A continental analysis of correlations between tree patterns in African savannas and human and environmental variables
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 ae...
| Autores principales: | , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2011
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/3516 |
| _version_ | 1855513158391693312 |
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| author | Groen, T.A. Langevelde, F. van Vijver, C.A.D.M. van de Raad, A.L. de Leeuw, Jan de Prins, H.H.T. |
| author_browse | Groen, T.A. Langevelde, F. van Leeuw, Jan de Prins, H.H.T. Raad, A.L. de Vijver, C.A.D.M. van de |
| author_facet | Groen, T.A. Langevelde, F. van Vijver, C.A.D.M. van de Raad, A.L. de Leeuw, Jan de Prins, H.H.T. |
| author_sort | Groen, T.A. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | 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. |
| format | Journal Article |
| id | CGSpace3516 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2011 |
| publishDateRange | 2011 |
| publishDateSort | 2011 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace35162025-06-13T04:20:10Z A continental analysis of correlations between tree patterns in African savannas and human and environmental variables Groen, T.A. Langevelde, F. van Vijver, C.A.D.M. van de Raad, A.L. de Leeuw, Jan de Prins, H.H.T. environment trees ecology 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. 2011-08 2011-04-25T09:26:47Z 2011-04-25T09:26:47Z Journal Article https://hdl.handle.net/10568/3516 en Limited Access Elsevier Groen, T.A., Langevelde, F. van, Vijver, C.A.D.M. van de, Raad, A.L. de , Leeuw, J. de and Prins, H.H.T. 2011. A continental analysis of correlations between tree patterns in African savannas and human and environmental variables. Journal of Arid Environments 75(8): 724-733. |
| spellingShingle | environment trees ecology Groen, T.A. Langevelde, F. van Vijver, C.A.D.M. van de Raad, A.L. de Leeuw, Jan de Prins, H.H.T. A continental analysis of correlations between tree patterns in African savannas and human and environmental variables |
| title | A continental analysis of correlations between tree patterns in African savannas and human and environmental variables |
| title_full | A continental analysis of correlations between tree patterns in African savannas and human and environmental variables |
| title_fullStr | A continental analysis of correlations between tree patterns in African savannas and human and environmental variables |
| title_full_unstemmed | A continental analysis of correlations between tree patterns in African savannas and human and environmental variables |
| title_short | A continental analysis of correlations between tree patterns in African savannas and human and environmental variables |
| title_sort | continental analysis of correlations between tree patterns in african savannas and human and environmental variables |
| topic | environment trees ecology |
| url | https://hdl.handle.net/10568/3516 |
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