Renewed poaching has threatened this recovery, as rhinoceros horn has attained an unprecedented and steadily rising value of $65,000 per kilogram 1. 1b), the black rhinoceros now survives in only five countries: South Africa, Namibia, Kenya, Zimbabwe and Tanzania (ranked by total population size). Despite a historic range that included much of sub-Saharan Africa ( Fig. During the 20 th century, populations are thought to have declined by more than twenty-fold until the mid-1990s, when intensive protection led to a population recovery to just over 5,000 individuals by 2014. longipes) declared extinct in 2011, has raised fears that this species will disappear from the wild within the next two decades 1 ( Fig. The well documented poaching and subsequent demographic collapse of black rhinoceros ( Diceros bicornis) populations, including the western subspecies ( D. Our results suggest a complete re-evaluation of current conservation management paradigms for the black rhinoceros. We also identify conservation units that will help maintain evolutionary potential. longipes), declared extinct in 2011, extends into southern Kenya, where a handful of individuals survive in the Masai Mara.
We found that the historic range of the West African subspecies ( D. Genetically unique populations in countries such as Nigeria, Cameroon, Chad, Eritrea, Ethiopia, Somalia, Mozambique, Malawi and Angola no longer exist. Using both mitochondrial and nuclear datasets, we described a staggering loss of 69% of the species’ mitochondrial genetic variation, including the most ancestral lineages that are now absent from modern populations. Here we examined the range-wide genetic structure of historic and modern populations using the largest and most geographically representative sample of black rhinoceroses ever assembled.
This knowledge gap has hampered conservation efforts because hunting has dramatically reduced the species’ once continuous distribution, leaving five surviving gene pools of unknown genetic affinity. Despite a wide historic distribution, the black rhinoceros was traditionally thought of as depauperate in genetic variation, and with very little known about its evolutionary history. The black rhinoceros is again on the verge of extinction due to unsustainable poaching in its native range.
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