Experimental biodiversity enrichment in oil-palm-dominated landscapes in Indonesia

Research output: Contribution to journalArticle

Abstract

Tropical biodiversity is threatened by the expansion of oil-palm plantations. Reduced-impact farming systems such as agroforests, have been proposed to increase biodiversity and ecosystem functioning. In regions where oil-palm plantations already dominate the landscape, this increase can only be achieved through systematic ecological restoration. However, our knowledge about the underlying ecological and socio-economic processes, constraints, and trade-offs of ecological restoration in oilpalm landscapes is very limited. To bridge this gap, we established a long-term biodiversity enrichment experiment. We established experimental tree islands in a conventional oil-palm plantation and systematically varied plot size, tree diversity, and tree species composition. Here, we describe the rationale and the design of the experiment, the ecosystem variables (soil, topography, canopy openness) and biotic characteristics (associated vegetation, invertebrates, birds) of the experimental site prior to the establishment of the experiment, and initial experimental effects on the fauna. Already one year after establishment of the experiment, tree plantings had an overall positive effect on the bird and invertebrate communities at the plantation scale. The diversity and abundance of invertebrates was positively affected by the size of the tree islands. Based on these results, we expect a further increase of biodiversity and associated ecological functions in the future. The long-term interdisciplinary monitoring of ecosystem variables, flora, fauna, and socio-economic aspects will allow us to evaluate the suitability of tree islands as a restoration measure. Thereof, guidelines for ecologically improved and socio-economically viable restoration and management concepts could be developed.

Details

Authors
  • Miriam Teuscher
  • Anne Gérard
  • Ulrich Brose
  • Damayanti Buchori
  • Yann Clough
  • Martin Ehbrecht
  • Dirk Hölscher
  • Bambang Irawan
  • Leti Sundawati
  • Meike Wollni
  • Holger Kreft
Organisations
External organisations
  • University of Göttingen
  • Friedrich Schiller University Jena
  • Bogor Agricultural University
  • Jambi University
  • German Centre for Integrative Biodiversity Research (iDiv)
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Environmental Sciences related to Agriculture and Land-use
  • Ecology

Keywords

  • Agroforestry, Applied nucleation, Biodiversity-ecosystem functioning, Ecological restoration, Ecosystem services, Tree planting
Original languageEnglish
Article number1538
JournalFrontiers in Plant Science
Volume7
Issue numberOCTOBER2016
Publication statusPublished - 2016 Oct 17
Publication categoryResearch
Peer-reviewedYes