Now showing items 11-20 of 98
A brief histoty of marine bio-invasions in South Africa
(Zoological Society of South Africa, 2009-10)
Marine species have been introduced continuously into South Africa for more than 400 years, since the arrival of the first European explorers. Various waves of introduction can be identified over this period, each associated ...
Functional group identity does not predict invader impacts: differential effects of nitrogen-fixing exotic plants on ecosystem function
(SPRINGER, VAN GODEWIJCKSTRAAT, 2007-03)
The introduction of exotic plants can have large impacts on ecosystem functions such as soil nutrient cycling. Since these impacts result from differences in traits between the exotic and resident species, novel physiological ...
Spider responses to alien plant invasion: the effect of short- and long-term Chromolaena odorata invasion and management
(British Ecological Society, 2008-07)
Invasions by alien plants into unspoiled ecosystems are a cause for concern because the pristine systems are important stores of biodiversity. Indeed, the introduction of non-indigenous species into protected areas is a ...
The relative importance of environment, human activity and space in explaining species richness of South African bird orders
(Blackwell Publishing Ltd, 2008)
Aim To assess the relative importance of environmental (climate, habitat heterogeneity and topography), human (population density, economic prosperity and land transformation) and spatial (autocorrelation) influences, and ...
Biogeographical patterns in the fauna associated with southern African mussel beds
(ZOOLOGICAL SOC SOUTHERN AFRICA, 2006-04)
Macrofauna communities colonizing intertidal mussel beds were sampled at seven sites between Swakopmund (Namibia) and Salt Rock (KwaZulu-Natal). Mean mussel cover, length, biomass and bed depth were all low in the southeast ...
Road verges as invasion corridors? A spatial hierarchical test in an arid ecosystem
Disturbed habitats are often swiftly colonized by alien plant species. Human inhabited areas may act as sources from which such aliens disperse, while road verges have been suggested as corridors facilitating their dispersal. ...
Micro-scale heterogeneity of spiders (Arachnida: Araneae) in the Soutpansberg, South Africa: a comparative survey and inventory in representative habitats
Coarse-scale studies that focus on species distributions and richness neglects heterogeneity that may be present at finer scales. Studies of arthropod assemblage structure at fine (1 x 1 km) scales are rare, but important, ...
Naturalized Populations of Oysters, Crassostrea Gigas Along the South African Coast: Distribution, Abundance and Population Structure
The Japanese oyster Crassostrea gigas forms the mainstay of the South African oyster farming industry. Despite having been cultured along the South African coast for 30 years, this is the first record of naturalized ...
A scientific note on the drone flight time of Apis mellifera capensis and A. m. scutellata
(INRA/DIB-AGIB/ EDP Sciences, 2007)
Revealing the scale of marine bioinvasions in developing regions: a South African re-assessment
(Springer Science+Business Media B.V., 2011-05)
As recently as 2009 the number of introductions recorded for South Africa comprised 22 marine and estuarine species. This review aims to reassess the diversity and scale of introduced marine and estuarine species in the ...