Tracing 4,000 Years of Environmental History in the Cuzco Area, Peru, from the Pollen Record

Chepstow-Lusty, Alex; Bennett, K. D.; Fjeldså, Jon; Kendalls, A.; Galiano, Washington; Herrera, Alfredo Tupayachi

doi:10.2307/3673971

Cited by 82 publications

(35 citation statements)

References 30 publications

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“…The area has been influenced by humans for millennia due to its proximity to the ancient centers of human settlements in the Urubamba Valley [24,25]. During the last decades, human population has strongly increased at low elevations (<3800 m), especially in the valley bottom of the Urubamba River, but the rural areas at high elevations have remained sparsely populated.…”

Section: Study Areamentioning

confidence: 99%

“…Humans have modified the Andean landscape for millennia and have strongly affected vegetation distribution patterns and structure [1, 24,25]. This is particularly true for Polylepis forests and poses a challenge for detecting natural environmental preferences of the forests and for modelling forest distribution.…”

Section: Factors Other Than Topography Determining Polylepis Forest Dmentioning

confidence: 99%

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Elevational Shifts in the Topographic Position of Polylepis Forest Stands in the Andes of Southern Peru

Toivonen

Gonzales‐Inca

Bader

et al. 2017

Forests

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Abstract:The patchy distribution of high-Andean treeline forests has provoked discussion about the relative importance of anthropogenic and climatic causes of this pattern, both of which vary with topography. We aimed to understand the topographic controls on the distribution of Polylepis subsericans treeline forests in the Andes of southern Peru, and the changes in these controls along an elevational gradient. We mapped Polylepis forests in the Cordillera Urubamba, Cusco, using high-resolution aerial images and related forest cover to topographic variables extracted from a digital terrain model (30-m resolution). The variables were selected based on their expected biological relevance for tree growth at high elevations. We constructed logistic regression models of forest cover, separately for each of five 100-m elevational belts. To deal with spatial autocorrelation, models were based on randomized 10% subsampling of the data with 1000 repetitions. The results suggest a consistent shift in topographic preference with elevation, with forests at lower elevations showing a preference for topographically protected sites near rivers and forests at higher elevations being increasingly restricted to north-facing and well-drained sites. Our study offers the first indication of the ability of Andean treeline forests to benefit from the topographic heterogeneity of the high-Andes. Providing that dispersal and establishment are possible, local relocation between microsites could help these forests to persist regionally in spite of changing climatic conditions.

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Section: Study Areamentioning

confidence: 99%

Section: Factors Other Than Topography Determining Polylepis Forest Dmentioning

confidence: 99%

Elevational Shifts in the Topographic Position of Polylepis Forest Stands in the Andes of Southern Peru

Toivonen

Gonzales‐Inca

Bader

et al. 2017

Forests

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show abstract

“…1997; Thompson et al 1988;Kolata 1993Kolata , 1996Chepstow-Lusty et al 1998;Shimada et al 1991). This perspective acknowledges the long-term historical dimension of human-environment relations in the Andes.…”

Section: The L Ake Titicaca Basin: a Precolumbian Built L Andscapementioning

confidence: 96%

“…Anthropogenic processes are secondary to large-scale and long-term natural processes. Human activities are rarely considered as possible explanations of perturbations and discontinuities recorded in sediment and ice cores (e.g., Chepstow-Lusty et al 1998).…”

Section: The L Ake Titicaca Basin: a Precolumbian Built L Andscapementioning

confidence: 99%

12. The Lake Titicaca Basin: A Precolumbian Built Landscape

Erickson¹

2000

Imperfect Balance

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“…La forte diminution de l'influx et de la concentration polliniques avant cette période nous permet de déduire une période de forte sécheresse qui pourrait être à l'origine de la diminution des forêts de Polylepis. Hansen et al, 1984 ;Hansen & Rodbell, 1995 ;Chepstow-Lusty et al, 1998 ;Weng et al, 2004) Thompson et al, 1985 ;Abbott et al, 1997 ;Binford et al, 1997 ;Sterken et al, 2006). Au cours de l'anomalie climatique médiévale (ACM), l'augmentation de l'irradiation solaire et/ou une activité volcanique faible seraient à l'origine de l'augmentation des températures et de la diminution des précipitations (Mann et al, 2005).…”

Section: Analyse Des Archives Sédimentaires à La Recherche Des Liens unclassified

Sociétés andines et changements environnementaux depuis 4 000 ans dans la région du Nevado Coropuna (sud du Pérou)

Kuentz

Thouret

Ledru

et al. 2011

bifea

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Tracing 4,000 Years of Environmental History in the Cuzco Area, Peru, from the Pollen Record

Cited by 82 publications

References 30 publications

Elevational Shifts in the Topographic Position of Polylepis Forest Stands in the Andes of Southern Peru

Elevational Shifts in the Topographic Position of Polylepis Forest Stands in the Andes of Southern Peru

12. The Lake Titicaca Basin: A Precolumbian Built Landscape

Sociétés andines et changements environnementaux depuis 4 000 ans dans la région du Nevado Coropuna (sud du Pérou)

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