Patterns of Tree Distribution within Small Communities of the Sudanian Savanna-Sahel
2. Materials and Methods
|Crown Diameter (m)||6056||1.0||32.3||6.6||3.1|
|No. of trees per plot 1||2181||1||18||2.52||2.47|
|Distance from Center (m)||6056||50||3600||466||396|
|Annual Rainfall (mm)||52||400||1240||749||251|
|Land Use Zone|
|Number of Trees per Plot||3.16 (2.49)||2.61 (2.49)||1.52 (2.09)|
|Crown Diameter (m)||6.75 (3.24)||5.87 (3.49)||4.46 (3.79)|
- Tree planting and management are actively pursued in communities. As one moves from older to younger parts of a community the trees are smaller and tree density declines. Beyond the perimeter of the community one finds only agricultural land with few or no trees. Only in Ati, Chad did we find a substantial forested area on the northwestern edge of the urban area. Ati did expand into this area.
- Crown diameter increases with decreasing rainfall. This correlation is the reverse of crown diameter-rainfall relationship in forests of the region . We believe considerable attention must be paid to the planting or care of trees within communities for the patterns of crown size and tree density relative to rainfall patterns to exist as they do in our study area.
- Older, more centrally located areas in the community have more trees per unit area, and those trees have larger crown diameters (density and crown diameters decrease with increased distance from the center of the community). This pattern would be consistent with the long-term historical management of trees. Older parts of a community have been established for longer periods of time and those near the edge have recently been converted from nearly treeless farm fields. The older parts of a community would have more and larger trees. Similar patterns of tree characteristics are true for urban areas in the United States [27,28,29].
Conflicts of Interest
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Sterling, S.J.; Orr, B. Patterns of Tree Distribution within Small Communities of the Sudanian Savanna-Sahel. Land 2014, 3, 1284-1292. https://doi.org/10.3390/land3041284
Sterling SJ, Orr B. Patterns of Tree Distribution within Small Communities of the Sudanian Savanna-Sahel. Land. 2014; 3(4):1284-1292. https://doi.org/10.3390/land3041284Chicago/Turabian Style
Sterling, Sarah J., and Blair Orr. 2014. "Patterns of Tree Distribution within Small Communities of the Sudanian Savanna-Sahel" Land 3, no. 4: 1284-1292. https://doi.org/10.3390/land3041284