Tag: forest

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‘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.

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Pine marten roundup

For any readers who do not know what a pine marten is, the above will give you an idea. It is an arboreal predator (that is, it hunts in the trees). There are a total of 8 species of marten across the world. Historically, this was the second most common predator in the UK, with only the fox being more common.

Unfortunately, its habit of taking chickens lead to it being hunted ruthlessly. At the current time, it hangs on in Wales, and has a significant population in Scotland. In Ireland, the recovery is far further along.

In the UK, one of the reasons that we miss this little predator, is its impact on grey squirrels. Unlike the pine marten, the grey squirrel is not native to the UK, and its presence does much damage, from its impact on trees, and other plants, to the fact that it carries a disease which wipes out the reds rapidly (so they are incapable of living alongside each other). This is a species which I have followed closely, and while other matters have stopped me blogging on this species as often as I would like, it has not stopped me from reading about it, so you will find summaries of a variety of stories below.

 

 

Reintroduction project in Dartmoor: 15 pine martens were released in secret locations within Dartmoor in September. A total of 7 conservation organisations have been involved in this translocation. It is a total of around 150 years since pine martens were last in the area, but the translocated individuals are settling and slowly dispersing across the landscape.

To the right you will find a tiktok video which will give you details on this reintroduction.

@woodland_trust Pine martens are back in Dartmoor! 🎉    This conservation success story is the work of The Two Moors Pine Marten Project which we’re a partner of. 🌳    Site manager David Rickwood explains more. 📽    Learn more at 👉 twomoorspinemartens.org  @National Lottery Heritage Fund   #woodlandtrust #wildlife #britishwildlife #wildlifetok #pinemartens #dartmoor #conservation ♬ original sound - Woodland Trust

While there is no idea where the pine martens came from, they appear to be doing well, and as the video shows, are breeding. While they have not been there long, so there is little evidence yet, it is highly likely that the pine marten arrival will be bad for local grey squirrel populations (a non-native squirrel which does much damage to UK woodland). This is an area of excitment and should be followed closely.

Pine marten spotted on Longleat estate

Pine marten caught on camera trap in Longleat estate in Wiltshire. It is unclear where this individual came from, lying half way between the forest of dean and the new forest (but far from both), but it is thought it has arrived naturally. While red squirrels would not be able to reappear in this part of the country, without help, as all surrounding areas have grey squirrels, should the pine marten survive, it is likley to greatly impact the local popualtion, and create an island, into which red squirrels could eventually return.

Pine marten in the forest of dean

Pine marten were translocated from Scotland into the forest of dean, beginning in autumn of 2019, when 19 were introduced, and a further 35 joined them in the next 2 years. Last summer, there was an estimate of 60 living in the forest, which while not a big increase, it has not fallen.

While the forest of dean covers just over 200 square miles, it is thought that 60 is roughly the carrying capacity. That suggests that the pine martens in the forest of dean need roughly twice as much space as elsewhere, so time will tell if the population can grow beyond this level. Still, it seems likely that this number of pine martens should be able to eradicate the grey squirrel, or at least greatly reduce its number in the area.

The below video shows 3 cubs from around 4 years ago.

 

Pine marten in the forest of dean

Research is being done on whether pine martens can live in timber forests – which account for a lot of forest in Scotland

Some simple changes may well allow timber and pine martens to flourish alongside each other. Across 1 woodland, a number of nest boxes have been added, which appears to be helping. The plantations are also looking at letting some older trees stay standing, as these are where cavities appear, which is the pine martens natural home. This research is being carried out in the forest of Ae and around Castle O’er.

Pine martens have turned up in a London cemetery, in area of England where they have not been seen for 150 years 

The Zoological Society of London ZSL (London Zoo)  already had a project in the area with remote cameras, as it is a stronghold for the hedgehog (unfortunately, another species with a horrific decline in the last 20-30 years). It was just one (and this was in 2022, so may well be gone), but it is exciting that such a small area can house an animal like this.

The Forest of dean, is 80 miles away, which is the nearest population, so it is thought that this might have to be the result of an illegal translocation (they are being translocated, but should be done by professionals, with checks and more.

Pine marten recovery is further along, and helps understand how it will work in England, particularly in cities (not the safe zone once thought)

 Once almost extinct, for similar reasons in the UK (habitat destruction, and persecution) in 1976 they were given legal protection, and at the same time, forestry started to expand once again. The pine marten is how living in around 45% of Ireland.

The red squirrel is recovering as a result. There was a fear that grey squirrels would survive within cities, as pine martens are generally to shy to venture into even large parks within cities. However, what has been found, is that the abundance of squirrels in cities is a mirage – there are only sustained by populations outside the city, therefore, should places like the green belt around London get settled by pine martens, it is likely that the London squirrels would disappear within a few years.

Similar to elsewhere, pine martens have now also been introduced to the Lake district.

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Deforestation and palm oil stories: Deforestation is not a desire, there is demand for what is done with the land

Cattle in a newly deforested area on the edge of more Amazon rainforest – threatened in the future? photo credit Alice Mitchel

The problem with stopping deforestation, is that for the majority of the world we are far removed from rainforests (from where I sit in the UK, I would have to travel 3250km (over 2000 miles) to the nearest rainforest, which is an area on mainland India). Indeed, rainforest is generally something that only survives in developing countries.

This means that, for most people, they either live far removed from the rainforest, and so cant see it impacting them, or they live near a rainforest, but are struggling to provide for their family and those around them. It is quite true that many people in both the first and third world would like the rainforest to survive – indeed, should you talk to people in the west, many are very worried about the survival of the great apes, who are rapidly loosing land.

The problem is simple. Those living in the third world are living hand to mouth, so unless they work in tourism, the rainforest is often an inconvenience that makes life harder.

In 2023 a total of 6.4 hectares of forest were destroyed – more than 25,000 square miles. However, more concerning is the fact that 62.6 million hectares of forest (almost quarter of a million square miles) was degraded – for road building, logging, and forest fires. Degraded land is often less good for carbon storage, as well as conservation of the worlds wild species. It is often, then not long, before someone comes along a removes the rest of the plants so that the land can be used for something else.

And what was this deforestation for (other than logs)? Beef, soy, palm oil paper and nickel.

The Brazilian Amazon is one of the bright spots, where since the election of Luiz Inacio Lula da Silva, deforestation has fallen 62%. Unfortunately, in the same time period, Indonesia’s deforestation is up 57%

It seems hard to see how the world will meet its goal of cutting deforestation to zero by 2030 as most countries have pledged. Also, despite reductions in deforestation, the Amazon has had one of the hardest years in terms of forest fires – something that only gets more likely as rainforests are lost, and climate change increases the temperature in many parts of the world. It is a sad fact, that there is often not a great deal of temperature difference between a rainforest which is functioning, and one that dries out and becomes a fire hazard.

Having said all this… a study in Indonesia has found that controlled low-intensity logging doesn’t have to negatively impact a forest in terms of carbon storage or food availability – this in turn means that much wildlife can survive.

The problem often is that if the land is in private hands, then low- intensity logging is not going to happen. If the landowner has decided to deforest, they will raze the land. In national parks, in theory low intensive logging would be possible, but this would require people to control the logging, and this is the issue that we have in the first place. Unfortunately, despite the pledge by 140 countries, deforestation is coming back.

In a related subject, the Indonesian president Prabowo Subianto has stated that palm oil expansion won’t deforest because palm oil has leaves. There are many issues with this, but perhaps primarily amongst them, when forests are cut down, they are usually replaced with grass lands for grazing cattle – these are also covered in leaves. This is obviously stupid – it may well be a better thing, that the rainforest is going to be replaced with plantations, but it has been shown that palm oil plantations take up a tiny proportion of the carbon that rainforests take up.

In another article, there was a finding that macaques living in palm oil plantations have an alarming infant mortality. Unfortunately, these macaques are not unique in being threatened by palm oil, but others include orangutans, elephants, tigers, pangolins, bonobos, and Irrawaddy dolphins.

While palm oil may be a better vegetable oil than other crops, it still looks like it will lead to us loosing most of our rainforests, unless a grip on this is found.

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Palm oil deforestation continues in the Leuser ecosystem

Ulu Masen forest, Aceh, Indonesia photo credit:Abbie Trayler-Smith CC BY-NC-ND 2.0

The Leuser ecosystem is one of the most biodiverse in the world, and is the only place where tiger orangutans elephants and rhino can all be found in the same place (and this ignores various special species such as bears and gibbons among many others, which still call this ecosystem home).

This deforestation, carried out to create palm oil plantations, is even occurring within a national park – somewhere where the rules means that a plantation cannot be given a licence. 2 new palm oil processing mills have sprung up near the deforesting concessions: keeping these supplied may well, now be driving further deforestation. Below is a 219 second documentary on this fascinating ecosystem.

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US has tightened African elephant trophy import rules but stops short of banning

Elephants hunting used to be a common activity. This was banned in Kenya in 1973 and in Botswana in 2014. The trade in Elephant parts was banned in 1989.

For many years, however, conservationists have called for rich countries to ban imports of hunting trophies on a country by country basis. This is for a simple reason – a reserve like the Kruger, has a real issue with a growing elephant population, yet at the same time Nigeria has only 400 elephants left. Tanzania has seen a reduction of elephants of 63%, while Mozambique has seen a reduction of 34%.

This new ruling suggests that imports are only allowed from populations which are large enough to support the loss. Now, I would be interested as to how this is worked out. For instance, could I buy a tiny parcel of land, on the edge of a large reserve, and allow any elephants that step on my land to be hunted?

  • Somewhere like the Selous game reserve, would in theory be acceptable for elephant hunting. If we go back to the 1976 there were approaching 109,000 elephants. However that population is now thought to be around 13,000 – hunting should be banned until the population has recovered. If a hunting reserve cannot afford to police well enough to eliminate poaching, it should not be allowed to hunt (the number of poached and hunted elephants must be below safety levels.
  • The Serengeti ecosystem also does not have a large elephant populatino so cannot allow hunting
  • The African forest elephant is considered critically endangered, so none of these elephants should be hunted

 

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Could Bison allow the land to reduce air pollution? – Yes

A small herd of 170 bison, released into a 20 square miles area of Tarcu mountains in Romania, are estimated to allow the land to capture 59,000 tones of carbon each year.

Big animals like this, stimulate the soil and plant growth, allowing the soil and plant growth to take up far more carbon than without them. Although Romania is one of the wildest countries in Europe, the European Bison was lost around 200 years ago. Between 2014 and 2021, 100 bison were reintroduced into the area, and that population has naturally grown such that there are now 170.

Scientists estimate that the lands carbon storing potential is as much as 10 times greater with the bison (they suggest that it is between 5 and 15 times more carbon.

Continue reading “Could Bison allow the land to reduce air pollution? – Yes”
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Analysis has found that 1/3 of land set aside for restoration is worse than before in Australia

Large parts of Australia look like the above photo, beautiful in a rugged way, but quite useless for the survival of many of Australia species. Australia has a wide range of habitats, which means that there are many areas which need to be protected.

The problem is, according to this study, declaring an area protected appears to be having little change on what is happened.

1/3 of all land that is set aside for restoration and conservation, has got worse rather than better. Given the fact that so many species are just hanging on to existence, this could be very bad news.

In one area that was studied, the majority of the area was cleared paddock – a serious problem for the koala and grey-headed flying fox which called the area home.

In particular, the idea of this scheme is so called biodiversity offsetting – if you are to clear wildlife habitat, you protect a similar sized area elsewhere.

Continue reading “Analysis has found that 1/3 of land set aside for restoration is worse than before in Australia”
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Deforestation in Columbia has fallen 36% in a year

Rainforest is essential if we are to combat climate change. Therefore every fall in deforestation is fantastic news.

Of course, it should be noticed, that this is still a loss of 792 square km of forest from the year before – we need to reach zero forest lost per year, but every step towards this target is positive.

The former higher rate of deforestation has its roots in the chaos caused by the fall of the largest guerrilla group the Farc, which disbanded in 2017.

Columbia is considered the second most biodiverse, is fighting to be a leader in the fight against climate change. Of course, this needs to continue to fall, and indeed have large areas replanted, if we are to avoid much of the climate change, but one step at a time

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The island where the feral species is an elephant

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.

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Might the solution to deforestation be education? probably not everywhere, but clearly here in Sumatra

Camp Granit – Sumatran rainforest (not the same place)

There is a variety of different causes for deforestation. However, the majority of the work is usually done by individuals – often for subsistence farming, though often the land is only fertile for a short period of time, requiring more rainforest to be cut down.

However, if people on the ground know that cutting down the rainforest will make life worse, then they will not do it.

Efron Simanjuntak (click here to see a photo in a new window) was once a successful logger (illegally) in Sumatra. In 2017 he was caught, and in 2018 he was imprisoned for 2 years. In these two years, he had a lot of time to think, and realized the damage that he was doing.

Continue reading “Might the solution to deforestation be education? probably not everywhere, but clearly here in Sumatra”
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