Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 406317
Title A continental analysis of correlations between tree patterns in African savannas and human and environmental variables
Author(s) Groen, T.A.; Langevelde, F. van; Vijver, C.A.D.M. van de; Raad, A.L. de; Leeuw, J. de; Prins, H.H.T.
Source Journal of Arid Environments 75 (2011)8. - ISSN 0140-1963 - p. 724 - 733.
DOI http://dx.doi.org/10.1016/j.jaridenv.2011.03.010
Department(s) Resource Ecology
WU Plant SciencesDepartment of Plant Sciences
PE&RC
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) southern-africa - semiarid savannas - density patterns - fire frequency - woody cover - coexistence - vegetation - stability - ecosystems - woodlands
Abstract This study analyses possible relationships between natural processes taking place in savannas and the tree patterns found in savannas. This can lead to new hypotheses about which processes are driving savanna physiognomy. To do so tree patterns were quantified for African savannas from historical aerial photographs applying frequently used landscape metrics. Also, additional data for these areas were collected to quantify the processes taking place at these locations. Correlations between tree pattern indices and explaining factors were analysed. We found a negative trend between tree cover and density of sheep and goats, but no relationship between tree cover and density of cattle, suggesting that small livestock have an effect on tree cover, but that larger livestock (or obligate grazers) do not. Also, a positive correlation between human population density and tree cover was found. Possible explanations for the found relations are discussed. Subsequent ways to analyse the latter correlation are discussed, and the potential of the presented historical database of aerial photographs is highlighted
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