Author Archives: rdmyers75@hotmail.com

election hacking

Looking for the declassified report on Russian election hacking. Look no further. Here are a couple juicy phrases from the whopping 25 page report:

We assess Russian President Vladimir Putin ordered an influence campaign in 2016 aimed at the US presidential election. Russia’s goals were to undermine public faith in the US democratic process, denigrate Secretary Clinton, and harm her electability and potential presidency. We further assess Putin and the Russian Government developed a clear preference for President-elect Trump. We have high confidence in these judgments.

We also assess Putin and the Russian Government aspired to help President-elect Trump’s election chances when possible by discrediting Secretary Clinton and publicly contrasting her unfavorably to him. All three agencies agree with this judgment. CIA and FBI have high confidence in this judgment; NSA has moderate confidence…

Russian intelligence obtained and maintained access to elements of multiple US state or local electoral boards. DHS assesses that the types of systems Russian actors targeted or compromised were not involved in vote tallying.

I agree with Trump on virtually nothing, but I agree with him on one thing. These are the same people who brought us weapons of mass destruction. Which will always undermine their credibility in my eyes, along with the President, the State Department, Congress and the New York Times. I was a naive, trusting, patriotic young adult when I figured out that I had been lied to by basically all the branches of government and the media I trusted to keep an eye on them. And that was long before I read Legacy of Ashes and realized just how pathetic the CIA is and just how good the KGB is and always has been. And of course, that is who we are dealing with here.

Meddling in another sovereign country’s elections is one the worst things a country could do, right? Certainly the greatest democracy in the world, let alone the greatest democracy in the history of the world, would never do that, right? Well, the CIA isn’t good at spying, which is why the U.S. lost the Korean War, the Vietnam War, the Afghanistan War, and the Iraq War. They never really understood the motivations of the Soviet Union because they had no real intelligence on it whatsoever, whereas the KGB infiltrated the U.S. government at the highest levels all along. But the CIA was always actually pretty good at influencing elections and they have done it often, sometimes with and sometimes without the knowledge of the President and Congress.

Here’s an article about the U.S. and Russia meddling in elections around the world. So I don’t like the fact that the Russians meddled in our election, and I hate the outcome of the election, but there is some element of hypocrisy in our government expressing such moral outrage about it.

Partisan electoral interventions by the great powers: Introducing the PEIG Dataset

Six decades of rigorous scholarship have greatly increased our knowledge about the causes and effects of various military and non-military forms of foreign interventions.

One blind spot in the international relations (IR) literature on interventions has been interventions designed to affect election results in foreign countries; i.e. as most famously occurred in Italy’s 1948 parliamentary election and more recently in the 2009 Afghan presidential elections. Despite a few, very recent exceptions (Corstange and Marinov, 2012; Levin, 2016; Shulman and Bloom, 2012), such interventions have not been studied by quantitative IR scholars who have preferred to focus on more violent or usually more overt types of interventions.2

However by not studying partisan electoral interventions, quantitative IR scholars miss an important, common form of intervention. Between 1946 and 2000, the US and the Soviet Union/Russia have intervened in about one of every nine competitive national-level executive elections. Partisan electoral interventions have been found to have had significant effects on election results, frequently determining the identity of the winner (Levin, 2016). Overt interventions of this kind have also been found to have significant effects on the views of the target public toward the intervener (Corstange and Marinov, 2012). Some qualitative scholars who have studied particular cases of electoral interventions at times credit, or blame, them with playing an important role in the subsequent nature of the regime in the target country and influencing the direction of its domestic and foreign policies (Rabe, 2006: chap. 5; Trachtenberg, 1999: 128–132). With the growing realization among IR scholars of the importance of regime type (Huth and Allee, 2002; Park, 2013 Ray, 1995; Reiter and Stam, 1998; Russett, 1993) and, more recently, the nature of the leader in power (Chiozza and Choi, 2003; Colgan, 2013; Horowitz, 2014; Keller and Foster, 2010; Potter, 2007) for their countries’ foreign and domestic policies, electoral interventions are a factor that cannot be ignored.

EIA Annual Energy Outlook 2017

The U.S. Energy Information Administration has released its annual energy outlook 2017. In their economic modeling exercises, some of the interesting things that happen are that oil demand stays relatively flat, natural gas demand continues to grow, coal continues to fall, and renewables continue to grow through 2040 although they don’t reach a higher share of the total supply than natural gas or oil. Carbon emissions fall or stay relatively flat in most scenarios, which is interesting but remember that flat emissions that are still too high will cause atmospheric greenhouse gases to continue growing at a steady rate. Some of the most interesting graphs are emissions intensity per dollar of economic output and emissions per unit of energy used, which both fall over time but again this does not guarantee that the atmosphere is healing itself, only becoming sicker at a slower rate.

Thomas More’s utopia

Here’s an interesting article on Thomas More’s utopia from the 1500s. He envisioned a series of economically specialized medium-scale cities (a couple hundred thousand people, keeping in mind a million-person city was enormous at the time and there were only a few in the world) separated by farm and natural lands and connected by transportation links.

2016 in Review

Each month this year, I picked three scary, three hopeful, and three interesting posts or groups of post from the month. Now I’m going to pick one of those three to represent each of the months. The choices are fairly arbitrary and the main point is just to review what the media was saying and what I was thinking about over the course of the year. Then I’ll see if I can identify any trends or come up with any insights.

Most Frightening Stories of the Year

  • JANUARY: Paul Ehrlich is still worried about population. 82% of scientists agree.
  • FEBRUARY: 77% of jobs in China may be threatened by automation.
  • MARCH: An IMF official uttered the words “economic derailment“. That sounds like it could be a real train wreck. Meanwhile Robert Gordon has expanded his pessimistic article on future growth into a book.
  • APRIL: Robert Paxton says Trump is pretty much a fascist. Although conditions are different and he doesn’t believe everything the fascists believed. Umberto Eco once said that fascists don’t believe anything, they will say anything and then what they do once in office has nothing to do with what they said.
  • MAY: The situation in Venezuela may be a preview of what the collapse of a modern country looks like.
  • JUNE: Trump may very well have organized crime links. And Moody’s says that if he gets elected and manages to do the things he says, it could crash the economy.
  • JULY: The CIA is just not that good at spying.
  • AUGUST: A former U.S. secretary of defense thinks the risk of nuclear war is higher now than during the cold war. The Republic Party platform appears to be outright in favor of nuclear weapons, while the Democratic Party platform includes a tepid commitment to maybe “reducing reliance” and spending on nuclear weapons. Jeffrey Sachs says the Syria War has become essentially a U.S.-Russia proxy war.
  • SEPTEMBER: The ecological footprint situation is not looking too promising: “from 1993 to 2009…while the human population has increased by 23% and the world economy has grown 153%, the human footprint has increased by just 9%. Still, 75% the planet’s land surface is experiencing measurable human pressures. Moreover, pressures are perversely intense, widespread and rapidly intensifying in places with high biodiversity.” Meanwhile, as of 2002 “we appropriate over 40% of the net primary productivity (the green material) produced on Earth each year (Vitousek et al. 1986, Rojstaczer et al. 2001). We consume 35% of the productivity of the oceanic shelf (Pauly and Christensen 1995), and we use 60% of freshwater run-off (Postel et al. 1996). The unprecedented escalation in both human population and consumption in the 20th century has resulted in environmental crises never before encountered in the history of humankind and the world (McNeill 2000). E. O. Wilson (2002) claims it would now take four Earths to meet the consumption demands of the current human population, if every human consumed at the level of the average US inhabitant.” And finally, 30% of African elephants have been lost in the last 7 years.
  • OCTOBER: According to James Hansen, the world needs “negative” greenhouse gas emissions right away, meaning an end to fossil fuel burning and improvements to agriculture, forestry, and soil conservation practices to absorb carbon. Part of the current problem is unexpected and unexplained increases in methane concentrations in the atmosphere.
  • NOVEMBER: Is there really any doubt what the most frightening story of November 2016 was? The United Nations Environment Program says we are on a track for 3 degrees C over pre-industrial temperatures, not the “less than 2” almost all serious people (a category that excludes 46% of U.S. voters, apparently) agree is needed. This story was released before the U.S. elected an immoral science denier as its leader. One theory is that our culture has lost all ability to separate fact from fiction. Perhaps states could take on more of a leadership role if the federal government is going to be immoral? Washington State voters considered a carbon tax that could have been a model for other states, and voted it down, in part because environmental groups didn’t like that it was revenue neutral. Adding insult to injury, WWF released its 2016 Living Planet Report, which along with more fun climate change info includes fun facts like 58% of all wild animals have disappeared. There is a 70-99% chance of a U.S. Southwest “mega-drought” lasting 35 years or longer this century. But don’t worry, this is only “if emissions of greenhouse gases remain unchecked”. Oh, and climate change is going to begin to strain the food supply worldwide, which is already strained by population, demand growth, and water resources depletion even without it.
  • DECEMBER: The geopolitical situation is not good. If Russia did hack the U.S. election, it wouldn’t be the first election they have hacked. The wars in Afghanistan and Iraq are not over, and the rest of the greater Middle East is increasingly a mess.

Most Hopeful Stories of the Year

Most Interesting Stories of the Year

  • JANUARY: The World Economic Forum focused on technology: “The possibilities of billions of people connected by mobile devices, with unprecedented processing power, storage capacity, and access to knowledge, are unlimited. And these possibilities will be multiplied by emerging technology breakthroughs in fields such as artificial intelligence, robotics, the Internet of Things, autonomous vehicles, 3-D printing, nanotechnology, biotechnology, materials science, energy storage, and quantum computing.”
  • FEBRUARY: Titanium dioxide is the reason Oreo filling is so white.
  • MARCH: Michael Pollan urged us to eat food. not too much. mostly psychedelic mushrooms.
  • APRIL: Genes can now be programmed just like circuits.
  • MAY: The world has about a billion dogs.
  • JUNE: Switzerland finished an enormous tunnel through the Alps that took 20 years to build.
  • JULY: I was a little side-tracked by U.S. Presidential politics. Nate Silver launched his general election site, putting the odds about 80-20 in favor of Hillary at the beginning of the month. The odds swung toward Trump over the course of the month as the two major party conventions took place (one in my backyard), but by the end of the month they were back to about 70-30 in favor of Hillary. During the month I mused about NAFTA, the fall of the Republic, the banana republic, The Art of the Deal, how to debate Trump, and Jon Stewart.
  • AUGUST: Here is a short video explaining the Fermi Paradox, which asks why there are no aliens. Meanwhile Russian astronomers are saying there might be aliens.
  • SEPTEMBER: Monsanto is trying to help honeybees (which seems good) by monkeying with RNA (which seems a little frightening). Yes, biotech is coming.
  • OCTOBER: Neil deGrasse Tyson says “we might expect to find as many as 100 alien civilizations in our galaxy communicating with radio waves right now.”
  • NOVEMBER: New technology can survey and create a 3D model of a room in seconds.
  • DECEMBER: According to Bill Gates, “new genome technologies are at the cusp of affecting us all in profound ways”. But an article in Nature says we should not be too hopeful about living much past 100.

And now for trends and insights…

Serious long-term threats related to population, food, water resources, natural capital depletion, biodiversity loss, and climate change. These are all inter-related. In past years I probably would have suggested that these threats are so likely and so consequential that we should focus nearly all our efforts on them. But things have changed a bit over the past year. Now it appears that we face dire short term threats as well in the form of serious geopolitical instability, risk of war and global economic stagnation. If you don’t deal with short term threats you might not be around to deal with the long term ones. And voters have chosen leaders in the past year who have no intention of dealing with the long term threats. They make no serious attempt to understand their nature or root causes. In fact, they don’t even acknowledge that the threats exist in many cases.

War. The possibility of war is certainly the biggest short-term threat we face. If we get through the next 4-8 years without a war between major powers or any sort of nuclear detonation, we will have to consider that a win. The greater Middle East from North Africa to Afghanistan is dangerously unstable, and the U.S. has already been drawn into a proxy war with Saudi Arabia and its allies on one side and Iran and Russia on the other side. And it appears that Russia may have played a direct role in influencing the U.S. election. An accidental clash between U.S. and Russian forces in Syria, Eastern Europe, or over the world’s oceans could be enough to set off a series of escalations and miscalculations that leads to a war nobody wants or stands to gain anything from. A naval confrontation between the U.S. and China could be a similar risk.

The Great Recession. Although the U.S. economy has picked up, the overall global growth and employment situation is deeply concerning. Rather than just a cyclical downturn, it may be a long term trend driven by demographics, debt, and underemployment caused by automation. The automation trend is going to be relentless. The 2007-8 financial crisis caused by excessive risk taking in the U.S. finance industry may just have been the straw that broke the camel’s back and made the long-term trends obvious, and another financial crisis that severe at a time of weakness might be the one the world doesn’t recover from. Our new U.S. leaders are already working with big business to roll back the necessary but still inadequate protections put in place after the ’07-8 crisis. Costs and risks imposed by climate change are not going to make the economy any better.

Technology. Technology brings us grave concern over the employment situation, but also great hope that we could see a long-term pickup in productivity, and therefore our overall wealth and quality of life. Of course, an increase in overall wealth and quality of life may help only a small slice of society if that society is structured to concentrate rather than share the wealth, and the leaders we have chosen in the U.S. for the next few years are clearly committed to the former. Extreme concentration of wealth could lead us eventually to a situation of such instability that the only outcomes are armed revolution in the streets or else absolute authoritarian control.

But let’s optimistically assume that our political system eventually comes up with a consensus on sharing the wealth. Now a higher rate of productivity growth (within ecological limits) would be good for everyone. In this world, people whose jobs are displaced by automation would be quickly retrained for new jobs, and they would be educated in the first place so that they are very flexible and adaptable to changing conditions. Over time, we could become so rich that we simply don’t have to work so much, and we could devote more of our time to leisure activities, learning for the sake of learning, the arts, civic and social activities, etc.

This might seem like a utopian vision, but it has happened in the past. People used to work incredibly long, hard hours to grow just enough food to survive, and they didn’t live all that long at that. Later people used to work long, hard hours in factories and sweat shops. Technology, cheap energy, and the wealth they have brought have made huge changes in working hours and life expectancy for most of us. With technology seemingly advancing all around us, the puzzle is why we aren’t seeing similarly spectacular advances today as we have seen in the past.

Advances like the tractor and electricity were enormous changes at the time of course. Maybe today’s technological advances, even though they seem impressive to us, simply aren’t as dramatic as these advances were in their time. That is the basic thesis of Robert Gordon, who I mention above. The World Economic Forum and Nouriel Roubini articles I mention above have good summaries of the advances we are seeing. Roubini categorizes them as:

  • ET (energy technologies, including new forms of fossil fuels such as shale gas and oil and alternative energy sources such as solar and wind, storage technologies, clean tech, and smart electric grids).
  • BT (biotechnologies, including genetic therapy, stem cell research, and the use of big data to reduce health-care costs radically and allow individuals to live much longer and healthier lives).
  • IT (information technologies, such as Web 2.0/3.0, social media, new apps, the Internet of Things, big data, cloud computing, artificial intelligence, and virtual reality devices).
  • MT (manufacturing technologies, such as robotics, automation, 3D printing, and personalized manufacturing).
  • FT (financial technologies that promise to revolutionize everything from payment systems to lending, insurance services and asset allocation).
  • DT (defense technologies, including the development of drones and other advanced weapon systems).

Roubini acknowledges the argument that these advances are not the equivalent of past advances, but also suggests that we may be in the lag phase between when technological advances happen and when they begin to have obvious effects on productivity. I think I said it pretty well in my post so I’ll repeat what I said:

Although the plow, the printing press, the steam engine, electricity, etc. were game changing, the game didn’t change as soon as they were invented. They had to catch on, infrastructure had to be built, resistance to change had to be overcome, and it took awhile. Each successive revolution happened faster though, which is why I am skeptical that this time is different… I think there is a lag, and it just hasn’t hit yet. If and when there is a sharp technology-driven surge in productivity, it doesn’t mean everything is going to instantly be great for everybody. As we produce more with less effort, there will be winners and losers, haves and have nots. And there will be a lag between when that starts and when it gets resolved. And just to beat a dead horse, we can’t just keep producing and consuming more forever unless we figure out a way to do that without growing our ecological footprint. And, we need to watch out for those defense technologies.

The information technology is all around us now, and the biotechnology is just starting to take off. 2017 could be the year when we have the same excitement in the popular imagination about biotech as we saw with the internet in the mid-1990s. Or maybe it will take a few years.

It is possible that our technology could advance so fast that ecological limits will cease to be relevant before they begin to exert a major drag force on our global economy and society. I don’t think it is safe to put all our eggs in that basket though. I am also saddened by the extreme and seemingly accelerating destruction of our planet’s ecosystems as we have known them throughout human history. We can try to preserve some of what is left, but even if we are successful it will be more like a museum or zoo recording what we used to have than a real, large-scale functioning planetary ecosystem.

There, I ended on a pretty pessimistic note. That’s how I feel at the moment. Not all stories have to have a happy ending. (This is exactly why King Lear is my favorite Shakespeare play, because the bad guys do bad things and get away with it, and sometimes real life is like that.) I just don’t want to get my hopes up about 2017. Come on 2017, maybe you will pleasantly surprise me.

Dodd-Frank

After the risk of war, and the existential but somewhat abstract long-term catastrophe of climate change, the scariest risk we might face in the next 4-8 years is a roll-back of the limited protections put in place against a repeat of the 2008 financial crisis, or something worse. Trump is appointing people who are likely to make that happen. If the world is not in Great Depression 2.0 already, this could usher it in. I think it is entirely possible the world has entered a long-term economic downward spiral masked by the usual noise of ups and downs. This is from the blog Baseline Scenario:

The Wall Street Journal has a profile up on Mike Crapo and Jeb Hensarling, the key committee chairs (likely in Crapo’s case) who will repeal or rewrite the Dodd-Frank Wall Street Reform and Consumer Protection Act. It’s clear that both are planning to roll back or dilute many of the provisions of Dodd-Frank, particularly those that protect consumers from toxic financial products and those that impose restrictions on banks (which, together, make up most of the act)…

Introductory economics, and particularly the competitive market model, can be seductive that way. The models are so simple, logical, and compelling that they seem to unlock a whole new way of seeing the world. And, arguably, they do: there are real insights you can gain from a working understanding of supply and demand curves.

The problem, however, is that the people who are most captivated by the first theorem of welfare economics (the one that says that competitive markets produce optimal outcomes) are often the least good at remembering the assumptions that don’t apply and the caveats that do apply in the real world. They forget that the power of a theory in the abstract bears no relationship to its accuracy in practice.

Roomba vs. weeds

There’s a new robot that can weed your garden.

The Tertill was designed to survive outdoors. The latest prototype uses four-wheel drive to navigate a variety of terrains unsupervised and inward-tilting wheels so the robot can grip surfaces and extricate itself when it drives onto rocks and into holes. The Tertill also relies on capacitive sensors, which help it avoid obstructions and understand when to activate its weed-whacker.

The mechanism functions without machine-vision software, which Franklin Robotics says is not yet robust enough to distinguish weeds from plants, at least not at an affordable price. When the Tertill rolls over a plant that is shorter than its one-inch-high bumper, it assumes the plant is a weed, activates its trimmer, and cuts it. It turns away from plants that are taller than its bumper, and from metal collars that should be installed to protect seedlings.

By the time the Tertill goes on sale—likely via a crowdfunding campaign—the robot will have two more garden-related capabilities. It will wirelessly transmit data about plant and soil health to owners’ smartphones, so they can improve their gardens, and it will repel foraging animals such as rabbits and squirrels by moving and making noise when they approach.

cheetahs: going…going…gone?

In today’s depressing conservation news, cheetahs are in serious trouble.

Led by Zoological Society of London (ZSL), Panthera and Wildlife Conservation Society (WCS), the study reveals that just 7,100 cheetahs remain globally, representing the best available estimate for the species to date. Furthermore, the cheetah has been driven out of 91% of its historic range. Asiatic cheetah populations have been hit hardest, with fewer than 50 individuals remaining in one isolated pocket of Iran…

To make matters worse, as one of the world’s most wide-ranging carnivores, 77% of the cheetah’s habitat falls outside of protected areas. Unrestricted by boundaries, the species’ wide-ranging movements weaken law enforcement protection and greatly amplify its vulnerability to human pressures. Indeed, largely due to pressures on wildlife and their habitat outside of protected areas, Zimbabwe’s cheetah population has plummeted from 1,200 to a maximum of 170 animals in just 16 years – representing an astonishing loss of 85% of the country’s cheetahs.

Scientists are now calling for an urgent paradigm shift in cheetah conservation, towards landscape-level efforts that transcend national borders and are coordinated by existing regional conservation strategies for the species. A holistic conservation approach, which incentivises protection of cheetahs by local communities and trans-national governments, alongside sustainable human-wildlife coexistence is paramount to the survival of the species.

So it’s habitat loss and the relentless expansion of the human footprint, again. Are Africans just particularly callous toward the loss of the natural world? No, Africa is just one of the last places a lot of the large, charismatic animals are left. We had them elsewhere, but we have long forgotten them. Solutions exist. But I am in a pessimistic mood right now so I don’t think this time will be different, the declines and collapses will just continue to come faster and be more obvious until maybe some things will be done, but most likely they will be too little, too late. Too little, too late, but better than nothing. How is that for a silver lining?

 

Yellowstone

David Quammen (author of one of my all-time favorite nonfiction books, The Song of the Dodo: Island Biogeography in an Age of Extinction) has a long article in National Geographic about Yellowstone National Park which touches on some of the same things.

The Greater Yellowstone Ecosystem is bigger than any other park complex in the lower 48 states. And size matters. A resonant study published in the journal Nature back in 1987, by a young ecologist named William Newmark, revealed that among 12 national parks and park complexes in the western United States, all except two had lost mammal species in the years since they had been established, but that Greater Yellowstone, as the largest, had lost fewer species than almost all others. Most of those local extinctions had resulted not from direct human persecution—as the wolves of Yellowstone had been persecuted to oblivion—but from the natural processes of extinction characteristic of islands: When habitat is constrained within a limited area, animal populations remain small, and small populations tend to wink out, over time, because of accidental factors such as disease, fire, hard weather, and bad luck. Greater Yellowstone had lost less of its mammal diversity by natural attrition than had small parks such as Zion, Bryce Canyon, and Mount Rainier. Its size, evidently, had served it well.

Newmark’s original work has been challenged in some particulars during the decades since, but its basic conclusion remains sound: Size matters. The size of the Yellowstone complex helped preserve big, fearsome, wide-ranging, combative animals such as the grizzly, each one of which demands a large territory. No other park in the lower 48, apart from Glacier National Park along Montana’s Canadian border, now supports robust populations of the three greatest living North American carnivores—the grizzly, the wolf, the mountain lion—as well as such other predaceous animals as the wolverine, the coyote, the bobcat, and the red fox. Yellowstone is our wildest park south of the border complex that includes Glacier, in part because it’s our biggest.

The other good thing about geographical bigness is that, besides giving space to large predators with broad territorial needs, it usually encompasses habitat diversity as well as sheer space, thereby sheltering a greater variety of creatures at all levels of size, living all modes of life.

Because I am interested in island biogeography and I like the idea of having seminal papers at my fingertips, I looked up the Newmark article mentioned above.

A land-bridge island perspective on mammalian extinctions in western North American parks
WILLIAM D. NEWMARK
Nature 325, 430 – 432 (29 January 1987); doi:10.1038/325430a0

In recent years, a number of authors have suggested several geometric principles for the design of nature reserves based upon the hypothesis that nature reserves are analogous to land-bridge islands. Land-bridge islands are islands that were formerly connected to the mainland and were created by a rise in the level of the ocean. Land-bridge islands are considered supersaturated with species in that the ratio of island to mainland species numbers is higher than expected from the area of the island. As a result, the rate of extinction should exceed the rate of colonization on a land-bridge island, resulting in a loss of species that is suggested to be related to the size and degree of isolation of the island. If nature reserves are considered to be similar to land-bridge islands, because most are slowly becoming isolated from their surroundings by habitat disturbance outside the reserves, several predictions follow. First, the total number of extinctions should exceed the total number of colonizations within a reserve; second, the number of extinctions should be inversely related to reserve size; and third, the number of extinctions should be directly related to reserve age. I report here that the natural post-establishment loss of mammalian species in 14 western North American national parks is consistent with these predictions of the land-bridge island hypothesis and that all but the largest western North American national parks are too small to retain an intact mammalian fauna.

It’s easy to get depressed. Even if we preserved a lot of big open spaces, left them completely alone, and there were no such thing as pollution or climate change, a smaller nature would still be a less healthy nature. The only silver lining is that if we had a really thorough knowledge of how the shapes of preserved lands and the connections between determine their ecosystem health, we could theoretically come up with land use policies and practices to produce the best possible ecosystem health in the remaining space available.

There is research going on in this area:

A simplified econet model for mapping and evaluating structural connectivity with particular attention of ecotones, small habitats, and barriers
Wei Houa, Marco Neubertb, Ulrich Walzc
Landscape and Urban Planning
Volume 160, April 2017, Pages 28–37

Small habitats and ecotones are recognized as key structures in preserving biodiversity and maintaining landscape connectivity. However, most analyses of landscape pattern have not fully accounted for these elements. This leads to an underestimation of the landscape heterogeneity, especially at the local scale. This research aims to evaluate the structural connectivity for a source habitat (i.e., forest) with particular consideration of the roles of ecotones, small habitats, and barriers. A multi-buffer mapping procedure based on vector data is applied on two comparative test sites for mapping ecological networks (econets) which are composed of forest patches, ecotones, corridors, small habitats, and barriers. On this basis, several indices are proposed for quantitative evaluation of structural connectivity of econets. The application of the indices show that our approach can be useful for analyzing econet connectivity and identifying the roles of critical landscape elements, for example the barriers’ effect on overall forest connectivity. Within an econet, ecotones function as extension of forest edges which can increase the intrapatch connectivity; small habitats play the role of stepping stones which can enhance interpatch connections among forest habitats. The proposed econet model provides a generalized illustration of landscape connectivity and can be used to compare and monitor forest pattern.

December 2016 in Review

3 most frightening stories

  • The climate situation is not good. Concerns about food continue to surface, including from Bjorn Lomborg.
  • The water resources situation is not good. Asia may be headed for serious water shortages. 100 million trees have died in California during the current drought there. Drought and fire in the U.S. Southeast are an increasing problem and the region is unprepared.
  • The geopolitical situation is not good. If Russia did hack the U.S. election, it wouldn’t be the first election they have hacked. The wars in Afghanistan and Iraq are not over, and the rest of the greater Middle East is increasingly a mess.

3 most hopeful stories

3 most interesting stories

  • Scientists can synthesize proteins that could be incorporated in silicon-based life.
  • According to Bill Gates, “new genome technologies are at the cusp of affecting us all in profound ways”. But an article in Nature says we should not be too hopeful about living much past 100.
  • Maybe fish are not as stupid as we thought.