Dr. Harald Asmus Dr. Bernhard Andreas Mayer

158 Sekretariat Perizinan Penelitian Asing Kementerian Riset dan Teknologi DIREKTORI PENELITIAN ASING DI INDONESIA 2013

97.1 Dr. Harald Asmus

Warga Negara : Jerman Jabatan : Project Leader Institusi : Leibnitz Centre for Marine Tropical Ecology ZMT No. SIP : 041SIPFRPSMII2013

97.2 Dr. Bernhard Andreas Mayer

Warga Negara : Jerman Jabatan : Researcher Institusi : University of Hamburg No. SIP : 042SIPFRPSMII2013 98. Carbon Sequestration, Litter C Input to the Soil and Resource Use Eiciency in the Lowland Rainforest Transformation Systems on Sumatra Tujuan Penelitian : Mengkaji perubahan peredaran karbon sebagai dampak perubahan penggunaan lahan Bidang Penelitian : Ekologi Daerah Penelitian : Jambi TN Bukit Dua Belas dan Hutan Harapan Lama Penelitian : 12 dua belas bulan mulai 16 Juni 2013 Mitra Kerja : IPB Prof. Cecep Kusmana dan Universitas Jambi Drs. Damris Muhammad, M.Sc., Ph.D Abstract Rainforest transformation has been suggested to largely inluence the carbon cycle of the respective ecosystems. However, changes in carbon sequestration and ecosystem net primary productivity may also be inluenced by the resource water or nutrient use-eiciency in the respective forest system. This project will investigating changes in carbon sequestration and net primary production above- and belowground, and litter carbon luxes to the soil carbon stock with forest 159 Sekretariat Perizinan Penelitian Asing Kementerian Riset dan Teknologi DIREKTORI PENELITIAN ASING DI INDONESIA 2013 transformation of tropical lowland forest into jungle rubber forest, and intensively managed rubber and oil palm plantations in Sumatra Indonesia. The project links altered patterns in tree species diversity and identity in the presence of tree functional types, and forest structure to ecosystem functioning with a focus on the carbon cycle and the resource use-eiciency in net primary production of the forests. The results will help to assess the consequences of large-scale conversion of natural tropical lowland rainforest into forest transformation systems for carbon sequestration and ecosystem functioning for larger landscape areas. In each of the 32 study plots 50 m x 50 m an inventory of aboveground woody biomass and carbon stocks will be carried out. Annual aboveground litter fall will be determined by the installation of 24 litter traps and analysis of litter samples for C and N contents. Belowground litter production will be estimated with an ingrowth core approach 24 ingrowth cores in all 32 plots. To validate the ingrowth core data, we will apply the minirhizotron technique for analysing ine root longevity from direct observations 16 rhizotron tubes in 4 plots, in order to gain quantitative data on seasonal changes in living and dead ine root mass arid related C and N contents, we will conduct a sequential soil coring approach 20 sampling locations at 4 plots. Annual above-ground tree biomass production will be estimated based on the investigation of major components of above-ground net primary production: stem diameter growth natural rainforest and rubber systems, height growth of oil palm individuals, litter production and oil palm fruit yield. For the inventory of live and dead ine root mass soil samples from the upper soil will be analysed from 10 randomly selected sampling locations in 3 soil depths with varying distance to surrounding stems in each of the 32 core sites.

98.1 Ms. Martyna Malgorzata Kotowska