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Indirect effects of habitat disturbance on invasion : nutritious litter from a grazing resistant plant favors alien over native Collembola

Leinaas, Hans Petter; Bengtsson, Jan; Janion-Scheepers, Charlene; Chown, Steven L. (John Wiley & Sons Ltd., 2015)

Biological invasions are major threats to biodiversity, with impacts that may be compounded by other forms of environmental change. Observations of high density of the invasive springtail (Collembola), Hypogastrura manubrialis ...

Antarctic marine biodiversity and deep-sea hydrothermal vents

Chown, Steven L. (Public Library of Science -- PLOS, 2012-01)

The diversity of many marine benthic groups is unlike that of most other taxa. Rather than declining from the tropics to the poles, much of the benthos shows high diversity in the Southern Ocean. Moreover, many species are ...

Updated list of Collembola species currently recorded from South Africa

Janion-Scheepers, Charlene; Deharveng, Louis; Bedos, Anne; Chown, Steven L. (Pensoft, 2015-05)

Understanding the abundance and richness of species is one of the most fundamental steps in effecting their conservation. Despite global recognition of the significance of the below-ground component of diversity for ...

Desiccation tolerance as a function of age, sex, humidity and temperature in adults of the African malaria vectors Anopheles arabiensis and Anopheles funestus

Lyons, Candice L.; Coetzee, Maureen; Terblanche, John S.; Chown, Steven L. (The Company of Biologists, 2014-09)

Adult mosquito survival is strongly temperature and moisture dependent. Few studies have investigated the interacting effects of these variables on adult survival and how this differs among the sexes and with age, despite ...

Critical thermal limits and their responses to acclimation in two sub-Antarctic spiders : Myro kerguelenensis and Prinerigone vagans

Jumbam, K. R.; Terblanche, J. S.; Deere, J. A.; Somers, M. J.; Chown, Steven L. (Springer-Verlag, 2008-01)

Despite the relative richness of spider species across the Southern Ocean islands remarkably little information is available on their biology. Here, the critical thermal limits of an indigenous (Myro kerguelenensis, Desidae) ...

The extent and impacts of ungulate translocations : South Africa in a global context

Spear, Dian; Chown, Steven L. (Elsevier, 2009-02)

Despite the apparent risks of the introduction of non-indigenous ungulates to biodiversity, relatively little is known globally about the pathways of introduction, propagule pressure and realized impacts of ungulate ...

Springtail diversity in South Africa

Janion, Charlene; Bedos, Anne; Bengtsson, Jan; Deharveng, Louis; Janse Van Vuuren, Bettine; Leinaas, Hans Petter; Liu, Amy; Malmstrom, Anna; Porco, David; Chown, Steven L. (Academy of Science of South Africa (ASSAf), 2011-11)

Despite their significance in soil ecosystems and their use for investigations of soil ecosystem functioning and in bioindication elsewhere, springtails (Collembola) have not been well investigated in South Africa. Early ...

South African research in the Southern Ocean : new opportunities but serious challenges

Treasure, Anne M.; Moloney, Coleen L.; Bester, Marthan N.; McQuaid, Christopher D.; Findlay, Ken P.; Best, Peter B.; Cowan, Don A.; De Bruyn, P. J. Nico; Dorrington, Rosemary A.; Fagereng, Ake; Froneman, P. William; Grantham, Geoff H.; Hunt, Brian P. V.; Meiklejohn, Ian; Pakhomov, Evgeny A.; Roychoudhury, Alakendra N.; Ryan, Peter G.; Smith, Valdon R.; Chown, Steven L.; Ansorge, Isabelle J. (Academy of Science of South Africa, 2013)

South Africa has a long track record in Southern Ocean and Antarctic research and has recently invested considerable funds in acquiring new infrastructure for ongoing support of this research. This infrastructure includes ...

Thermal tolerance in a south-east African population of the tsetse fly Glossina pallidipes (Diptera, Glossinidae) : implications for forecasting climate change impacts

Terblanche, John S.; Clusella-Trullas, Susana; Deere, Jacques A.; Chown, Steven L. (2008-01)

For tsetse (Glossina spp.), the vectors of human and animal trypanosomiases, the physiological mechanisms linking variation in population dynamics with changing weather conditions have not been well established. Here, we ...

Basal metabolic rate of the black-faced sheathbill (chionis minor) : intraspecific variation in a phylogenetically distinct island endemic

McClelland, Gregory T. W.; McKechnie, Andrew E.; Chown, Steven L. (University of Chicago Press Journals, 2016)

Metabolic rate is a fundamental characteristic of all organisms. It covaries most significantly with activity, body mass, seasonality, and temperature. Nonetheless, substantial additional variation in metabolic rate, ...