Casper Nyamukondiwa

Prof. Casper Nyamukondiwa

orcid

Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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28 January 2021 in New Phytologist
Verified
Journal Article
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JDJohn Davison
John Davison
MMMari Moora
Mari Moora
MSMarina Semchenko
Marina Semchenko
SASakeenah Binte Adenan
Sakeenah Binte Adenan
TATalaat Ahmed
Talaat Ahmed
MÖMaarja Öpik
Maarja Öpik

1 December 2023 in Science Advances
Verified
Journal Article
Open access
VMVladimir Mikryukov
Vladimir Mikryukov
ODOlesya Dulya
Olesya Dulya
AZAlexander Zizka
Alexander Zizka
MBMohammad Bahram
Mohammad Bahram
NHNiloufar Hagh-Doust
Niloufar Hagh-Doust
LTLeho Tedersoo
Leho Tedersoo
How the multiple facets of soil fungal diversity vary worldwide remains virtually unknown, hindering the management of this essential species-rich group. By sequencing high-resolution DNA markers in over 4000 topsoil samples from natural and human-altered ecosystems across all continents, we illustrate the distributions and drivers of different levels of taxonomic and phylogenetic diversity of fungi and their ecological groups. We show the impact of precipitation and temperature interactions on local fungal species richness (alpha diversity) across different climates. Our findings reveal how temperature drives fungal compositional turnover (beta diversity) and phylogenetic diversity, linking them with regional species richness (gamma diversity). We integrate fungi into the principles of global biodiversity distribution and present detailed maps for biodiversity conservation and modeling of global ecological processes.

29 June 2018 in Scientific Reports
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Journal Article
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CWChristopher Weldon
Christopher Weldon
CNCasper Nyamukondiwa
Casper Nyamukondiwa
MKMinette Karsten
Minette Karsten
SCSteven L. Chown
Steven L. Chown
JTJohn S Terblanche
John S Terblanche
Traits of thermal sensitivity or performance are typically the focus of species distribution modelling. Among-population trait variation, trait plasticity, population connectedness and the possible climatic covariation thereof are seldom accounted for. Here, we examine multiple climate stress resistance traits, and the plasticity thereof, for a globally invasive agricultural pest insect, the Mediterranean fruit fly, Ceratitis capitata (Wiedemann) (Diptera: Tephritidae). We also accounted for body size and population genetic connectivity among distinct populations from diverse bioclimatic regions across southern Africa. Desiccation resistance, starvation resistance, and critical thermal minimum (CTmin) and maximum (CTmax) of C. capitata varied between populations. For thermal tolerance traits, patterns of flexibility in response to thermal acclimation were suggestive of beneficial acclimation, but this was not the case for desiccation or starvation resistance. Population differences in measured traits were larger than those associated with acclimation, even though gene flow was high. Desiccation resistance was weakly but positively affected by growing degree-days. There was also a weak positive relationship between CTmin and temperature seasonality, but CTmax was weakly but negatively affected by the same bioclimatic variable. Our results suggest that the invasive potential of C. capitata may be supported by adaptation of tolerance traits to local bioclimatic conditions.

6 November 2020 in Insects
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VTVimbai Lisa Tarusikirwa
Vimbai Lisa Tarusikirwa
HMHonest Machekano
Honest Machekano
RMReyard Mutamiswa
Reyard Mutamiswa
FCFrank Chidawanyika
Frank Chidawanyika
CNCasper Nyamukondiwa
Casper Nyamukondiwa
The South American tomato pinworm Tuta absoluta (Meyrick) has aggressively invaded the African continent. Since its first detection in North Africa in Morocco and Tunisia in 2008, it has successfully invaded the entire southern, eastern and western Africa, where it has been on the offensive, causing significant damage to Solanaceous food crops. While control of this prolific invader is primarily based on conventional synthetic pesticides, this form of control is consistently losing societal approval owing to (1) pesticide resistance development and consequential loss of field efficacy; (2) growing public health concerns; (3) environmental contamination and loss of biological diversity and its associated ecological services; and (4) unsustainable costs, particularly for resource-poor African farmers. As such, more ecologically sound pest management strategies, e.g., the use of natural substances (NSs), may offer a more sustainable approach to tackling this offensive. A systematic literature search through digital libraries and online databases (JSTOR, PubMed, Web of Science, SCOPUS and Google Scholar) was conducted using predetermined keywords on T. absoluta, e.g., South American tomato pinworm. We use this to explain the invasion of T. absoluta in Africa, citing mechanisms facilitating African invasion and exploring the potential of its control using diverse biological control agents, natural and low-risk substances. Specifically, we explore how botanicals, entomopathogens, semiochemicals, predators, parasitoids, host plant resistance, sterile insect technique and others have been spatially employed to control T. absoluta and discuss the potential of these control agents in African landscapes using more integrated approaches. We discuss the use of NSs as assets to general insect pest control, some potential associated liabilities and explain the potential use and barriers to adoption in African systems from a legislative, economic, ecological and social standpoint.

1 March 2018 in Biological Control
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Journal Article
Closed access
HMHonest Machekano
Honest Machekano
BMBrighton M. Mvumi
Brighton M. Mvumi
CNCasper Nyamukondiwa
Casper Nyamukondiwa

16 November 2017 in Journal of Evolutionary Biology
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Journal Article
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NGN. Gotcha
N. Gotcha
JTJohn S Terblanche
John S Terblanche
CNCasper Nyamukondiwa
Casper Nyamukondiwa