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Why We Should Rethink How We Talk About "Alien" Species
Why not promote diversity? They might be just coming for a better life. Haha!
campfire  buzz  invasivespecies  politics  conservation 
11 weeks ago by adirondacks
Paw outcome? New Zealand council proposes banning all cats
Omaui resident Nico Jarvis told the Otago Daily Times that she was shocked and planned a petition against the plan. She said that her three cats were the only way to combat a massive rodent problem the area had. “If I cannot have a cat, it almost becomes unhealthy for me to live in my house,” she said.
The move comes as New Zealand works on an ambitious goal to become predator-free by 2050. That plan is devoted to wiping out introduced species of rats, stoats and possums.
Cats have also come under the spotlight for their tendency to target native birds.

Kapiti Island’s Kotuku Parks subdivision has a no-cat rule and Auckland council is also looking at a plan to put down any cat caught in an “ecologically significant site” without a microchip.
by:CharlesAnderson  from:TheGuardian  geo:NewZealand  cats  InvasiveSpecies  environment 
august 2018 by owenblacker
The Asian long-horned beetle, which attacks hardwoods, is not a welcome sight in Algonquin Park.
invasivespecies  from twitter_favs
august 2018 by mgifford
Packrafters tackle invasive water plants
“There’s so many opportunities to explore beside the high peaks, besides bagging a peak.”
news  adirondacks  invasivespecies  conservation  paddle  hike  forestpreserve 
june 2018 by adirondacks
Battle against invasive species continues in Adirondack waters
What about those species that come here just to make a better life for their offspring?
news  adirondacks  invasivespecies  conservation  wildlife  taxes  economicdevelopment  politics 
may 2018 by adirondacks
Why We Should Rethink How We Talk About “Alien” | Smithsonian | January 9, 2018
DeWitt Wallace Biology Professor Mark Davis, an internationally recognized ecologist, was quoted. During the past ten years, he has focused his research and writing on invasive species.
macnews  macfaculty  Biology  InvasiveSpecies  alien 
january 2018 by macalestercollege
RT : Got our ID confirmed last night by Roger Thoma... it's Procambarus clarkii. Ugh. Another to worry…
invasivespecies  from twitter
august 2017 by sciurus
European green crabs turning up in places not seen on coast such as Alsea Bay. More info:…
Oregon  InvasiveSpecies  from twitter_favs
june 2017 by CraigCamp
Behind New Zealand’s wild plan to purge all pests : Nature News & Comment
a programme that the government announced last July to eliminate all invasive vertebrate predators — rats, brushtail possums, stoats and more — from New Zealand by 2050 to protect the country’s rare endemic species
science  ecology  newzealand  invasivespecies 
january 2017 by madamim
The Case Against Cats - Los Angeles Review of Books
"IMAGINE THERE’S NO CAT. Imagine there’s no mouser, no pet, no fuzzy thing rubbing against your leg, meowing for dinner. Imagine there’s no word for jazz hipsters, nothing to always land on its feet, nothing for animal hoarders to hoard, nothing to dangle from a tree limb telling you to “Hang in there!” Imagine there’re no cat memes, no Grumpy or Nyan Cat, no cat playing keyboard or framed by a misspelled catchphrase. Imagine a world without cats.

It’s not that easy to do. The cat has become ubiquitous in our lives, whether serving as pest repellent, loyal friend and companion, inexhaustible reservoir of metaphor and cultural association, or internet content. This last is the latest, but not the least, of the cat’s accomplishments. Of all the things that get shared, retweeted, liked, favorited, loved, or memed on any given day of our networked lives, up at the top of the list is always cats: cats with their heads between slices of bread, cats trying to fit into a cardboard box, cats riding around on Roombas in shark costumes. Because we love them, we put them anywhere and everywhere, spreading their images far and wide.

Cats are colonizers: this is what they do. They have colonized the internet just as they have colonized so many other habitats, always with the help of humans. This is the lesson of Cat Wars: The Devastating Consequences of a Cuddly Killer, a new book by conservation scientist Peter P. Marra and travel writer Chris Santella. From remote islands in the Pacific to the marshes of Galveston Bay, Cat Wars traces the various ways in which felines have infiltrated new landscapes, inevitably sowing death and devastation wherever they go.

Perhaps the most famous case of genocide-by-cat is that of the remote Stephens Island in New Zealand. Before the end of the 19th century, it was home to a unique species: the Stephens Island wren. One of only a few species of flightless songbirds, the wren ran low to the ground, looking more like a mouse than a bird. After a lighthouse was built on the island in 1894, a small human settlement was established; and with humans, invariably, come pets. At some point a pregnant cat, brought over from the mainland, escaped and roamed wild. The island’s wrens, unused to facing such a skillful predator, were no match for the feral cats that spread throughout the island. Within a year, the Stephens Island wren was extinct. It would take another 30 years to eradicate the feral cats.

This is not an isolated incident. Cats have contributed to species decline and habitat reduction in dozens of other cases. Because they’re so cute and beloved, we have little conception of — and little incentive to find out — how much damage cats are doing to our environment. When researcher Scott Loss tallied up the number of animals killed by North American housecats in a single year, the results were absolutely staggering: between 6.3 and 22.3 billion mammals, between 1.3 and 4 billion birds, between 95 and 299 million amphibians, and between 258 and 822 million reptiles.


It is undeniable, then, that cats are a menace to animal society, particularly those cats that are allowed to roam free outdoors. We have known this for almost a century. In 1929, the ornithologist Edward Howe Forbush commented that “the widespread dissemination of cats in the woods and in the open or farming country, and the destruction of birds by them, is a much more important matter than most people suspect, and is not to be lightly put aside, as it has an important bearing on the welfare of the human race.” Forbush, having tallied up an impressive anecdotal record of death and destruction, concluded that the cat “has disturbed the biological balance and has become a destructive force among native birds and mammals.” The cat doesn’t much care if its prey is threatened with extinction. Any small mammal, bird, or reptile is fair game, regardless of its rarity.

In one of Cat Wars’s more enlightening analogies, Marra and Santella compare housecats to the pesticide DDT. The cat, they argue, is one of the earliest known invasive species, and invasive species, they argue, are “simply another form of an environmental contaminant; like DDT, they can cause great harm and, once introduced, can be exceptionally difficult to remove from the environment.” Both started out as human technologies used to rid the landscape of unwanted pests, and both came with unintended side effects and unwanted additional destruction in the wild. Given the amount of energy we have devoted to banning DDT and ridding the environment of its consequences, it’s noteworthy that we seem so uninterested in a similar remedy for the scourge of cats, which, by most metrics, are far more destructive. The authors note that, while cats have been implicated in the decline and extinction of some 175 different species, “there are no confirmed bird extinctions from the pesticide DDT.”

The news that housecats are laying waste to wide swaths of biodiversity has not, like revelations about climate change or other ecological evils, led to some kind of scientific consensus about what was to be done. It’s led, instead, to the establishment of two warring camps: the cat people and the bird people. The bird people think that the wholesale slaughter of the world’s bird population is a problem requiring human intervention, namely the banning of feral and outdoor cats, forced sterilization, and euthanization. The cat people are aghast at these solutions, and argue instead that cats, being innate predators, should be allowed to fulfill their natural directive. When University of Wisconsin professor Stanley Temple published a report noting the high number of birds being killed by cats, he was besieged with death threats. “Many Wisconsites (at least those who wrote letters to the editor and hate mail to Temple),” Marra and Santella write, “were much more concerned that cats were being blamed for songbird deaths than with the fact that millions of songbirds were being killed. And some were more troubled about the possibility of cats being killed than they were about the life of a researcher.”

In the ensuing stalemate, legislation has been halfheartedly introduced, allowed to languish in committee, and finally scuttled altogether. Half-measures have been introduced that do no good. Invective has been hurled from both sides with increasing ferocity. And, meanwhile, cats continue to kill all manner of creature of field and stream.


Cat Wars raises an interesting ethical question: is it justifiable to kill one animal because that animal kills other animals in disproportionate numbers? The authors cite Bill Lynn, an ethicist who has supported the culling of one species as a means to protect another, calling such work a “sad good.” But Marc Bekoff, an evolutionary biologist at University of Colorado, Boulder, contends the opposite: that the life of each individual animal must be weighed separate from a concern for species and for diversity. This kind of dilemma — is it morally acceptable to sacrifice the one to save the many, or the many for the one? — has long vexed philosophers of human ethics, and it is fascinating to see it here played out with regards to interspecies warfare.

Rather than explore this difficulty further, though, Cat Wars remains mostly about the war between cat people and bird people. Marra and Santella are clearly bird people. (Marra, after all, is the head of the Smithsonian’s migratory bird center.) The pro-bird, anti-cat thrust of their book is not subtle. “Allowing owned cats to roam freely outside,” they write, is an example of “irresponsible pet ownership,” a message they drive home with increasing emphasis. (Full disclosure: I don’t have a dog in this fight. I’m a dog person.)
Cat Wars is one of those strange books, reading which one can feel generally comfortable with the authors’ conclusions while growing increasingly frustrated with their bad faith arguments, rhetorical sleights-of-hand, and other abuses of the reader’s trust. A chapter that focuses on cats as disease vectors is the worst offender. They point out, correctly, that housecats can be carriers of bubonic plague (an Arizona man died in 1992 after catching plague from a cat) as well as rabies, and that Toxoplasma gondii, a parasite found in cat feces, has been linked to behavioral changes in humans. It’s true, of course, that cats can transmit plague and other diseases, but this trait is not unique to them, nor are toxoplasma cysts restricted to outdoor cats. The haphazardness of these arguments makes the book seem indiscriminate in its anti-cat bias. Repeatedly, Marra and Santella offer rhetorically strong arguments that fall apart under scrutiny. They claim, for example, that “[w]ild birds and mammals […] have rights that do not seem to receive as much attention as the claimed rights of cats to wander freely outdoors.” It’s true that threatened and endangered species are protected under law, as are pets (mostly in the form of animal cruelty laws). But what can it mean to say that other, non-protected birds and mammals have “rights”? What kind of rights? Moral rights? Rights under some unstated but presumed “natural law”? Is this a call to extend legal protection to all American animals? Are all animals created equal? Does the equally invasive black rat lack rights that more charismatic native songbirds have?

Cat Wars also bends over backward to paint cat-owners, particularly those who advocate for outdoor lifestyles, as unstable and poorly educated. As Marra and Santella become increasingly polemical, they resort to refuting a straw-man “leading outdoor-cat advocate’s website” bullet-point-style:
CAT ADVOCATE CLAIMS: Cats have lived outdoors for more than 10,000 years — they are a natural part of the landscape

SCIENCE SAYS: Domestic cats are an invasive species throughout their current range, including North America

This … [more]
cats  colinedickey  2016  literature  petermarra  chrissantella  animals  environment  colonization  books  housecats  pets  multispecies  biodiversity  ethics  billlynn  marcbekoff  life  nature  birds  wildlife  invasivespecies  songbirds 
january 2017 by robertogreco

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