F Rosa Rubicondior: Conservation
Showing posts with label Conservation. Show all posts
Showing posts with label Conservation. Show all posts

Saturday 30 September 2023

Extinction News - How Britain is Exterminating its Wildlife - And What is to be Done


Norfolk damsel fly, Now extinct in UK.

One in six UK species threatened with extinction – here's what we could lose (plus how to save them)

One of the great crimes of the Abrahamic religions is the allegedly 'God-given' dominion over the entire planet Earth, its wildlife, its mineral wealth and its land and sea to humankind, to be treated as free and there for the sole benefit of humankind with no other purpose.

In the British Isles this has resulted in a landscape dominated by towns and cities, agriculture and monoclonal forestry, and coastal waters where anything edible is hoovered up and consumed, leaving, in many cases, stocks too small and immature, or too scarce to maintain a stable population, let alone recover.

And our waste in the form of single-use plastics, sewerage, industrial waste such as CO2 and heavy metals, agricultural run-off containing artificial fertilisers, have polluted and destroyed many waterways. Agricultural monocultures have produced virtual deserts, so far as many species are concerned and destroyed soil structure with over-use of pesticides and artificial fertilisers has led, in a few years, to loss of precious topsoil that took hundreds of thousands of years to create and ploughed-up water-meadows have gone, taking their biodiversity with them.

Consequently, our wild bird, wild mammal, insect and wild plant populations have been in steep and accelerating decline for most of the last two centuries.

According to the following report, we are now faced with the extinction of 1,500 of our 10,000 species. The report, "State of Nature" is the result of a collaboration between a large number of British and Irish conservation and wildlife charities. It can be read here:
The State of Nature report referred to in the article may be read here:

Sunday 26 February 2023

Conservation News - Why 'Extinct In The Wild' is Not Always a Death Sentence

Conservation News

Why 'Extinct In The Wild' is Not Always a Death Sentence
The Socorro Dove, Zenaida graysoni
© Josep del Hoyo
Macaulay Library

Painting of a passenger pigeon on red oak, 1754
1754 painting of a passenger pigeon.
(Plate 23 in Volume 1 of The Natural History of Carolina, Florida and Bahamas)

The animals and plants that only exist in captivity – and why time is running out to restore them to the wild

In southern Ontario, Canada, in 1866, a flock of migrating passenger pigeons, was estimated to be 1.5 Km (.93 miles) wide and 500 Km (310 miles) long. It took 14 hours to pass and contained an estimated 3.5 billion birds. The passenger pigeon was then probably the most abundant species of bird on Earth and certainly in North America.

On September 1, 1914, at Cincinnati Zoo, less than 50 years later, 'Martha' the last known passenger pigeon died and the species became extinct. The species had been functionally extinct when the last male died some years earlier. Its death went unrecorded. The last wild passenger pigeon is believed to have been shot in 1901.

The extinction of this species was due entirely to human intervention, including hunting for cheap meat on a massive scale, deforestation and habitat destruction. Because of its habit of migrating in closely-packed flocks, a single shot could bring down several birds.
Shooting passenger pigeons, Louisiana, 1875
A passenger pigeon flock being hunted in Louisiana. From the ‘Illustrated Shooting and Dramatic News’, 1875.


A gene line that had taken 3.5 billion years to evolve was ended.

Wednesday 16 November 2022

Worldwide Plant Diversity - Interactive Map

International research team led by Göttingen University use advanced machine learning to model biodiversity - Georg-August-Universität Göttingen
Global distribution of plant species richness across the globe as predicted using the distribution 300,000 plant species across 830 regional floras worldwide.
An international research team has produced an online interactive map of plant diversity.

Sunday 24 October 2021

Evolution News - Observed Rapid Evolution in African Elephants

1 of 2
Female elephants in Gorongosa National Park in Mozambique evolved to be tuskless in response to intense hunting.
Credit: Joyce Poole/ElephantVoices. Source: Science
2 of 2
Elephants in Gorongosa National Park, Mozambique, declined by 90% during the 20-year civil war because of ivory poaching. This spurred the rapid evolution of tuskless females, such as this female Loxodonta africana.
Credit: ElephantVoices. Source: Science
Civil war drove these elephants to lose their tusks—through evolution | Science | AAAS

Since evolution by natural selection is driven primarily by the selecting environment, rapid change in the environment can produce rapid evolution. If the selection pressure is strong enough, this intense selection can also result in a linked deleterious gene increasing in the population by being dragged up the fitness landscape by a strongly advantageous gene to which it is linked by close proximity on a chromosome.

This was the case in Mozambique, where during a 15-year-long civil war when there was intense poaching of elephants for their ivory to finance the armies of both sides and because any wild-life protection was largely absent or non-functional. In the Gorongosa National Park for example, the elephant population fell by 90% in 20 years with predation heavily selecting against those with tusks. Consequently, the gene for tusklessness in females increased in the population. Over a period of 28 years which included the 15 years of civil war, the proportion of tuskless females increased from 18.5% (n = 52) to 50.9% (n = 108), but so did the proportion of females in the population and the pre-term deaths of male calves!

This was due to an increase in the genes AMELX and MEP1a, which are associated in mammals with normal tooth formation. AMELX is linked by its proximity on the X chromosome to a dominant male-lethal syndrome in humans that also diminishes the growth of maxillary lateral incisors (homologous to elephant tusks). In other words, as AMELX increases in the population, so does a male-lethal gene that also reduces the growth of tusks in elephants. The result is an absolute increase in the proportion of live births of females and of tuskless females in particular.

In the abstract to their recent paper, a team led by Princeton scientists Shane C. Campbell-Staton of the Department of Ecology and Evolutionary Biology and Brian J. Arnold of Department of Computer Science, Princeton University, Princeton, NJ 08540, USA. said:
Abstract

Understanding the evolutionary consequences of wildlife exploitation is increasingly important as harvesting becomes more efficient. We examined the impacts of ivory poaching during the Mozambican Civil War (1977 to 1992) on the evolution of African savanna elephants (Loxodonta africana) in Gorongosa National Park. Poaching resulted in strong selection that favored tusklessness amid a rapid population decline. Survey data revealed tusk-inheritance patterns consistent with an X chromosome–linked dominant, male-lethal trait. Whole-genome scans implicated two candidate genes with known roles in mammalian tooth development (AMELX and MEP1a), including the formation of enamel, dentin, cementum, and the periodontium. One of these loci (AMELX) is associated with an X-linked dominant, male-lethal syndrome in humans that diminishes the growth of maxillary lateral incisors (homologous to elephant tusks). This study provides evidence for rapid, poaching-mediated selection for the loss of a prominent anatomical trait in a keystone species.
Over the short term, this attrition of males is not overly detrimental to elephants because herds are matriarchal with a single male able to serve multiple females and 'spare' males forming non-breeding 'batchelor' herds, so the population can remain stable or even increase with relatively few males.

What we can observe in this population then is a rapid evolution of a strong advantageous gene, in that tusklessness makes females less likely to be poached, with the 'opportunistic' increase in a deleterious gene which kills pre-term male calves by being linked physically to a strongly advantageous one, the deleterious effect in the population being more than compensated for by the overall advantageous effect.

Over the longer term, and with control of poaching, whatever environmental pressures led to the evolution of tusks in females originally is likely to reassert itself and the balance should shift back towards tusked females and more male live births. An beautiful example of how a changing environment changes the meaning of the same genetic information without any change in that information itself. And no magic deities involved anywhere in that process.

Wednesday 24 March 2021

Biodiversity News - A New Species of Chameleon From Ethiopia

1 / 8
The new chameleon species, Trioceros wolfgangboehmei
Credit: Koppetsch et al.
2 / 8
Living individual of Trioceros wolfgangboehmei
Credit: Koppetsch et al.
3 / 8
Head detail of the new chameleon, Trioceros wolfgangboehmei
Credit: Koppetsch et al.
4 / 8
Harenna Forest, Bale Mountains, Ethiopia.
5 / 8
View from the deck of Bale Mountain Lodge
6 / 8
Lateral detail of a living Trioceros wolfgangboehmei sp. nov. from Goba, Ethiopia, showing the heterogeneous body scalation with both small scattered tubercles and enlarged flattened plate-like scales. In this individual the dorsolateral stripe is interrupted and forms a Y-shaped pattern on the flanks.
Photo by Petr Nečas.
7 / 8
Living juvenile of Trioceros wolfgangboehmei sp. nov. from Goba, Ethiopia.
Photo by Petr Nečas.
8 / 8
Digital elevation map of Ethiopia (generated by using the geographic information system ArcGIS 10.0; elevation in m a.s.l) indicating the currently known distribution of Trioceros wolfgangboehmei sp. nov. east of the Ethiopian Rift in the northern Bale Mountains (red stars; left star: Dinsho, right star: Goba). Black star: Addis Abeba. Grey dots show records of T. affinis based on distributional data after Largen and Spawls (2010) and Ceccarelli et al. (2014).
Highlands of diversity: Another new chameleon from the Bale region, Ethiopia | Pensoft blog

Here is another example of why fragile and vulnerable habitats need to be preserved, if only for the rich variety of new species that could be living there.

This time it is a new species of chameleon from the Bale Mountain forests of Ethiopia. This one was discovered by zoologists Thore Koppetsch and Benjamin Wipfler of the Research Museum Alexander Koenig in Bonn, Germany, and Petr Nečas from the Czech Republic. The new species, Trioceros wolfgangboehmei is a new small-sized chameleon living on the edge of the forest. Their findings were published in the open-access, peer-reviewed life science journal Zoosystematics and Evolution.

The Pensoft blog explains:

Monday 22 March 2021

Biodiversity News - 4 New Species of Lichen Found

Micarea stellaris is one of the recently described lichen species. The name refers to ´star´ and comes from intensely shining crystals that are visible when studying it in polarised light.
Scale bar 1 mm.
Vuria, the highest peak in the Taita Hills, reaches to over two Kilometres heigh. Land use has fragmented mountain forests.

Photo: Aannina Kantelinen
Montane cloud forest, Taita Hills, Kenya

Photo: Petri Pellikka
Ngongoni antilopes benefit from the tree cover destroyed by elephants during the dry spells as it increases grasslands in the dry savannah plains surrounding verdant Taita Hills.
Photo: Petri Pellikka
Four lichen species new to science discovered in Kenyan cloud forests | University of Helsinki

The fragility of Earth's biodiversity was highlighted a few days ago by news that researchers from the University of Helsinki Finnish Museum of Natural History, Luomus and the National Museums of Kenya, have recently discovered four new species of lichen, all of the Micrarea genus, growing in the mountain forests in Kenya's Taita Hills. This unique environment is under threat from increasing land use which is fragmenting the forests.

From the University of Helsinki news release:

Sunday 24 January 2021

Another Newly-Discovered Substance Shows Why Biodiversity is Important

Leaf-cutter ants
New antifungal compound from ant farms - American Chemical Society

Following close on my article a few days ago on the antibiotic found in the skin of an Australian toadlet and how this demonstrates the need to maintain a rich biodiversity if only for the resource of natural medicines yet to be discovered in nature, we have another example of an unlikely compound being found - within the nest of leaf-cutter ants.

This time, it's an antifungal compound, produced by bacteria that live on the attine ants (ants of the Atta genus of what are more commonly known as leaf-cutter ants that farm fungi on a substrate of moist chewed-up leaf matter). The ants use this antifungal compound, called attinimicin, to keep their crop and its substrate free from fungal parasites.

Saturday 16 January 2021

A Newly-Discovered Antibiotic Shows Why a Rich Biodiversity is Vital

Australian Western toadlet, Uperoleia mjobergii
Toadlet peptide transforms into a deadly weapon against bacteria | EMBL

Researchers at The European Molecular Biology Laboratory (EMBL), Heidelberg, Germany, together with colleagues from Technion - Israel Institute of Technology - have discovered a potential powerful new form of antibiotic - in the skin of an Australian Amphibian, the Western toadlet, Uperoleia mjobergii.

This discovery highlights the vital importance of maintaining a rich biodiversity on Earth because, if nothing else, we could be losing valuable sources of new medicines and antibiotics.

It consists of a polypeptide (a short chain of amino acids) that, when they come into contact with the cell membrane of a bacterium, change to become powerful bactericides. The researchers found that the peptide self-assembles into a unique fibrous structure, which via a sophisticated structural adaptation mechanism can change its form in the presence of bacteria to protect the toadlet from infections.

Tuesday 23 October 2018

Evolution News - Giant Mice Threaten Rare Seabirds

Tristan albatross Diomedea dabbenena
Gough Island restoration programme | RSPB

A very nice, even if worrying, example of evolution in progress was illustrated in a report by the RSPB on one of their programmes to protect the seabird population on remote South Atlantic Gough Island. The giant descendants of the house mice that were introduced accidentally to the island in the 19th century, have become predatory on the estimated more than eight million seabirds of twenty-three different species that nest there.

Gough Island is part of the UK Overseas Territory of Tristan da Cunha, and is the nest site of the critically endangered Tristan albatross, Diomedea dabbenena.

Thursday 8 October 2015

And God Gave Man Dominion...

Chernobyl after the explosion.
Long-term census data reveal abundant wildlife populations at Chernobyl: Current Biology

According to creationists, their magic invisible friend in the sky created everything on Earth for humans, then put them in charge of it, presumably, because it thought its creation needed managing.

So, on that basis, which should be worse for life on Earth, humans or radioactive contamination? Would nature be better off without humans or with humans running the show?

If the results of a survey of the wildlife around the Chernobyl nuclear reactor is a guide, human beings are far less nature-friendly than even nuclear contamination, and, when left alone, nature can be far more resilient than we might expect.

The Chernobyl nuclear reactor, now in Ukraine, then in the Ukraine SSR and under the direct authority of the Soviet Union, became notorious in 1986 when its reactor ran out of control, destroying the building it was housed in and spraying the surrounding area with

Monday 22 June 2015

Does God Hate Vultures Too?

Lappet-Faced Vulture, Torgos tracheliotus
Another Continental Vulture Crisis: Africa's Vultures Collapsing toward Extinction | Conservation Letters - Wiley Online Library.

With so many species in serious decline and under threat of imminent extinction, creationists and Intelligent Design hoaxers have some explaining to do. They at least owe it to their followers to explain why their creator god either intended this to happen or is powerless to prevent it. Admittedly, they will need to face up to some unpleasant realities to do so, but at least they'll know they aren't living a lie.

What they need to grasp is that their notion, it it were any good, would be applicable across the entire range of biological science, not just the cherry-picked pieces that make their dupes feel important or to provide easy, default answers to the parts that are hard to understand without learning basic science, putting aside

Friday 5 June 2015

Conservation, Ecosystems and Evolution 101

Conservation challenges of predator recovery - Conservation Letters

If anyone seriously doubts that evolution happens and can be seen to be happening, simply observing what happens when conservation measures inevitably change the ecosystem should convince them they are wrong.

The only way to retain a belief that evolution can't happen is to use the tried and tested creationist technique of simply ignoring the evidence and maintaining a belief at the expense of intellectual integrity.

Saturday 29 March 2014

If Only Noah Had Known About Evolution!

Noah's ark on the Mount Ararat, Simone de Myle 1570
Tree of bird life could solve Noah's Ark problem - life - 27 March 2014 - New Scientist

One of the many absurdities in the Noah's Ark myth, several more of which can be found in No Way Noah!, is the sheer impossibility of providing an ocean-going sea-worthy wooden boat large enough to house something like 19 million animals of all shapes and sizes, many of which require highly specialised environments, together with enough food, to last something over a year.

Creationist pseudo-scientists who make their living trying to explain away these absurdities have no option but to fall back on an almost equally absurd version of warp-speed evolution so they can reduce the numbers to mere few thousand from which all the species have evolved in the last few thousand years, apparently with no one noticing all the new species popping into existence every generation. We're expected not to notice that they also tell their credulous followers that evolution is impossible but holding two diametrically opposite views simultaneously has never been a problem for creationists.

Now scientists have suggested a way we could, should the need ever arise in the future to take the world's species into protective custody to prevent the extinction of life on Earth, whilst not needing to take a pair of every single species. What we would need to safeguard is the DNA of all different species, not in test-tubes but in living members of those species which are the most evolutionarily distinct. From these, we could, theoretically reconstruct other related species.

You could increase the amount of evolutionary diversity that is currently protected by 25 per cent by expanding the reserve system by 5 per cent.

Laura Pollock, University of Melbourne, Victoria, Australia
For example, we would not need to save a pair of every wild cat but nor would it work to save, say, lions, or tigers because these have close relatives, so most of their DNA would survive their extinction. What we need to do is to preserve the main limbs and major branches of the evolutionary tree of life rather than the terminal twigs. Losing a species which is closely related to several others, such as the lion, would merely remove a twig from the tree. Conserving an evolutionary distinct species with few living relatives however will conserve more of the DNA from further down the branch for the same effort.

The Zoological Society of London (ZSL) has been running the Edge of Existence Project since 2007. This seeks to identify key endangered and evolutionary unique species and to rank them into an order of priority for conservation. At the moment, effort tends to be concentrated on a few high-profile species, often at the expense of a higher priority species according to this ranking.

Now, Walter Jetz of Yale University has ranked the world's birds in terms of evolutionary distinctness using genetic data from 6500 of the 10,000 species combined with data on threats and population size to produce a list of just 100 priority species. He has also shown that concentrating on just 113 sites could conserve 60 percent of the most endangered evolutionary unique species.

Jetz has used the ranking to point to species that should be protected. For example, the highly distinct shore plover (Thinornis novaeseelandiae) lives only on the tiny Chatham Islands, near New Zealand. Just 250 are left. Focusing on plover habitat would preserve 14.46 million years of evolution for each 10,000 square kilometres conserved. In contrast, the ostrich is the 10th most distinct species, but as it has a large range only 0.05 million years would be preserved per unit area.

Andy Coghlan, Tree of bird life could solve Noah's Ark problem, New Scientist, 27 March 2014.

It's a beautiful irony that, had the Bible's authors had the least inkling of evolution or DNA and how it allows species to be arranged in a tree of life, they could have made their absurd tale just a little more plausible by explaining that Noah had reduced the number of species to conserve by doing just what conservationists are now doing. They would have had to explain how Noah had then reconstructed all the other species by careful bioengineering of course but at least their daft notion would have been just slightly less implausible.

Unfortunately, they had to try to force-fit the story into what little they knew and understood, and the prevailing superstition of the orthodoxy they were selling, and so ended up with a story so implausible that only children and scientifically illiterate, gullible adults could believe it.

'via Blog this'





submit to reddit




Income from ads will be donated to charities such as moderate centre-left groups, humanist, humanitarian and wildlife protection and welfare organisations.


Sunday 19 January 2014

Death and Elephants

Pachyderm politics and the powerful female - life - 07 January 2014 - New Scientist

To those who assume that humans are the only species with complex social systems complete with the system of ethics which makes this system work, the above article in New Scientist may come as something of a surprise.

To a creationist who believes humans are a special creation and that our morals were handed down to us by a magic creator, it will come as a shock and will need to be ignored or dismissed in some way to help overcome the inevitable cognitive dissonance.

Saturday 16 November 2013

Lincoln Fundamental

We had a nice couple of days in Lincoln and Boston, Lincolnshire on Thursday and Friday. I'll blog about Boston next but this is about Lincoln, especially Lincoln Cathedral and what we can learn from it.

First a little background:

The See of Lincoln was the seat of one of the most powerful bishops in the Middle Ages and was certainly the largest, stretching at one time from the Thames to the Humber. It was thus immensely rich feeding off the produce of the surrounding agriculture, which included a large share of England's medieval wool wealth as well as the produce of the fertile reclaimed fenlands.

The Cathedral is thus suitably impressive and sits atop a steep climb from the River Watham, which was

Wednesday 16 October 2013

God's Poachers

There is a lucrative market in religious memorabilia, statues of gods and saints, and dolls dressed up to look like someone's notion of what a first century Judean virgin would look like - a white European, obviously.

So when it comes to choosing a material to make these little baubles out of, naturally it has to be expensive, and white because spending a lot on them shows piety, and obviously gods and saints and Judean virgins were all white. So what better than ivory?

You can see lots of these beautiful religious artifacts photographed by the photojournalist Brent Stirton here and here. Brent has investigated the links between religion and the ivory trade. Don't worry, Christians! It's not just you. Buddhists, Hindus and Shintoists are equally guilty, and equally racist, it seems.

To get the ivory, poachers slaughter elephants in Africa, where it is illegal in most countries. They frequently slaughter game wardens and police too. You can contrast these beautiful religious carvings with the work done by those who supply that raw materials here. I've shown a small sample below.


It's nice to see that worshiping a creator god makes people keen to care for its creation... though not at the expense of ostentatious displays of piety, obviously.

Brent Stirton's photographs won him this year's Wildlife Photojournalist Award by Wildlife Photographer of the Year. Their exhibition can be seen in London's Natural History Museum, from 18 October 2013 until 23 March 2014.


Share
Twitter
StumbleUpon
Reddit
submit to reddit

Friday 18 November 2011

And Let Them Have Dominion... Again

Genesis 1:26 And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth. (KJV Bible)

Photograph Kim Cheung/AP
Seized rhino horns in Hong Kong

Customs officers seized a total of 33 unmanifested rhino horns, 758 ivory chopsticks and 127 ivory bracelets, worth about HK$17m ($2.23m), inside a container shipped from Cape Town, South Africa


Friday 4 November 2011

And Let Them Have Dominion...

Genesis 1:26 And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth. (KJV Bible)

Photograph: Martin Harvey/WWF International
The white rhino Ceratotherium simum. Killed by poachers for its horn and fuelled by demand from Vietnam,
rhino poaching in South Africa shows no signs of abating, with a record 341 killed there this year to date.
Web Analytics