Biological Invasions in South Africa: An Overview

Springer eBooks, Journal Year: 2020, Volume and Issue: unknown, P. 3 - 31

Published: Jan. 1, 2020

Language: Английский

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The Biogeography of South African Terrestrial Plant Invasions

Springer eBooks, Journal Year: 2020, Volume and Issue: unknown, P. 67 - 96

Published: Jan. 1, 2020

Language: Английский

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A review of the impacts of biological invasions in South Africa

Biological Invasions, Journal Year: 2021, Volume and Issue: 24(1), P. 27 - 50

Published: Sept. 1, 2021

Language: Английский

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Modeling the distribution of Aloe ankoberensis and A. debrana under different climate change scenarios in North Shewa Zone, Amhara National Regional State, Ethiopia

Ecological Processes, Journal Year: 2024, Volume and Issue: 13(1)

Published: May 17, 2024

Abstract Background Aloe ankoberensis M.G. Gilbert & Sebsebe and A. debrana Christian are Ethiopian endemic species currently classified as endangered least concern, respectively under International Union for Conservation of Nature (IUCN) categories. Recent studies indicate that climate change is anticipated to significantly influence the distribution plant species. Therefore, this study aimed model different scenarios in North Shewa Zone, Amhara National Regional State Ethiopia. Thirty-six 397 georeferenced presence points , respectively, 12 environmental variables were used simulate their current future distributions. The ensemble approach was examine (2050 2070) climatic suitability both three shared socio-economic pathway (SSP) (SSP 2.6, 4.5 8.5). Results performance excellent with score area curve (AUC) 0.96 true skill statistics (TSS) 0.88, good AUC 0.87 TSS 0.63. main affected species' distributions mean diurnal range temperature, annual precipitation, elevation. According model, conditions, 98.32%, 1.01%, 0.52%, 0.15% not suitable, lowly, moderately, highly suitable areas, 63.89%, 23.35%, 12.54%, 0.21% moderately . Under scenarios, habitats these could shrink. In addition, all it areas will be lost completely unless crucial interventions done on time. Conclusions results may witness a decline habitat which leads increasing threat extinction. develop conservation plan enhance adaptation strategies mitigate loss highland sub-Afroalpine

Language: Английский

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An Evaluation of the Impacts of Alien Species on Biodiversity in South Africa Using Different Assessment Methods

Springer eBooks, Journal Year: 2020, Volume and Issue: unknown, P. 489 - 512

Published: Jan. 1, 2020

Language: Английский

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The vegetation cover dynamics and potential drivers of habitat change over 30 years in the Free State National Botanical Garden, South Africa

Regional Environmental Change, Journal Year: 2023, Volume and Issue: 23(1)

Published: Jan. 11, 2023

Abstract As a conservation strategy, the South African National Biodiversity Institute (SANBI) establishes biodiversity gardens in areas with unique vegetation types that are vulnerable to extinction. The study aimed (1) determine cover dynamics of Free State Botanical Garden (FSNBG) over 30-year period (1987–2017), focusing on different classes; (2) evaluate ecological integrity Critical Area 1 (CBA1) using species abundance and cover; (3) quantify potential threats may be drivers changes. “moderate cover” “dense had increased by 25.1 ha 8.6 respectively FSNBG. Woody expanded significantly past period, suggesting “bush” encroachment. Shannon–Wiener diversity indices showed high overall plant CBA1 type ( H = 3.5), remaining (79.6 ± 15.9%), 50 no longer existing, reduced taxonomic richness. Major included presence 27 alien invasive interspersed within patches anthropogenic habitat fragmentation 19 years (i.e. covering ~ 18% buffer zone). We conclude is associated bush encroachment we recommend interventions reduce population density woody plants establish permanent monitoring plots.

Language: Английский

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Terrestrial Vertebrate Invasions in South Africa

Springer eBooks, Journal Year: 2020, Volume and Issue: unknown, P. 115 - 151

Published: Jan. 1, 2020

Language: Английский

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The invasion threat of the emerging alien cactus Cylindropuntia pallida (Rosa), F.M. Knuth in South Africa and the potential for control using herbicides

Environmental Monitoring and Assessment, Journal Year: 2024, Volume and Issue: 196(7)

Published: June 28, 2024

The emerging alien cactus Cylindropuntia pallida (Rose) F.M. Knuth originates from northern Mexico and introduced into South Africa in 1940s as an ornamental plant. Multiple populations of C. have been detected various areas Africa. has effective propagule dispersal rapid recruitment making it a likely key future invader, thus, is target for eradication To eradicate populations, foliar spray (i.e. using 2% concentration herbicide with fluroxypyr triclopyr) applied to plants nine population sizes ranging between 535 2701 covering 100 -1000 ha. aims the study were investigate efficacy method used pallida; impacts invasions on native vegetation integrity; apply species distribution models (SDMs) identify suitable climates Africa; document biomes vulnerable negative impact Results show that killed many (mean percentage dead ± SE, 83.3 6.4; n = 9; range, 70-96%), adult taking about 2 months die completely. was not affected by plant size or used. invaded site had significantly greater cover which persisted across winter compared uninvaded site, but latter site's dropped winter. Also, lower diversity than dominated Poaceae Asteraceae families. Additionally, normalised difference index (NDVI) analysis shows higher health wherein notable decline observed 2019 2022. A large area (> 15 million hectares) predicted be invasion provinces arid warm temperate - fynbos grassland are most vulnerable. Because impacts, high environmental compatibility, cost clearing infestations, we advocate considering biocontrol effectively managing

Language: Английский

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Analysing the Risks Posed by Biological Invasions to South Africa

Springer eBooks, Journal Year: 2020, Volume and Issue: unknown, P. 573 - 595

Published: Jan. 1, 2020

Language: Английский

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Harmonising the fields of invasion science and forest pathology

NeoBiota, Journal Year: 2020, Volume and Issue: 62, P. 301 - 332

Published: Oct. 15, 2020

Invasive alien species are widely recognised as significant drivers of global environmental change, with far reaching ecological and socio-economic impacts. The trend continuous increases in first records, no apparent sign saturation, is consistent across all taxonomic groups. However, biases exist the extent to which invasion processes have been studied. forest pathogens caused, they continue result dramatic damage natural forests woody ecosystems, yet their impacts substantially underrepresented science literature. Conversely, most studies undertaken absence a connection frameworks developed used study biological invasions. We believe this is, part, consequence mechanistic approach discipline pathology; one that has inherited from broader plant pathology. Rather than investigating origins of, driving arrival invasive microorganisms, focus pathologists generally investigate specific interactions between hosts pathogens, an emphasis on controlling resulting disease problems. In contrast, central field science, finds its roots ecology, development testing general concepts frameworks. lack knowledge microbial biodiversity speciation geographic origin present challenges understanding under existing frameworks, there need address shortfall. Advances molecular technologies such gene genome sequencing metagenomics increased “visibility” microorganisms. consider whether these being adequately applied gaps pathology science. also interrogate two fields stand gain by becoming more closely linked.

Language: Английский

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