Environmental News
Environmental News from Boulder, Colorado
CU study: Conservation efforts might encourage some to hunt lions
Aug 26th
Conventional wisdom holds that East Africa’s Maasai pastoralists hunt lions for two distinct reasons: to retaliate against lions that kill livestock or to engage in a cultural rite of passage. But that view reflects mistranslations of Maasai terms and a simplification of their cultural traditions and their relationship with wildlife, a team of researchers led by a University of Colorado Boulder geographer has concluded.
Further, some conservation initiatives including those designed to save lions from being hunted have either failed to work or in some cases appear to have incited Maasai to hunt more lions as a form of political protest, the researchers report.
Such nuances are important, because it’s harder to control the hunting of lions unless society knows precisely why lions are hunted, the researchers contend.
Many populations of Panthera leo—African lions—are falling, and the species is classified as “vulnerable” on the International Union for Conservation of Nature and Natural Resources’ Red List.
Lion hunting is outlawed in Kenya and in Tanzania is limited to mostly tourists hunting with permits, unless the hunt is to eliminate a lion in defense of life or livestock. Still, lion hunting regularly occurs in both countries, usually without the hunters’ following the law.
“We saw an inaccurate representation of the exact reasons for why Maasai hunt lions, and we had a lot of ethnographic background to correct that,” said Mara J. Goldman, the assistant professor of geography at CU-Boulder who led the study.
Goldman collaborated with Joana Roque de Pinho, a postdoctoral researcher at the Instituto Superior de Ciencias Sociais e Politicas (Universidade Técnica de Lisboa, Portugal), and Jennifer Perry, a CU-Boulder geography alumna now studying law at the university.
Goldman and her fellow researchers conducted 246 in-depth interviews of Tanzanian and Kenyan Maasai between 2004 and 2008. They found that Maasai hunt lions for multiple overlapping reasons, some relating to predation on livestock and some not.
In some cases, Maasai said they hunted lions to prevent the potential killing of livestock, especially by lions that had killed livestock before, rather than just as retaliation.
And while Maasai still celebrate successful lion hunts and the prowess of the warriors who hunt, that cultural tradition can be less of a motivation to hunt than political discontent.
In Kenya, for instance, conservation programs aim to curb Maasai lion hunting by financially compensating Maasai for livestock killed by lions. In Tanzania, suggestions have been made by some to start such ‘compensation’ programs, but the Maasai themselves explain why this strategy has limitations:
“We cannot agree (to compensation) because we do not have cattle to be killed every day,” an elder Maasai told the researchers. “If they pay money today, then tomorrow, they will pay every day because the lion will keep coming back to eat cattle until all the cattle are gone. And then what will we do with the money?”
These sentiments were expressed in a village bordering the Manyara Ranch, a Tanzanian conservation trust on which hunting is prohibited but over which Maasai from neighboring villages are meant to share governance. In the beginning, the elders kept the warriors from hunting lions, the researchers found.
But after Maasai representation in ranch governance was diminished, the Maasai felt disenfranchised. Lion hunting increased in frequency and severity and was no longer discouraged by elders, the researchers said.
“We have no reason to follow the rules,” one elder told the researchers.
Goldman researches human-environment relations with the Tanzanian and Kenyan Maasai, one of the most recognizable ethnic groups in Africa, known for their distinctive, colorful dress and social customs, and most recently for their lion-hunting practices.
Although the primary motivations for lion hunting differed somewhat between Tanzania and Kenya, the researchers emphasize that Maasai have multiple, overlapping reasons to hunt lions: to reaffirm the protective role of young warriors, to help select brave leaders among warrior groups, to allow individual warriors to gain prestige, to eliminate lions that prey on livestock and to prevent lions from becoming habituated to eating livestock and sometimes harming people.
The multiple reasons illustrate the limitations of explaining Maasai lion hunting “as either a cultural manhood ritual or a retaliatory act,” the researchers write.
“Participatory conservation interventions that respect Maasai knowledge and promote full engagement with management processes are likely to have far better success in persuading Maasai to change or moderate such behaviors themselves,” the research team states, adding that “lion conservation projects rarely address such complex politics.”
Goldman, also a faculty research associate at CU-Boulder’s Institute of Behavioral Science, is the first author on the study that was recently published online in the journal Oryx and is scheduled to appear in the journal’s October print edition. The study is available online at http://dx.doi.org/10.1017/S0030605312000907.
For more on this story, see Colorado Arts & Sciences Magazine at http://artsandsciences.colorado.edu/magazine.
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EPA honcha and Colo. senator discuss president’s climate plan
Aug 12th
EPA Administrator Gina McCarthy and
Sen. Mark Udall to speak at CU Law School on
President Obama’s Climate Action Plan
Sen. Mark Udall to speak at CU Law School on
President Obama’s Climate Action Plan
Recently appointed U.S. Environmental Protection Agency Administrator Gina McCarthy and Colorado Sen. Mark Udall will discuss President Obama’s Climate Action Plan at the University of Colorado Law School on Wednesday, Aug. 14.
The event also will include a panel discussion with former Colorado Gov. Bill Ritter, Colorado Oil and Gas Association President Tisha Schuller and Brad Udall, director of the law school’s Getches-Wilkinson Center for Natural Resources, Energy and the Environment.
The event will be held from 9 to 10:30 a.m. in the Wolf Law Building’s Wittemyer Courtroom on the CU-Boulder campus. The event is free and open to the public. Seating is limited in the courtroom; additional seats will be available in classrooms with a live video feed.
The event is co-sponsored by the Getches-Wilkinson Center and the EPA. The Getches-Wilkinson Center also will host its annual Clyde Martz Summer Water Conference on Aug. 15-16. For more information on the water conference visithttp://www.colorado.edu/law/research/gwc.
For more information on Colorado Law visit http://www.colorado.edu/law/.
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CU-Boulder team develops potential new hydrogen fuel technology
Aug 1st
A University of Colorado Boulder team has developed a radically new technique that uses the power of sunlight to efficiently split water into its components of hydrogen and oxygen, paving the way for the broad use of hydrogen as a clean, green fuel.
The CU-Boulder team has devised a solar-thermal system in which sunlight could be concentrated by a vast array of mirrors onto a single point atop a central tower up to several hundred feet tall. The tower would gather heat generated by the mirror system to roughly 2,500 degrees Fahrenheit (1,350 Celsius), then deliver it into a reactor containing chemical compounds known as metal oxides, said CU-Boulder Professor Alan Weimer, research group leader.
As a metal oxide compound heats up, it releases oxygen atoms, changing its material composition and causing the newly formed compound to seek out new oxygen atoms, said Weimer. The team showed that the addition of steam to the system — which could be produced by boiling water in the reactor with the concentrated sunlight beamed to the tower — would cause oxygen from the water molecules to adhere to the surface of the metal oxide, freeing up hydrogen molecules for collection as hydrogen gas.
“We have designed something here that is very different from other methods and frankly something that nobody thought was possible before,” said Weimer of the chemical and biological engineering department. “Splitting water with sunlight is the Holy Grail of a sustainable hydrogen economy.”
A paper on the subject was published in the Aug. 2 issue of Science. The team included co-lead authors Weimer and Associate Professor Charles Musgrave, first author and doctoral student Christopher Muhich, postdoctoral researcher Janna Martinek, undergraduate Kayla Weston, former CU graduate student Paul Lichty, former CU postdoctoral researcher Xinhua Liang and former CU researcher Brian Evanko.
One of the key differences between the CU method and other methods developed to split water is the ability to conduct two chemical reactions at the same temperature, said Musgrave, also of the chemical and biological engineering department. While there are no working models, conventional theory holds that producing hydrogen through the metal oxide process requires heating the reactor to a high temperature to remove oxygen, then cooling it to a low temperature before injecting steam to re-oxidize the compound in order to release hydrogen gas for collection.
“The more conventional approaches require the control of both the switching of the temperature in the reactor from a hot to a cool state and the introduction of steam into the system,” said Musgrave. “One of the big innovations in our system is that there is no swing in the temperature. The whole process is driven by either turning a steam valve on or off.”
“Just like you would use a magnifying glass to start a fire, we can concentrate sunlight until it is really hot and use it to drive these chemical reactions,” said Muhich. “While we can easily heat it up to more than 1,350 degrees Celsius, we want to heat it to the lowest temperature possible for these chemical reactions to still occur. Hotter temperatures can cause rapid thermal expansion and contraction, potentially causing damage to both the chemical materials and to the reactors themselves.”
Solar Hydrogen engine
In addition, the two-step conventional idea for water splitting also wastes both time and heat, said Weimer, also a faculty member at CU-Boulder’s BioFrontiers Institute. “There are only so many hours of sunlight in a day,” he said.
The research was supported by the National Science Foundation and by the U.S. Department of Energy.
With the new CU-Boulder method, the amount of hydrogen produced for fuel cells or for storage is entirely dependent on the amount of metal oxide — which is made up of a combination of iron, cobalt, aluminum and oxygen — and how much steam is introduced into the system. One of the designs proposed by the team is to build reactor tubes roughly a foot in diameter and several feet long, fill them with the metal oxide material and stack them on top of each other. A working system to produce a significant amount of hydrogen gas would require a number of the tall towers to gather concentrated sunlight from several acres of mirrors surrounding each tower.
Weimer said the new design began percolating within the team about two years ago. “When we saw that we could use this simpler, more effective method, it required a change in our thinking,” said Weimer. “We had to develop a theory to explain it and make it believable and understandable to other scientists and engineers.”
Despite the discovery, the commercialization of such a solar-thermal reactor is likely years away. “With the price of natural gas so low, there is no incentive to burn clean energy,” said Weimer, also the executive director of the Colorado Center for Biorefining and Biofuels, or C2B2. “There would have to be a substantial monetary penalty for putting carbon into the atmosphere, or the price of fossil fuels would have to go way up.”
C2B2 is an arm of the Colorado Energy Research Collaboratory involving CU-Boulder, the Colorado School of Mines, Colorado State University and the National Renewable Energy Laboratory in Golden. The collaboratory works with industry partners, public agencies and other institutions to commercialize renewable energy technologies, support economic growth in the state and nation and educate the future workforce.
For more information on the chemical and biological engineering department visit http://www.colorado.edu/chbe/. For more information on C2B2 visit http://www.c2b2web.org. For more information on the Biofrontiers Institute visithttp://biofrontiers.colorado.edu.
