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30 January 2024 Photo SUPPLIED
Prof Frank Zachos
Prof Frank Zachos, an Affiliated Professor in the Department of Genetics, participated in a study on the genetic diversity of species published in the prestigious Nature Ecology & Evolution.

Early this year, an article examining the monitoring of genetic diversity in Europe – indicating which countries are doing it, for which and for how many species – was published in the prestigious Nature Ecology & Evolution. Prof Frank Zachos, an Affiliated Professor in the Department of Genetics at the University of the Free State (UFS) in Bloemfontein, South Africa, participated in this study, which was co-conducted by 52 scientists representing 60 universities and research institutes from 31 countries.

According to Prof Zachos, who is also a scientist and curator of mammals at the Natural History Museum in Vienna in Austria – one of the world’s largest natural history museums with more than 30 million specimens – genetic diversity is crucial for species to adapt to climate change.

Genetic diversity key to species survival

Genetic diversity is one of the keys to species survival. He points out that in 2022, the International Convention on Biological Diversity (CBD) has placed increased emphasis on the need to protect the genetic diversity found in wild species – a fundamental component of biological diversity that has been generally neglected in the past.

Prof Zachos explains that global warming is already putting pressure on many species in Europe and elsewhere, particularly those with populations at the climatic limits of their range. These populations are not only at risk of extinction, but also tend to carry genetic variants favoured by natural selection for survival in challenging environments. “These ecologically peripheral regions may, therefore, function as reservoirs from which, through gene flow, adaptive variants can spread into populations of the core range that will be affected by climate change later. This increases the overall resilience of species,” he says. 

He emphasises that analysing genetic diversity and its changes over time in populations located in areas with challenging environmental conditions is especially important for conservation.

Better monitoring of species needed

In a statement, he mentions that this study reveals that current efforts to monitor genetic diversity in Europe are incomplete and insufficient.

According to the new study, more efforts are necessary, particularly in the southeast of Europe (Turkey and the Balkans), as this region is underrepresented, but at the same time strongly affected by climate change, possibly harbouring many reservoir populations that can adapt well to the challenges posed by environmental shifts.

Prof Zachos adds that monitoring efforts were significantly biased towards certain taxonomic groups, as they have found many monitoring projects targeting large carnivores such as brown bears and wolves, iconic species that are also of political relevance.

He explains that they will, however, be less affected by climate change than, for example, amphibians and many tree species. “Yet, the latter are only rarely included in genetic monitoring projects,” says Prof Zachos, who is of the opinion that a monitoring strategy with less geographic and taxonomic bias, along with systematic targeting of full environmental gradients and high-biodiversity regions, would be an important contribution towards the protection of threatened species – many of which also provide invaluable services to humans, such as crop pollination or pest control.

Better support for ecosystem conservation

He holds the view that this is not only restricted to Europe, but applies globally, especially in superdiverse regions such as Southern Africa.

Prof Zachos states that, considering recent agreements aimed at halting biodiversity decline – of which South Africa is a signatory country – the study also points out the urgent need for improved international monitoring of species, and especially their genetic diversity. “This will facilitate better land-use planning and support for ecosystem conservation and restoration actions, ensuring the survival of species and the services they provide,” he says.

News Archive

DF Malherbe Memorial Lecture
2005-05-19

DF Malherbe Memorial Lecture: Language and language activism in a time of transformation (summary)
Proff Hennie van Coller and Jaap Steyn

Language activism necessary for multilingualism
The awareness is growing that language activism will be needed to bring about a truly democratic multi-lingual society. What is quite clear is that a firm resolve must continuously resist the concentrated pressure on Afrikaans-medium schools (and universities) to allow themselves to be anglicised through becoming first parallel medium, then dual medium, and finally English medium institutions.

Proff Hennie van Coller and Jaap Steyn said this last night (Wednesday night) in the 24th DF Malherbe Memorial Lecture at the University of the Free State. Prof van Coller is head of the Department Afrikaans, Dutch, German and French at the UFS. Both are widely honoured for their contributions to Afrikaans and the promotion of Afrikaans.

They discussed three periods of transformation since 1902, and said about the current phase, which started in 1994:  “Besides all institutions and councils having to be representative of South Africa’s racial composition, places of education were required to open their doors. Quite rapidly this policy has had the result that schools and universities may be solely English medium, but not solely Afrikaans medium. Afrikaans medium institutions — if they claim the right to remain Afrikaans — are quickly branded racist, even though their student body may include all races.

“Education departments are presently exerting great pressure on Afrikaans medium schools to become double or parallel medium schools.  Parallel medium education is an equitable solution provided it can be sustained. Established parallel medium schools, such as Grey College in Bloemfontein, have catered even-handedly for English and Afrikaans speakers for decades. But the situation is different in the parallel medium (and still worse in the double medium) schools that spring up usually at the behest of a department of education.

“Afrikaans schools are converted almost over-night into parallel or dual medium schools without any additional personnel being provided. Depending on the social environment, a parallel medium school becomes reconstituted as a dual medium school on average in five to eight years, and dual medium school becomes an English-only school in two to three years. Some Afrikaans medium schools have become English medium in just three years.

“Though the Constitution recognises mono-lingual schools, officials in the provinces insist that Afrikaans schools become dual or parallel medium; English medium schools are left undisturbed. One must conclude that the tacit aim of the state is English as the sole official language, despite the lip-service paid to multi-lingualism, and the optimistic references to post-apartheid South Africa as a ‘rainbow’ nation.”

They said a recent study has shown that the 1 396 Afrikaans schools in the six provinces in 1993 have dwindled to 844. The fall off in the Free State is from 153 to 97; in the Western Cape from 759 to 564; in Gauteng from 274 to 155; in Mapumalanga from 90 to 3; in the North West from 82 to 13; and in Limpopo Province from 38 to 12.

They said the changes at universities, too, have been severe, as university staffs well know. Ten years ago there were five Afrikaans universities. Today there are none. The government demanded that all universities be open to all, which has meant that all universities have had to become English medium. And no additional funding was forthcoming for the changes. The government policy amounts to a language “tax” imposed on the Afrikaans community for using Afrikaans.

“Only when all schools (and universities) are English will the clamor cease. Academics and educationists are beginning to speak openly of forming pressure groups to save Afrikaans schools, and of using litigation as one of their methods. 59% of Afrikaans parents have said they would support strong action if Afrikaans were no longer a medium of instruction at schools.”

 

 


 

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