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Bothalia - African Biodiversity & Conservation

On-line version ISSN 2311-9284
Print version ISSN 0006-8241

Bothalia (Online) vol.49 n.1 Pretoria  2019

http://dx.doi.org/10.4102/abc.v49i1.2428 

ORIGINAL RESEARCH

 

Has strategic planning made a difference to amphibian conservation research in South Africa?

 

 

John MeaseyI; Jeanne TarrantII; Alex RebeloI, III; Andrew TurnerIV, V; Louis du PreezII, VI; Mohlamatsane MokhatlaI, VII; Werner ConradieIII, VIII

ICentre for Invasion Biology, Department of Botany and Zoology, Stellenbosch University, Stellenbosch, South Africa
IIUnit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
IIIPort Elizabeth Museum, Humewood, South Africa
IVCapeNature Scientific Services, Stellenbosch, South Africa
VDepartment of Biodiversity and Conservation Biology, University of the Western Cape, Cape Town, South Africa
VISouth African Institute for Aquatic Biodiversity, Grahamstown, South Africa
VIIRondevlei Scientific Services, South African National Parks, Sedgefield, South Africa
VIIISchool of Natural Resource Management, Nelson Mandela University, George, South Africa

Correspondence

 

 


ABSTRACT

BACKGROUND: Conservation relies on the strategic use of resources because monies for conservation action are limited, especially in developing countries. South Africa's Frog Atlas project established a baseline for the country's amphibian data and threat levels in 2004, and in 2009 a prioritisation exercise developed a strategy for conservation research
OBJECTIVES: In this article, we assess this strategy for conservation research
METHOD: We conducted a quantitative and qualitative assessment of research undertaken since the strategy was developed
RESULTS: The strategy has produced a lasting impact on taxonomy, ecological studies, monitoring and capacity building. Publications in all areas have increased, but particularly in conservation ecology. Other indicators are increases in the numbers of locality records for target taxa, species descriptions and postgraduate degrees with amphibians as the principal topic. We document important milestones for South African amphibian conservation, including the first Biodiversity Management Plan for Species (BMP-S) for Hyperolius pickersgilli, a smart device app that uploads locality data to an open access database, 15 years of monitoring data and new amphibian identification books for adults and children. The Red List Index calculated for South African amphibians shows that the country's species are becoming more threatened (a 1% reduction in 10 years), but a hindcasting exercise suggests that most of the damage was already done by 1990. We provide a checklist for 131 amphibian species in South Africa, of which 82 species are endemic
CONCLUSION: A strategy for conservation research was found to greatly augment the focus of research on South African frogs. A new strategy should focus on fewer taxa over meaningful time spans

Keywords: threatened species; Red List Index; Anura; conservation research; strategy.


 

 

Introduction

The importance of prioritising conservation activities stems from the uneven nature of biodiversity, the irregular spread of threats facing that biodiversity and the inequalities between nations' spending on conservation (Brooks et al. 2006). Developing countries in particular have a strong need to prioritise the limited resources to a very small capacity of conservationists, but often with a higher level of biodiversity. South Africa is a mega-biodiverse region with nine biomes and three recognised biodiversity hotspots (Mittermeier et al. 2004). The country has a strong tradition of strategic conservation planning that continues to the present day, including the active participation of academics (see Rouget et al. 2014 for a recent review). This has included the formation of national and provincial nature reserves, as well as newer conservation agreements entered into with private landowners (e.g. Conradie et al. 2013). Despite this, the basis for conservation planning comes primarily from plant diversity data, although amphibians have also been shown to be moderately represented by the country's protected areas (Drinkrow & Cherry 1995; Mokhatla et al. 2012). However, large proportions of amphibian species' distributions are outside formal protected areas, thus not contributing to their persistence. This, in part, has led to the high level of threatened status for South Africa's amphibians, with 12.3% assessed as CR, EN or VU in 2017 (IUCN 2017), and the need to produce a coordinated strategy for their conservation research (Measey 2011).

Amphibians came to the forefront of global vertebrate conservation needs in 1989 at the first World Congress of Herpetology (in Canterbury, UK), when delegates first shared their impressions of declining amphibian populations worldwide (Blaustein & Wake 1990). This prompted the first complete Red List assessment for amphibians, which showed more than a third of species to be declining, and the highest proportion of threatened taxa among all the vertebrate groups (Stuart et al. 2004). In South Africa, the same year saw the culmination of a decade-long project to produce the Atlas and Red Data Book of the Frogs of South African, Lesotho and Swaziland (Minter et al. 2004). The project collated data from museum specimens, new field records from participating herpetologists and dedicated fieldwork from the project herpetologists. The 'Frog Atlas' (as it has come to be known) provided a starting point for the region's herpetological community to assess the species in need of research to further their conservation. Furthermore, it has led directly to many national spatial studies that have used the data (e.g. Botts, Erasmus & Alexander 2011, 2013, 2015; Colville et al. 2014; Mokhatla et al. 2012; Mokhatla, Rödder & Measey 2015; Schreiner, Rödder & Measey 2013). However, action plans made during this process (Harrison et al. 2001) seemed to falter without champions to drive the research forward, and a lack of on-the-ground conservation implementation.

In December 2009, the South African National Biodiversity Institute (SANBI) hosted a workshop to re-assess the Red List status of the country's amphibians, and strategise future conservation research in the region. The workshop was broken up into four subject areas: taxonomy, ecology, monitoring and capacity. In each focal subject area, ranking of species provided a framework for amphibian conservation workers in South Africa on which to base future research. In November 2016, SANBI hosted another Red Listing workshop (this time for all southern African amphibians, including Angola). This allowed participants to engage in a retrospective process on the pros and cons of a research strategy, and specifically to ask: has the strategy for amphibian conservation research in South Africa made a difference?

In this article, we ask whether being strategic has made a quantifiable difference to amphibian conservation research in South Africa. To do this, we review the progress made in the conservation of South African amphibians since the 2009 workshop. We provide both qualitative, through the use of case studies and participants' responses at the 2016 workshop, and quantitative information on publications and point locality data, on the utility of a conservation strategy document, and we critique the methodology used to draw up the prioritisation lists. Lastly, we use the Red Listing data produced at the meetings to produce a Red List Index (RLI) (Bubb et al. 2009) for South African amphibians.

 

Methods and materials

Strategy workshop in 2009

The methods used to draw up priority listings were done in the 2009 workshop, and are described by Measey and Tolley (2011a). In summary, conservation research was divided into four main research areas: taxonomy, ecology, monitoring and capacity. Within each of these areas, distinct sub-topics were identified and for each sub-topic each species was given a score of 1-5, as follows: 1 - The available information is sufficient. No priority for further work; 2 - There is limited information, but no priority is assigned; 3 - There are questions, but the priority is low; 4 - Definite questions exist, and a high priority is assigned; 5 - There is an urgent need for immediate work, and the highest priority is assigned. The scores were then summed across all sub-topics to provide a final priority score for each species, together with a list of exactly what should be done. Summed scores were ranked with the species receiving the highest score as the highest priority species. Species that tied on scores were given equal ranks.

Strategy workshop in 2015

We compared the results of the 2009 prioritisation exercise (Measey 2011) with the achievements made in amphibian conservation research in South Africa. In the qualitative assessment, we considered how the prioritisation exercise had helped in the facilitation of working on conservation of amphibians in South Africa. During the 2015 workshop, participants were encouraged to comment on the efficacy of the strategy following a presentation. Particular emphasis was placed on the ability to leverage funding. We chose to demonstrate how the strategy made tangible differences to research through a series of case studies (Boxes 1 to 4), one for each main research area.

The quantitative exercise was conducted using quantities of peer-reviewed scientific papers appearing in Web of Science (www.webofknowledge.com). Two searches were made that encompassed two equivalent time periods prior to and after the December 2009 workshop: 2000-2009 and 2010-2018. For each of these periods, a search was made with the following syntax: TOPIC: 'frog' OR 'anura' OR amphibia* AND ADDRESS: 'South Africa'. The results were first sorted into whether or not the titles showed the publications were focussed on extant amphibians, with those being not applicable being discarded. Next, each paper was sorted into one of the four subject areas covered in Measey (2011), and four additional subject areas that presented themselves during the scoring: disease, parasites, invasions and toxicology. Next, each paper was assessed to determine whether it covered taxa that were prioritised in the 2009 Workshop (see above).

Red List Index for South African amphibians

The RLI is used as a measure of health for a group of taxa in a specified region (Bubb et al. 2009; Butchart et al. 2007). South Africa is the only country to date to produce such an index for its biodiversity, and this is particularly relevant as far as amphibians are concerned with the three consecutive assessments available for comparison. The RLI uses the change in status for each taxon listed in the IUCN Red List at set time periods in a prescribed formula:

where Wc(t,s) is the category c for each amphibian species s at time t, WEX is for Extinct taxa (none in South Africa) and N is the total number of species assessed (excluding Data Deficient).

The RLI can only be used with taxa that were assessed on all dates, representing 87% of extant South African amphibian taxa. The remaining 13% were not assessed as they had not been described or have changed taxonomic designation between Red Listings. We distinguish between assessments that resulted from non-genuine change (either because of improved knowledge of the species [8%], or because of taxonomic adjustments [1%]) and those with genuine changes. Non-genuine changes are not included in the RLI.

In a separate exercise, we backcast the status of the 131 extant amphibian species to 1990 using the 1990 national land cover data set (GeoTerraImage 2016), and compared this with the 2017 Red List status. For each species assessed as threatened in 2017, we plotted occurrence records that pre-dated 2000 and current IUCN polygons to determine whether any distributions seemed to have shrunk in the past 17 years. Botts et al. (2013) recorded a number of South African amphibians that seemed to have changed their distribution between two time periods: pre-1996 and 1996-2003. We carefully checked all species that Botts et al. (2013) reported to have changed in distribution, and determined whether reported changes were genuine using new data since 2003. We used land transformation images from 1990 and 2013 (GeoTerraImage 2015) to remove all disturbed areas inside polygons of currently threatened taxa. We examined the changes in transformation for each species and assessed whether any IUCN criteria may have changed between 1990 and 2017. We paid special attention to any likely changes in area of occupancy and/or fragmentation as appropriate for current threatened criteria in each species. We then used our expert knowledge to assess whether there was likely to have been a change in the Red List (using IUCN v3.1) status given changes in the above criteria in 1990. The RLI for all South African amphibians was calculated according to Bubb et al. (2009; see equation 1).

 

Results and discussion

Overall, participants were generally positive about the influence of the strategy for conservation research (Measey 2011) on their work. Participants acknowledged that there was a certain level of self-serving in the process that had seen them prioritise species that they were active with in 2009 and had subsequently continued to work with over the subsequent seven years. Despite this, the ranking system used shows no obvious bias, with several species ranked #1 (in taxonomy, monitoring and capacity) receiving no publications. There has also been a net increase in the amount of material published on South African amphibians, and in particular towards species that were prioritised in the 2009 strategy document (Table 1).

Taxonomy: Understanding and documenting species diversity

Ten priorities were listed that included 39 species (because of equal rankings). Of these, only seven had received publications that improved their taxonomy by 2018. The highest ranking was Capensibufo rosei (at #3) that had been recognised as a species complex with three new species described (see Box 1). The lowest ranking was Arthroleptella landdrosia (#6) from which Arthroleptella kogelbergensis was described by Turner and Channing (2017). Other, non-prioritised, taxa were also described since the workshop, including Cacosternum thorini (see Conradie 2014), Breviceps passmorei and B. carruthersi (see Minter, Netherlands & Du Preez 2017). Most recently, a previously synonymised species, Arthroleptis wageri, has been resurrected on the basis of molecular evidence (Tolley et al. 2018). Overall, since the 2009 workshop, the number of species in South Africa has grown by 17 (between 2012 and 2018; Figure 1). This represents a 14% increase, and a major achievement commensurate with the global rate of new amphibian descriptions. In comparison, Köhler et al. (2005) recorded a 26.3% increase in global descriptions in nearly twice the period (11 years).

 

 

Participants in 2016 felt that too many taxonomic issues had been prioritised to be fulfilled in a five-year window. Secondly, that species did not make a good starting point for these priorities, and instead these should be genera, with an emphasis being placed on initial phylogenies that attempt to cover the entire distribution as a basis for subsequent taxonomic works. Lastly, the capacity for amphibian taxonomy is low, with 14 out of 17 species in the last six years being described by Alan Channing (Channing 2012; Channing & Baptista 2013; Channing et al. 2013, 2017; Turner & Channing 2017). Only three participants (Channing, Conradie and Minter) currently have the capacity to undertake taxonomic descriptions, and Minter retired in 2010 while Channing retired in 2013 (although his taxonomic works have grown since this time). However, more researchers undertake phylogenies encompassing South African species, including those not based in South Africa. It is noteworthy that South African authors were contributing half of their publications to the taxonomy of species outside of South Africa (mostly on the African continent: Table 1), with only a quarter of taxonomic publications covering species prioritised in 2009.

As demonstrated with the work on C. rosei (Box 1), the starting point for this taxonomic work was a phylogeny, which gave good indication that there were cryptic species. This has been the basis for other work describing new species in the genus Cacosternum (Channing et al. 2013) and Arthroleptella (Turner & Channing 2017). Participants agreed that phylogenies of genera or larger groups were a good starting point for outstanding taxonomic issues, and agreed that these groups, rather than species, should be targeted in future. For example, the recent phylogeny of the genus Breviceps indicates a number of taxa that are in need of taxonomic descriptions, and will substantially increase the diversity of this group in South Africa (Nielsen et al. 2018).

Because of the extensive taxonomic revisions in the region over the last 10 years, we take this opportunity to publish a full list of South African amphibian species as an online appendix to this article (https://doi.org/10.6084/m9.figshare.9713978), which will be kept updated as an ongoing list of South African amphibians.

Conservation and ecological studies

The 2009 prioritisation exercise listed 16 species of South African anurans that qualified for one of four levels of priority for conservation and ecological studies.

The most basic information needed in understanding most amphibian species in South Africa is an increase in the knowledge of their distribution. The number of new locality points is especially large for species that have received a lot of attention. The Western Leopard Toad, Sclerophrys pantherina, has been the subject of a powerful Citizen Science campaign that has helped to document its distribution in detail (Figure 2a). This species lends itself to this type of data collection as it is a charismatic and easily observed species within an urban area (Measey, Dorse & Faraday 2012). The Kloof Frog, Natalobatrachus bonebergi, is monitored regularly by volunteer groups, allowing additional localities to be registered (Figure 2b; Table 2). Lastly, the Knysna Leaf-folding Frog, Afrixalus knysnae, is the subject of a student project that aims to document all extant localities in the range (Figure 2c). Most of the species prioritised in 2009 show a similar trend to these examples.

 

Table 2a

 

 

Table 2b

 

Although not immediately obvious in the data, this period also saw the important rediscovery of Vandijkophrynus amatolicus (see Tarrant & Cunningham 2011). In 2009, there was concern that this species was possibly extinct (Conradie & Tarrant 2011), but following dedicated annual searches, including through the use of a predictive ecological niche model based on habitat suitability, and a project, nine new records exist in the current period, which is a doubling of those found during the Frog Atlas. The species remains, however, Critically Endangered because of its extremely restricted range, ongoing threats and no formal protection within its range.

The period has also seen 48 articles being published on subjects touching on the conservation and ecology of South African frogs, including 25 on taxa that were prioritised in 2009. Noteworthy are the important insights into the life history and conservation of C. rosei on the Cape Peninsula (Becker et al. 2018; Cressey, Measey & Tolley 2015; Da Silva et al. 2016; Da Silva & Tolley 2018; Edwards, Tolley & Measey 2017), which was listed with the highest priority (Measey, Minter & Turner 2011), seven publications on Xenopus gilli, listed at priority level 4 (Conlon et al. 2015; De Villiers et al. 2016; Fogell, Tolley & Measey 2013; Furman et al. 2017; Measey & De Villiers 2011; Thorp, Vonesh & Measey 2019; Vogt et al. 2017), as well as publications on Hyperolius pickersgilli (see Tarrant & Armstrong 2013) and S. pantherina (see Da Silva et al. 2017; Measey & Tolley 2011b).

The strategy document highlighted the possibility of using Biodiversity Management Plans for Species (BMP-S) as a means of bringing together large numbers of stakeholders into an agreed conservation framework (NEMBA 2009). The announcement in 2017 that a BMP-S had been promulgated for H. pickersgilli (see Armstrong & Tarrant 2017) is especially important for the long-term conservation of this species, and the first of its kind in South Africa (see Box 2).

While BMP-S are one solution for large numbers of stakeholders, other species are better handled with action plans that involve fewer stakeholders. This is the approach being taken with the Critically Endangered Table Mountain Ghost Frog, Heleophryne rosei, which has now been granted Table Mountain Fund funding for a project to carry out priorities outlined in an action plan over the coming five years.

Despite the great success in terms of locality records, conservation policy and publications, it was felt by the participants that five years was too short a time frame for most ecological studies. The publications that exist are not representative of all the studies that have taken place during the period as many studies are not yet finished. Secondly, like the need for a better focus in taxonomy, the participants felt that a shorter list of priority species would be better served by the academic community.

Assessing status and trends

The 2009 exercise listed 20 South African amphibian species across ten priority approaches that required monitoring. In the ten years following this meeting, two new species have been added to the list of monitored species (Table 2). However, three are not monitored at all, and two have not been maintained on an annual basis, and this is cause for concern. Monitoring takes place using very different methodologies in different areas, but many monitoring exercises are plagued by methodological inconsistencies and especially the lack of repeated measures that would allow for estimation of variance together with the estimate of quantity. However, new methodologies for monitoring are becoming available, especially through recording of calling individuals using microphone arrays (see Box 3).

The strategic importance of monitoring methodology is important when considering the cost of acquiring long-term data sets. For example, larvae of H. rosei are monitored annually by counting tadpoles within a 10 m stretch of set streams coming off Table Mountain. However, the stochastic fluctuations in the data gained from this monitoring make it of little use other than to gauge presence or absence in each stream. The need for an improved methodology was recognised in the 2016 meeting, and a focus group is now working towards an action plan for the species that will involve quantitative estimates of larval abundance through capture-mark-recapture (CMR) protocols, which are particularly strong for quantitative monitoring protocols. Becker et al. (2018) used CMR data on C. rosei to determine some unusual life history parameters of this species. Even though this monitoring exercise only involved a yearly batch mark, the authors were able to discover an inverse relationship between breeding period rainfall and survival. De Villiers and Measey (2017) also used CMR on the overland dispersal of Xenopus laevis over two years in a population in Kleinmond.

Although not present in the strategy document, some studies of genetic monitoring have appeared (Da Silva & Tolley 2018; Furman et al. 2017) where tissue samples stored over time have been made use of. These publications provide important information about the long-term genetic health of populations, and demonstrate the importance of facilities that curate and maintain genetic samples.

Success of monitoring can really only be gauged on a long-term basis, and so we assembled a list of amphibian species that are currently monitored in South Africa together with the methodologies (Table 2). Many species do not have consistently complete data sets and rely on individuals rather than institutions. Both Ezemvelo KwaZulu-Natal Wildlife and CapeNature have embraced amphibian monitoring at an institutional level (see Box 3), but it is important that methodology is improved to deliver quantitative repeatable measures.

While monitoring is needed to assess population trends, some anuran species still lack basic distribution data. These species may be scarce during non-breeding conditions (e.g. Cacosternum capense), recently described (e.g. Cacosternum nanogularum) or simply be far away from professional herpetologists (e.g. Strongylopus springbokensis) and may require dedicated surveys in these areas or targeted searches during the breeding season, as is being done for H. pickersgilli, Leptopelis xenodactylus and A. knysnae.

Education, awareness and capacity building

The 2009 assessment highlighted the acute shortage of capacity in South Africa's institutional and academic amphibian conservationists. At the time, South Africa had 14 people employed and working at least part time on amphibian conservation (Tolley et al. 2011). Today, this has reduced to nine, mostly as a result of retirement and a lack of replacement with amphibian-focussed workers (see Table 3).

Although the situation looks bleak, there have been a considerable number of postgraduate students who have conducted their MSc or PhD studies on amphibians (Table 4).

 

 

Publishing has seen great advances with another edition of the popular field guide (Du Preez & Carruthers 2017), a revision of the popular Frogs and Frogging (Carruthers & Du Preez 2011a), the release of Afrikaans version Paddas and Paddajolyt (Carruthers & Du Preez 2011b), the first field guide in an ethnic African language, namely, A Bilingual Field Guide to the Frogs of Zululand (Phaka et al. 2017), a guide to the tadpoles of Africa (Channing, Rödel & Channing 2012), the publication of a book for children My First Book of South African Frogs (Tarrant 2015), including a smart device application, and a field guide to the amphibians of Africa (Channing & Rödel 2019).

The view of amphibians in South Africa is extremely varied (Tarrant, Kruger & Du Preez 2016), and popular publications are perhaps the most important contribution to capacity building in South Africa as they will help contribute to Citizen Science, and the latter to future Citizen Scientists as well as potential students and career herpetologists. Of particular note is the publishing of an app version of Du Preez and Carruthers (2017) that can be installed on cell phones or tablets, and thus is portable for the field (see Box 4). Similarly, other initiatives such as iNaturalist (https://www.inaturalist.org/places/south-africa) that took on all data from iSpot in 2017 and the Animal Demography Unit's FrogMap (http://vmus.adu.org.za/) have accumulated over 6500 observations. These projects are clearly important contributions to amphibian distribution data, and have the support of the professional amphibian community. Indeed, the addition of these data made an important contribution to the 2016 Red List re-assessment. However, the data have the same types of bias found in the Frog Atlas data (Botts et al. 2011), and provided little input on species that had no active work on them. Thus, at least in South Africa, this kind of Citizen Science will not replace dedicated and targeted fieldwork on amphibians.

Red List Index for South African amphibians

The RLI for 1990 was 0.9017, higher than during any IUCN assessment, while in 2017 it was 0.8917, a reduction of 1% in RLI. The change in RLI was attributed to the deteriorating of Red List status of six endemic frogs, all through habitat loss and degradation (Table 5). It is noteworthy that there has been no amelioration of threatened status for any species within this period.

 

 

While gross changes in published assessments (Table 5: RLI*) appear to have an improving index, this is because of non-genuine changes in assessments either because of improved knowledge of the species (8%), or because of taxonomic adjustments (1%). Once these non-genuine changes have been removed, the analysis shows a small decline in the RLI over time. This is because between 2009 and 2015 the genuine change in status for Amietia hymenopus moved from Least Concern (LC) to Near Threatened (NT). The change in status of this high altitude species was justified by observations of threats from chytrid infections, die-offs of tadpoles from drying of streams and severe freezing in winter, which may be associated with climate change.

Our analysis suggests that most threats to populations of South African frogs happened prior to 1990 (Table 6). However, change in habitat status between 1990 and 2004 did result in significant losses for species in the Western Cape, Eastern Cape and KwaZulu-Natal (Jewitt 2012) provinces - areas that also encapsulate the highest diversity and numbers of endemic frogs in South Africa (Poynton 1964; Schreiner et al. 2013).

 

 

Conclusion

Should we continue to prioritise amphibian conservation research in South Africa?

Our results suggest that the prioritisation of conservation research was a great success in terms of increased taxonomic understanding, generating distribution data, research publications, number of graduating students and improved public awareness. Although we used a scoring process to rank priorities, we did not find that species that had received a higher priority ranking were more likely to receive research attention. This could be not only because participants already had research projects on certain taxa, but also because many of the taxa were related to the distribution of herpetologists and the ease of conducting fieldwork.

This then raises the question of what should happen to species that received a high priority, but where no research has actually been conducted? For taxonomy, there is a level at which, excluding major revisions, species groups can be removed from the priority list. For conservation and monitoring, we feel that the original list still has validity, but that all lists could and should be shorter to reflect the reality of a very small capacity in South Africa for conducting conservation research.

South Africa has two areas of frog endemicity (Poynton 1964) that correspond to two clear areas of activity in conservation research: KwaZulu-Natal and the Western Cape provinces. Priorities continue to exist outside of these areas, but with a severely limited capacity to conduct research. The Northern Cape province has several species of conservation importance, but without any current capacity to carry out conservation research. This is certainly worrying, but our best hope is to continue to train and graduate students who have a focus on amphibian conservation, motivate for improved funding support for amphibian conservation from both national and international sources, and to educate and sensitise the general public to the need for frog conservation in South Africa.

A new strategy for conservation research will be formulated at a workshop in 2019. Lessons learned from the 2009 strategy will be carried forward. We plan to prioritise fewer target taxa, emphasise the potential for Citizen Science input and continue to explore ways of building capacity for conservation research on South Africa's amphibians.

 

Acknowledgements

The authors would like to thank Francois Becker, Marius Burger, Alan Channing, James Harvey, Les Minter, Domatilla Raimondo, Krystal Tolley and Atherton de Villiers who all made helpful comments on a previous version of this article. J.M., A.R. and M.M. would like to thank the DST-NRF Centre of Excellence for Invasion Biology for support.

Competing interests

The authors declare that they have no financial or personal relationships that may have inappropriately influenced them in writing this article.

Authors' contributions

J.M., J.T., A.T. and L.D.P. wrote the boxes. J.M., J.T., A.T. and M.M. conducted the Red List Index for South African amphibians. W.C. and A.R. had oversight of the distribution data and taxonomy. J.M. drafted the article. All authors attended the workshop and reviewed versions of the article.

Ethical considerations

No ethical clearance was required for this study. This article followed all ethical standards for research without direct contact with human or animal subjects.

Funding

Both workshops were carried out with support from SANBI (NORAD).

Data availability statement

Data sharing is not applicable to this article as no new data were created or analysed in this study.

Disclaimer

The views and opinions expressed in this article are those of the authors and do not necessarily reflect the official policy or position of any affiliated agency of the authors.

 

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Correspondence:
John Measey
jmeasey@sun.ac.za

Received: 11 Dec. 2018
Accepted: 14 Mar. 2019
Published: 25 Sept. 2019

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