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Lizard pollinates plant; research finding a first for continental Africa

28 November 2019 | Story Leonie Bolleurs

Read more new — Dr Sandy-Lynn Steenhuisen and Ruth Cozien at a spot high up in the Maloti-Drakensberg World Heritage Site, close to Sentinel Peak, photographing a Drakensberg crag lizard underneath the leaves of the ‘Hidden Flower’.

Flowers high up in the Maloti-Drakensberg World Heritage Site made world news when it was discovered that the Drakensberg Crag Lizard is their sole pollinator.

This first for continental Africa – a plant being pollinated by a lizard – is a discovery by a research group including Dr Sandy-Lynn Steenhuisen, Senior Lecturer in the Department of Plant Sciences and affiliate of the Afromontane Research Unit (ARU) at the Qwaqwa Campus of the University of the Free State (UFS), in collaboration with Dr Timo van der Niet, Prof Steven Johnson, and project leader Ruth Cozien, all from the Pollination Ecology Research Laboratory and Centre for Functional Biodiversity at the University of KwaZulu-Natal.

Besides their work being published in popular news here in South Africa (including an isiZulu article), it has also received coverage in, among others, Belgium, Canada, the Netherlands, and the United States of America.

Is it a bee, a bird, perhaps a mouse?

‘Hidden Flower’, true to its name, is a plant species with flowers hidden at ground level, underneath the leaves of the plant. Like the leaves, the flowers are also green. With the flowers filled with nectar (up to 1 ml per plant) and strongly scented, one concludes that, just as with other flowers, these flowers must be visited by a pollinator. Is it a bee, is it a bird, perhaps a mouse/non-flying mammal?

According to Dr Steenhuisen, who was brought into the project because of her experience with rodents pollinating proteas, many plants are adapted to attract and be pollinated by a specific animal. They attract their pollinators using particular scents and colours and reward them for their service with, for example, nectar, oil, fragrance, and sometimes even shelter.

The ‘Hidden Flower’ initially had the group of researchers thinking that it was being pollinated by a non-flying mammal. “Everything about the plant made it look like it should be mammal-pollinated,” Dr Steenhuisen said.

They investigated all options, using several techniques to assess the contribution of different possible animals to set seed. To further assist them in their quest to find the true pollinator, the team put up motion cameras that recorded activity in the area of the ‘Hidden Flower’.

Great was their surprise when studying the video material after a week of fieldwork in the mountains, finding shy lizards dipping their snouts in the ‘Hidden Flower’ and lapping up the nectar.

Dr Steenhuisen described this discovery as completely bizarre, exciting, and fascinating.

To make 100% sure that lizards are pollinating the ‘Hidden Flower’, these animals were excluded from the plants. Results published in a paper in Ecology showed that when the lizards were experimentally excluded from the plants, the number of seeds produced dropped dramatically by almost 95%. This finding helped to further prove their discovery.

Strong scent and bright orange colour attract

The team researched the new phenomenon and found that although flower visitation by lizards is not unknown, it occurs almost exclusively on oceanic islands. Cozien says one should keep in mind that mountains are like sky islands and might therefore have similarities with oceanic islands in terms of their ecology.

The strong scent and the touch of orange at the base of the inside of the flowers is believed to play an important role in attracting lizards. The little lizard may recognise the spots of orange inside the flowers which resemble the orange colour of a male lizard in mating season, attracting females. Lured by the strong scent and the orange spots, the reptiles stick their snouts into the flower in search of nectar, pollinating the ‘Hidden Flower’; thus, making sure that this flower will continue to grow on the slopes of Sentinel Peak in the Maloti Drakensberg range.

This research finding on lizard pollination, which reads almost like a fairy tale with its islands, hidden flowers, nectar from the gods, and little dragons, shows that there are still many unknown and surprising interactions that need to be discovered and conserved to ensure a healthy ecological system.

The research findings of this study were published in April 2019.

News Archive

Bullying in schools: Everyone’s problem

2005-06-03

From left: Prof Gerhardt de Klerk, Dean: Faculty of the Humanities; Prof Corene de Wet; Prof Rita Niemann, Head of the Department of Comparative Education and Educational Management in the School of Education and Prof Frederick Fourie, Rector and Vice-Chancellor of the UFS

It is not only learners who are the victums of bullying in schools, but also the teachers. Prof. Corene de Wet from the Department Comparative Education and Educational Management at the University of the Free State reported, against the background of two studies on bullying in Free State secondary schools, that bullying is a general phenomena in these schools.

Prof. de Wet, who delivered her inaugural lecture on Wednesday night, is from the Department Comparative Education and Educational Management which resorts under the School of Education at the University of the Free State. She is the first women who became a full professor the School of Education.

Prof. de Wet says, “A student is being bullied or victimized when he or she is exposed, repeatedly and over time, to negative action on the part of one or more students. Bullying always includes the intentional use of aggression, an unbalanced relationship of power between the bully and the victim, and the causing of physical pain and/or emotional misery.

In some Free State schools there are victims and perpetrators of direct and indirect verbal, as well as emotional, physical and sexual bullying.

“Adults who say that bullying are part of the growing-up process and parents who set not only academic expectations but also social expectations to their children cause that victims are unwilling to acknowledge that they are being bulled. Many parents are also unaware of the levels of bullying their children are exposed to.

“Some of the learners were at least once a month the victim of direct verbal harassment, 32,45% were assaulted by co-learners and 11,21% of them were at east once per week beat, kicked, pushed and hurt in any other physical way. Free State learners are very vulnerable to bullies at taxis and on the school yard they are mostly exposed to bullies in bathrooms.

“Learners are usually bullied by members of the same gender. However, racial composition also plays a role in some Free State schools. A grade 12 girl writes, ‘There are boys in my school who act means against black people. When the teacher is out they take a red pen and write on the projector and spray it with spirits. It looks like blood and they would say it is AIDS and my friends and I have it.’

“Educators must take note of bullying in schools and must not shrug it off as unimportant. Principals or educators could be find guilty of negligence. A large number of educator respondents, 88,29%, indicated that they would intervene in cases of verbal bullying and 89,71% would intervene if they saw learners being physically bullied. However, only 19,97% of the learners who were victims of bullying were helped by educators/ other adults from their respective schools.

“The learners’ lack of trust in their educators’ abilities and willingness to assist them in the fight against bullying has important implications for education institutions. The importance of training must be emphasised.

Learners bully their educators to undermine their confidence. In Prof. de Wet’s study on educator-targeted bullying in Free State schools 24,85% of the respondents were physically abused by their learners, 33,44% were the victims of indirect verbal bullying, and 18,1% were at one time or another sexually harassed by their learners. These learner offences may lead to suspension.

“Educators are not only victims of bullying; some of them are the bullies. The South African Council for Educators prohibits bullying by educators. It is worrying that 55,83% of the educators who participated in the research project verbally victimised learners, 50,31% physically assaulted learners and a small percentage was guilty of sexual harassment.

“Every educator and learner in South Africa has the right to life, equal protection and benefit of the law, of dignity, as well as of freedom and security of the person. These rights will only be realised in a bully-free school milieu.

“To oppose bullying a comprehensive anti-bullying programme, collective responsibility and the establishment of a caring culture at schools and in the community is necessary,” said Prof. de Wet.

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