Influence of increasing dryness, animal feeding strategy and human hunting on large ungulates abundance: A first approach in West Africa

Influence of increasing dryness, animal feeding strategy and human hunting on large ungulates... Large ungulates as primary consumers consume variable proportions of herbaceous and woody plants. Recent climate changes modify the herbaceous/woody plant balance. To test their differential effects on ungulate species abundance, we compared large ungulate feeding strategies with climate change patterns, taking the game preferences of local people into account. We analyzed changes in population density of ten species of large ungulates between two census periods (1990–1993 and 1994–1998) in the Niokolo Koba National Park, Senegal. We calculated the cumulative precipitation deficit during the 1989–1997 period. Additionally, we conducted an extensive survey of local people’s game preferences. Results are: 1—in the period 1989–98 all but one year have been drier than the 1940–98 average; 2—this has a cumulative effect on the dryness of the land i.e. produces a water deficit; 3—this pattern favors the growth of woody plants over herbaceous ones; 4—this favors browsers over grazers; 5—grazers are generally preferred by hunters; 6—grazers are therefore disadvantaged both by the drier climate and by preferential hunting; 7—management in the National Park should focus on holding back bush encroachment and encouraging the growth of herbaceous plants. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Ecology Springer Journals

Influence of increasing dryness, animal feeding strategy and human hunting on large ungulates abundance: A first approach in West Africa

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Publisher
Springer Journals
Copyright
Copyright © 2015 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Ecology; Environment, general
ISSN
1067-4136
eISSN
1608-3334
D.O.I.
10.1134/S106741361501004X
Publisher site
See Article on Publisher Site

Abstract

Large ungulates as primary consumers consume variable proportions of herbaceous and woody plants. Recent climate changes modify the herbaceous/woody plant balance. To test their differential effects on ungulate species abundance, we compared large ungulate feeding strategies with climate change patterns, taking the game preferences of local people into account. We analyzed changes in population density of ten species of large ungulates between two census periods (1990–1993 and 1994–1998) in the Niokolo Koba National Park, Senegal. We calculated the cumulative precipitation deficit during the 1989–1997 period. Additionally, we conducted an extensive survey of local people’s game preferences. Results are: 1—in the period 1989–98 all but one year have been drier than the 1940–98 average; 2—this has a cumulative effect on the dryness of the land i.e. produces a water deficit; 3—this pattern favors the growth of woody plants over herbaceous ones; 4—this favors browsers over grazers; 5—grazers are generally preferred by hunters; 6—grazers are therefore disadvantaged both by the drier climate and by preferential hunting; 7—management in the National Park should focus on holding back bush encroachment and encouraging the growth of herbaceous plants.

Journal

Russian Journal of EcologySpringer Journals

Published: Jan 22, 2015

References

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