Woody vegetation dynamics in the tropical and subtropical Andes from 2001 to 2014: Satellite image interpretation and expert validation.

T. Mitchell Aide, H. Ricardo Grau, Jordan Graesser, Maria Jose Andrade-Nuñez, Ezequiel Aráoz, Ana P. Barros, Marconi Campos-Cerqueira, Eulogio Chacon-Moreno, Francisco Cuesta, Raul Espinoza, Manuel Peralvo, Molly H. Polk, Ximena Rueda, Adriana Sanchez , Kenneth R. Young, Lucía Zarbá, Karl S. Zimmerer

Resultado de la investigación: Contribución a RevistaArtículo

Resumen

The interactions between climate and land‐use change are dictating the distribution of flora and fauna and reshuffling biotic community composition around the world. Tropical mountains are particularly sensitive because they often have a high human population density, a long history of agriculture, range‐restricted species, and high‐ beta diversity due to a steep elevation gradient. Here we evaluated the change in distribution of woody vegetation in the tropical Andes of South America for the pe‐ riod 2001–2014. For the analyses we created annual land‐cover/land‐use maps using MODIS satellite data at 250 m pixel resolution, calculated the cover of woody vege‐ tation (trees and shrubs) in 9,274 hexagons of 115.47 km2, and then determined if there was a statistically significant (p < 0.05) 14 year linear trend (positive—forest gain, negative—forest loss) within each hexagon. Of the 1,308 hexagons with signifi‐ cant trends, 36.6% (n = 479) lost forests and 63.4% (n = 829) gained forests. We esti‐ mated an overall net gain of ~500,000 ha in woody vegetation. Forest loss dominated the 1,000–1,499 m elevation zone and forest gain dominated above 1,500 m. The most important transitions were forest loss at lower elevations for pastures and crop‐ lands, forest gain in abandoned pastures and cropland in mid‐elevation areas, and shrub encroachment into highland grasslands. Expert validation confirmed the ob‐ served trends, but some areas of apparent forest gain were associated with new shade coffee, pine, or eucalypt plantations. In addition, after controlling for elevation and country, forest gain was associated with a decline in the rural population. Although we document an overall gain in forest cover, the recent reversal of forest gains in Colombia demonstrates that these coupled natural‐human systems are highly dy‐ namic and there is an urgent need of a regional real‐time land‐use, biodiversity, and ecosystem services monitoring network.
Idioma originalEnglish (US)
Número de páginas15
PublicaciónGlobal Change Biology
Fecha en línea anticipadamar 2019
DOI
EstadoPublished - 2019

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Aide, T. Mitchell ; Grau, H. Ricardo ; Graesser, Jordan ; Andrade-Nuñez, Maria Jose ; Aráoz, Ezequiel ; Barros, Ana P. ; Campos-Cerqueira, Marconi ; Chacon-Moreno, Eulogio ; Cuesta, Francisco ; Espinoza, Raul ; Peralvo, Manuel ; Polk, Molly H. ; Rueda, Ximena ; Sanchez , Adriana ; Young, Kenneth R. ; Zarbá, Lucía ; Zimmerer, Karl S. / Woody vegetation dynamics in the tropical and subtropical Andes from 2001 to 2014: Satellite image interpretation and expert validation. En: Global Change Biology. 2019.
@article{b4b2913c43f34669920a9942d79a66a0,
title = "Woody vegetation dynamics in the tropical and subtropical Andes from 2001 to 2014: Satellite image interpretation and expert validation.",
abstract = "The interactions between climate and land‐use change are dictating the distribution of flora and fauna and reshuffling biotic community composition around the world. Tropical mountains are particularly sensitive because they often have a high human population density, a long history of agriculture, range‐restricted species, and high‐ beta diversity due to a steep elevation gradient. Here we evaluated the change in distribution of woody vegetation in the tropical Andes of South America for the pe‐ riod 2001–2014. For the analyses we created annual land‐cover/land‐use maps using MODIS satellite data at 250 m pixel resolution, calculated the cover of woody vege‐ tation (trees and shrubs) in 9,274 hexagons of 115.47 km2, and then determined if there was a statistically significant (p < 0.05) 14 year linear trend (positive—forest gain, negative—forest loss) within each hexagon. Of the 1,308 hexagons with signifi‐ cant trends, 36.6{\%} (n = 479) lost forests and 63.4{\%} (n = 829) gained forests. We esti‐ mated an overall net gain of ~500,000 ha in woody vegetation. Forest loss dominated the 1,000–1,499 m elevation zone and forest gain dominated above 1,500 m. The most important transitions were forest loss at lower elevations for pastures and crop‐ lands, forest gain in abandoned pastures and cropland in mid‐elevation areas, and shrub encroachment into highland grasslands. Expert validation confirmed the ob‐ served trends, but some areas of apparent forest gain were associated with new shade coffee, pine, or eucalypt plantations. In addition, after controlling for elevation and country, forest gain was associated with a decline in the rural population. Although we document an overall gain in forest cover, the recent reversal of forest gains in Colombia demonstrates that these coupled natural‐human systems are highly dy‐ namic and there is an urgent need of a regional real‐time land‐use, biodiversity, and ecosystem services monitoring network.",
author = "Aide, {T. Mitchell} and Grau, {H. Ricardo} and Jordan Graesser and Andrade-Nu{\~n}ez, {Maria Jose} and Ezequiel Ar{\'a}oz and Barros, {Ana P.} and Marconi Campos-Cerqueira and Eulogio Chacon-Moreno and Francisco Cuesta and Raul Espinoza and Manuel Peralvo and Polk, {Molly H.} and Ximena Rueda and Adriana Sanchez and Young, {Kenneth R.} and Luc{\'i}a Zarb{\'a} and Zimmerer, {Karl S.}",
year = "2019",
doi = "10.1111/gcb.14618",
language = "English (US)",
journal = "Global Change Biology",
issn = "1354-1013",
publisher = "Wiley-Blackwell",

}

Aide, TM, Grau, HR, Graesser, J, Andrade-Nuñez, MJ, Aráoz, E, Barros, AP, Campos-Cerqueira, M, Chacon-Moreno, E, Cuesta, F, Espinoza, R, Peralvo, M, Polk, MH, Rueda, X, Sanchez , A, Young, KR, Zarbá, L & Zimmerer, KS 2019, 'Woody vegetation dynamics in the tropical and subtropical Andes from 2001 to 2014: Satellite image interpretation and expert validation.', Global Change Biology. https://doi.org/10.1111/gcb.14618

Woody vegetation dynamics in the tropical and subtropical Andes from 2001 to 2014: Satellite image interpretation and expert validation. / Aide, T. Mitchell; Grau, H. Ricardo; Graesser, Jordan; Andrade-Nuñez, Maria Jose; Aráoz, Ezequiel; Barros, Ana P.; Campos-Cerqueira, Marconi; Chacon-Moreno, Eulogio; Cuesta, Francisco; Espinoza, Raul; Peralvo, Manuel; Polk, Molly H. ; Rueda, Ximena; Sanchez , Adriana; Young, Kenneth R.; Zarbá, Lucía; Zimmerer, Karl S.

En: Global Change Biology, 2019.

Resultado de la investigación: Contribución a RevistaArtículo

TY - JOUR

T1 - Woody vegetation dynamics in the tropical and subtropical Andes from 2001 to 2014: Satellite image interpretation and expert validation.

AU - Aide, T. Mitchell

AU - Grau, H. Ricardo

AU - Graesser, Jordan

AU - Andrade-Nuñez, Maria Jose

AU - Aráoz, Ezequiel

AU - Barros, Ana P.

AU - Campos-Cerqueira, Marconi

AU - Chacon-Moreno, Eulogio

AU - Cuesta, Francisco

AU - Espinoza, Raul

AU - Peralvo, Manuel

AU - Polk, Molly H.

AU - Rueda, Ximena

AU - Sanchez , Adriana

AU - Young, Kenneth R.

AU - Zarbá, Lucía

AU - Zimmerer, Karl S.

PY - 2019

Y1 - 2019

N2 - The interactions between climate and land‐use change are dictating the distribution of flora and fauna and reshuffling biotic community composition around the world. Tropical mountains are particularly sensitive because they often have a high human population density, a long history of agriculture, range‐restricted species, and high‐ beta diversity due to a steep elevation gradient. Here we evaluated the change in distribution of woody vegetation in the tropical Andes of South America for the pe‐ riod 2001–2014. For the analyses we created annual land‐cover/land‐use maps using MODIS satellite data at 250 m pixel resolution, calculated the cover of woody vege‐ tation (trees and shrubs) in 9,274 hexagons of 115.47 km2, and then determined if there was a statistically significant (p < 0.05) 14 year linear trend (positive—forest gain, negative—forest loss) within each hexagon. Of the 1,308 hexagons with signifi‐ cant trends, 36.6% (n = 479) lost forests and 63.4% (n = 829) gained forests. We esti‐ mated an overall net gain of ~500,000 ha in woody vegetation. Forest loss dominated the 1,000–1,499 m elevation zone and forest gain dominated above 1,500 m. The most important transitions were forest loss at lower elevations for pastures and crop‐ lands, forest gain in abandoned pastures and cropland in mid‐elevation areas, and shrub encroachment into highland grasslands. Expert validation confirmed the ob‐ served trends, but some areas of apparent forest gain were associated with new shade coffee, pine, or eucalypt plantations. In addition, after controlling for elevation and country, forest gain was associated with a decline in the rural population. Although we document an overall gain in forest cover, the recent reversal of forest gains in Colombia demonstrates that these coupled natural‐human systems are highly dy‐ namic and there is an urgent need of a regional real‐time land‐use, biodiversity, and ecosystem services monitoring network.

AB - The interactions between climate and land‐use change are dictating the distribution of flora and fauna and reshuffling biotic community composition around the world. Tropical mountains are particularly sensitive because they often have a high human population density, a long history of agriculture, range‐restricted species, and high‐ beta diversity due to a steep elevation gradient. Here we evaluated the change in distribution of woody vegetation in the tropical Andes of South America for the pe‐ riod 2001–2014. For the analyses we created annual land‐cover/land‐use maps using MODIS satellite data at 250 m pixel resolution, calculated the cover of woody vege‐ tation (trees and shrubs) in 9,274 hexagons of 115.47 km2, and then determined if there was a statistically significant (p < 0.05) 14 year linear trend (positive—forest gain, negative—forest loss) within each hexagon. Of the 1,308 hexagons with signifi‐ cant trends, 36.6% (n = 479) lost forests and 63.4% (n = 829) gained forests. We esti‐ mated an overall net gain of ~500,000 ha in woody vegetation. Forest loss dominated the 1,000–1,499 m elevation zone and forest gain dominated above 1,500 m. The most important transitions were forest loss at lower elevations for pastures and crop‐ lands, forest gain in abandoned pastures and cropland in mid‐elevation areas, and shrub encroachment into highland grasslands. Expert validation confirmed the ob‐ served trends, but some areas of apparent forest gain were associated with new shade coffee, pine, or eucalypt plantations. In addition, after controlling for elevation and country, forest gain was associated with a decline in the rural population. Although we document an overall gain in forest cover, the recent reversal of forest gains in Colombia demonstrates that these coupled natural‐human systems are highly dy‐ namic and there is an urgent need of a regional real‐time land‐use, biodiversity, and ecosystem services monitoring network.

U2 - 10.1111/gcb.14618

DO - 10.1111/gcb.14618

M3 - Article

JO - Global Change Biology

JF - Global Change Biology

SN - 1354-1013

ER -