‘Sky islands’ in Africa are producing more new species than anywhere else

Sky islands like this one Mount Lico in Mozambique

Sky islands are found across much of Africa. Our experience of sky islands, occurred within the Udzungwa national park in Tanzania. This national park protects a large portion of the Eastern arc mountains. – a chain of mountains which run across Eastern Tanzania.

Africa started drying out around 5500 years ago, and much changed at this point, including a great expansion of the Sahara. However, what is relevant here, is that in many parts of the continent, this caused the rainforests to retreat. More rain falls on higher ground, so you were left with a situation where the tops of hills and mountains remain forested, but the valleys become savannahs. Perhaps one of the most notable effects of this, was to split the worlds mountain gorillas into two populations, one in the Bwindi impenetrable forest in Uganda and the other in the Virunga ecosystem. At their closest point, these two protected areas are only 20km apart (though driving between the two are likely to take longer, as visitor facilities are not at these points). Unfortunately, this space between the two areas has a large human population. This means that the two mountain gorilla populations were stuck on their respective mountain homes, relatively close together, but with no way to cross the gap between.

Not researched until recently, there is a strip of mountains that runs from northern Mozambique to Malawi’s Mount Mulanje. As with the eastern arc mountains, rainforest was preserved on these peaks. These were finally given scientific attention by an internatiional team in the South East Africa Montane Archipelago study. While archipelagos are usually used to refer to a group of islands, it seems apt here. Among these mountains, there are around 30 fragmented pockets of grasslands and evergreen forests that have been largely cut off from each other.

This is perfect for housing unique collections of species, that have found themselves cut off from other habitat that they once roamed. This study, identified 90 species from amphibians(11), reptiles(22), birds(3), mammals(4), butterflies(39) and freshwater crabs(6), alongside 127 species of plant, not found anywhere else on earth. These sky islands are even being considered for their own ecoregion.

Big or small, it is important to protect these little ecological islands, and it should be possible to have tourists visit to give an extra income to locals.

November 24, 2024November 22, 2024

The livestock lobby is fighting against lab-grown meat this is why we must not let them win

Livestock takes up roughly 20% of the worlds land, or around 50% of the worlds agricultural land. Astoundingly, around 1.3 billion people around the world are involved in the livestock industry.

The worlds remaining land wilderness, takes up just 25% of the worlds land – should we move toa system of growing meat in labs, we could almost double the amount of space for wildlife, which would allow many of the worlds endangered species to recover.

Apart form saving so much of the worlds wilderness, and wildlife, why should we do this? Well, firstly, the fact that people want things to stay as they are, is not new. Every new invention has lead to a change in the lives of many people – before farming came into existence, all the healthy men of each village (and in places, many of the healthy women) would have spent the majority of their time hunting. Looking at the natural world, animals like lion and leopard split their time between hunting and resting, with little else (apart from reproduction) being thought of.

As electric cars started to appear, the vast majority of car companies tried to stop their progress. Indeed, many spent their time buying inventions and smaller companies, just to kill their electric car program. This was not because they were intrinsically afraid of the electric car, but because they were afraid that if adopted, they might have a smaller market share than they did with the internal combustion engine car. As tends to happen in this situation, however, many of these companies are thought likely to go out of business in the next 2 decades (and it took a start-up, Tesla to fully make electric cars work – even now, many are still trying to go back). The same can be said for the factory production line, and many many others.

The problem is that livestock farming is only second to the fossil fuel industry, in terms of its contribution to climate change, so if humanity is to survive, it needs to change dramatically.

Why should we be worried about saving the worlds wildernesses? I think that a great deal of the population feels that we should save them for their own intrinsic value, but there is more than that. Rainforests around the world are the engine that supplies much of these areas rain, and without the rainforest often the area will collapse into desert.

Some suggest that we should all go to a plant-based diet, and certainly this would do what we want (though it should be noted, that this leaves the livestock industry in the same place – indeed, the livestock industry as it currently is, must have its days numbered, as humanity cannot afford its carbon footprint or it will continue our descent into climate breakdown). The only alternative to this is to produce the dairy and meat through other means; and these means are multiplying around the world, as it is recognized that there is a lot of money available for those who solve it early.

These range from growing meat on a scaffold from cells taken from a live animal. This idea is rapidly growing in popularity, though some think that this is a dead end, and instead a lot of people are looking at brewing microbes, which can be made to have a taste and texture that will make them indistinguishable from the real thing. This would also allow the unhealthy parts like fat to be not grown. It avoids the need for a lot of land, needs no fertilizer and greatly reduces the amount of fresh water needed (some can use salt water).

Protectionism is not restricted to farmers, with many governments getting in on the act, and in the EU a new group is pushing for a continent wide ban.

I think that these things will be developed somewhere, and we will miss out, if this happens in places like China (they have a great incentive, as their population eats little real meat, but as the wealth of people are increasing, they are demanding to eat a diet more like the west. For most of us, we are going to be watching from the sidelines, in terms of what happens next, but we can write to our representatives, and make sure that livestock owners are not the only voices that they hear.

1. Tragelaphini – spiral-horned antelope

1. Tragelaphini - spiral-horned antelope

Bushbuck

The Cape bushbuck , also known as imbabala is a common, medium-sized and a widespread species of antelope in sub-Saharan Africa. It is found in a wide range of habitats, such as rain forests, montane forests, forest-savanna mosaic, savanna, bushveld, and woodland. Its stands around 90 cm at the shoulder and weigh from 45 to 80 kg. They are generally solitary, territorial browsers.

Although rarely seen, as it spends most of its time deep in the thick bush, there are around 1 million in Africa

Common Eland

The common eland (southern eland or eland antelope) is a large-sized savannah and plains antelope from East and Southern Africa. An adult male is around 1.6 m tall at the shoulder (females are 20 cm shorter) and can weigh up to 942 kg with a typical range of 500–600 kg. Only the giant eland is (on average bigger). It was described by Peter Simon Pallas in 1766. Population of 136,000, can form herds of 500

Giant Eland

The giant eland, (also known as Lord Derby’s eland and greater eland) is an open-forest and savanna antelope.

It was described in 1847 by John Edward Gray. The giant eland is the largest species of antelope, with a body length ranging from 220–290 cm (87–114 in). There are two subspecies: T. d. derbianus and T. d. gigas.

The giant eland is a herbivore, living in small mixed gender herds consisting of 15–25 members. Giant elands have large home ranges. They can run at up to 70 km/h. They mostly inhabit broad-leafed savannas and woodlands and are listed as vulnerable and have a wild population of 12,000-14,000

Greater Kudu

The greater kudu is a large woodland antelope, you can see its distribution on the map. Despite occupying such widespread territory, they are sparsely populated in most areas due to declining habitat, deforestation, and poaching.

The spiral horns are impressive, and grow at one curl every 3 years – they are fully grown at 7 and a half years with 2 and a half turns. Three subspecies have been agreed (one described has been rejected) :

T. s. strepsiceros – southern parts of the range from southern Kenya to Namibia, Botswana, and South Africa
T. s. chora – northeastern Africa from northern Kenya through Ethiopia to eastern Sudan, Somalia, and Eritrea
T. s. cottoni – Chad and western Sudan

They are listed as near threatened with 118,000 in the wild

Lesser Kudu

The lesser kudu is a medium-sized bushland antelope found in East Africa. It was first scientifically described by English zoologist Edward Blyth (1869).It stands around 90 cm at the shoulder and weigh from 45 to 80 kg. They are generally solitary, territorial browsers.

While currently rated not threatened, its population is decreasing. It currently stands at 100,000, but it is loosing territory to humans

Common Bongo (and mountain Bongo)

The bongo is a large, mostly nocturnal, forest-dwelling antelope, native to sub-Saharan Africa. Bongos are characterised by a striking reddish-brown coat, black and white markings, white-yellow stripes, and long slightly spiralled horns. It is the only member of its family in which both sexes have horns. Bongos have a complex social interaction and are found in African dense forest mosaics. They are the third-largest antelope in the world.

The Common (western or lowland bongo), faces an ongoing population decline, and the IUCN considers it to be Near Threatened.

The mountain bongo (or eastern) of Kenya, has a coat even more vibrant than the common version. The mountain bongo is only found in the wild in a few mountain regions of central Kenya. This bongo is classified by the IUCN as Critically Endangered (where it breeds readily). (this is not on the map above). Only 100 live wild, split between 4 areas of Kenya

Nyala

The Nyala is a spiral horned species

found in Southern Africa. The nyala is mainly active in the early morning and the late afternoon. It generally browses during the day if temperatures are 20–30 °C and during the night in the rainy season. The nyala feeds upon foliage, fruits and grasses, and requires sufficient fresh water. It is a very shy animal, and prefers water holes to the river bank. Not territorial, they are very cautious creatures. They live in single-sex or mixed family groups of up to 10 individuals, but old males live alone. They inhabit thickets within dense and dry savanna woodlands. The main predators of the nyala are lion, leopard and African wild dog, while baboons and raptorial birds prey on juveniles. Males and females are sexually mature at 18 and 11–12 months of age respectively, though they are socially immature until five years old. They have one calf after 7 months of gestation. Its population is stable, with the greatest threat coming from habitat loss as humans expand. There are thought to be 36500 and the population is stable.

Mountain Nyala

The mountain Nyala (also known as the Balbok) is a large antelope found in high altitude woodlands in just a small part of central Ethiopia. The coat is grey to brown, marked with two to five poorly defined white strips extending from the back to the underside, and a row of six to ten white spots. White markings are present on the face, throat and legs as well. Males have a short dark erect crest, about 10 cm (3.9 in) high, running along the middle of the back. Only males possess horns.

The mountain nyala are shy and elusive towards human beings. They form small temporary herds. Males are not territorial. Primarily a browser. They will grazing occasionally. Males and females are sexually mature at 2 years old.. Gestation lasts for eight to nine months, after which a single calf is born. The lifespan of a mountain nyala is around 15 to 20 years.

Found in mountain woodland -between 3000m and 4000m. Human settlement and large livestock population have forced the animal to occupy heath forests at an altitude of above 3,400 m (11,200 ft). Mountain nyala are endemic to the Ethiopian highlands east of the Rift Valley. As much as half of the population live within 200 square km (77 sq mi) area of Gaysay, in the northern part of the Bale Mountains National Park. The mountain nyala has been classified under the Endangered category of the (IUCN). Their influence on Ethiopian culture is notable, with the mountain nyala being featured on the obverse of Ethiopian ten cents coins.

Situnga Antelope

The sitatunga (or marshbuck)is a swamp-dwelling medium-sized antelope found throughout central Africa (see the map to the right. The sitatunga is mostly confined to swampy and marshy habitats. Here they occur in tall and dense vegetation as well as seasonal swamps, marshy clearings in forests, riparian thickets and mangrove swamps.

The scientific name of the sitatunga is Tragelaphus spekii. The species was first described by the English explorer John Hanning Speke in 1863.

It is listed as least concern with 170,000-200,000, and are found in 25 countries. However 40% live outside reserves, so the situation could get worse fast.

Note: these animals have been dealt with in less detail than others. Should you be interested in finding out if I have written on these animals or what exactly I said, you can find a list of articles about each below its information.

1. Tragelaphini – spiral-horned antelope