IDESSA Publications

In progress

Hesselbarth, M., Wiegand, K., Kellner, K., Tsvuura, Z., Dreber, N., Esser, D. (in progress): Spatial patterns of woody plants in relation to woody plant density: A comparative assessment in semi-arid and mesic savannas, South Africa.

Higginbottom, T., Symeonakis, E., Meyer, H. (in progress): Predictive modelling of fractional woody cover in semi-arid savannahs using multi-sensor and multi seasonal data.

Meyer, H., Drönner, J., Nauss, T. (in review): Satellite based high resolution mapping of rainfall over Southern Africa. Atmos. Meas. Tech. Discuss doi:10.5194/amt-2017-33

Peer-reviewed publications

2017

Meyer, H., Kühnlein, M., Reudenbach, C., Nauss, T. (2017): Revealing the potential of spectral and texture predictor variables in a neural network based rainfall retrieval technique. Remote Sensing Letters 8: 647-656

Dreber, N., van Rooyen, S.E., Kellner, K. (2017): Relationship of plant diversity and bush cover in rangelands of a semi-arid Kalahari savanna, South Africa. African Journal of Ecology, DOI: 10.1111/aje.12425

Beilschmidt, C., Drönner, J., Mattig, M., Schmidt, M., Authmann, C., Niamir, A., Hickler, T., Seeger, B. (2017): Interactive Data Exploration for Geoscience. BTW Workshops 2017

2016

Accatino, F., Ward, D., Wiegand, K., De Michele, C. (2016): Carrying capacity in arid rangelands during droughts: the role of temporal and spatial thresholds. Animal, DOI: 10.1017/S1751731116001531

Harmse, C.J., Kellner, K., Dreber, N. (2016): Restoring productive rangelands: A comparative assessment of selective and non-selective chemical bush control in a semi-arid Kalahari savanna. Journal of Arid Environments 135: 39-49.

Mureva, A., Ward, D. (2016): Spatial patterns of encroaching shrub species under different grazing regimes in a semi-arid savanna, eastern Karoo, South Africa. African Journal of Range and Forage Science, DOI : 10.2989/10220119.2016.1148775

Ludwig, A., Meyer, H., Nauss, T. (2016): Automatic classification of Google Earth images for a larger scale monitoring of bush encroachment in South Africa. International Journal of Applied Earth Observation and Geoinformation 50: 89-94

Accatino, F., Wiegand, K., Ward, D., De Michele, C. (2016): Trees, grass, and fire in humid savannas - The importance of life history traits and spatial processes. Ecological Modelling 320: 135-144.

Meyer, H., Kühnlein, M., Appelhans, T., Nauss, T. (2016): Comparison of four machine learning algorithms for their applicability in satellite-based optical rainfall retrievals. Atmospheric Research 169: 424-433.

2015

Authmann, C., Beilschmidt, C., Drönner, J., Mattig, M., Seeger, B. (2015): VAT: a system for visualizing, analyzing and transforming spatial data in science. Datenbank-Spektrum, 15(3), 175-184.

Authmann, C., Beilschmidt, C., Drönner, J., Mattig, M., Seeger, B. (2015): Rethinking Spatial Processing in Data-Intensive Science. BTW Workshops 2015: 161-170

Conference contributions

2017

Meyer, H., Authmann, C., Dreber, N., Hess, B., Kellner, K., Morgenthal, T., Nauss, T., Seeger, B., Tsvuura, Z., Wiegand, K. (2017): IDESSA: An Integrative Decision Support System for Sustainable Rangeland Management in Southern African Savannas. Geophysical Research Abstracts 19: EGU2017-8802

2016

Kellner, K., Harmse, C.J., Fouche, J.H., Pelser, J.J. (2016): Restoration of degraded arid and semi-arid savannas in South Africa. SER 2016 - Best practice in restoration, 10th European Conference on Ecological Restoration, Freising, Germany, 22.-26.08.2016.

Ludwig A, Meyer H, Higginbottom T, Nauss T (2016): Classifying Google Earth images as training sites for application to a larger scale monitoring of bush encroachment in South Africa. European Geosciences Union General Assembly, Vienna, Austria, 17.-22.04.2016.

Morgenthal, T., Meyer, H., Kellner, K., Nauss, T. (2016): A Sentinel based analysis of vegetation patterns of a semi-arid savanna in South Africa. GFÖ 2016 - 150 years of Ecology - lessons for the future, 46th annual meeting of the Ecological Society of Germany, Austria and Switzerland, Marburg, Germany, 05.-09.09.2016.

2015

Meyer, H., Kühnlein, M., Appelhans, T., Nauß, T. (2015): Comparison of machine learning algorithms for their applicability in satellite-based optical rainfall retrievals. Atmospheric research. Geophysical Research Abstracts 17: EGU2015-3321-1.

Authmann, C., Beilschmidt, C., Drönner, J., Mattig, M., Seeger, B. (2015): Explorative Workflows for Data‐Driven Geo‐Science GFÖ 2015 - Ecology for a sustainable future, 45th annual conference of the Ecological Society of Germany, Austria and Switzerland, Göttingen, Germany, 31.08.-04.09.2015.

Hess, B., Hanss, S., Wiegand, K., Kellner, K., Morgenthal, T., van Rooyen, A.F., Jordaan F. (2015): Predicting savanna dynamics in response to management and climate change: a modelling approach for decision support. GFÖ 2015 - Ecology for a sustainable future, 45th annual conference of the Ecological Society of Germany, Austria and Switzerland, Göttingen, Germany, 31.08.-04.09.2015.

Van Rooyen, S., Kellner, K., Dreber, N. (2015): Short-term structural responses of woody savanna vegetation to non-selective chemical bush control, South Africa. GFÖ 2015 - Ecology for a sustainable future, 45th annual conference of the Ecological Society of Germany, Austria and Switzerland, Göttingen, Germany, 31.08.-04.09.2015.

2014

Authmann, C., Beilschmidt, C., Drönner, J., Mattig, M., Seeger, B. (2014): Analytical Workflows for Large Data. TDWG 2014 Symposium: Biodiversity Informatics workflows and services.

Theses

2016

Hesselbarth, M. (2016): Spatial patterning of key woody species in relation to bush density: A comparative assessment in semi-arid and mesic savannas, South Africa. MSc thesis, Georg-August-University Göttingen.

Reitz, O. (2016): Interpolation monatlicher Niederschläge in zwei südafrikanischen Regionen: Vergleich von Random Forest und Kriging. BSc thesis, Philipps-University Marburg.

Yihui, L. (2016): Modelling piosphere gradients across South African farms with Netlogo. BSc thesis, Georg-August-University Göttingen.

Körber, M. (2016): Caching von Geodaten. MSc thesis, Philipps-University Marburg.

2015

Ludwig, A. (2015): Identification of bush encroachment in South African Savannas: A machine learning based approach using Random Forests and MODIS imagery. BSc thesis, Philipps-University Marburg.

Polakowski, F. (2015): Remote-sensing based predictions of bush encroachment in South Africa using Random Forests. BSc thesis, Philipps-University Marburg.

van Rooyen, S. (2015): Comparison of plant diversity of shrub thickened and chemically controlled savannas in the Molopo district, North-West Province, South Africa. BSc Honours thesis, North-West University.