classic period Maya centers were not originally considered urban, thanks to settlement studies and, later on, LiDAR technology, scholars have demonstrated that beyond their monumental acropolises there was extensive low-density settlement that was unmistakably urban. The Maya model of low-density lowland urbanism features dispersed populations and extensive urban footprints that integrate complex webs of agricultural areas, terraces, raised fields, hydraulic features, and house mounds. This model may have useful applications for modern-day planning efforts in low-lying cities that need to adapt to climate change. Indeed, Mesoamerican urbanism has much to contribute as the world’s population becomes increasingly urban. Humanity must learn from its past successes, and failures, with urban living.


2021 ◽  
pp. 1-23
Author(s):  
Eduardo Williams

Abstract Common salt, or sodium chloride, has always been a strategic resource of primary importance throughout the world. In pre-Hispanic Mesoamerica, salt was used primarily for human consumption, as the native diet had little chloride or sodium, two chemical components that are indispensable for human health and nutrition. Here I discuss the traditional salt industries of Michoacán, Colima, Guerrero, the Basin of Mexico and Puebla, paying special attention to the production sites and the tool assemblages linked to salt production in these areas of Mesoamerica. This article sheds light on salt's role in the culture and history of the ancient Mesoamerican ecumene through the lens of ethnoarchaeology and ethnohistory.


2021 ◽  
pp. 278-303
Author(s):  
Guillermo Acosta-Ochoa ◽  
Emily McClung de Tapia ◽  
Joaquín Arroyo-Cabrales
Keyword(s):  

2021 ◽  
Vol 4 ◽  
Author(s):  
Victor Hugo Salinas Camarillo ◽  
Javier Carmona-Jiménez ◽  
Nelida Abarca ◽  
Jonas Zimmermann ◽  
Demetrio Mora

In central Mexico, streams flow from mountain protected areas at high elevations, i.e. abive 2,400 m a.s.l., being exposed to different human activities along their course. The main human threats of these aquatic ecosystems include the presence of hydraulic infrastructure (e.g. canals and dams), the construction of bridges or roads, fish farming, agriculture, livestock, unregulated tourism or irregular human settlements, resulting in nutrient enrichment, organic pollution and low hydromorphological quality. Diatoms, widely recognized as valuable indicators of environmental conditions, offer a unique opportunity to assess the ecological quality of the streams in and around this megacity, as they respond directly and sensitively to specific physical, chemical and biological changes. To conduct ecological assessment, the composition of diatom communities has traditionally been characterized by morphological methods and most recently by environmental DNA (eDNA) metabarcoding. However, the diatom communities of only a few of these streams in the Basin of Mexico have been characterized morphologically at low resolution light microscopy (LM), and no eDNA-based studies have been conducted yet. In this context, our aims are to 1) implement morphological and eDNA metabarcoding methods for the identification and quantification of epilithic diatoms and to assess their seasonal and spatial response in three peri-urban mountain streams from the Basin of Mexico, and 2) develop a metric to assess and monitor the ecological quality in these streams. For this purpose, we characterized a) the physical, environmental and hydro-morphological conditions related to ecosystem quality, and b) the diatom diversity and community structure of nine sites per stream (27 sites). The sites include headwaters, as well as middle and lower reaches with different land-use and anthropologic pressures, and were investigated over three hydrological periods, i.e. post-rainy, dry-cold and dry-warm. Species identification was first conducted under LM and scanning electron microscopy (SEM), and is currently been done by eDNA metabarcoding of the V4 region of the 18S rRNA gene and a fragment of the chloroplast marker rbcL. Our study has resulted in 520 infrageneric taxa identified by LM and SEM, the largest diversity ever found for freshwater diatoms of Mexico. From this data, we found a clear environmental gradient from almost pristine conditions towards heavily polluted states as the streams enter the city. These changes are well reflected by variations in the diatom community structure, as revealed by the Diatom Ecological Quality Index (DEQI), newly developed to evaluate the ecological quality of the streams in and around this megacity.


Author(s):  
L.R. Martínez-Abarca ◽  
S. Lozano-García ◽  
B. Ortega-Guerrero ◽  
C.M. Chávez-Lara ◽  
E. Torres-Rodríguez ◽  
...  

2021 ◽  
Vol 61 ◽  
pp. 101263
Author(s):  
Sofía I. Pacheco-Forés ◽  
Christopher T. Morehart ◽  
Jane E. Buikstra ◽  
Gwyneth W. Gordon ◽  
Kelly J. Knudson

2021 ◽  
pp. 1-16
Author(s):  
Carlos E. Cordova ◽  
Luis Morett-Alatorre ◽  
Charles Frederick ◽  
Lorena Gámez-Eternod

Abstract In the territories of the former lakes in the Basin of Mexico, a tlatel was an insular settlement associated with the exploitation of lacustrine resources. This study examines the stratigraphy and geomorphological context of three tlateles in the eastern part of the former Lake Texcoco and correlates their phases of development with regional paleoclimatic trends from the seventh century b.c. to the sixteenth century. The results of this research indicate that fluvio-lacustrine (i.e., deltaic) sedimentation and freshwater springs in the lake basin were important features for the establishment of tlatel settlements in the highly dynamic and saline lacustrine environment. The formation and abandonment of the studied tlateles correlate with changes in other settlements and developments recorded in other parts of Lake Texcoco. Sites and sediments in the eastern part of Lake Texcoco provide proxy information on the lacustrine changes that accompanied the development of Tenochtitlan and other lacustrine settlements in its western part.


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