For most of history, people were bent on dominating and conquering nature, clearing land, killing predators, and domesticating the wild. Now humans are determined to prevent some species from going extinct, from trees to frogs to large cats. Here are some recent ones:
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Headlining, With Great Fanfare, Some Crocodile Fossils: The open-access journal ZooKeys published a monograph describing crocodile fossil finds from the Cretaceous period, including what the scientists describe as three new species. "My African crocs appeared to have had both upright, agile legs for bounding overland and a versatile tail for paddling in water", said Paul Serono, the National Geographic explorer in residence (emphasis added). (via Science in "Slideshow: Ancient Crocs With a Dog-Like Walk")
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Darwin's Mockingbirds: Scientists are analyzing DNA they've extracted from the footpads of mockingbirds brought back by Darwin. They hope to use the information to select species of mockingbirds most like the original ones, and reintroduce these species to the island of Floreana.
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Amazon Deforestation Slows? Brazil reported a record low for Amazon deforestation, the lowest it has been in 21 years. Only 7,000 sq km was destroyed between July 2008 and August 2009. However some organizations tempered any enthusiasm over Brazil's claims. Greenpeace said in a press release that its would be happy when " in 11 years time, the Amazon was being destroyed at a rate of a little less than three cities the size of Sao Paulo a year". Some people suggest the recent reduction is related to the economic recession. We previously wrote about deforestation here, here, and here.
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Modeling Deforestation and Degradation -- REDD: The journal Nature describes a deforestation modeling project aimed at "reducing emissions from deforestation and forest degradation" (REDD). Emissions from deforestation and degradation account for about one-fifth of the world's total emissions, however deforestation goals weren't included in the Kyoto Protocol because there was no reliable system for estimating CO2 emissions reduction. Scientists think that REDD is one of the cheapest ways of reducing overall emissions. If models were robust, richer countries could use the forecasts to reduce CO2 emissions, and to compensate poorer countries for minimizing biomass loss, more economical than reducing industrial emissions.
A REDD project by Applied Systems Analysis (IIASA) uses three existing land-use models to predict future losses. Project scientists say this model is a better predictor of deforestation than estimates based on historical analysis. The model predicts higher rates of deforestation in Central African countries of the Congo Basin than historical based predictions do, because economic activity in Africa is accelerating. Therefore compensation would be relatively greater in Africa using REDD, whereas Brazil, where deforestation has been going on for years, would fare better using a historical model. However as with any model, REDD is naturally only as good as the data going in, and doesn't factor in illegal logging.
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Geo-Wiki: In order to improve deforestation models, another tool, Geo-wiki asks volunteers to help refine land cover maps by filling in knowledge about their local areas (via Nature).
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17,000 Species, Leagues Under The Sea As the rainforests disappear, scientists involved with the Census of Marine Life released a preliminary report on a bounty of life in the sea below the reach of sunlight, including this copedpod on the left, which I'm most enamored with.
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Scientists Make Mistakes about Skates: Species of skate may be fished to extinction because of species identification mistakes, according to research reported in Aquatic Conservation. Since the 1920's scientists thought two species of skates -- which are cartiligenous fish like rays and sharks -- were only one species. The two distinct species, the flapper skate, Dipturus intermedia and the blue skate, Dipturus flossada were grouped together and known as the common skate: Dipturus batis. The French researchers say that both species may be more endangered then previously assumed because of the taxonomic labeling mistake.
The researchers also point out that official fisheries statistics done by French ports grouped five distinct species under only two species names. The ports survey used the counts to calculare skate decline, but more precipitous declines of some of the five species were masked in the survey. The scientists warn that similar fishing surveys may gloss over species loss in "Taxonomic Confusion and Market Mislabelling of Threatened Skates: Important Consequences for Their Conservation Status". Igle et al, Aquatic Conserv: Mar. Freshw. Ecosyst. (2009). DOI: 10.1002/aqc.1083
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Carp Invade Great Lakes:
Some carp are endangered. Jullien's Golden Carp Probarbus jullieni, found in South East Asia, especially in the Mekong, is considered a threatened species. The so called naked, or scale-less carp, Gymnocypris przewalskii, is found between freshwater rivers and the saltwater Lake Qinghai in China and is also endangered. Others species of carp are not endangered, rather they endanger.
Scientists now think that two species of "Asian Carp" have invaded the Great Lakes. The bighead carp Hypophthalmichthys nobilis and silver carp Hypophthalmichthys molitrix threaten the $7 billion dollar fishing business of the Great Lakes. These fish grow up to up to 100 pounds and eat 20% of their body weight in plankton and will wipe out native fish. The silver carp not only endangers fish, it can apparently can endanger boaters who sometimes protect themselves from injury by wearing hockey helmets on carp infested waters.
The bighead and silver carp were imported by catfish farmer's in the 1970's to remove algae. When the fish began to take over the ecosystem, federal and state governments spent ~$10 million on electrical barriers to keep the carp out of the lakes. Based on DNA samples recently collected by scientists in the water on the lake side of the fence, the carp have crossed the fence. The Army Corps of Engineers told the New York Times that "all options are on the table" to control the fish.
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Pelican Decimated by DDT Off the Endangered Species List: The brown pelican is one of four species to be removed from the endangered species list. The US Department of Fish and Wildlife has removed bird, Pelecanus occidentalis since populations have increased. DDT decimated the species in the 1970's, but since the chemical has been less in use, the bird has had the opportunity to breed and thrive. (Hat tip to Nature News and its alliteration addled "Big Billed Bird Bounces Back".)
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Climate Change Negotiations - Like Watching Clothes Dry?
In last weekend's Financial Times, Matthew Engel compared the US reluctance to combat climate change with Americans' civic battles over punitive hanging and hanging clothes on clotheslines. Turns out that when Engel moved to the US from Australia he brought his Hills Hoist with him, which provided him unique cultural insight. (The internet explains that a Hills Hoist is a rotary clothesline developed in Australia which can be mechanically raised, lowered and spun. In addition to these features, the Australian government lists the contraption as a National Treasure, prized "because it could hold four nappies on each of the four outer wires.")
Anyway, when Engel put up his Hills Hoist he realized that the US generally disparages clothes hanging. Although his neighbors were accommodating of his family's aired laundry, Engel tells the story of one Pennsylvania woman who's battling her community in defense of her right to hang clothes -- "if my husband has a right to have guns in the house, I have a right to hang laundry", she says. Engels observes the irony of US communities forbidding homeowners from hanging their clothes outside, given that clothes dryers account for six per cent of US consumer end-use electricity consumption.
With similar cognitive dissonance, he says, the US claims that climate change action is an important priority, but backs away from any Copenhagen commitment (at the same time endorsing such a thing hopes alive). Attempting to explain the apparent clash of values, he thinks (and I'm just reporting) that although Americans define themselves with property rights and piousness, these values clash with puritan ethics and an "unshakeable faith in technology, lingering from the 1950s."
Acronym Required previously wrote about cognitive dissonance in "Cars, Selling Cognitive Dissonance", "Sea Change or Littoral Disaster" and many others.
