File:Percentage of Sub-Saharan Africa invertebrates, plants, reptiles, mammals that have gone Extinct, Extinct in the Wild, likely Extinct since the year 1500.png
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| Beschreibung | Original description, according to the source, p. 260: "Figure 8.2 Percentage of Sub-Saharan Africa invertebrates, plants, reptiles, and mammals that have gone Extinct, Extinct in the Wild, and likely Extinct since the year 1500. Dashed line represents the natural rate of extinctions expected without human influences. After Ceballos et al., 2015, CC BY 4.0." Context in the source, page 159f: "If extinction and speciation are natural processes, an obvious question follows: “Why should we care about the loss of biodiversity?” The answer concerns not individual species extinctions as much as the increasing rate of these extinctions (Figure 8.2). While a species can be wiped off Earth over a relatively short period of time, speciation typically occurs slowly as the genetic makeup of a population shifts over thousands of years. Unfortunately, we are currently losing species 1,000 times faster than natural background extinction rates (for mammals estimated to be 1.8 extinctions per 10,000 species per 100 years, Barnosky et al., 2011), and future rates may be 10,000 times higher that background rates (de Vos et al., 2015). Because over 99% of current species extinctions have been linked to human activity rather than natural processes (Pimm et al., 2014), observations on past extinctions and subsequent speciation may not apply to the present. Moreover, unlike before, humans now share the planet with the species we are wiping out. These losses mean that we are also losing the benefits we gain from nature (Chapter 4) at unprecedented rates." |
| Datum | |
| Quelle | John W. Wilson, Richard B. Primack: "Conservation Biology in Sub-Saharan Africa", Chapter 8: "Extinction Is Forever", Open Book Publishers, Cambridge, UK, 2019, ISBN: 978-1-78374-751-1, pp. 257–296, here p. 260, Figure 8.2, DOI: https://doi.org/10.11647/OBP.0177, License: Creative Commons Attribution 4.0 International license (CC BY 4.0). Original URL of the image: https://books.openbookpublishers.com/10.11647/obp.0177/image/Fig_8.2.png |
| Urheber | After Ceballos et al., 2015, CC BY 4.0. (Ceballos, G., P.R. Ehrlich, A.D. Barnosky, et al. 2015. Accelerated modern human-induced species losses: Entering the sixth mass extinction. Science Advances 1: e1400253. https://doi.org/10.1126/sciadv.1400253) |
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  Diese Datei ist lizenziert unter der Creative-Commons-Lizenz „Namensnennung 4.0 international“.
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| aktuell | 11:49, 26. Dez. 2023 | | 1.103 × 723 (99 KB) | Anglo-Araneophilus (Diskussion | Beiträge) | {{Information |Description=Original description, according to the source, p. 260: "Figure 8.2 Percentage of Sub-Saharan Africa invertebrates, plants, reptiles, and mammals that have gone Extinct, Extinct in the Wild, and likely Extinct since the year 1500. Dashed line represents the natural rate of extinctions expected without human influences. After Ceballos et al., 2015, CC BY 4.0." Context in the source, page 159f: "If extinction and speciation are natural processes, an obvious question fo... |
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