Wentworth Group of concerned Scientists estimate that for just $7.3 billion a year for 30 years, most extinctions could be avoided as well as repairing soil and restoring rivers. That sounds like quite a lot? Well, invasive species cost the Australian government $24.3 billion a year now.
Recovery of some of the endangered species, could well save more than they cost to save, in reducing this invasive species bill. This would also improve agricultural output, as a result of improved soil health.
Around the world, there are invasive species – from grey squirrels in the UK, to Macaques on Gibraltar, however, all these pale on comparison to having to live with wild elephants.
The elephants were bought to the Andaman islands in the late 19th century, to work in the timber operation, which continued until the last few decades. Thankfully, much of the forest in the islands survives – with some islands retaining almost 90% forest cover. This means that the elephants might well be able to thrive into the future.
The islands lie 850 miles from the coast of India, which means that while elephants would not have existed natively on the islands, there are many species which would be found in the same area.
Interview Island and North Andaman hosts these elephants – though they need to be watched, as a population of 100 elephants is already small, but if split between 2 islands, humans may well have to be helped to remain genetically varied enough to survive long-term.
While some have suggested that the elephants have damaged biodiversity, with some species having become less common, this ignores the impact of the timber extraction – it is far more likely that this is an impact of the many decades of pulling specific trees out of the forest.
Given the endangered status of the Indian elephant, this population is precious, but whether it can be left where it is long-term is something we do not know. There are still roughly 30,000 elephants in India, but the Andaman island elephants are going to need to be watch, long-term, to make sure that they do not damage species only found in their new home.
There are perhaps only 10,000 of this species in China, though there are around 700,000 living across the border in South Korea (slightly different subspecies).
They are also doing well in the UK with around 2000 living in the country, having been introduced by the Duke of Bedford into his animal collection, and then quickly escaped (around 100 years ago)
This makes the UK an important part of this species survival. It is particularly easy to see in the Norfolk broads, but is also found in other counties in this area.
These animals cause significant damage to woodland throughout the UK. They were first introduced to Henbury park in Cheshire, but have quickly spread. Being less reliant on trees than red squirrels they have done very well though it is thought that red squirrels were not doing well anyway. A great deal of money and time has been spent trying to control their spread, as they often carry squirrel pox which kills red squirrels quickly, meaning they don’t share land for long.
Huge numbers of species have been disappearing from some or all of their original range in the wild. While there are other reasons for animals to disappear from areas, humans are usually the biggest. This is certainly the case on a micro scale. The majority of impacts of climate change has shifted the entire range for a species in one direction or another. Many mountainous species have shifted their range up hill as the planet has warmed. The problem with this shifting is that often it leaves species stuck in small areas of suitable habitat at the top of hills or mountains. Continue reading “UK extinct species and imported species – Part 1”
