Topography is a key driver of tropical forest structure and composition, as it constrains local nutrient and hydraulic conditions within which trees grow. Yet, we do not fully understand how changes in forest physiognomy driven by topography impact other emergent properties of forests, such as their aboveground carbon density (ACD). Working in Borneo – at a site where 70-m-tall forests in alluvial valleys rapidly transition to stunted heath forests on nutrient-depleted dip slopes – we combined field data with airborne laser scanning and hyperspectral imaging to characterise how topography shapes the vertical structure, wood density, diversity and ACD of nearly 15 km2 of old-growth forest. We found that subtle differences in elevation – which control soil chemistry and hydrology – profoundly influenced the structure, composition and diversity of the canopy. Capturing these processes was critical to explaining landscape-scale heterogeneity in ACD, highlighting how emerging remote sensing technologies can provide new insights into long-standing ecological questions

Jucker, T.; Bongalov, B.; Burslem, D.; Nilus, R.; Dalponte, M.; Lewis, S.; Phillips, O.; Qie, L.; Coomes, D.A. (2018). Topography shapes the structure, composition and function of tropical forest landscapes. ECOLOGY LETTERS, 21 (7): 989-1000. doi: 10.1111/ele.12964 handle: http://hdl.handle.net/10449/47196

Topography shapes the structure, composition and function of tropical forest landscapes

Dalponte, M.;
2018-01-01

Abstract

Topography is a key driver of tropical forest structure and composition, as it constrains local nutrient and hydraulic conditions within which trees grow. Yet, we do not fully understand how changes in forest physiognomy driven by topography impact other emergent properties of forests, such as their aboveground carbon density (ACD). Working in Borneo – at a site where 70-m-tall forests in alluvial valleys rapidly transition to stunted heath forests on nutrient-depleted dip slopes – we combined field data with airborne laser scanning and hyperspectral imaging to characterise how topography shapes the vertical structure, wood density, diversity and ACD of nearly 15 km2 of old-growth forest. We found that subtle differences in elevation – which control soil chemistry and hydrology – profoundly influenced the structure, composition and diversity of the canopy. Capturing these processes was critical to explaining landscape-scale heterogeneity in ACD, highlighting how emerging remote sensing technologies can provide new insights into long-standing ecological questions
Aboveground carbon density
Airborne laser scanning (or LiDAR)
Biodiversity
Canopy height
Gap fraction
Hyperspectral imaging
Remote sensing
Terrain elevation
Slope and curvature
Wood density
Settore BIO/07 - ECOLOGIA
2018
Jucker, T.; Bongalov, B.; Burslem, D.; Nilus, R.; Dalponte, M.; Lewis, S.; Phillips, O.; Qie, L.; Coomes, D.A. (2018). Topography shapes the structure, composition and function of tropical forest landscapes. ECOLOGY LETTERS, 21 (7): 989-1000. doi: 10.1111/ele.12964 handle: http://hdl.handle.net/10449/47196
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/47196
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