Guard dogs to save Namibian Cheetah?

While the Cheetah has suffered a horrific fall in range and numbers in the world over the last century, there are some hopes for the species.

Cheetah are not big cats- this means that they often struggle to thrive in small reserves alongside other big cats. What this has meant is that in many countries there are more cheetah outside reserves than inside reserves. This is primarily the case in Southern Africa, in particular Botswana, Namibia, South Africa and Zimbabwe where the most free ranging cheetah currently live. To a lesser extent, there are also free ranging cheetah in east Africa in Tanzania and Kenya.

Can the sheep dog be the solution to livestock losses from cheetah? A study in Namibia suggests it may
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Moon wobbles have been linked to mass mangrove tree deaths

Mangrove trees are essential in many parts of the world. Having been severely depleted in recent decades, the human race has realized their importance late, as ever. From stabilizing shore lines, and stopping excessive loss of sand into the sea, they also seive much of our pollution out of the water.

Mangrove forests are essential for a variety of reasons. We need them, to catch as much carbon as possible. They are also fantastic for sea defences, and (as you can see above) nature reserves
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Amazon Rainforest tipping point approaching?

Rainforests are incredible places, with a huge amount of wildlife and plants all living closely together and fighting for survival.

Now the problem in many parts of the world, rainforests are being cut down for space to be given over to all sorts of other land uses. I have no problem with some of the rainforests being cut down for other land uses. Unfortunately though in the Amazon, there is a significant issue.

If a tipping point is reached, cut down rainforest is not likely to be useful for growing crops, it is likely to transform into a dry savannah, incapable of supporting crops, it may turn into full desert.
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We’re all concentrating on saving rainforests: but will they survive?

Rainforests are essential for many different things. At the moment, we (as the human race) are concerned about rainforests for their capacity to store carbon – thereby reducing the amount in the atmosphere and therefore the threat of carbon dioxide causing the greenhouse effect.

Here, you can see what happens to land that is deforested. It is not good for the rainforest that survives either

The problem is, that even without cutting any more rainforests down, we have already changed the weather dramatically. If rainforests are cut down there may then not be enough rain to sustain regrowth. One example is the Amazon, where it is predicted that half its rainfall is caused by the forest itself.

In the Amazon, Congo and even south-east Asia, there are already worrying signs in particularly highly deforested areas, that the rainforest weather is drying, turning the forest into a more savannah like area.

What is clear, is that a fragmented rainforest is deeply threatened. We need large blocks of unbroken rainforest if the planet is to survive in a form that we will continue be good for the human race to continue to thrive within. Of course, this is also essential for the many planet services that the human race requires to keep going.

Of course, this is not a reason to be allowed to cut down the fragments, it is a reason to not create the fragments in the first place. What is important to realize, is that many of the activities that the rainforest is being cut down for, will not work without the rain that the forest creates.

Just food for thought

Jair Bolsonaro is trailing in the polls and is currently looking unlikely to win re-election – but undoing his damage might be difficult

In the run-up to the Brazilian election, we will be looking at what is happening in this country. While only the people of Brazil have a say, what they decide is likely to have a big effect on the rest of the world:

who will win? Will the Amazon and therefore the planet get a reprieve?

Re-election of Bolsonaro will likely mean the end of the Amazon functioning properly or they can go with a former politician – both have issues, but Lulu appears on the cusp of taking over, and if this happens it is predicted to have a fantastic impact on deforestation (though it would be hard for any change to not be dramatic).

Given the huge impact this election could have on the rest of the world, there seems to be little coverage, maybe this will change as the time draws near.

Thwaites or “doomsday” glacier is disintegrating faster than expected

The Thwaites glacier is an important glacier in western Antarctica. It is already thought to account for about 4% of global sea level rise. This glacier has suffered a rapid retreat from the land shelf in just 6 months – a process that can naturally take several centuries.

The bigger problem that Thwaites glacier currently brings, is the fact that this glacier seems to largely be the dam wall, holding much of the ice back. As a result, while Thwaites glacier can increase water levels by an alarming amount, a collapse is predicted to increase global sea levels by between 90cm and 300cm.

In other words, this glacier alone, with a full collapse, as much as 5% of the worlds population will have to move as their home will be under water. Unfortunately far more people may well find that their way of live is no longer possible.

Regular readers of this blog will remember me mentioning this not long ago, unfortunately the last 6 months has shown the situation to be far worse.

Should Jaguars have a place in the ecosystems of the continental north America?

Wild Jaguars are a native resident of the USA. Once roaming as far north as the Grand canyon, they roamed over around 1/3 of its lands. It is not a natural migration therefore that has therefore meant that Jaguars are extremely rare in the USA.

Currently there are about 173,000 Jaguars living in the wild, meaning that taken as a whole, the Jaguar is far away the safest of the big cats (Lions who come in second, have a population of around 20,000). However, if you look at the part of the Jaguar population that lives in north America, their position becomes far more precarious.

Currently, it is thought that Mexico contains a wild jaguar population of about 4800.

A map of current considered range of Jaguars in Mexico, with records over the last 20 years.
Credit: Ceballos G et al 2021
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Seeing the end of the Bolsonaro administration, destruction of the Amazon seems to have ramped up

With the Brazilian election to occur during October, and Jair Bolsonaro widely seen as a failure in many ways – as well as having favoured specific groups at the detriment of the rest of the population, it is considered highly unlikely that Jair Bolsonaro will get a second term.

While no president of Brazil has managed to halt deforestation, Jair Bolsonaro has actively fought against any protection that it enjoyed
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