CRC 990 - EFForTS - Georg-August-Universität Göttingen

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CRC 990 Ecological and Socioeconomic Functions of Tropical Lowland Rainforest Transformation Systems (Sumatra, Indonesia) Issue 1 / August 2013 page 14 von 32 B11 II. Integration of Ecological and Socioeconomic Research Integration / integrative research activities across disciplines in the CRC is realized through - the establishment of a joint enrichment planting experiment (B11) - four thematic foci / overarching joint hypotheses. Title: Biodiversity enrichment in oil palm plantations: ecological and socio-economic impacts Team: Holger Kreft, Ulrich Brose, Dirk Hoelscher, Yann Clough, Meike Wollni (UGoe), Hendrayanto, Leti Sundawati, Prijanto Pamoengkas (IPB), Bambang Irawan, Rosyani (UNJA), Aiyen (UNTAD), Miriam Teuscher, Anne Gérard (PhD students) Aims: Increasing the biodiversity within an oil palm plantation by planting trees inside gaps. The objective of the experiment is to find out how enrichment planting with different diversity levels of one, two, three and six tree species affects ecosystem functioning, plant and animal diversity and the productivity of oil palms. The main questions to be addressed are: Can biodiversity and associated ecosystem services - (biological pest control, enhanced pollination) be restored by enrichment planting? - Under which planting strategies do enhanced ecosystem services positively affect oil palm economics? Current status: Figure 1. Location of the experimental plots on the plantation of Humusindo (black dots). The total size of the experimental area (shaded) is ca. 140 ha. In October this year, plots of varying sizes will be established on an oil palm plantation (500 ha) owned by PT Humusindo, a company which is located near Bungku in the Batanghari region (Fig. 1). The plots will be systematically distributed within an oil palm plantation; diversity levels and the four different plot sizes will be randomly distributed (Fig 2). Figure 2. Experimental design at PT Humusindo A second B11 experiment, varying forest distances and plot sizes, is planned at another location close to Jangga Baru, a village in the Batanghari region. The proposed plantation is intensively managed, ca. 4000 ha big and of medium age. Adjacent to the northern border of the plantation there is a small protected forest. Preliminary study by Miriam Vorlaufer (C08) and Miriam Teuscher (B11): Title: How much is a bird? Bird diversity in smallholder oil palm plantations As a preliminary study of the B11 project we investigate the effect of enrichment plantings in smallholder oil palm plantations on bird diversity by combining economic with ecological data. www.uni-goettingen.de/de/310995.html • crc990@gwdg.de • Telephone: +49 551 39-1 21 18 JFB Institute for Zoology & Anthropology • Berliner Strasse 28 • D-37073 Göttingen
CRC 990 Ecological and Socioeconomic Functions of Tropical Lowland Rainforest Transformation Systems (Sumatra, Indonesia) Issue 1 / August 2013 page 15 von 32 - Is there enrichment planting in smallholder oil palm plantations? - How is bird diversity affected by enrichment plantings? - Is oil palm profitability influenced by enrichment planting? - How much is a bird? Current status: For our sampling (from February until April 2013), we chose two autochthon and two transmigrant villages in the Batanghari region and randomly selected 120 oil palm farmers within these four villages. By using a standardized questionnaire, plot specific data, such as plot characteristics, costs and benefits of oil palm cultivation, abundance and use of tree species in oil palm plantations as well as perceived costs and benefits of enrichment planting, were collected. Furthermore, farmers were asked about their willingness to accept compensation for planting trees in their oil palm plantation. Subsequent to the farmer survey, bird diversity and vegetation structure was assessed on each plot. Based on these ecological and socio-economic data, the effectiveness of enrichment plantings will be evaluated. This study may thus contribute to the development of ecologically improved and socio-economically viable management concepts in oil palm landscapes. Foci Focus 1 Title: Assessment of ecological and socioeconomic functions across tropical transformation systems Representatives: Yann Clough, Oliver Mußhoff & Edzo Veldkamp What are the synergies and trade-offs between ecological and socio-economic functions across different landuse systems in Indonesia (Sumatra)? This question is at the core of the focus area “Assessment of ecological and socio-economic functions across tropical transformation systems”. This focus provides a conceptual umbrella which brings together scientists from different disciplines to facilitate joint analyses of the various dimensions of human welfare (profit, income, employment, income distribution, risk, poverty, food security, culture, gender) and coreplot level measures of biodiversity & ecosystem functioning . In Focus 1 we aim at an integration of the different data sources for multiple ecological and socio-economic indicators into common models. One of the challenges in such an interdisciplinary enterprise is that assumptions and methods differ across all investigators and scientific disciplines to some degree, with divides likely to be obvious between ecology and social and economic sciences. At focus was the question “Which divides need to be bridged (if any?) in order to bring together the various dimensions of human welfare and core-plot level measures of biodiversity and ecosystem functioning”? In order to progress towards higher levels of integration it emerged that the issues of disparity between sites sampled and the different scales at which data are recorded are those that will need concerted action and specific modeling solutions. Data from different areas can be brought together by: - using the overlap (i.e., common information available from household data and core plot owner data, overlap of individual ABC datasets from beyond the core plots) - by subsetting the C data to fit the core plot/core plot owner data - in agent-based models, by relating an agent to the plot - using geographic proximity to the core plot (and possibly other similarity information) to correlate core plot data with data from C groups. The difference in usage of vocabulary in assumptions and philosophical foundations were not seen as a major obstacle. A multiplicity of approaches with contrasting foundations is a plus rather than a problem. Disciplinary language barriers should be recognized and breached to enhance interdisciplinary communication. www.uni-goettingen.de/de/310995.html • crc990@gwdg.de • Telephone: +49 551 39-1 21 18 JFB Institute for Zoology & Anthropology • Berliner Strasse 28 • D-37073 Göttingen
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CRC 990 - EFForTS - Georg-August-Universität Göttingen

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