Estimating the monetary cost of biological invasions to South Africa

Biological Invasions, Год журнала: 2024, Номер 26(9), С. 3191 - 3203

Опубликована: Июнь 20, 2024

Abstract Estimates of the cost damage caused by invasive alien speices and money spent addressing biological invasions are needed to guide policy management. Here, we quantify known monetary costs South Africa, using data from InvaCost database, literature searches, stakeholders. The Department Forestry, Fisheries Environment, agencies directly funded them, provided most information on spent, with very little was available other government private sector. There also due impacts invasions. Between 1960 2023, ZAR9.6 billion (adjusted 2022 values) managing in Africa. This is only 4% predicted as being necessary for management, which amounted ZAR231.8 values. uncertainty obtained estimates a paucity both management costs. A few key points emerged our analysis: far exceeds expenditure control; amount control much less than what be needed; almost all has focussed plant species; there large gaps that reduce confidence estimates. Transparent reporting, strategic public–private collaborations, standardised impact metrics, reliable assessments effectiveness enable Africa more effectively account prioritise investments.

Язык: Английский

---

A Brief, Selective History of Researchers and Research Initiatives Related to Biological Invasions in South Africa

Springer eBooks, Год журнала: 2020, Номер unknown, С. 33 - 64

Опубликована: Янв. 1, 2020

Язык: Английский

---

South Africa’s Centre for Invasion Biology: An Experiment in Invasion Science for Society

Springer eBooks, Год журнала: 2020, Номер unknown, С. 879 - 914

Опубликована: Янв. 1, 2020

Язык: Английский

---

Typologies of collaborative governance for scaling nature-based solutions in two strategic South African river systems

AMBIO, Год журнала: 2021, Номер 50(8), С. 1587 - 1609

Опубликована: Июнь 1, 2021

Язык: Английский

---

Microbial Communities in the Fynbos Region of South Africa: What Happens during Woody Alien Plant Invasions

Diversity, Год журнала: 2020, Номер 12(6), С. 254 - 254

Опубликована: Июнь 22, 2020

The Cape Floristic Region (CFR) is globally known for its plant biodiversity, and flora commonly referred to as fynbos. At the same time, this area under severe pressure from urbanization, agricultural expansion threat of invasive alien plants. Acacia, Eucalyptus Pinus are common plants found across biome considerable effort resources put into removal rehabilitation native vegetation. Several studies have shown that invasion not only affects composition species, but also has a profound effect on soil chemistry microbial populations. Over last few years, number populations CFR unique area, harbour many endemic species. extent role they play in process is, however, still unclear. This review aims provide an insight current knowledge different system, speculate what their might be during invasion. More importantly, it places spotlight lack information about process.

Язык: Английский

---

Exploring the use of indigenous Western Cape plants as potential water and soil pollutant phytoremediators with a focus on green infrastructure

Water SA, Год журнала: 2021, Номер 47(3 July)

Опубликована: Июль 29, 2021

Urban water managers, engineers and conservation ecologists in the Western Cape (WC) Province of South Africa are faced with a major environmental human health challenge, urbanisation, industrialisation, population growth agricultural development placing pressure on limited soil resources. In addressing this resource degradation an effective, affordable sustainable solution is required. The implementation ‘green infrastructure’ (GI), such as phytoremediation, involves use plants to hinder pollutant transport attenuate runoff flow, protecting environment. However, care must be taken when selecting plant species due possible invasive behaviour, affecting ecosystem dynamics. As result need for remediation both urban rural areas, non-invasive indigenous vital efficient technology, areas often initial sites introduction from which invasions spread. This paper proposes WC potential GI, identified global bioremediation literature, aid practicing civil engineer manager responsible design management phytotechnology. These offer phytoremediators local well suggest types that should investigated further alternatives effective exotics. investigation returned 56 likely without jeopardising biodiversity administered area. selected vegetation potentially capable increasing heterogeneity adjusting dynamic biogeographic conditions recipient habitat. Thus, distinct remediating wide range contaminants into diverse habitats WC, at fraction cost conventional techniques, promoted.

Язык: Английский

---

Guiding restoration of riparian ecosystems degraded by plant invasions: Insights from a complex social-ecological system in the Global South

AMBIO, Год журнала: 2021, Номер 51(6), С. 1552 - 1568

Опубликована: Дек. 28, 2021

Язык: Английский

---

Biological Control of Three Eupatorieae Weeds in South Africa: 2011–2020

African Entomology, Год журнала: 2021, Номер 29(3)

Опубликована: Дек. 31, 2021

Several weed species within the asteraceous tribe Eupatorieae, all with a neotropical origin, are invasive in South Africa. Three of these form subject this review paper: Chromolaena odorata (triffid weed), Campuloclinium macrocephalum (pompom and Ageratina adenophora (crofton weed). The three invade different habitats regions, have biological control (biocontrol) agents established on them. was first weeds to be subjected biocontrol programme Africa, two (an insect pathogen) released 1980s. Two were C. early 2000s, third one, 2011, has persisted for at least eight years – insects. One agent 2013, although pathogen had appeared several earlier. A. under substantial certain habitats, but negligible others. 2013 is causing significant damage plant where it well. other been failed establish. For weedy considered desirable establish additional agents, so as increase level priority targets An already approved release against macrocephalum, while one close being odorata. There possibilities adenophora.

Язык: Английский

---

Continuous Monitoring of Vegetation and Soil Recovery After Eucalyptus grandis Removal in Dense Trees and Shrubs Areas

African Journal of Ecology, Год журнала: 2024, Номер 62(3)

Опубликована: Сен. 1, 2024

ABSTRACT Invasion by invasive alien plants is a global challenge and South Africa has invested billions of Rands to manage invaders through the Working for Water programme. However, regular monitoring after plant clearing hardly done, yet it forms basis assessing programme effectiveness, particularly ecosystem recovery trajectories. I monitored both vegetation soil 6 years Eucalyptus grandis at Zvakanaka Farm in Limpopo Province Africa. Vegetation diversity physical properties were surveyed 2019 re‐surveyed 2022 on fell‐and‐removal fell‐and‐stackburn cleared treatments compared nearby uninvaded treatment. Results show significant increase species richness Cover native trees shrubs as well forbs was significantly higher treatment Most secondary such Acacia mearnsii , E. cloeziana Lantana camara Rubus rigidus that frequently occurred showed decreased occurrence treatments. Between two sampling years, compaction improved only, whereas hydraulic conductivity increased Soils strongly severely repellent becoming slightly 2022. These results varied improvements between an indication moving towards positive trajectory direction Recommendations successful passive restoration invasion follow‐up are discussed.

Язык: Английский

---

Propagating uncertainty from catchment experiments to estimates of streamflow reduction by invasive alien plants in southwestern South Africa

Hydrological Processes, Год журнала: 2021, Номер 35(4)

Опубликована: Апрель 1, 2021

Abstract Long‐term catchment experiments from South Africa have demonstrated that afforestation of grasslands and shrublands significantly reduces surface‐water runoff. These results guided the country's forestry policy implementation a national Invasive Alien Plant (IAP) control programme for past few decades. Unfortunately, woody IAP densities continue to increase, compounding existing threats water security population growth climatic change. Decision makers need defensible estimates impacts or invasions on runoff weigh up alternative land use options, guide investment limited resources into ecosystem restoration through clearing versus engineering‐based water‐augmentation schemes. Existing attempts extrapolate observed in broad‐scale give no indication uncertainty. Globally, uncertainty inherent paired‐catchment is seldom propagated subsequent analyses making these data. We present fully reproducible Bayesian model propagates input data final changes streamflow when extrapolating broader landscapes. apply our Africa's experiment data, estimating losses plantations analogous plant catchments southwestern Africa, including estimate regional reduced by 304 million m 3 4.14% annually as result IAPs, with an upper 408 (5.54%) lower 267 (3.63%). Our quantifies associated all parameters their contribution overall uncertainty, helping future research needs. Acknowledging quantifying enables more decisions regarding resource management.

Язык: Английский

---