Browsing RESEARCH: Le Roux, JJ by Issue Date
Now showing items 1-20 of 69
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Evidence of repeated and independent saltational evolution in a peculiar genus of sphinx moths(Proserpinus: Sphingidae)
(Public Library of Science, 2008-12-24)Background: Saltational evolution in which a particular lineage undergoes relatively rapid, significant, and unparalleled change as compared with its closest relatives is rarely invoked as an alternative model to the ... -
Molecular systematics and population genetics of biological invasions: towards a better understanding of invasive species management
(Association of Applied Biologists, 2009)The study of population genetics of invasive species offers opportunities to investigate rapid evolutionary processes at work, and while the ecology of biological invasions has enjoyed extensive attention in the past, the ... -
Molecular data reveals California as the potential source of an invasive leafhopper species, Macrosteles sp. nr. severini, transmitting the aster yellows phytoplasma in Hawaii
(Association of Applied Biologists, 2009)A species of aster leafhopper (Macrosteles sp.) became established in 2001 on Oahu, Hawaii, and through the transmission of the aster yellows phytoplasma, caused devastating losses to the island’s watercress industry. DNA ... -
Evaluating the invasiveness of Acacia paradoxa in South Africa
(2009-08-13)We present the first detailed survey of a population of Acacia paradoxa DC. (syn. Acacia armata R.Br.), Kangaroo Thorn, in South Africa. The species is listed under the Conservation of Agricultural Resources Act as a ... -
Disentangling the dynamics of invasive fireweed (Senecio madagascariensis Poir. species complex) in the Hawaiian Islands
(Springer Science+Business Media B.V., 2010)Studies investigating the genetic variation of invasive species render opportunities to better understand the dynamics of biological invasions from an ecological and evolutionary perspective. In this study, we investigate ... -
Molecular systematics and ecology of invasive kangaroo paws in South Africa: management impications for a horticulturally important genus
(SpringerLink, 2010)Most legislation pertaining to non-native organisms is implicitly focussed at the individual species level. However, in some cases interspecific hybrids can be more invasive than any of the parent species. This is problematic ... -
Modelling horses for novel climate courses: insights from projecting potential distributions of native and alien Australian acacias with correlative and mechanistic models
(Blackwell Publishing Ltd, 2011)Aim Investigate the relative abilities of different bioclimatic models and data sets to project species ranges in novel environments utilizing the natural experiment in biogeography provided by Australian Acacia ... -
Phylogeographic consequences of different introduction histories of invasive Australian Acacia species and Paraserianthes lophantha (Fabaceae) in South Africa
(Blackwell Publishing Ltd, 2011)Aim The genetic makeup and evolutionary potential of alien species can be profoundly influenced by their introduction history, but without detailed historical records, it can be difficult to ascertain the strength of ... -
Human-mediated introductions of Australian acacias – a global experiment in biogeography
(Blackwell Publishing Ltd, 2011)Aim Australian acacias (1012 recognized species native to Australia, which were previously grouped in Acacia subgenus Phyllodineae) have been moved extensively around the world by humans over the past 250 years. This has ... -
Reproductive biology of Australian acacias: important mediator of invasiveness?
(Blackwell Publishing Ltd, 2011)Aim Reproductive traits are important mediators of establishment and spread of introduced species, both directly and through interactions with other life-history traits and extrinsic factors. We identify features of the ... -
Predicting the subspecific identity of invasive species using distribution models: Acacia saligna as an example
(Blackwell Publishing Ltd, 2011)Aim To explore whether the subspecific genetic entities of Acacia saligna occupy different bioclimatic niches in their native and introduced ranges and whether these niches are predictable using species distribution models ... -
Jack-of-all-trades and master of many? How does associated rhizobial diversity influence the colonization success of Australian Acacia species?
(Blackwell Publishing Ltd, 2011)Aim To evaluate the role of rhizobial diversity, and symbiotic promiscuity, on the invasive ability of Australian acacias (Acacia species in subgenus Phyllodineae native to Australia). Location Global. Methods A ... -
Development and characterization of 13 new, and cross amplification of 3, polymorphic nuclear microsatellite loci in the common myna (Acridotheres tristis).
(2012)We used a next generation sequencing (NGS) approach to screen for genome-wide nuclear microsatellite loci in the common (Indian) myna, Acridotheres tristis. In addition, markers previously developed for other Sturnidae ... -
No consistent association between changes in genetic diversity and adaptive responses of Australian acacias in novel ranges.
(2012)Common garden studies comparing trait differences of exotic species between native and introduced ranges rarely incorporate an analysis of genetic variation, but simply infer that trait shifts between ranges are genetically ... -
Spatial sorting drives morphological variation in the invasive brid, Acridotheris tristis.
(2012)The speed of range expansion in many invasive species is often accelerating because individuals with stronger dispersal abilities are more likely to be found at the range front. This ‘spatial sorting’ of strong dispersers ... -
Invasion dynamics of Lantana camara L. (sensu lato) in South Africa.
(2012)Lantana camara L. (sensu lato) has a wide range of impacts throughout its global invasive range. Here we review the mechanisms driving its invasion dynamics in South Africa at national (biome, habitat) and regional (within ... -
Cultivation shapes genetic novelty in a globally important invader.
(2012)Acacia saligna is a species complex that has become invasive in a number of countries worldwide where it has caused substantial environmental and economic impacts. Understanding genetic and other factors contributing to ... -
Getting here from there: testing the paradigm of invasion success
(2012)Aim To explore the potential of genetic processes and mating systems to influence successful plant invasions, we compared genetic diversity of the highly invasive tropical treelet, Miconia calvescens, in nine invasive ... -
Distribution and management of Acacia implexa (Benth.) in South Africa: A suitable target for eradication?
(Elsevier, 2012)This study is the first detailed assessment of an invasion by Acacia implexa (Benth.) (screw-pod wattle) anywhere in the world. Approximately 30 000 A. implexa individuals were found spread over about 600 ha (a condensed ... -
The more the better? The role of polyploidy in facilitating plant invasions
(Oxford University Press, 2012)† Background Biological invasions are a major ecological and socio-economic problem in many parts of the world. Despite an explosion of research in recent decades, much remains to be understood about why some species ...