Affiliations 

  • 1 Department of Plant Sciences, Forest Ecology and Conservation group, University of Cambridge, Cambridge, UK
  • 2 School of Biological Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen, UK
  • 3 Sabah Forestry Department, Forest Research Centre, P.O. Box 1407, 90715, Sandakan, Sabah, Malaysia
  • 4 Department of Sustainable Agro-ecosystems and Bioresources, Research and Innovation Centre, Fondazione E. Mach, Via E. Mach 1, 38010, San Michele all'Adige, Italy
  • 5 School of Geography, University of Leeds, Leeds, LS2 9JT, UK
Ecol. Lett., 2018 07;21(7):989-1000.
PMID: 29659115 DOI: 10.1111/ele.12964

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.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.