Suchergebnisse

Contrary to ingrained academic and public assumptions, wherein indigenous lowland South American societies are viewed as the product of historical emplacement and spatial stasis, there is widespread evidence to suggest that migration and displacement have been the norm, and not the exception. This original and thought-provoking collection of case studies examines some of the ways in which migration, and the concomitant processes of ecological and social change, have shaped and continue to shape human-environment relations in Amazonia. Drawing on a wide range of historical time frames (from pre-conquest times to the present) and ethnographic contexts, different chapters examine the complex and important links between migration and the classification, management, and domestication of plants and landscapes, as well as the incorporation and transformation of environmental knowledge, practices, ideologies and identities

Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. The sensitivity of tropical forest carbon to climate is a key uncertainty in predicting global climate change. Although short-term drying and warming are known to affect forests, it is unknown if such effects translate into long-term responses. Here, we analyze 590 permanent plots measured across the tropics to derive the equilibrium climate controls on forest carbon. Maximum temperature is the most important predictor of aboveground biomass (-9.1 megagrams of carbon per hectare per degree Celsius), primarily by reducing woody productivity, and has a greater impact per °C in the hottest forests (>32.2°C). Our results nevertheless reveal greater thermal resilience than observations of short-term variation imply. To realize the long-term climate adaptation potential of tropical forests requires both protecting them and stabilizing Earth's climate.