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Invasion debt – quantifying future biological invasions

Rouget, M.; Robertson, M.P.; Wilson, J.R.U.; Hui, C.; Essl, F.; Renteria, J.L.; Richardson, D.M. (John Wiley & Sons Ltd, 2016)

Aim We develop a framework for quantifying invasions based on lagged trends in invasions (‘invasion debt’) with the aim of identifying appropriate metrics to quantify delayed responses at different invasion stages – from ...

Trophic ecology and persistence of invasive silver carp Hypophthalmichthys molitrix in an oligotrophic South African impoundment

Lubcker, N.; Dabrowski, J.; Zengeya, T.A.; Oberholster, P.J.; Hall, G.; Woodborne, S.; Roberston, M.P. (NISC (Pty) Ltd and Taylor & Francis, 2016)

The alien invasive silver carp Hypophthalmichthys molitrix established a self-sustaining feral population in an oligotrophic impoundment, Flag Boshielo Dam, in South Africa. The ability of this population to persist in a ...

Reconsidering environmental diversity (ED) as a biodiversity surrogacy strategy

Engelbrecht, I.; Robertson, M.; Stolz, M.; Joubert, J.W. (Elsevier Ltd., 2016)

Environmental Diversity (ED) has been proposed as a potential biodiversity surrogate for use in spatial biodiversity planning. The concept is based on the premise that differences in species composition between areas are ...

Understanding and managing the introduction pathways of alien taxa: South Africa as a case study

Faulkner, K.T.; Robertson, M.P.; Rouget, M.; Wilson, J.R.U. (Springer, 2016)

For the effective prevention of biological invasions, the pathways responsible for introductions must be understood and managed. However introduction pathways, particularly for developing nations, have been understudied. ...

Ant assemblages have darker and larger members in cold environments

Bishop, T.R.; Robertson, M.P.; Gibb, H.; van Rensburg, B.J.; Braschler, B.; Chown, S.L.; Foord, S.H.; Munyai, T.C.; Okey, I.; Tshivhandekano, P.G.; Werenkraut, V.; Parr, C.L. (John Wiley & Sons Ltd, 2016)

Aim In ectotherms, the colour of an individual’s cuticle may have important thermoregulatory and protective consequences. In cool environments, ectotherms should be darker, to maximize heat gain, and larger, to minimize ...

Predicted decrease in global climate suitability masks regional complexity of invasive fruit fly species response to climate change

Hill, M.P.; Bertelsmeier, C.; Clusella-Trullas, S.; Garnas, J.; Robertson, M.P.; Terblanche, J.S. (Springer, 2016)

Climate change affects the rate of insect invasions as well as the abundance, distribution and impacts of such invasions on a global scale. Among the principal analytical approaches to predicting and understanding future ...

Border control for stowaway alien species should be prioritised based on variations in establishment debt

Faulkner, K.T.; Robertson, M.P.; Rouget, M.; Wilson, J.R.U. (Elsevier Ltd, 2016)

Border control is one of the major approaches used by countries to limit the number of organisms introduced as stowaways. However, it is not feasible to inspect all passengers, cargo and vehicles entering a country, and ...

Seasonal variation in the relative dominance of herbivore guilds in an African savanna

Davies, A.B.; J. van Rensburg, B.; Robertson, M.P.; Levick, S.R.; Asner, G.P.; Parr, C.L. (Ecological Society of America, 2016)

African savannas are highly seasonal with a diverse array of both mammalian and invertebrate herbivores, yet herbivory studies have focused almost exclusively on mammals. We conducted a 2-yr exclosure experiment in South ...

Non-native and native organisms moving into high elevation and high latitude ecosystems in an era of climate change: new challenges for ecology and conservation

Pauchard, A.; Milbau, A.; Albihn, A.; Alexander, J.; Burgess, T.; Daehler, C.; Englund, G.; Essl, F.; Evengard, B.; Greenwood, G.B.; Haider, S.; Lenoir, J.; McDougall, K.; Muths, E.; Nunez, M.A.; Olofsson, J.; Pellissier, L.; Rabitsch, W.; Rew, L.J.; Robertson, M.; Sanders, N.; Kueffer, C. (Springer, 2016)

Cold environments at high elevation and high latitude are often viewed as resistant to biological invasions. However, climate warming, land use change and associated increased connectivity all increase the risk of biological ...

Evaluating habitat connectivity methodologies: a case study with endangered African wild dogs in South Africa

Jackson, C.R.; Marnewick, K.; Lindsey, P.A.; Roskaft, E.; Robertson, M.P. (Springer, 2016)

Context In fragmented landscapes, connectivity between subpopulations is vital for species’ persistence. Various techniques are used to assess the degree of connectivity between habitat patches, yet their performance is ...