Dr Casper Crous

Research Fellow


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I am an ecologist, who comes from a conservation background, and have worked with both flora and invertebrates. My current research is to try and gain insight into how the physical environment influences plants, and what this means for pathogenic manifestations. There is a need for in-depth knowledge of specific environmental conditions that allow trees to either grow more vigorously, or show stress, and then to relate the observed pest and pathogen communities to this gradient. Understanding the ecological basis of plant-herbivore patterns would complement existing research in alleviating current tree die-back problems in either plantation forestry, or native forests.

Crous CJ, Jacobs SM & Esler KJ (2011). Conserving our rivers: a meander along riparian zones. Quest, 7(4), 38-41


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Crous CJ. (2015) Develop energy from shale with local ecosystems in mind. South African Journal of Science 111(3/4) 10.17159/sajs.2015/a0101 PDF
Crous CJ, Roets F. (2014) Realising the value of continuous monitoring programmes for biodiversity conservation. South African Journal of Science 110(11/12):1-5. 10.1590/sajs.2014/a0083 PDF
Crous CJ. (2014) Judge research impact on a local scale. Nature 513(7516):7. 10.1038/513007a
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Human ZR, Crous CJ, Roets F, Venter SN, Wingfield MJ, de Beer ZW. (2018) Biodiversity and ecology of flower-associated actinomycetes in different flowering stages of Protea repens. Antonie van Leeuwenhoek 111(2):209-226. 10.1007/s10482-017-0942-3
Vivas M, Crous CJ, Dames JF, van der Linde JA, Coetzee MPA, Roux J. (2018) Arbuscular mycorrhizal fungi persist in dying Euphorbia ingens trees. South African Journal of Botany 115:12-17. 10.1016/j.sajb.2017.12.009
Crous CJ, Burgess TI, Le Roux JJ, Richardson DM, Slippers B, Wingfield MJ. (2017) Ecological disequilibrium drives insect pest and pathogen accumulation in non-native trees. AoB Plants 9:plw081. 10.1093/aobpla/plw081
Van der Linde JA, Wingfield MJ, Crous CJ, Six DL, Roux J. (2017) Landscape degradation may contribute to large-scale die-offs of Euphorbia ingens in South Africa. South African Journal of Botany 111:144-152. 10.1016/j.sajb.2017.03.022 PDF
Osorio JA, Crous CJ, Wingfield MJ, De Beer ZW, Roux J. (2017) An assessment of mangrove diseases and pests in South Africa. Forestry 90(3):343-358. 10.1093/forestry/cpw063
Osorio JA, Crous CJ, de Beer ZW, Wingfield MJ, Roux J. (2017) Endophytic Botryosphaeriaceae, including five new species, associated with mangrove trees in South Africa. Fungal Biology 121(4):361-393. 10.1016/j.funbio.2016.09.004
Burgess TI, Crous CJ, Slippers B, Hantula J, Wingfield MJ. (2016) Tree invasions and biosecurity: eco-evolutionary dynamics of hitchhiking fungi. AoB Plants 8:plw076. 10.1093/aobpla/plw076
Crous CJ, Malan FS, Wingfield MJ. (2016) Securing African forests for future drier climates: applying ecophysiology in tree improvement. Southern Forests 78(4):241-254. 10.2989/20702620.2016.1207131
Crous CJ, Pryke JS, Samways MJ. (2015) Conserving a geographically isolated Charaxes butterfly in response to habitat fragmentation and invasive alien plants. Koedoe 57(1):1-9. 10.4102/koedoe.v57i1.1297
Pratt RB, MacKinnon ED, Venturas MD, Crous CJ, Jacobsen AL. (2015) Root resistance to cavitation is accurately measured using a centrifuge technique. Tree Physiology 35(2):185-196. 10.1093/treephys/tpv003
Crous CJ, Samways MJ, Pryke JS. (2014) Grasshopper assemblage response to surface rockiness in Afro-montane grasslands. Insect Conservation and Diversity 7:185-194. 10.1111/icad.12044
Crous CJ, Samways MJ, Pryke JS. (2014) Rockiness determines meso-scale conservation of butterflies in Afro-montane grassland. Journal of Insect Conservation 18:77-83. 10.1007/s10841-014-9616-x
Drake DC, Maritz B, Jacobs SM, Crous CJ, Engelbrecht A, Etale A, Fourie MJ, Furniss DG, Scott SL, Parusnath S, Tye DR. (2013) The propagation and dispersal of misinformation in ecology: Is there a relationship between citation accuracy and journal impact factor?. Hydrobiologia 702:1-4. 10.1007/s10750-012-1392-6
Crous CJ, Samways MJ, Pryke JS. (2013) Exploring the mesofilter as a novel operational scale in conservation planning. Journal of Applied Ecology 50:205-214. 10.1111/1365-2664.12012
Crous CJ, Samways MJ, Pryke JS. (2013) Associations between plant growth forms and surface rockiness explain plant diversity patterns across an Afro-montane grassland landscape. South African Journal of Botany 88:90-95. 10.1016/j.sajb.2013.05.006
Crous CJ, Jacobs SM, Esler KJ. (2012) Wood anatomical as a measure of plant responses to water availability: invasive Acacia mearnsii De Wild. compared with native tree species in fynbos riparian ecotones, South Africa. Trees 26:1527-1536. 10.1007/s00468-012-0726-3
Crous CJ, Jacobs SM, Esler KJ. (2012) Drought-tolerance of an invasive alien tree, Acacia mearnsii and two native competitors in fynbos riparian ecotones. Biological Invasions 14(3):619-631. 10.1007/s10530-011-0103-y PDF