Savanna dynamics under extreme conditions insights from a mathematical model
Dissertation, Universität Potsdam, Mathematisch-Naturwissenschaftliche Fakultät, 2017
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| Sprache: | eng |
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Potsdam
2016
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Tag hinzufügen | Zusammenfassung: | Dissertation, Universität Potsdam, Mathematisch-Naturwissenschaftliche Fakultät, 2017 Savannas cover a broad geographical range across continents and are a biome best described by a mix of herbaceous and woody plants. The former create a more or less continuous layer while the latter should be sparse enough to leave an open canopy. What has long intrigued ecologists is how these two competing plant life forms of vegetation coexist. Initially attributed to resource competition, coexistence was considered the stable outcome of a root niche differentiation between trees and grasses. The importance of environmental factors became evident later, when data from moister environments demonstrated that tree cover was often lower than what the rainfall conditions would allow for. Our current understanding relies on the interaction of competition and disturbances in space and time. Hence, the influence of grazing and fire and the corresponding feedbacks they generate have been keenly investigated. Grazing removes grass cover, initiating a self-reinforcing process propagating tree cover expansion. This is known as the… |
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| Beschreibung: | kumulative Dissertation |
| Beschreibung: | x, 168 Seiten Illustrationen, Diagramme |