A palaeoecological perspective on the transformation of the tropical Andes by early human activity
Rattachement africain : us, gb, nl, ec. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Palaeoecological records suggest that humans have been in the Andes since at least 14 000 years ago. Early human impacts on Andean ecosystems included an increase in fire activity and the extinction of the Pleistocene megafauna. These changes in Andean ecosystems coincided with rapid climate change as species were migrating upslope in response to deglacial warming. Microrefugia probably played a vital role in the speed and genetic composition of that migration. The period from ca 14 500 to 12 500 years ago was when novel combinations of plant species appeared to form no-analogue assemblages in the Andes. By 12 000 years ago most areas in what are today the Andean grasslands were being burned and modified by human activity. As the vegetation of these highland settings has been modified by human activity for the entirety of the Holocene, they should be regarded as long-term manufactured landscapes. The sharp tree lines separating Andean forests from grasslands that we see today were probably also created by repeated burning and owe their position more to human-induced fire than climatic constraints. In areas that were readly penetrated by humans on the forested slopes of the Andes, substantial modification and settlement had occurred by the mid-Holocene. In hard-to-reach areas, however, the amount of human modification may always have been minimal, and these slopes can be considered as being close to natural in their vegetation. This article is part of the theme issue ‘Tropical forests in the deep human past’.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- A palaeoecological perspective on the transformation of the tropical Andes by early human activity
- Date Crossref
- 07/03/2022
- Éditeur
- The Royal Society
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Florida Institute of Technology pays non établi dans la noticeUniversité ou école supérieure
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University of Reading Department of Geography and Environmental Science pays non établi dans la noticeUniversité ou école supérieure
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University of Amsterdam Department of Ecosystem and Landscape Dynamics pays non établi dans la noticeUniversité ou école supérieure
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Universidad Regional Amazónica IKIAM pays non établi dans la noticeUniversité ou école supérieure
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Institute for Global Ecology pays non établi dans la noticeStructure de recherche
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Facultad de Ciencias de la Tierra y Agua pays non établi dans la noticeInstitution
Florida Institute of Technology, Department of Geography and Environmental Science — University of Reading et Department of Ecosystem and Landscape Dynamics — University of Amsterdam, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.