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Clearing invasive alien plant species
Despite the widespread distribution and extent of alien invasive species in South Africa, actions to control such plants have had some good results. In the fight against invasive alien plant species, the Working for Wate...
21 Jun 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Invasive alien plant species potential distribution
Alien plant species pose a major threat to South Africa’s native biodiversity. It is estimated that more than 9 000 plant species have been introduced so far. Of these, about 198 species are deemed invasive, covering 10 ...
21 Jun 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Biodiversity threats
South Africa is recognised as the third most megadiverse country in the world. The abundance of biodiversity found within its borders covers an estimated ten per cent of the world’s plant species, seven per cent of al...
21 Jun 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Carbon storage in terrestrial ecosystems vs. great ape distribution
All great ape species predominantly live in tropical rainforests, which are among the most carbon-rich areas in the world. This overlap between the areas where great apes occur and carbon indicates that more potential sy...
13 Sep 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Land cover change in Batang Toru
Migration from the island of Nias to the West Batang Toru forests over the last two decades has been largely spontaneous. These settlers have opened up primary forests for agriculture and hunt many species of local wildl...
13 Sep 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Forest loss from 1985-2007 for Sumatra
If only the most important orangutan habitat is examined – i.e. forest below 1,000 m – for the 1985-2007 period, the rate of loss was even higher, at 28% and 49% for Aceh and North Sumatra respectively. When only the mos...
13 Sep 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Administration
Sumatran orangutan habitat overlaps 2 Provinces and 21 Districts, presenting many challenges for integrated development policies. 78% of the species’ present range lies within Aceh, and the remaining 22% in North Sumatra...
13 Sep 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Megafauna
Forests that support Sumatran orangutans also harbour high numbers of other animal and plant species, including some of the most emblematic megafauna species in the world, the Sumatran tiger (Panthera tigris sumatrae), S...
13 Sep 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Saiga Antelope populations
The Saiga Antelope is a migratory herbivore of the steppes and deserts of Central Asia and Russia, capable of travelling hundreds of kilometres north to south on its annual migrations. Saigas have been hunted since prehi...
15 Nov 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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