Southern Africa Research Articles

The Southern African Heat Low: Structure, Seasonal and Diurnal Variability, and Climatological Trends

Abstract Heat lows are key features of subtropical climates and monsoon systems. In southern Africa, they are pivotal to understanding divergent climate change projections, in particular the veracity of future rainfall decline. Compared to other heat lows, including in West Africa and Australia, the southern African heat low remains poorly documented. Here, we analyze the diurnal cycle, seasonal variability, and trends of the heat low in reanalysis data. In ERA5, 462 strong heat low days are detected between September and March from 1990 to 2019, equating to 7.3% of days sampled. These events feature ascent (exceeding −0.2 Pa s−1) at low levels (strongest between 800 and 600 hPa) and subsidence aloft, generating low-level cyclonic flow with anticyclonic flow above. This flow exhibits strong diurnal variability, with peak windspeeds between 0600 and 0900 UTC and maximum ascent at ∼2300 UTC. Heat lows form preferentially over Angola in September (∼14°S) and October (15°–20°S), and in Namibia from November to March (∼20°–26°S). Strongest ascent occurs over areas of high elevation. Finally, we show a rapidly increasing frequency of strong heat low days, with a 175% increase between 1960–89 and 1990–2019. The greatest increase (459%) has occurred in the early summer months of September and October, consistent with projections of delayed rainfall onset. Strikingly, more strong heat lows are detected in the most recent 5 years of analysis (2014–19) than in the 30-yr period from 1960 to 1989. These results suggest the heat low is an important feature in determining drying trends over southern Africa and is a vital indicator of climate model accuracy. Significance Statement This work documents the heat low that forms in southern Africa in the lowest levels of the atmosphere. The feature is present during austral summer (from September to March) and is associated with below average rainfall across much of the subcontinent. The frequency of strong heat lows has rapidly increased in line with regional amplified warming trends. The heat low is identified as an important control on circulation and precipitation patterns and changes in the frequency or intensity of the feature in the future are likely to influence the strength of declining rainfall trends across southern Africa.

Phenotypic Characterization of Citron Watermelon (Citrullus lanatus var. citroides) Genotypes for Bioenergy Production

Citron watermelon (Citrullus lanatus var. citroides) is an important climate smart crop, characterized by high oil content in the seeds and it is a popular fruit in southern Africa. To determine best performing genotypes eight phenotypic traits were assessed to identify cultivars with potential for biodiesel production. A field experiment was conducted at Sebele Agricultural Research Station, in Southern Botswana, during 2019 to 2020 cropping season. Four (4) melon genotypes were planted in a Randomized Complete Block Design replicated three times and eight (8) characters were assessed. Except seed oil content (26.6%) there was significant (P < 0.05) difference among all the traits, an indication of higher genetic diversity in the selected citron watermelon. SC1-Sesoswane, exhibited highest seed yield (1540 kg/ha) and oil yield (435.03 kg/ha) while MMB-280-Lerotse recorded lowest seed yield and oil yield of 548.1 kg/ha and 144 kg/ha respectively. There was a significant correlation of (0.9) between oil yield (kg/ha), number of fruits produced, and seed yield (kg/ha), an indication that increasing the seed yield will positively increase the amount of oil produced. This study revealed the potential bioenergy production of the four cultivars. However, SC1-Sesoswane appears a more promising alternative cultivar for feedstock for biodiesel production.

Phylogeny and reclassification of Lampranthus (Ruschieae, Aizoaceae) in southern Africa

AbstractLampranthus consists of 85 species of succulent perennials which are all endemic to southern Africa. Most of its species are restricted to fynbos and regenerate in large numbers after fires. We use nine chloroplast markers to generate a phylogeny with a dense sampling of Lampranthus and some taxa which may be closely related to it. While we found that most of the species belong to one strongly supported “core” clade, we also found three minor clades of Lampranthus that fall outside this core. For Lampranthus we set up a new classification of three subgenera. The clades forming L. subg. Adunci (3 spp.) and subg. Calcarati (1 sp.) are unresolved within the Ruschieae and we treat them as subgenera until their relationships are clarified. Three sections are proposed for L. subg. Lampranthus and we also suggest new synonymy for several species in L. sect. Lampranthus (65 spp.) and sect. Blandi (15 spp.). Roosia and the type species for Esterhuysenia are nested in L. sect. Blandi and so these genera are subsumed under Lampranthus. Esterhuysenia stokoei forms part of Lampranthus and is the sole member of a new section within L. subg. Lampranthus. The two larger sections of L. subg. Lampranthus show different evolutionary trends and distributions: Lampranthus sect. Lampranthus contains more species, they are mostly in the winter rainfall region of the Western Cape and they have a greater range of floral shapes and colours. Lampranthus sect. Blandi contains a single species in the Kamiesberg, in the Northern Cape, while most of its species occur along the southern coast of southern Africa eastwards to southern Natal. These species are florally less diverse. Two species of Lampranthus are moved to a new genus, Malephoropsis gen. nov. These are unrelated to the rest of Lampranthus and they fall among species of Malephora, Disphyma and Gibbaeum with which they share softly corky branches, mesomorphic leaves and only slightly woody fruits with false septa. Several species, which were at one stage included in Lampranthus, are re‐instated in Ruschia; for four others, previously transferred out of Lampranthus to Esterhuysenia or Oscularia, but which cannot be accommodated into any of the existing genera, we propose a new genus, Sederbergia gen. nov. Lastly, we consider three monotypic genera which were sequenced here for the first time: Circandra is re‐instated in Erepsia; Malotigena is transferred to Delosperma subg. Proterogyna; the relationships of Daggodora remain unresolved.

Towards Institutionalization of One Health in Eastern and Southern Africa

Towards Institutionalization of One Health in Eastern and Southern Africa

The Quadrangular Cartilage in Rhinoplasty: A Surgically Focused CT Dimensional Analysis of Black African and Caucasian Populations.

The apparent lack of quadrangular cartilage in Black African noses is commonly observed both from a radiological and clinical point of view. To the best of our knowledge, only a few research papers have been conducted on the facial proportions and structural anatomy of black people of Southern and Eastern Africa. The aim of this retrospective comparative study is a radiological assessment of the total amount of septal quadrangular cartilage by measuring its area in sagittal CT views, in two selected Black South African and Caucasian (CA) samples and the comparison with the literature in our hands. Statistical analysis was conducted, categorical variables are shown as frequencies and percentages, while continuous variables as means and standard deviations. Normal distribution of variables was verified using the Shapiro-Wilk test or by means of skewness and kurtosis values. Differences among unpaired groups were evaluated using the independent Student's t-test for normally distributed data (complemented by the Cohen's d to show the effect size with the following cutoff: d = 0.2, "small" effect size; d = 0.5, "medium" effect size; d = 0.8, "large" effect size) and Mann-Whitney U test in case of non-normal distribution. Statistical significance was defined as p < 0.05 setting the α-error probability at 5%. This study shows that, on average, there is 30% more cartilage available in CA compared with Black African noses and confirms the apparent lack of quadrangular cartilage and in Black African noses which is commonly observed in surgery. The need for an adequate amount of autologous septal cartilage makes cartilage availability a major concern before surgery and being able to preoperative accurately measure the amount of septal cartilage that is available to be harvested for other grafts in the surgery is essential.

Livelihood Trajectories of Rural Young People in Southern Africa: Stuck in Loops?

ABSTRACTAttempts to boost rural development in the Global South tend to focus on ways in which people can transform their lives. Interventions are often designed to help overcome specific envisioned constraints and push individuals onto a pathway out of poverty. Research has contributed to nuancing this vision by documenting the non‐linearity of pathways, which often results in people being left in limbo or stuck, rather than moving forward. Based on a study in two villages in Malawi and Lesotho, this article argues that even these nuances do not fully capture the real‐life experiences of the 63 young people who participated. Interviews tracing the course of their lives between 2007–08 and 2016–17 reveal trajectories that are circular rather than linear, and show the detrimental effects of being stuck in these frustrating loops of taking action without progressing. Conceptualizing rural young people's livelihood trajectories in contexts of severe poverty as loops highlights the structural issues that need to be addressed if their lives are to be transformed. Understanding development as emancipation from sources of unfreedom means focusing on the structural constraints that keep some people in poverty, and the importance of attaining agency if they are to put their needs on the agenda and demand basic rights.

Making a U-turn on the Purfleet Interchange: Stone Tool Technology in Marine Isotope Stage 9 Britain and the Emergence of the Middle Palaeolithic in Europe

This paper re-examines earlier Palaeolithic core technology from British sites assigned to MIS 11, 9, and 7 using primarily a châine opératoire approach, with the objective of better understanding the earliest occurrence and distribution of Levallois and other prepared-core technologies across the Old World. Contrary to previous interpretations (White and Ashton in Current Anthropology, 44: 598–609, 2003), we find no evidence for a true Levallois concept in MIS 11 or MIS 9 in Britain. Cores previously described as ‘simple prepared cores’ or ‘proto-Levallois’ cores show neither evidence of core management nor predetermination of the resulting flakes. They can instead be explained as the coincidental result of a simpler technological scheme aimed at exploiting the largest surface area of a core, thereby maximising the size of the flakes produced from it. This may be a more widespread practice, or a local solution derived from existing principles. Levallois appears fully formed in Britain during terminal MIS 8/initial MIS 7. Consequently, Britain does not provide evidence for an in situ evolution of Levallois, rather we argue it was introduced by new settlers after a glacial abandonment: the solution to the emergence and significance of Levallois lies in southern Europe, the Levant and Africa.

Hybridisation as a Normal Process of Life: A Contribution to the “Ukuthwasa” Conversation within the Methodist Church of Southern Africa

The Methodist Church of Southern Africa (MCSA) is currently engaged in a conversation on ukuthwasa (initiation into an ancestral calling). The conversation has sparked different reactions within the Church. Some are uncomfortable engaging in this conversation as it is seen as an unnecessary and unChristian conversation to have within the Church. There are also some who have gone through the ukuthwasa and feel that the conversation is long overdue within the MCSA. Furthermore, some believe in sangomas and are happy about this conversation. While this conversation is taking place within the MCSA, it is shrouded in suspicion and fear. There is fear that it might lead to the conversion of the Church to African traditional religion, which many feel is the opposite of Christianity. This paper is intended as a contribution to this conversation by using secondary or desk research as a methodology. Firstly, the paper defines the African worldview in which ukuthwasa is embedded. Secondly, it explores the meaning of hybridisation. Thirdly, it indicates areas within the Christian faith where hybridisation has become part of worship and belief. Finally, the paper concludes by recommending openness in this conversation as a likely solution that could lead to the Methodist vision of a “Christ healed Africa for the healing of nations.”

Feral frogs, native newts, and chemical cues: identifying threats from and management opportunities for invasive African Clawed Frogs in Washington state.

Invasive species threaten biodiversity globally. Amphibians are one of the most threatened vertebrate taxa and are particularly sensitive to invasive species, including other amphibians. African clawed frogs (Xenopus laevis) are native to Southern Africa but have subsequently become invasive on multiple continents-including multiple parts of North America-due to releases from the pet and biomedical trades. Despite their prevalence as a global invader, the impact of X. laevis remains understudied. This includes the Pacific Northwest of the USA, which now hosts multiple expanding X. laevis populations. For many amphibians, chemical cues communicate important information, including the presence of predators. Here, we tested the role chemical cues may play in mediating interactions between feral X. laevis and native amphibians in the Pacific Northwest. We tested whether native red-legged frog (Rana aurora) tadpoles display an antipredator response to non-native frog (X. laevis) or native newt (rough-skinned newts, Taricha granulosa) predator chemical stimuli. We found that R. aurora tadpoles exhibited pronounced anti-predator responses when exposed to chemical cues from T. granulosa but did not display anti-predator response to invasive X. laevis chemical cues. We also began experimentally testing whether T. granulosa-which produce a powerful neurotoxin tetrodotoxin (TTX)-may elicit an anti-predator response in X. laevis, that could serve to deter co-occupation. However, our short-duration experiments found that X. laevis were attracted to newt chemical stimuli rather than deterred. Our findings show that X. laevis likely poses a threat to native amphibians, and that these native species may also be particularly vulnerable to this invasive predator, compared to native predators, because toxic native newts may not limit X. laevis invasions. Our research provides some of the first indications that native Pacific Northwest species may be threatened by feral X. laevis and provides a foundation for future experiments testing potential management techniques for X. laevis.

A new, apparently lotic species of Relictorygmus from the Northern Cape Kamiesberg, South Africa (Coleoptera, Hydrophilidae, Cylominae)

Relictorygmus Seidel, Minoshima, Arriaga-Varela &amp; Fikáček, 2018, the only known African genus of the hydrophilid subfamily Cylominae, currently includes two lentic species from the far southwestern Cape of South Africa. Here Relictorygmus riparius sp. nov. is described, based on specimens collected from wet moss beside a small mountain stream in the Kamiesberg, Northern Cape Province, South Africa, almost 500 km from previously known taxa and the first lotic member of the genus. The new species is compared with the two previously described Relictorygmus, R. trevornoahi Seidel, Minoshima, Arriaga-Varela &amp; Fikáček, 2018 and R. repentinus (Hebauer, 2002) and notes are provided on its ecology at the type locality. This unexpected find suggests that other cylomines may remain undetected in southern Africa, particularly since they can easily be mistaken for species of the morphologically similar, but distantly related, Coelostoma Brullé, 1835.

Patterned, plain, and in-between: An assessment of ecogeographic divergence between colour pattern morphs of the common egg-eater Dasypeltis scabra

ABSTRACT Intraspecific variation in colour patterns may reflect adaptive responses to local environmental regimes that favour selection of different trade-offs between visual communication, thermoregulation, and anti-predatory functions. Understanding the drivers of colour pattern variation within species can therefore provide valuable insights about adaptation. However, the ecogeographic correlates, and thus the ecological drivers, associated with the segregation of different colour morphs for most reptile species, including snakes, are not well known. Here, we examined differences in environmental niches associated with occurrence records of preserved museum specimens and georeferenced photographic images of common egg-eaters (Dasypeltis scabra) to characterise ecogeographic divergence between typically patterned, patternless, and faintly marked individuals. We gathered 1707 records that we assigned as either patterned, plain, or intermediate morphs. Most records were of patterned individuals, which were widely distributed in southern Africa. Climate niches differed between morphs as plain and intermediate snakes were restricted to high-elevation areas in the Highveld grasslands of South Africa, and woodland-dominated areas in the central and eastern parts of both Zambia and Zimbabwe, but there were no areas where only plain or intermediate snakes occurred in isolation from patterned snakes. Environmental niche modelling predicted minimal areas suitable for co-habitation of colour morphs. We speculate that plain or weakly-marked colour patterns likely developed as an adaptation to increase camouflage ability in open areas in grassland and certain woodland habitats.

Genotypic spectrum of albinism in Mali.

Albinism is a phenotypically and genetically heterogeneous condition characterized by a variable degree of hypopigmentation and by ocular features leading to reduced visual acuity. Whereas numerous genotypic studies have been conducted throughout the world, very little is known about the genotypic spectrum of albinism in Africa and especially in sub-Saharan Western Africa. Here we report the analysis of all known albinism genes in a series a 23 patients originating from Mali. Four were diagnosed with OCA 1 (oculocutaneous albinism type 1), 17 with OCA 2, and two with OCA 4. OCA2 variant NM_000275.3:c.819_822delinsGGTC was most frequently encountered. Four novel variants were identified (two in TYR, two in OCA2). A deep intronic variant was found to alter splicing of the OCA2 RNA by inclusion of a pseudo exon. Of note, the OCA2 exon 7 deletion commonly found in eastern, central, and southern Africa was absent from this series. African patients with OCA 1 and OCA 4 had only been reported twice and once, respectively, in previous publications. This study constitutes the first report of the genotypic spectrum of albinism in a western sub-Saharan country.

Transboundary COVID-19 response on health communication in Botswana, South Africa and Zimbabwe

A global COVID-19 pandemic caused untold community disruptions, a huge toll on lives and placed major burdens on the economies of developing countries. It spread worldwide within a short period of time before nations could mobilise evidence for the best responses. Communities in Botswana, South Africa and Zimbabwe were heavily disrupted. This article focuses on exploring the transboundary differences in COVID-19 responses, plus the implications for improving the health communication strategies in a pandemic age. Health practitioners and governments were ill-prepared to inform the general public about the pandemic and enforced complete shutdowns of economic and social activities. With the COVID-19 pandemic ravaging communities, there was a dearth of focused health communication on COVID-19’s end. New tools of communication and dissemination of information were embraced in the southern Africa country-specific cases. For example, content on precautionary lifestyles, individual or personal responsibility and utilisation of community health workers in the pandemic era was prioritised to prevent or minimise infections and avoid recurrence of the disease. New communication methods were important for addressing uncertainty and can be applied for any future pandemic. This health communication topic addresses the neglected, but important gap on the efficacy of processes towards better health communication strategies. The transdisciplinary methods include improved health communication strategies informed by the experiences of three Southern African Development Community countries. While such measures to arrest COVID-19 proved plausible, these countries’ projections for the future are a concern, suggesting an urgent need to enhance and strengthen health communication in southern Africa.Transdisciplinary contribution: This is a transdisciplinary exploration of health communication and its implications for COVID-19 and future pandemic responses in Botswana, South Africa and Zimbabwe.

Examining the feasibility of assisted index case testing for HIV case-finding: a qualitative analysis of barriers and facilitators to implementation in Malawi

BackgroundAssisted index case testing (ICT), in which health care workers take an active role in referring at-risk contacts of people living with HIV for HIV testing services, has been widely recognized as an evidence-based intervention with high potential to increase status awareness in people living with HIV. While the available evidence from eastern and southern Africa suggests that assisted ICT can be an effective, efficient, cost-effective, acceptable, and low-risk strategy to implement in the region, it reveals that feasibility barriers to implementation exist. This study aims to inform the design of implementation strategies to mitigate these feasibility barriers by examining “assisting” health care workers’ experiences of how barriers manifest throughout the assisted ICT process, as well as their perceptions of potential opportunities to facilitate feasibility.MethodsIn-depth interviews were conducted with 26 lay health care workers delivering assisted ICT in Malawian health facilities. Interviews explored health care workers’ experiences counseling index clients and tracing these clients’ contacts, aiming to inform development of a blended learning implementation package. Transcripts were inductively analyzed using Dedoose coding software to identify and describe key factors influencing feasibility of assisted ICT. Analysis included multiple rounds of coding and iteration with the data collection team.ResultsParticipants reported a variety of barriers to feasibility of assisted index case testing implementation, including sensitivities around discussing ICT with clients, privacy concerns, limited time for assisted index case testing amid high workloads, poor quality contact information, and logistical obstacles to tracing. Participants also reported several health care worker characteristics that facilitate feasibility (knowledge, interpersonal skills, non-stigmatizing attitudes and behaviors, and a sense of purpose), as well as identified process improvements with the potential to mitigate barriers.ConclusionsMaximizing assisted ICT’s potential to increase status awareness in people living with HIV requires equipping health care workers with effective training and support to address and overcome the many feasibility barriers that they face in implementation. Findings demonstrate the need for, as well as inform the development of, implementation strategies to mitigate barriers and promote facilitators to feasibility of assisted ICT.Trial registrationNCT05343390. Date of registration: April 25, 2022.

The interrelatedness between the Nama Khoikhoi supreme being and celestial objects

The assumption among Europeans that the Khoikhoi indigenous people of southern Africa had little to no religious beliefs is evident throughout historical documents. However, if the Khoikhoi were regarded as having any religious beliefs, it was assumed that the moon or sun were objects of worship in the society. Contrary to this incorrect interpretation, this article uncovers the interrelatedness between these two celestial objects and the Supreme Being of the Khoikhoi, Tsũi-||goab, through systematic inquiry. This systematic inquiry seeks to: (1) investigate the interrelatedness between the Supreme Being and the celestial objects, (2) clarify the origins of the assumptions made and (3) explain coherently why and how these assumptions were perpetuated.Contribution: The authors argue that premature conclusions made by outsiders led to there being no need for investigating the religious beliefs of the Khoikhoi society because it was assumed there were none or that they were superficially bound and/or limited to celestial bodies.

Design and rationale of the Botswana Smoking Abstinence Reinforcement Trial: a protocol for a stepped-wedge cluster randomized trial

BackgroundWith expanded and sustained availability of HIV treatment resulting in substantial improvements in life expectancy, the need to address modifiable risk factors associated with leading causes of death among people living with HIV/AIDS (PLWH), such as tobacco smoking, has increased. Tobacco use is highly prevalent among PLWH, especially in southern Africa, where HIV is heavily concentrated, and many people who smoke would like to quit but are unable to do so without assistance. SBIRT (Screening, Brief Intervention and Referral to Treatment) is a well-established evidence-based approach successful at supporting smoking cessation in a variety of settings. Varenicline is efficacious in supporting smoking cessation. We intend to assess the effectiveness of SBIRT and varenicline on smoking cessation among PLWH in Botswana and the effectiveness of our implementation.MethodsBSMART (Botswana Smoking Abstinence Reinforcement Trial) is a stepped-wedge, cluster randomized, hybrid Type 2 effectiveness-implementation study guided by the RE-AIM framework, to evaluate the effectiveness and implementation of an SBIRT intervention consisting of the 5As compared to an enhanced standard of care. SBIRT will be delivered by trained lay health workers (LHWs), followed by referral to treatment with varenicline prescribed and monitored by trained nurse prescribers in a network of outpatient HIV care facilities. Seven hundred and fifty people living with HIV who smoke daily and have been receiving HIV care and treatment at one of 15 health facilities will be recruited if they are up to 18 years of age and willing to provide informed consent to participate in the study.DiscussionBSMART tests a scalable approach to achieve and sustain smoking abstinence implemented in a sustainable way. Integrating an evidence-based approach such as SBIRT, into an HIV care system presents an important opportunity to establish and evaluate a modifiable cancer prevention strategy in a middle-income country (MIC) setting where both LHW and non-physician clinicians are widely used. The findings, including the preliminary cost-effectiveness, will provide evidence to guide the Botswanan government and similar countries as they strive to provide affordable smoking cessation support at scale.Clinical trial registrationNCT05694637 Registered on 7 December 2022 on clinicaltrials.gov, https://clinicaltrials.gov/search?locStr=Botswana&country=Botswana&cond=Smoking%20Cessation&intr=SBIRT

Studies on chevron crickets: Minarisoma gen. nov. (Orthoptera, Anostostomatidae), a new genus and a new species from South Africa

A new genus, Minarisomagen. nov., is described to include three small species of South African distribution: Minarisoma landeckisp. nov. (type species), Minarisoma crassipescomb. nov., and M. tigrinumcomb. nov. These species were previously assigned to the genus Onosandrus. Minarisomagen. nov. marks the ninth genus of king crickets known from southern Africa. A comprehensive key to the identification of species within this newly established taxon is presented. In conclusion, the taxonomic relationships of South African taxa are discussed.

Did plate tectonic changes lead to the emergence of hominid bipedalism?

When early hominids began walking upright around 6 Ma, their evolutionary course took a sharp turn. The new posture enabled physical and mental developments that had not been possible before. The factors driving the transition from quadrupedalism to bipedalism remain open. Most studies have linked this fundamental transition to environmental, topographical, geomorphological, and climatic changes that progressively transformed jungle- and forest-dominated areas of southern and eastern Africa into vast savannas, thus partitioning ecological niches. During the same timeframe, major tectonic events occurred worldwide within a relatively short geological period, due to a significant and sudden shift in the motion of the Pacific plate. In our previous work, we coined the term ripple tectonics to link a major tectonic impact to the short-term local events it caused worldwide. The ripple tectonic cascade in the Pacific around 6 Ma instigated significant environmental transformations in Africa, which ultimately catalyzed the biological evolution of early hominids towards a bipedal posture.

Rewilding landscapes with apex predators: cheetah (Acinonyx jubatus) movements reveal the importance of environmental and individual contexts

Rewilding landscapes through species or population restoration is an increasingly applied practice in biological conservation. There is expanding interest in wildlife release projects for apex predator population augmentation or reintroductions in historical ranges. Cheetahs (Acinonyx jubatus) are an IUCN Vulnerable-listed species with a declining global population facing major threats, which in southern Africa primarily include lethal persecution on livestock farms and bush encroachment transforming open habitats to woody areas. We used GPS radiocollars to monitor ten adult cheetahs from 2007 – 2018 in the Central Plateau of Namibia encompassing an area restored as an open savanna field (13.7 km2) located in a matrix of woodland savanna affected by bush encroachment. We generated a set of a priori hypotheses that tested the effects of various factors on cheetah movements indexed by step length. We compared cheetah movement metrics based on their history as wild, rehabilitated, and/or translocated individuals. Day/night activity, habitat type, and habitat edges were significant predictors of cheetah movement. Wild resident cheetahs displayed significantly longer steps than the other cheetah classes, possibly suggesting increased territorial behaviour in response to the presence of introduced cheetahs. Some cheetahs temporally segregated by moving extensively during daytime, but most individuals were primarily active during crepuscular periods. Small prey remained constant across time, whereas large prey declined over the study period. Cheetahs appeared to adjust behaviourally by increasing movements in years when large prey were scarce. Cheetahs appeared to be ecologically adaptable and behaviourally flexible in response to varying prey populations and when translocated to new environments, specifically at the interface between bush-encroached woodland and open savanna. Environmental settings and animal history need to be carefully considered in rewilding and ecosystem restoration, and monitoring of released and resident individuals, if present, is important to understand ecological dynamics at release sites.

Clarity tubes as effective citizen science tools for monitoring wastewater treatment works and rivers.

Improved freshwater resource management requires the implementation of widespread, effective, and timely water quality monitoring. Conventional monitoring methods are often inhibited by financial, infrastructural, and human capacity limitations, especially in developing regions. This study aimed to validate the citizen-scientist-operated transparency or clarity tube (hereafter "clarity tube") for measuring water clarity as a proxy for total suspended solids (TSS) concentration, a critical quality metric in river systems and wastewater treatment works (WWTW) effluent in Southern Africa. Clarity tubes provided a relatively accurate and precise proxy for TSS in riverine lotic systems and WWTW effluent, revealing significant inverse log-linear relationships between clarity and TSS with r2 = 0.715 and 0.503, respectively. We demonstrate that clarity-derived estimates of TSS concentration (TSScde) can be used to estimate WWTW compliance with WWTW effluent TSS concentration regulations. The measurements can then be used to engage with WWTW management, potentially affecting WWTW performance. Overall, these findings demonstrate the usefulness of clarity tubes as low-cost, accessible, and easy-to-use citizen science tools for high spatial and temporal resolution water quality monitoring, not only in rivers in Southern Africa but also in WWTW effluent for estimating compliance, with strong global relevance to the sustainable development goals (SDGs). Integr Environ Assess Manag 2024;00:1-10. © 2024 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC).