Julian Schrader

Schrader, Julian

My PhD-project

The positive relationship between species numbers and area of islands is one of the few genuine laws in ecology. However, the shape of species-area relationships is often highly variable, especially for small islands for which this anomaly is known as the small island effect. In my PhD-project, I will focus on the mechanisms underlying the small island effect which are still poorly understood. Therefore, I compare functional traits and taxonomic diversity of woody plant species on islands with varying island sizes and levels of isolation in West Papua, Indonesia. These islands comprise pristine vegetation, have a similar morphology, and occur in various sizes and distances to the mainland. These characteristics make them an ideal model system to study fundamental and globally important questions about the diversity, resilience, and stability of small, fragmented and isolated islands and habitats.

Academic education

2016 to present: PhD program "Biological Diversity and Ecology", Georg-August University Göttingen, Germany
2012 to 2014: M.Sc. in Biodiversity, Ecology and Evolution,
2009 to 2012: B.Sc. in Biology of Organisms, University of Osnabrück, Germany


Since 2016: PhD-Scholarship - Studienstiftung des deutschen Volkes
2014: Deutsche Gesellschaft für Internationale Zusammenarbeit
2014: PROMOS - German Academic Exchange Service (DAAD)


Shi, P., Liu, M., Ratkowsky, D. A., Gielis, J., Su, J., Yu, X., Wang, P., Zhang, L., Lin, Z. & Schrader, J. (2019): Leaf area–length allometry and its implications in leaf shape evolution. Trees. doi: 10.1007/s00468-019-01843-4 pdf

Schrader, J., König, C., Moeljono, S., Pärtel, M. & Kreft, H. (2019): Requirements of plant species are linked to area and determine species pool and richness on small islands. Journal of Vegetation Science. doi: 10.1111/jvs.12758 pdf

König, C., Weigelt, P., Schrader, J., Taylor, A, Kattge, J. & Kreft, H.(2019): Biodiversity data integration – The significance of data resolution and domain. PLOS Biology 17, e3000183. pdf

Schrader, J., Moeljono, S., Keppel, G. & Kreft, H. (2019): Plants on small islands revisited: the effects of spatial scale and habitat quality on the species-area relationship. Ecography. doi: 10.1111/ecog.04512 pdf

Fried, O., Kühn, I., Schrader, J., Sinh Nguyen, V. & Bergmeier, E. (2018): Plant diversity and composition of rice field bunds in Southeast Asia. Paddy and Water Environment. doi: 10.1007/s10333-018-0657-8 pdf

Settele, J., Heong, K.L., Kühn, I., Klotz, S., Spangenberg, J.H., Arida, G., Beaurepaire, A., Beck, S., Bergmeier, E., Burkhard, B., Brandl, R., Bustamante, J.V., Butler, A., Cabbigat, J., Le, X.C., Catindig, J.L.A., Ho, V.C., Le, Q.C., Dang, K.B., Escalada, M., Dominik, C., Franzén, M., Fried, O., Görg, C., Grescho, V., Grossmann, S., Gurr, G.M., Hadi, B.A.R., Le, H.H., Harpke, A., Hass, A.L., Hirneisen, N., Horgan, F.G., Hotes, S., Isoda, Y., Jahn, R., Kettle, H., Klotzbücher, A., Klotzbücher, T., Langerwisch, F., Loke, W.-H., Lin, Y.-P., Lu, Z., Lum, K.-Y., Magcale-Macandog, D.B., Marion, G., Marquez, L., Müller, F., Nguyen, H.M., Nguyen, Q.A., Nguyen, V.S., Ott, J., Penev, L., Pham, H.T., Radermacher, N., Rodriguez-Labajos, B., Sann, C., Sattler, C., Schädler, M., Scheu, S., Schmidt, A., Schrader, J., Schweiger, O., Seppelt, R., Soitong, K., Stoev, P., Stoll-Kleemann, S., Tekken, V., Thonicke, K., Tilliger, B., Tobias, K., Andi Trisyono, Y., Dao, T.T., Tscharntke, T., Le, Q.T., Türke, M., Václavík, T., Vetterlein, D., Villareal, S.B., Vu, K.C., Vu, Q., Weisser, W.W., Westphal, C., Zhu, Z. & Wiemers, M. (2018): Rice ecosystem services in South-east Asia. Paddy and Water Environment. doi: 10.1007/s10333-018-0656-9 pdf

Sattler, C., Schrader, J., Farkas, V.M., Settele, J. & Franzén, M. (2018): Pesticide diversity in rice growing areas of Northern Vietnam. Paddy and Water Environment. doi: 10.1007/s10333-018-0637-z pdf

Schrader, J., Pillar, G. & Kreft, H. (2017): Leaf-IT: An Android application for measuring leaf area. Ecology and Evolution. doi: 10.1002/ece3.3485 pdf, download Leaf-IT

Schrader, J., Franzén, M., Sattler, C., Ferderer, P. & Westphal, C. (2017): Woody habitats promote pollinators and complexity of plant–pollinator interactions in homegardens located in rice terraces of the Philippine Cordilleras. Paddy and Water Environment. doi: 10.1007/s10333-017-0612-0 pdf

Franzén, M., Schrader, J. & Sjöberg, G. (2017): Butterfly diversity and seasonality of Ta Phin mountain area (N. Vietnam, Lao Cai province). Journal of Insect Conservation 21, 465-475. pdf

Fried, O., Kühn, I., Schrader, J., Sinh, N. Van & Bergmeier, E. (2017): Plant diversity and community composition of rice agroecosystems in Vietnam and the Philippines. Phytocoenologia 47, 49-66. pdf

Schrader, J., Unsicker, S.B., Bhattacharya, S. & Mummenhoff, K. (2017): Growth form rather than phylogenetic relationship predicts broad volatile emission patterns in the Brassicaceae. Plant Systematics and Evolution 303, 653-662. pdf