Now showing items 31-40 of 114
Soil type, microsite, and herbivory influence S.molle growth
The study involved a field manipulation experiment over 14 months using a factorial block design to examine transplanted seedlings in different savanna environments. The experiments examine the effects of soil type (sandy ...
Water stress tolerance of shrubs in Mediterranean-type climate regions: convergence of fynbos and succulent Karoo communities with California shrub communities
(Botanical Society of America, Inc., 2009)
Mediterranean-type climate regions are highly biodiverse and predicted to be particularly sensitive to climate change. Shrubs of the mediterranean-type climate region of South Africa are highly threatened, and their ...
Megastigmus wasp damage to seeds of Schinus molle
Understanding the reasons why some alien species become invasive may help to identify appropriate management strategies. One hypothesis often cited to explain invasion success is the enemy release hypothesis (Williams 1954; ...
When is a species not a species? Uncoupled phenotypic, karyotypic and genotypic divergence in two species of South African laminate-toothed rats (Murinae: Otomyini)
(The Zoological Society of London, 2009)
Chromosomal polytypy, morphological conservatism and absence of data have frustrated the taxonomic revision of two species of southern African-endemic laminate-toothed rats (Otomys irroratus and Otomys saundersiae s.l.). ...
A standardized response to biological invasions
The effect of ploughing and augmenting natural vegetation with commercial fynbos species on the biodiversity of Overberg Sandstone fynbos on the Agulhas Plain, South Africa
(Elsevier B.V., 2009)
In an attempt to reconcile wildflower cultivation with plant diversity conservation, we investigate the effect that different augmentation techniques (including ploughing and burning) have on the plant diversity of the ...
Disease outbreaks among penguins at sub-Antarctic Marion Island: a conservation concern
(An International Peer-Reviewed Journal of Seabird Science and Conservation, 2009)
In 1992 and 1993, unknown diseases killed 250–300 King Penguins Aptenodytes patagonicus and an estimated 5–10 thousand Macaroni Penguins Eudyptes chrysolophus at sub-Antarctic Marion Island. At the same island, an outbreak ...
Effects of invasion of fire-free arid shrublands by a fire-promoting invasive alien grass (Pennisetum setaceum) in South Africa
(Ecological Society of Australia, 2009)
Arid shrublands in the Karoo (South Africa) seldom accumulate sufficient combustible fuel to support fire. However, as a result of invasion by an alien perennial grass (Pennisetum setaceum), they could become flammable. ...
Ecology and management of alien plant invasions in South African fynbos: Accommodating key complexities in objective decision making
Invasive alien trees and shrubs pose significant threats to biodiversity and ecosystem services in South African fynbos ecosystems. An ambitious initiative, the Working for Water program, commenced in 1995 to reduce the ...
The evolution of fire management practices in savanna protected areas in South Africa
The history and development of ecologically-based fire management policies in savanna protected areas during the 20th century are reviewed. Research on fire in savannas began in the 1950s, and from the 1980s onwards, ...