By Robin L. Chazdon
whilst human actions lead to large fragmentation and deforestation, tropical forests display an outstanding ability for common and human-aided regeneration. even though those broken landscapes can take centuries to regain the features of previous progress, Chazdon exhibits the following that regenerating—or second-growth—forests are very important, dynamic reservoirs of biodiversity and environmental providers. what's extra, they consistently have been.
With chapters at the roles those forests play in carbon and nutrient biking, maintaining biodiversity, offering bushes and non-timber items, and built-in agriculture, Second progress not purely bargains a radical and wide-ranging review of successional and recovery pathways, but additionally underscores the necessity to preserve, and additional learn, regenerating tropical forests in an try and motivate a brand new age of neighborhood and worldwide stewardship.
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Extra resources for Second Growth: The Promise of Tropical Forest Regeneration in an Age of Deforestation
In the eastern Brazilian Amazon at Carajas, Pará State, reduced precipitation led to the replacement of forest by open savanna, but forest returned to the region during the late Holocene (Mayle and Power 2008). Evergreen moist forests of the Upper Beni region of Bolivia were not replaced by savanna, despite frequent fire during early and mid-Holocene drought periods (Urrego et al. 2012). Similar shifts occurred in the northern Amazon, leading to the expansion of gallery forests within the Colombian llanos savannas (Behling and Hooghiemstra 2000), and in the campos of southern Brazil, where Araucaria forests expanded during the late Holocene (Behling 1997).
See Piperno and Becker 1996; Bush and Silman 2008; Barlow et al. 2012; McMichael, Piperno, et al. 2012). The complex history of human impacts on tropical forests can be reconstructed by tracing the history of human colonization and occupation throughout the tropics (Hayashinda 2005; Williams 2008). 1). Prior to the spread of agriculture, early hunter-gatherers began to alter forests, disperse key food plants, and hunt certain species to extinction. The origins and spread of agriculture during the Holocene led to increased human populations and to growing demands for food, leading to extensive land clearance and biomass burning in many tropical regions.
A large number of raisedfield complexes may have been constructed in the flat zones of Quintana Roo and the northeastern part of the Petén in Guatemala and in northern Belize (Turner 1978; Pohl and Bloom 1996). Intensive wetland agriculture using the chinampas system, raised fields built from canal excavation and dredging, was widely developed by the Aztecs in the basin of Mexico and the PueblaTlaxcala basin during the Late and Middle Classic Periods (AD 400–900). Prehistoric Landscape Transformation and Tropical Forest Regeneration : 35 These fields covered an area of about 12,000 hectares around the Aztec capital of Tenochtitlán (Denevan 1992b).