Browsing RESEARCH: Foxcroft, L by Issue Date
Now showing items 1-20 of 42
-
Reconstructing 50 years of Opuntia stricta invasion in the Kruger National Park, South Africa: environmental determinants and propagule pressure
(2004-11-01)Many factors influence the spread dynamics and distribution of invasive alien organisms. Despite progress in unravelling the determinants of invasiveness and invasibility, robust, spatially-explicit predictive models for ... -
What helps Opuntia stricta invade Kruger National Park South Africa: Baboons or elephants?
(IAVS; Opulus Press Uppsala, 2007)Question: Is Opuntia stricta more frequent, and its patches larger, under trees suitable for baboon roosting? If so, does it mean that baboons are major dispersal agents and that plants established under these trees are ... -
Risk Assessment of Riparian Plant Invasions into Protected Areas
(2007-03-28)Protected areas are becoming increasingly isolated. River corridors represent crucial links to the surrounding landscape but are also major conduits for invasion of alien species. We developed a framework to assess the ... -
Interference potential of the perennial grasses Eragrostis curvula, Panicum maximum and Digitaria eriantha with Parthenium hysterophorus
(Tropical Grasslands Society of Australia, 2008)The successful invasiveness of Parthenium hysterophorus (parthenium) is attributed to its competitive ability and high allelopathic potential. The compound, parthenin, has been implicated as a major allelochemical in ... -
Protecting biodiversity by managing alien plants in national parks: perspectives from South Africa and Australia
(Backhuys Publishers, Leiden, The Netherlands., 2008)Conservation of biodiversity, in all its facets and fluxes, is the primary motivation for the development of protected areas. However, designating land as a protected area does not necessarily result in the conservation ... -
Ornamental plants as invasive aliens: problems and solutions in Kruger National Park, South Africa
(Springer Science+Business Media, LLC, 2008)The most widespread invasive alien plant species in South Africa’s Kruger National Park (KNP) were either introduced unintentionally along rivers and roads, or intentionally for use as ornamentals. We examine the spatial ... -
Patterns of alien plant distribution in a river landscape following an extreme flood
(Elsevier B.V, 2008)The availability of suitable patches and gaps in the landscape is a crucial determinant of invasibility for alien plants. The type and arrangement of patches in the landscape may both facilitate and obstruct alien plant ... -
Patterns of alien plant distribution at multiple spatial scales in a large national park: implications for ecology, management and monitoring
(Blackwell Publishing Ltd, 2009)Aim Spatial scale is critical for understanding and managing biological invasions. In providing direction to managing alien plant invasions, much emphasis is placed on collecting spatially explicit data. However, insufficient ... -
Developing thresholds of potential concern for invasive alien species: hypotheses and concepts.
(OpenJournals Publishing, 2009)The Kruger National Park (KNP) has developed and refined a system of management called ‘strategic adaptive management’ (SAM), which rests on the concept of ‘thresholds of potential concern’ (TPC). TPCs represent end-points ... -
Alien plant invasions in tropical savanna ecosystems: patterns, processes and prospects
(Springer, 2010)Biological invasions affect virtually all ecosystems on earth, but the degree to which different regions and biomes are invaded, and the quality of information from different regions, varies greatly. A large body of ... -
Pattern and process of plant invasion in an African savanna ecosystem
(2010-11-25)Biological invasions are a significant ecological and economic global crisis. Protected areas also suffer from the increased burden that invasions place on their resources and the impacts placed on the ecosystem. However, ... -
Protected-area boundaries as filters of plant invasions
(Society for Conservation Biology, 2011)Human land uses surrounding protected areas provide propagules for colonization of these areas by non-native species, and corridors between protected-area networks and drainage systems of rivers provide pathways for ... -
Expanding the conceptual frameworks of plant invasion ecology
(Elsevier GmbH, 2011)Numerous mechanisms driving alien plant invasions have been described in a rapidly growing body of literature. However these are frequently case specific, making generalizations across species and systems difficult. A ... -
Defining optimal sampling effort for large-scale monitoring of invasive alien plants: a Bayesian method for estimating abundance and distribution
(2011)1. Monitoring the abundance and spatial structure of invasive alien plant populations is important for designing and measuring the efficacy of long-term management strategies. However, methods for monitoring over large ... -
Open minded and open access: introducing NeoBiota, a new peer-reviewed journal of biological invasions
(PenSoft, 2011)The Editorial presents the focus, scope, policies, and the inaugural issue of NeoBiota, a new open access peer-reviewed journal of biological invasions. The new journal NeoBiota is a continuation of the former NEOBIOTA ... -
Alien species in South Africa's national parks
(OpenJournals Publishing, 2011)Invasive alien species (IAS) are one of the major threats to biodiversity in protected areas, and pose a significant management challenge (e.g. Pyšek et al. 2002, Allen, Brown & Stohlgren 2009). One of the first steps ... -
Assessing local scale impacts of Opuntia stricta (Cactaceae) invasion on beetle and spider diversity in Kruger National Park, South Africa
(Zoological Society of Southern Africa, 2011)There is a paucity of studies examining direct impacts of introduced alien species on biodiversity, a key need for motivating for alien species control in conservation areas. The introduced prickly pear (Opuntia stricta) ... -
Predicting Incursion of Plant Invaders into Kruger National Park, South Africa: The Interplay of General Drivers and Species-Specific Factors
(Public Library of Science, 2011)Background: Overcoming boundaries is crucial for incursion of alien plant species and their successful naturalization and invasion within protected areas. Previous work showed that in Kruger National Park, South Africa, ... -
The development and application of strategic adaptive management within South African National Parks
(The Authors, 2011)Adaptive management is an appealing approach to deal with inherent uncertainty in complex and interactive social-ecological systems (Holling 2001; Rogers 2003). In short, adaptive management is about learning-by-doing in ... -
Implementing invasive species management in an adaptive management framework
(The Authors, 2011-05-13)Adaptive management theory has attracted substantial interest in recent years, in natural resource management in general and also for invasive alien species management. However, whilst many theoretical and conceptual ...