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Tree effects on grass growth in savannas: competition, facilitation and the stress‐gradient hypothesis
Summary The stress-gradient hypothesis (SGH) predicts an increasing importance of facilitative mechanisms relative to competition along gradients of increasing environmental stress. AlthoughExpand
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Facilitation or Competition? Tree Effects on Grass Biomass across a Precipitation Gradient
Savanna ecosystems are dominated by two distinct plant life forms, grasses and trees, but the interactions between them are poorly understood. Here, we quantified the effects of isolated savannaExpand
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The rhythm of savanna patch dynamics
1. Patch dynamics is a new, potentially unifying mechanism for the explanation of tree-grass coexistence in savannas. In this scale-explicit paradigm, savannas consist of patches in which a cyclicalExpand
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SATCHMO : A spatial simulation model of growth, competition, and mortality in cycling savanna patches
Many mechanisms have been suggested to explain the coexistence of woody species and grasses in savannas, yet, evidence from field studies and simulation models has been mixed. Shrub encroachment isExpand
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Big is not better: small Acacia mellifera shrubs are more vital after fire
Fire and acacias are vital components in savanna dynamics but little is known about the relationship between postfire mortality and size of Acacia species. We determined mortality, height, and heightExpand
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Predictive systems ecology
  • M. Evans, M. Bithell, +17 authors T. Benton
  • Environmental Science, Medicine
  • Proceedings of the Royal Society B: Biological…
  • 22 November 2013
Human societies, and their well-being, depend to a significant extent on the state of the ecosystems that surround them. These ecosystems are changing rapidly usually in response to anthropogenicExpand
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Composition and Antioxidant Activity of Olive Leaf Extracts from Greek Olive Cultivars
The olive leaf phenolic composition of the Greek cultivars koroneiki, megaritiki and kalamon was determined using LC/MS. Furthermore, the antioxidant activity of olive leaf extracts from the aboveExpand
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Multi-proxy evidence for competition between savanna woody species
Abstract Coexistence of trees and grasses in savannas should be possible if competition between the woody and the grassy components is less intense than the competition within each component.Expand
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Modified niche optima and breadths explain the historical contingency of bacterial community responses to eutrophication in coastal sediments.
Previous studies have shown that the response of bacterial communities to disturbances depends on their environmental history. Historically fluctuating habitats host communities that respond betterExpand
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Spacing patterns of an Acacia tree in the Kalahari over a 61-year period: How clumped becomes regular and vice versa
Nearest tree neighbour distances and the tree spatial formation on a large scale over time and space replicates were examined. The study was conducted in a natural savanna ecosystem in the SouthernExpand
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