Differential phenolic profiles in six African savanna woody species in relation to antiherbivore defense

2011 ◽  
Vol 72 (14-15) ◽  
pp. 1796-1803 ◽  
Author(s):  
Dawood Hattas ◽  
Joakim Hjältén ◽  
Riitta Julkunen-Tiitto ◽  
Peter F. Scogings ◽  
Tuulikki Rooke
Keyword(s):  
Woody Species ◽  
African Savanna ◽  
Phenolic Profiles ◽  
Antiherbivore Defense

Effects of Severe Defoliation on the Long-Term Resistance to Insect Attack and on Leaf Chemistry in Six Woody Species of the Southern African Savanna

1991 ◽  
Vol 137 (1) ◽  
pp. 50-63 ◽  
Author(s):  
John P. Bryant ◽  
Ignas Heitkonig ◽  
Peggy Kuropat ◽  
Norman Owen-Smith
Keyword(s):  
Woody Species ◽  
Leaf Chemistry ◽  
African Savanna ◽  
Insect Attack

scholarly journals Water availability, bedrock, disturbance by herbivores, and climate determine plant diversity in South-African savanna

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Martin Hejda ◽  
Jan Čuda ◽  
Klára Pyšková ◽  
Guin Zambatis ◽  
Llewellyn C. Foxcroft ◽  
...  
Keyword(s):  
Species Richness ◽  
South African ◽  
Plant Diversity ◽  
Water Availability ◽  
Large Scale ◽  
Woody Species ◽  
Plant Species Richness ◽  
African Savanna ◽  
Shrub Species ◽  
Large Herbivores

AbstractTo identify factors that drive plant species richness in South-African savanna and explore their relative importance, we sampled plant communities across habitats differing in water availability, disturbance, and bedrock, using the Kruger National Park as a model system. We made plant inventories in 60 plots of 50 × 50 m, located in three distinct habitats: (i) at perennial rivers, (ii) at seasonal rivers with water available only during the rainy season, and (iii) on crests, at least ~ 5 km away from any water source. We predicted that large herbivores would utilise seasonal rivers’ habitats less intensely than those along perennial rivers where water is available throughout the year, including dry periods. Plots on granite harboured more herbaceous and shrub species than plots on basalt. The dry crests were poorer in herb species than both seasonal and perennial rivers. Seasonal rivers harboured the highest numbers of shrub species, in accordance with the prediction of the highest species richness at relatively low levels of disturbance and low stress from the lack of water. The crests, exposed to relatively low pressure from grazing but stressed by the lack of water, are important from the conservation perspective because they harbour typical, sometimes rare savanna species, and so are seasonal rivers whose shrub richness is stimulated and maintained by the combination of moderate disturbance imposed by herbivores and position in the middle of the water availability gradient. To capture the complexity of determinants of species richness in KNP, we complemented the analysis of the above local factors by exploring large-scale factors related to climate, vegetation productivity, the character of dominant vegetation, and landscape features. The strongest factor was temperature; areas with the highest temperatures reveal lower species richness. Our results also suggest that Colophospermum mopane, a dominant woody species in the north of KNP is not the ultimate cause of the lower plant diversity in this part of the park.

Woody species composition in an African savanna: determined by centuries of termite activity but modulated by 50 years of ungulate herbivory

2016 ◽  
Vol 27 (4) ◽  
pp. 824-833 ◽  
Author(s):  
Colleen L. Seymour ◽  
Grant S. Joseph ◽  
Milton Makumbe ◽  
Graeme S. Cumming ◽  
Zacheus Mahlangu ◽  
...  
Keyword(s):  
Species Composition ◽  
Woody Species ◽  
African Savanna ◽  
Ungulate Herbivory

scholarly journals Allometric equations for below-ground biomass of four key woody species in West African savanna-woodlands

Silva Fennica ◽  
2017 ◽  
Vol 51 (3) ◽  
Author(s):  
Jonas Koala ◽  
Louis Sawadogo ◽  
Patrice Savadogo ◽  
Ermias Aynekulu ◽  
Janne Heiskanen ◽  
...  
Keyword(s):  
Woody Species ◽  
West African ◽  
Allometric Equations ◽  
African Savanna ◽  
Ground Biomass ◽  
Below Ground

Post-fire resprouting of Colophospermum mopane saplings in a southern African savanna

2006 ◽  
Vol 22 (2) ◽  
pp. 231-234 ◽  
Author(s):  
Donald Mlambo ◽  
Isaac Mapaure
Keyword(s):  
Woody Plants ◽  
Mediterranean Climate ◽  
Woody Species ◽  
Stem Diameter ◽  
Tropical Savannas ◽  
African Savanna ◽  
Colophospermum Mopane ◽  
The Subject ◽  
Plant Attributes ◽  
Resprouting Ability

Fire is a common feature of tropical savannas and it has an important role in the ecology and evolution of the flora. Many woody species in tropical savannas are well adapted to fire and have a vigorous resprouting ability that enables them to survive recurring fire (Frost & Robertson 1987, Hoffmann & Solbrig 2003, Meyer et al. 2005). Studies on the interaction between fire and woody plants in Mediterranean-climate regions have considerably increased our understanding of the subject but relationships between plant attributes (stem diameter and height) and post-fire resprouting ability of southern African savanna woody species are poorly understood. Resprouting is a widespread mechanism by which many plants regenerate after partial or total defoliation (Bellingham & Sparrow 2000, Bond & Midgley 2001).

A comparative study on phenolic profiles and antioxidant activities of Aloe Species

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
A López Monzón ◽  
M Rico Santos ◽  
A Rivero Rosales ◽  
M Suarez de Tangil
Keyword(s):  
Comparative Study ◽  
Antioxidant Activities ◽  
Phenolic Profiles
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