Category: Environment

Picture parade one hundred and thirteen

Dan’s wonderful pictures keep on flowing.

(Last Sunday’s set is here.)

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The final set of six pictures in a week’s time.

You all take care out there!

Animal survival.

The wonderful way that animals have evolved to survive life on the go.

It is very easy to look at our wonderful domesticated dogs and forget that genetically they are still very much hunting dogs. Of all the dogs that we have had Dhalia seemed the most closely connected with those instincts, and she is still missed more than a year after she died. So much so that I’m going to republish part of the post that commemorated her life just after she died. Here it is:

Dhalia, as with so many other dogs, offered lasting lessons.
April 8th, 2014

Inevitably, as Jean and I went around our ‘stuff’ yesterday after burying Dhalia in the morning, there were moments of quiet contemplation and gentle discussion.  Interludes over a hot drink where we reflected on the special dog that she was.

Much has already been written in this place but there can’t be too many reminders for us quirky humans of how valuable are the qualities of trust and love given to us by our dogs.

We need reminding how dogs are so intuitive and can reach out to a stranger without a moment of hesitation.  As Jean described when recalling how she first came across Dhalia.

Dhalia - domesticated but still the wild dog shows through.
Dhalia – domesticated but still the wild dog shows through.

It was a Sunday around the middle of the month of September in the year 2005. My friend, Gwen, and I had set off for La Manga, a small fishing village three miles from San Carlos, Mexico.  As the trip would take us through areas of desolate desert and the day was forecast to be a sizzler, we left early. The purpose of the journey was to feed a pack of dogs that were living on the outskirts of La Manga. These wild dogs were gradually getting used to our presence and with the aid of a humane trap we had previously caught two of them, a small puppy and her mother. Those two dogs were at my home and were gradually becoming tame so that good homes could be found for them.

Half-way to our destination, we saw two dogs running by the side of the road.   It wasn’t unusual to see strays searching for road-kill. I stopped the car and prepared food and water for them. One dog took off almost immediately but the other just stood perfectly still looking intently at me. She was rail-thin and full of mange.  Her ears and chest were scabbed with blood, and I could see that previously she had had pups. Tentatively, I pushed the food towards her. She took a bite and sat on her haunches; her eyes never leaving mine. Then she lifted a paw and reached out to me. Immediately, I burst into tears and scooped her into my arms.  I carried her back to the car where she lay quietly in my lap whilst we went on to do our feeding.  She was bloody and very smelly. However, I didn’t care.

Dhalia was always a gentle dog.  One that would mix with any of the other dogs. A dog that loved people, of all types and ages.

Love and Trust - Grandson Morten hugging Dhalia.
Love and Trust – Grandson Morten hugging Dhalia, September 2013.

You can read the full post here.

The reason that my post from last year came to mind was as a result of a recent article on The Conversation blogsite. It was called Motion dazzle: spotting the patterns that help animals outsmart predators on the run and seemed ideal to share with all you good people who support this place.

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Motion dazzle: spotting the patterns that help animals outsmart predators on the run

Laura Kelley, University of Cambridge

Zebra are seen running at the Serengeti National Park in Tanzania Nov. 14, 2013. (U.S. Navy photo by Mass Communication Specialist 1st Class Eric Dietrich/Released)
Zebra are seen running at the Serengeti National Park in Tanzania Nov. 14, 2013. (U.S. Navy photo by Mass Communication Specialist 1st Class Eric Dietrich/Released)

Many animals use the colours and patterns on their bodies to help them blend into the background and avoid the attention of predators. But this strategy, crypsis, is far from perfect. As soon as the animal moves, the camouflage is broken, and it is much easier for a predator to see and catch it. So how do animals protect themselves when they’re on the move?

Researchers are exploring whether high-contrast patterns during motion, such as stripes and zigzags, may be distorting the predator’s perception of where the animal is going. But, as little is known about such “motion dazzle”, we have built an online game to help shed light on it.

Lessons from war

The idea is that it may be more effective for animals to focus on preventing capture, rather then preventing detection or recognition, is actually more than 100 years old. It was naturalist Abbott Thayer who suggested that high-contrast patterns may distort the perceived speed or direction of a moving object, making it harder to track and capture.

Such motion dazzle patterns were actually used in World War I and II, where some ships were painted with black and white geometric patterns in an attempt to reduce the number of successful torpedo attacks from submarines. However, due to many other factors affecting wartime naval losses, it is unclear whether motion dazzle patterns actually had the desired effect.

HMS Argus displaying a coat of dazzle camouflage in 1918. wikimedia

What about the natural world? Zebras have bold stripes, and scientists have debated the function of their patterns since Darwin’s time. A recent modelling study suggested that when zebras move, their stripes create contradictory signals about their direction of movement that is likely to confuse predators. There are potentially two visual illusions responsible for this, which could form the basis of motion dazzle effects: the wagon wheel effect and the barber pole illusion.

The wagon wheel effect is named after Western movies, where the wheels on wagons often appear to be moving backwards. This is because the visual system takes “snapshots” over time and links them to create a continuous scene, in the same manner as recording film. If a wheel spoke moves forward rapidly between sampling events, it will appear to have moved backwards as it will be misidentified as the following spoke.

The barber pole illusion (also known as the aperture effect) occurs because the moving stripes provide ambiguous information about the true direction of movement. These illusory effects produced by stripes could therefore lead to difficulties in judging the speed and movement of a moving target. However, the zebra study was entirely theoretical and didn’t test whether striped patterns actually affected the judgements of real observers.

Dazzle Bug

Surprisingly, the first experimental tests of the effectiveness of motion dazzle patterns weren’t carried out until recently. Some studies have shown that strikingly patterned targets can be more difficult to catch than targets with other patterns in studies using humans as “predators” playing touch screen computer games. However, other studies have found no clear advantage for motion dazzle patterns So although patterns can affect our perception of movement, it’s still not clear which are most effective at doing so.

Can you see the spider? Crypsis can be pretty effective – as long as you don’t move. J Kelley, Author provided

We are addressing the question of which patterns are best for avoiding predators during movement using Dazzle Bug – an online game that asks players to imagine themselves as a predator, trying to catch a moving bug as fast as possible. Each bug has a different body pattern as well as a random pattern of movement. Bugs with easy to catch patterns will disappear, whereas those that are particularly tricky to catch will survive ––just like in nature. Over time, the patterns on the bugs’ body will evolve so that they become harder to catch with each successive generation.

This citizen science project will allow us to see what patterns are most effective at evading capture. We can then use these results to look at what visual effects these patterns have, and to see whether these patterns match up with those found on real animals in the wild.

Our findings will offer insight into the role of stripes, which are common in many species. While these patterns may have evolved to confuse the visual perception of a predator, they may also be a result of other selection pressures, such as attracting a mate or regulating body temperature. If striped patterns survive and evolve in the game, this would provide strong evidence that these patterns do act to confuse human predators, perhaps by producing the illusions described above. As motion perception seems to be highly conserved across a wide range of populations, these illusions may occur for many other predators too.

If we find that patterns other than stripes – such as speckles, splotches or zigzags – are most effective in preventing capture, this then leads to new and interesting questions about how these patterns may act to confuse or mislead. Whatever the outcome, Dazzle Bug will provide insight into how bodily patterns may have evolved to help animals to survive life on the go.

The ConversationLaura Kelley, Research Fellow, University of Cambridge

This article was originally published on The Conversation. Read the original article.

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 The natural world is so incredibly interesting.

For safer, cheaper pest control, just add ants!

A very interesting report that recently appeared on Mother Nature Network (MNN).

We live in Josephine County here in Southern Oregon. Our next door neighbours to the East are Jackson County. Josephine and Jackson Counties share one very noble attribute: each is only one of just nine GMO-free counties in the entire United States of America.  Plus, as evidenced at our local Grants Pass Farmers’ Market every Saturday, the growing of organic fruit and vegetables is widespread in our county.  We feel very happy to have ended up in this part of America.

All of which makes a logical introduction to a report that appeared on MNN on September, 1st.  It is republished below.

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For safer, cheaper pest control, just add ants

Ants offer a surprisingly effective alternative to synthetic pesticides on crops ranging from cashews to sugar cane, according to a new review of more than 70 scientific studies.

By: Russell McLendon, September 1, 2015, 9:30 a.m.

Weaver ants can not only protect tree crops from pests, but may also benefit the quality of produce. (Photo: Rushen/Flickr)
Weaver ants can not only protect tree crops from pests, but may also benefit the quality of produce. (Photo: Rushen/Flickr)

Sometimes ants are pests, marching through our kitchens on an industrious quest for crumbs. But when faced with more serious pests — namely those that destroy crops on which people’s livelihoods depend — we can also use ants to our advantage.

Published in the Journal of Applied Ecology, a new research review suggests ants can control agricultural pests as efficiently as synthetic pesticides, with the bonus of being more cost-effective and generally safer. And since many pesticides pose a danger to helpful wildlife like birds, bees and spiders — not to mention humans — ants might be a key ally in feeding the planet’s booming human population.

The review covers more than 70 scientific studies on dozens of pest species that plague nine crop varieties in Africa, Southeast Asia and Australia. Because ants are organized as “superorganisms” — meaning the colony itself is like an organism, with individual ants acting as “cells” that can move around independently — they are uniquely capable of hunting down pests and then overwhelming them.

“Ants are great hunters and they work cooperatively,” says author Joachim Offenberg, a biologist at Aarhus University in Denmark, in a press release about the research. “When an ant finds its prey, it uses pheromones to summon help from other ants in the nest. By working together, they can subdue even large pests.”

Most studies in the review focused on weaver ants, a tropical genus of tree-dwelling ants that weave ball-shaped nests using leaves and larval silk. Since they live in the canopy of their host trees, near the fruit and flowers that need protection, weaver ants have a natural tendency to control pest populations in orchards.

A colony of weaver ants in India works on converting leaves into a nest. (Photo: Raghu Mohan/Flickr)
A colony of weaver ants in India works on converting leaves into a nest. (Photo: Raghu Mohan/Flickr)

In one three-year study, Australian cashew growers recorded yields 49 percent higher in trees guarded by weaver ants versus trees treated with synthetic chemicals. But higher yields were only part of the prize: The farmers also got higher-quality cashews from the trees with ants, resulting in a 71 percent higher net income.

Similar results were reported in mango orchards. While mango trees with ants had roughly the same yields as those with synthetic chemicals, the ants were cheaper — and the trees they inhabited grew higher-quality fruit. That led to a 73 percent higher net income compared with pesticide-treated trees. Not all crops had such dramatic results, but studies on more than 50 pests showed that ants can protect crops including cocoa, citrus and palm oil at least as effectively as pesticides.

“Although these are rare cases where the ants were superior to chemicals, many studies show that ants are just as efficient as chemical controls,” Offenberg says. “And of course ant technology is much cheaper than chemical pest control.”

To recruit weaver ants in their orchards, farmers just collect nests from the wild, hang them in plastic bags from tree branches and feed them a sugar solution while they build new nests. Once the ants establish their colony, farmers can help them expand by connecting target trees with aerial walkways made from string or vines.

The ants are mostly self-sufficient from there, needing only some water during the dry season — provided via plastic bottles in the trees — and pruning of non-target trees that host different ant colonies to prevent fights. Farmers can also help their ants by avoiding broad-spectrum insecticide sprays, researchers say.

Ants protect mango trees about as effectively as pesticides, but at less cost, research suggests. (Photo: Shutterstock)

It’s worth noting that ants can also be detrimental to some plants, such as when they herd sap-feeding insects like aphids and leafhoppers. But if they still fend off fruit-ruining flies and beetles, their net impact may be positive nonetheless. Not only do weaver ants kill pest insects on their trees, but their presence alone is reportedly enough to scare away marauders as large as snakes and fruit bats. And research suggests their urine even contains important plant nutrients.

The use of ants for pest control isn’t new. As early as 300 B.C., Chinese farmers could buy weaver ants in markets to release in their citrus groves, a practice that has faded over time, especially after the advent of chemical pesticides. But it may be coming back, both because ants are cheaper than pesticides and because certified organic produce can fetch higher prices, due to concerns that broad-spectrum pesticides harm more than just pests. Aarhus University is studying the use of weaver ants as pest control in Benin and Tanzania, for example, where the insects could lead to increased export revenue of $120 million and $65 million, respectively.

“To kill the flies with pesticides, you have to make the mango so poisonous that it can kill the maggot,” Aarhus University biologist Mogens Gissel Nielsen told China’s Xinhua news agency in 2010. “But when it is too poisoned for the maggot to eat, it might not be good for us to eat either.”

While the research in Offenberg’s review focused largely on weaver ants, he points out they “share beneficial traits with almost 13,000 other ant species, and are unlikely to be unique in their properties as control agents.” Lots of ants nest in the ground, and while it may be a challenge to relocate them, they too have shown promise in protecting a variety of commercially important crops.

“Weaver ants need a canopy for their nests, so they are limited to plantations and forestry in the tropics,” Offenberg says. “But ground-living ants can be used in crops such as maize and sugar cane. European wood ants are renowned for controlling pests in forestry, and new projects are trying to use wood ants to control winter moths in apple orchards. Ants could even be used to fight plant pathogens because they produce antibiotics to combat diseases in their dense societies.”

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As with many of the other fine articles that appear on Mother Nature Network, this report by Russell McLendon has many links to other information sources, too many for me to set up. So if this report ‘speaks’ to you and you want to look up the background information then please go here and read it over on MNN.

 

Picture parade one hundred and twelve

Yet another group of those wonderful photographs sent in by Dan Gomez.

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There are still another twelve of these incredible pictures to share with you, in other words sufficient for two more picture parades.

Seeing the truth in our mirror.

A sombre reflection on the killing abilities of man.

I was in two minds as to whether to post this today for it is certainly a grim reminder of the less desirable aspects of our species.

In the end, I decided to so do because it needs to be shared and if it changes the mindset of just one person it will have been worthwhile. I was originally seen by me on the EarthSky blogsite.

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Want to see Earth’s super predator? Look in the mirror.

Our efficient killing technologies have given rise to the human super predator. Our impacts are as extreme as our behavior, says study.

Rope trawl for midwater trawling. Photo credit: NOAA
Rope trawl for midwater trawling. Photo credit: NOAA

Extreme human predatory behavior is responsible for widespread wildlife extinctions, shrinking fish sizes and disruptions to global food chains, according to research published in the August 21 edition of the journal Science these are extreme outcomes that non-human predators seldom impose, according to the article.

Lead researcher Chris Darimont is a professor of geography at the University of Victoria. Darimont said:

Our wickedly efficient killing technology, global economic systems and resource management that prioritize short-term benefits to humanity have given rise to the human super predator. Our impacts are as extreme as our behavior and the planet bears the burden of our predatory dominance.

A coastal wolf is hunting salmon in British Columbia, Canada. Photo credit: Guillaume Mazille
A coastal wolf is hunting salmon in British Columbia, Canada. Photo credit: Guillaume Mazille

The team’s global analysis indicates that humans typically exploit adult fish populations at 14 times the rate than do marine predators. Humans also hunt and kill large land carnivores such as bears, wolves and lions at nine times the rate that these predatory animals kill each other in the wild.

Researchers noted that in some cases, dwindling species of predatory land carnivores are more aggressively hunted for trophies, due to the premium placed on rare prey.

The result of human activity on wildlife populations is far greater than natural predation. Research suggests that socio-political factors can explain why humans repeatedly overexploit. Technology explains how: Humans use advanced killing tools, cheap fossil fuel, and professional harvesters – like high-volume commercial fishing fleets – to overcome the defensive adaptations of prey.

Humanity also departs fundamentally from predation in nature by targeting adult quarry.Co-author Tom Reimchen is a biology professor at University of Victoria. He said:

Whereas predators primarily target the juveniles or ‘reproductive interest’ of populations, humans draw down the ‘reproductive capital’ by exploiting adult prey.

During four decades of fieldwork on Haida Gwaii, an archipelago on the northern coast of British Columbia, Reimchen looked at how human predators differ from other predators in nature. Reimchen’s predator-prey research revealed that predatory fish and diving birds overwhelmingly killed juvenile forms of freshwater fish. Collectively, 22 predator species took no more than five per cent of the adult fish each year. Nearby, Reimchen observed a stark contrast: fisheries exclusively targeted adult salmon, taking 50 per cent or more of the runs.

The authors conclude with an urgent call to reconsider the concept of “sustainable exploitation” in wildlife and fisheries management. A truly sustainable model, they argue, would mean cultivating cultural, economic and institutional change that places limits on human activities to more closely follow the behavior of natural predators. Darimont said:

We should be protecting our wildlife and marine assets as an investor would in a stock portfolio.

Enjoying EarthSky? Sign up for our free daily newsletter today!

Bottom line: According to research published in the August 21, 2015 edition of Science, extreme human predatory behavior is responsible for widespread wildlife extinctions, shrinking fish sizes and disruptions to global food chains.

Read more from the University of Victoria

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Chris Darimont really put his finger on the spot in my opinion when he was quoted,”We should be protecting our wildlife and marine assets as an investor would in a stock portfolio.”

Going to close today’s post by repeating what is presented on the Welcome page of Learning from Dogs, namely:

As man’s companion, protector and helper, history suggests that dogs were critically important in man achieving success as a hunter-gatherer. Dogs ‘teaching’ man to be so successful a hunter enabled evolution, some 20,000 years later, to farming, thence the long journey to modern man. But in the last, say 100 years, that farming spirit has become corrupted to the point where we see the planet’s plant and mineral resources as infinite. Mankind is close to the edge of extinction, literally and spiritually.

Dogs know better, much better! Time again for man to learn from dogs!

My argument rests!

Picture parade one hundred and eleven

Another wonderful set of those pictures sent to me by Dan Gomez.

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Aren’t they wonderful! Another set in a week’s time.

Playing in the rain

Two reasons to be joyful!

Our local weather reporting site is saying this:

[Friday] Tonight

Rain after 11pm. Areas of smoke before 11pm. Low around 60. West wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday

Rain likely before 11am, then a slight chance of showers after 11am. Partly sunny, with a high near 76. West wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

If that rain arrives it will break a spell of fifty days since we last had rain. So fingers, and toes, very tightly crossed.

The second reason to be joyful is demonstrated in the following video sent to me by Chris Snuggs.

Enjoy, and wherever you are have a wonderful wet weekend!

I’ll lead, you follow Mr Goose.

Stories like this are wonderful – more please!

This needs no further introduction from me other than to say that this gorgeous story is from Mother Nature Network.

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‘Lost’ goose follows pickup truck 6 miles to water

After a Canada goose started following his truck, forester Andre Bachman decided to lead it to a nearby lake — and to film a video out his window as the bird flew dutifully alongside.

By: Russell McLendon
August 20, 2015

If there’s a wild Canada goose following you, it often means you’re being chased angrily from a pond or harassed for bread crumbs. But as a new viral video illustrates, the famously surly birds can be surprisingly civil — even compliant.

Andre Bachman first realized a goose was tailing him as he drove along a gravel road in rural southwest Alberta. “The goose was flying above when it saw his truck and started flying beside him,” writes Reddit user Watchboy0, who posted a video of the encounter titled “A Canada Goose was following my dad in his truck.”

Curious why a goose would spontaneously follow a pickup truck, Bachman pulled over — as did the goose. He began filming with his smartphone as he stepped out to greet the goose, which was waddling nonchalantly toward him.

“Hi,” Bachman said. “What are you doing? Are you lost?”

The goose didn’t answer, aside from quiet honking. But its behavior spoke volumes, revealing a level of comfort with humans that suggests it may have been a pet at some point. Shooing it with “off you go, off you go” didn’t work, so Bachman decided to embrace the goose’s idea. Thinking it might need help finding water, he set out for Shining Bank Lake, which the CBC reports is about 10 kilometers (6 miles) away.

“Let’s go for a flight, OK?” he offered. As Bachman filmed through his truck window, he began driving and coaching the goose to follow. It started with a brisk trot — a pretty amusing sight on its own — and then flapped into flight, letting Bachman capture an endearing view of it flying alongside to the Beatles’ “Let It Be.”

A Canada goose flies alongside a pickup truck on its way to Alberta's Shining Bank Lake. (Photo: Andre Bachman/YouTube)
A Canada goose flies alongside a pickup truck on its way to Alberta’s Shining Bank Lake. (Photo: Andre Bachman/YouTube)

Bachman stopped at least once to check on the goose, saying “I almost hit you, didn’t I?” and noting its tameness when the bird let him pet it. As goose expert Sid Andrews of Inglewood Bird Sanctuary tells Canada’s Global News, even wild Canada geese accustomed to handouts rarely tolerate that.

“I would guess that because it allowed the fellow driving the truck to get very close, that at some point in time, it must have been imprinted on human beings,” Andrews says, adding that it also may have simply mistaken its reflection in the truck’s bumper for another goose. “It somehow got lost or estranged from the group and found, just by happenstance, another goose in the reflection in the bumper.”

Either way, the goose had little trouble keeping up. “My dad would just about stop for the corners after the first one to let it turn,” Watchboy0 writes on Reddit. “Also, at one point he wanted to see how fast it could go. At around 80 km/h [50 mph], the goose started flying above his truck on the air coming off his windshield.”

Once at the lake, the goose “seems happy and stays,” Bachman writes on YouTube, where the video has been watched more than 1.5 million times in about a week. The bird was probably never in serious distress, Andrews says, but Bachman may still have done it a favor by leading it to water. “I certainly would applaud [the driver’s] instincts to head to water because it’ll have a much better chance of finding food.”

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Well done that man: forester Andre Bachman. Well done, indeed!

Wild Dogs and Englishmen …

… go out in the mid-day sun!

Say the word ‘dog’ to me and my immediate thought would be of the domesticated animal, as I’m sure would be the first thought of thousands of others.

But our wonderful doggie companions came from the wild and in some countries wild dogs still are widely found. There was an article on the Mokolodi Nature Reserve blogsite in November, 2009 specifically about wild dogs, that included the following picture:

Wild hunting dogs drinking.
Wild hunting dogs drinking.

All of which is a wonderful reminder that wilderness is a critical and essential element in the overall health of our planet, and by extension, of ourselves.

The academic blogsite The Conversation yesterday published an article by William Lynn who is a Research Scientist in Ethics and Public Policy at Clark University. It proposes a wonderful way of keeping our populations of wild animals healthy and vibrant through rewilding.  It is republished here within the terms of The Conversation.

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Setting aside half the Earth for ‘rewilding’: the ethical dimension

August 26, 2015 5.50am EDT

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Wildlife corridors: four proposals to ‘rewild’ portions of North America. Smithsonian Institute, CC BY-NC

A much-anticipated book in conservation and natural science circles is EO Wilson’s Half-Earth: Our Planet’s Fight for Life, which is due early next year. It builds on his proposal to set aside half the Earth for the preservation of biodiversity.

The famous biologist and naturalist would do this by establishing huge biodiversity parks to protect, restore and connect habitats at a continental scale. Local people would be integrated into these parks as environmental educators, managers and rangers – a model drawn from existing large-scale conservation projects such as Area de Conservación Guanacaste (ACG) in northwestern Costa Rica.

The backdrop for this discussion is that we are in the sixth great extinction event in earth’s history. More species are being lost today than at any time since the end of the dinosaurs. There is no mystery as to why this is happening: it is a direct result of human depredations, habitat destruction, overpopulation, resource depletion, urban sprawl and climate change.

Wilson is one of the world’s premier natural scientists – an expert on ants, the father of island biogeography, apostle of the notion that humans share a bond with other species (biophilia) and a herald about the danger posed by extinction. On these and other matters he is also an eloquent writer, having written numerous books on biodiversity, science, and society. So when Wilson started to talk about half-Earth several years ago, people started to listen.

As a scholar of ethics and public policy with an interest in animals and the environment, I have been following the discussion of half-Earth for some time. I like the idea and think it is feasible. Yet it suffers from a major blind spot: a human-centric view on the value of life. Wilson’s entry into this debate, and his seeming evolution on matters of ethics, is an invitation to explore how people ought to live with each other, other animals and the natural world, particularly if vast tracts are set aside for wildlife.

The ethics of Wilson’s volte-face

I heard Wilson speak for the first time in Washington, DC in the early 2000s. At that talk, Wilson was resigned to the inevitable loss of much of the world’s biodiversity. So he advocated a global biodiversity survey that would sample and store the world’s biotic heritage. In this way, we might still benefit from biodiversity’s genetic information in terms of biomedical research, and perhaps, someday, revive an extinct species or two.

Not a bad idea in and of itself. Still, it was a drearily fatalistic speech, and one entirely devoid of any sense of moral responsibility to the world of nonhuman animals and nature.

What is striking about Wilson’s argument for half-Earth is not the apparent about-face from cataloging biodiversity to restoring it. It is the moral dimension he attaches to it. In several interviews, he references the need for humanity to develop an ethic that cares about planetary life, and does not place the wants and needs of a single species (Homo sapiens sapiens) above the well-being of all other species.

people to consider the role of humans in nature. jene/flickr, CC BY-NC-ND
The half-earth proposal prompts people to consider the role of humans in nature. jene/flickr, CC BY-NC-ND

To my ear, this sounds great, but I am not exactly sure how far it goes. In the past, Wilson’s discussions of conservation ethics appear to me clearly anthropocentric. They espouse the notion that we are exceptional creatures at the apex of evolution, the sole species that has intrinsic value in and of ourselves, and thus we are to be privileged above all other species.

In this view, we care about nature and biodiversity only because we care about ourselves. Nature is useful for us in the sense of resources and ecological services, but it has no value in and of itself. In ethics talk, people have intrinsic value while nature’s only value is what it can do for people – extrinsic value.

For example, in his 1993 book The Biophilia Hypothesis, Wilson argues for “the necessity of a robust and richly textured anthropocentric ethics apart from the issues of rights [for other animals or ecosystems] – one based on the hereditary needs of our own species. In addition to the well-documented utilitarian potential of wild species, the diversity of life has immense aesthetic and spiritual value.”

The passage indicates Wilson’s long-held view that biodiversity is important because of what it does for humanity, including the resources, beauty and spirituality people find in nature. It sidesteps questions of whether animals and the rest of nature have intrinsic value apart from human use.

His evolving position, as reflected in the half-Earth proposal, seems much more in tune with what ethicist call non-anthropocentrism – that humanity is simply one marvelous but no more special outcome of evolution; that other beings, species and/or ecosystems also have intrinsic value; and that there is no reason to automatically privilege us over the rest of life.

Consider this recent statement by Wilson:

What kind of a species are we that we treat the rest of life so cheaply? There are those who think that’s the destiny of Earth: we arrived, we’re humanizing the Earth, and it will be the destiny of Earth for us to wipe humans out and most of the rest of biodiversity. But I think the great majority of thoughtful people consider that a morally wrong position to take, and a very dangerous one.

The non-anthropocentric view does not deny that biodiversity and nature provide material, aesthetic and spiritual “resources.” Rather, it holds there is something more – that the community of life has value independent of the resources it provides humanity. Non-anthropocentric ethics requires, therefore, a more caring approach to people’s impact on the planet. Whether Wilson is really leaving anthropocentrism behind, time will tell. But for my part, I at least welcome his opening up possibilities to discuss less prejudicial views of animals and the rest of nature.

The 50% solution

It is interesting to note that half-Earth is not a new idea. In North America, the half-Earth concept first arose in the 1990s as a discussion about wilderness in the deep ecology movement. Various nonprofits that arose out of that movement continued to develop the idea, in particular the Wildlands Network, the Rewilding Institute and the Wild Foundation.

These organizations use a mix of conservation science, education and public policy initiatives to promote protecting and restoring continental-scale habitats and corridors, all with an eye to preserving the native flora and fauna of North America. One example is ongoing work to connect the Yellowstone to Yukon ecosystems along the spine of the Rocky Mountains.

Take it up a notch? The British Columbia Ministry of Transportation recently started to add signs warning motorists when they are likely to encounter wildlife. British Columbia Ministry of Transportation, CC BY-NC-ND
Take it up a notch? The British Columbia Ministry of Transportation recently started to add signs warning motorists when they are likely to encounter wildlife. British Columbia Ministry of Transportation, CC BY-NC-ND

When I was a graduate student, the term half-Earth had not yet been used, but the idea was in the air. My classmates and I referred to it as the “50% solution.” We chose this term because of the work of Reed Noss and Allen Cooperrider’s 1994 book, Savings Nature’s Legacy. Amongst other things, the book documents that, depending on the species and ecosystems in question, approximately 30% to 70% of the original habitats of the Earth would be necessary to sustain our planet’s biodiversity. So splitting the difference, we discussed the 50% solution to describe this need.

This leads directly into my third point. The engagement of Wilson and others with the idea of half-Earth and rewilding presupposes but does not fully articulate the need for an urban vision, one where cities are ecological, sustainable and resilient. Indeed, Wilson has yet to spell out what we do with the people and infrastructure that are not devoted to maintaining and teaching about his proposed biodiversity parks. This is not a criticism, but an urgent question for ongoing and creative thinking.

Humans are urbanizing like never before. Today, the majority of people live in cities, and by the end of the 21st century, over 90% of people will live in a metropolitan area. If we are to meet the compelling needs of human beings, we have to remake cities into sustainable and resilient “humanitats” that produce a good life.

Such a good life is not to be measured in simple gross domestic product or consumption, but rather in well-being – freedom, true equality, housing, health, education, recreation, meaningful work, community, sustainable energy, urban farming, green infrastructure, open space in the form of parks and refuges, contact with companion and wild animals, and a culture that values and respects the natural world.

To do all this in the context of saving half the Earth for its own sake is a tall order. Yet it is a challenge that we are up to if we have the will and ethical vision to value and coexist in a more-than-human world.

ooOOoo

I am sure many will agree that this is a very interesting idea and one that I hope is eventually adopted. For the sake of all our wild animals, including our dogs.

The greatest journey of them all

….. is the journey within.

Today’s video creates a small emotional break between the loss of our Lilly and returning to life as usual.

It was sent across to me by Dan Gomez. It is very compelling indeed.

Ara and Spirit travel across the country in their sidecar motorcycle and learn about some of life’s toughest lessons.