Friday, 16 June 2017

Assumptions in Conservation: New Zealand

Animal pests are a major threat to New Zealand’s native species. Controlling these pests is essential for the survival of our special native plants and animals,” writes the New Zealand Department of Conservation (DOC) on their website.

These statements are presented as facts, but just how true are they? If you want to talk about prove-able true, they aren’t. These are assumptions: beliefs that are presented as facts, and often understood as facts, but they are, in truth, just beliefs. There is no hard science behind them, and no hard evidence. 

There are a few real-life examples where some native species have been encouraged to thrive in a pest-eradicated environment. Locally, Kapiti Island and Zealandia come to mind. In both cases, ongoing supervision is essential and vigilant, and the public are only allowed into these areas on a ticketed basis. These "successes" are “soft” science at best. And they are not self-sustaining, because these are islands (real and metaphorically), bastioned by man against the randomness of Nature. 

On the other hand, studies like this one show invasive species (in this case, honeysuckle) can often be beneficial for both native fauna and plants, and should have us asking if removal of many invasive species is harmful rather than beneficial. This morning I noticed a whole flock of tiny native silver-eyes feasting on the flowers of a winter-blooming Australian bottlebrush, and I thought "These birds don't care if the plant is a foreigner--they're just grateful for the winter tucker."

In New Zealand, which is currently working on an initiative to become “predator free” by 2050, the idea is to completely eradicate some invasive animal species, defined as “pests” and “predators” (as if these two words were synonyms) from the entire country. In the direct firing line are rats, Australian brushtail possums, and stoats, with allowed/encouraged bykill of other animal pests including feral deer, goats, cats, and horses, plus hedgehogs, rabbits, even rainbow lorikeets (who have the audacity to be of Australian origin!).

In the plant department, pine trees that grow wild and random rather than in neat rows in a farmed plantation setting are first-line targets for poison. Also on the Dirty Dozen hit list put out by DOC are wild ginger, English ivy, woolly nightshade, buddleia, banana passionfruit, and honeysuckle. That's just the tippy top of DOCs list of 350 “environmental weeds”. These are naughty plants! Pines dare to grow where farmers want grassland. Ivy, passionfruit, and honeysuckle dare to be vines in the forest where their presence may smother native plants. Buddleia dares to “exclude native species” (DOC’s words, not mine). 

I find the attack-imported-species approach to conservation reductionist and limiting. Unlike Man, Nature does not single out specific species as good or bad, useful or unwanted. She is holistic, and allows plants and animals to thrive in appropriate ecological niches, recognizing their value. If a niche is vacant, she fills it so the whole ecosystem can function effectively.  When an ecosystem is thrown out of kilter, Nature adapts.  She has to. The success of an ecosystem is dependent upon the many roles and functions fulfilled by a wide variety of plants and animals, as well as the environment they inhabit. We as a species are just beginning to learn about all these connections.

New Zealand is a country of farmers and gardeners, plopped like Adam and Eve into the Garden of Eden of God’s Own Country. And, to be fair, this is an agricultural country with many highly-productive farms and some truly glorious gardens. But the concept of land management now goes way beyond the farm fence and the backyard garden into our supposedly-wild spaces. Where once Kiwi settlers brought their favourite plants and animals from “home” so they could enjoy them here, the “new age” thinking/fashion is to eradicate all those imported plants and animals to create a sort of mythical pre-European-human wilderness utopia. (Note, that's not pre-Maori;  early Maori burned off much of the country’s forests and are credited with 38 bird extinctions.)

Never mind that some of the native plants and animals that once thrived in New Zealand are now gone (the browsing moa, now replaced ecologically by deer and goats, is the largest and best-known example), or that the “best” and most habitable lands have been taken over by agriculture, criss-crossed by roads, dotted with towns and cities, splattered with windfarms, and altered forever. Never mind the mounding piles of plastic rubbish and old tyres, the air pollution from cars and trucks and woodfires, the phosphates and nitrogen runoff from the fertilizers and dairy cow poos and wees sinking into the soil and running down into our streams and rivers. Never mind the environmental impact of climate change. 

Our world, and this country, is not what it was 100 years ago, 300 years ago, 500 years ago, 1000 years ago. Like it or not, the old pristine New Zealand wilderness is fast disappearing even in the very few places where it still, sort of, exists. We are in the process of terraforming a new landscape. The new, current goal is to create a landscape without “imports” (unless they're farm animals and plants firmly contained on farms). Plants and animals that have, like us, integrated into the new landscape and filled ecological niches, are no longer wanted. Unfortunately, the most powerful “tool” available for the goal of eradicating all these imports is poison. Hence regular aerial drops into our forest of killer poisons like 1080 and brodifacoum. Hence the rampant use of poisonous weed killers like glyphosate (Roundup), Interceptor and Versatil.

I’ll flick back to the beginning idea here. These are key assumptions:

1                       Pests are a major threat to New Zealand’s native species.
2          If pests are eradicated, New Zealand’s native species will thrive.

Are both of these statements true? Is either of these statement true? Are they true even if their environment is whittled away and poisoned? Even if ecological niches are left unfilled? 

Wednesday, 7 June 2017

Eating Meat

I want to start this post by saying that I am not a vegetarian. I grew up eating meat, all of my family eat meat, and most of my friends eat meat. A decade or two ago, I rarely thought about the meat I was eating. As a child I was uncomfortable with, even repelled by, the sight of deer carcasses hanging from the tree in the yard, but I always enjoyed the roast venison and succulent stews. My father killed them, my mother cooked them, and we had food on the table, for which we were grateful. I did not hunt myself.

Later, living on a lifestyle block in New Zealand, I hated the autumn kill day when our 6-month-old lambs began their inevitable transition from paddock to freezer, but I was happy enough to eat the barbequed lamb chops and those glorious, melt-in-your-mouth glutinous lamb shanks, slow-roasted in a rich tomato and onion gravy, served with a heap of buttery mashed potatoes and a side of peas. Ah! See how easy it is to transform oneself from animal carer to foodie in less than a sentence? (And we will choose to forget the cries of the ewe mums standing at the fence in the paddock adjacent to the killing pen, mourning the loss of their babies. It is what it is.)

But as I grow older (certainly), and wiser (perhaps), I find myself increasingly uncomfortable with the dilemma of caring for and about animals, and seeing them as intelligent and sentient beings with as much right to live—and potentially as much meaning in their lives—as I do/have, and then eating them. Meanwhile, the historically-touted health benefits of meat consumption have dwindled down in modern times to nearly—if not totally—negligible. Meat consumption is linked to heart disease, diabetes, and several cancers, especially bowel cancer, and concerns grow regarding industrial farming methods and the use of GMO feeds and livestock feed additives, antibiotic use, animal welfare issues, water contamination, and animal waste.

“Does a cow value its life more than I enjoy a barbeque?” asks conservationist Damien Mander in this TED talk, and I think this is a question worth pondering. Because that’s what it comes down to.



More simply, a small child stages an act of defiance, crying “I won’t eat animals” and offering the persuasive argument "they don't really like being cooked" in this popular you-tube clip. (It's cute. Watch.)

Me? I don’t eat much meat anymore. I don’t even like it much anymore. I can no longer totally divorce in my head the meat on my plate from the animal that was killed to become this food ingredient I don’t need for my own health or survival or well-being. Still, when eating with friends, perhaps at someone’s house or at a restaurant without appealing vegetarian options on the menu, or when travelling, I will—mindfully—enjoy that roast lamb or Thai beef salad or cassoulet with chorizo. I am a bit of a “foodie” after all. And I’m not giving up my occasional (once a month or so) fish’n’chips anytime soon, though I include fish in my head as “animals”. But my own meat consumption is definitely down to “occasionally” and “mindfully”. It’s a compromise position.


Just my thoughts. Each of us will make our own choices, after all. 

Tuesday, 30 May 2017

When Language Gets Hijacked

In New Zealand at the moment there is a big ecological push to flush out and exterminate the country’s “predators”. I put the word in quotes because, by dictionary definition, a predator is “an animal that hunts, kills, and eats other animals.” Animals like lions, tigers, wolves, hawks, and owls might spring to mind. Implied in the word is a connotation of “dangerous” and “bad”.

Brushtail Possum, photo from Wikipedia
In New Zealand, however, the word “predator” is coming to mean any animal not native to New Zealand, regardless of its diet, which is assumed to be harmful to New Zealand’s indigenous flora and fauna. This, oddly enough (if you honour the traditional definition) includes brushtail possums, rats, deer, feral pigs, and magpies, as well as stoats and feral cats (which are “true” predators), but NOT native hawks or owls or tuatara or insect-eating fantails and weta (large indigenous insects themselves) which are also “true” predators.

It bothers me when a word is hijacked by politicians or marketers and given a new meaning that is simply accepted by the public, usually opening up opportunities for somebody to make a whole bunch of money. In this case, it’s the chemical poison industry, who get to drop tonnes of 1080 baits over New Zealand’s forests every year, and manufacture and lay brodificoum and cyanide ground poisons. That’s great for not only production but also employment—people’s jobs are on the line. The latest political splash, which has gained some notoriety around the world, is a plan to make New Zealand “predator-free” by 2050—and they’re not talking about lions and tigers. Or tuatara or wetas or native hawks.

I have some pretty strong thoughts on the roles of various animals in natural ecosystems, but this post is about language use, so I’ll leave that issue for another piece of writing. Instead, I’d like to bring up another personal language “peeve”.

Photo from CBS article linked in text.
The word “antidepressant” first appeared in 1959 in the New York Times to describe two new drugs, imipramine and ipronazid, which appeared to ‘reverse psychic states’. This appealing word took the world by storm, and was soon on the lips—and in the advertising--of every pharmaceutical marketer wanting to market new drugs. Clinical trials, almost all run by the drug companies who make the drugs, all showed limited benefit over placebo (a fake “med”) of their “antidepressants” and often a bevy of side effects to boot, but when a drug was marketed as an “antidepressant”, both patients and doctors were eager to buy and try. After all, nobody wants to be depressed, right? Today we know that antidepressant drugs can make depression worse in the long term, and can even cause suicidality, but the power of the word, and the idea that something can easily fix depression is so powerful that few people can even grasp the idea that an “antidepressant” may not be—in dictionary terms—an anti-depressant at all.

These examples aside, I accept and appreciate that our language is an evolving entity, and that dictionary definitions are not created by word police but by us, ourselves, with our language usage. I’m not bothered by new words that creep into everyday conversations and, eventually, make it into dictionaries like lol, app, and google as a verb. Nor am I usually bothered by words whose meanings change, often dramatically; think gay, ace, cool, and hot for starters, though I still snag sometimes at mother.


On this theme of our changing language, and to end this post on a positive and more generic note, this link goes to an interesting list of 20 common words (i.e., nice, awful, fizzle, wench) whose meanings have significantly changed over time, and an excellent TED talk on language change from Ann Curzan. 

Sunday, 28 May 2017

Gut Bacteria Influences Health and Well-Being

Gut bacteria photo from the article on the link between
anxiety and gut bacteria (linked left)
There were several posts that came up on my Facebook feed this morning about gut health and various illnesses. One linked bipolar “disease” to an unusual and deficient gut biome while another one explored the link between the gut biome and Alzheimer’s. Neither of these diseases were common 100 years ago. And here's a slightly older story on the link between gut bacteria and anxiety.

So what is happening in our digestive tract now that wasn’t happening in the past?  It’s fairly obvious that we have a lot of processed foods in our diets that our grandparents and great grandparents never ate. Food additives—artificial colours, artificial flavours, flavour enhancers, preservatives, mouth-feel/texture ingredients—are often identified by numbers on food packets, or disguised as something else. “Flavour” sounds less alarming than “artificial flavour,” “brown rice syrup” sounds healthier than “sugar”, and hydrolyzed vegetable protein sounds fairly benign but it contains MSG (monosodium glutamate), a “nasty”.  Those are fairly obvious things.

Then we have packaging. Everything these days seems to come in plastic bags or wraps: snacks, breakfast cereals, pet foods, fresh meat, fresh vegetables. We have plastic-lined cans, plastic lined boxes, plastic milk containers and plastic juice containers. Buying a cooked chicken at the supermarket deli? Bet it comes wrapped in hot plastic. Yes, we even cook in plastic, from microwaving in plastic containers to frying meat in Teflon pans and baking muffins in pink silicone “tins”. Besides being a disaster for our landfills and rubbish dumps, there is growing concern about the impact of the leaching of harmful molecules from plastic food wraps, containers and cookware into our food and bodies. The jury is still out, but long-term accumulation of toxins from plastic in the body seems likely.

Meanwhile our commercial food crops are grown with a bevy of toxic chemicals: weed-killers and pest-killers are scattered and sprayed over crops, sometimes shortly before harvest. For example, some farmers actively spray their wheat and potato crops with glyphosate (RoundUp) before harvest to make harvesting easier and more profitable. They call it “desiccation;” which sounds less ominous than poisoning--the power of vocabulary. The plants take up these poisons systemically and retain it, and it doesn’t wash off. Even the chemical fertilizers used to encourage growth in tired soils are toxic.

Think meat and dairy products are better options? That all depends upon what the animals have been eating. GMO corn and soy are common ingredients in animal feed (probably including what you’re feeding your dog or cat), and even “grass fed” beef and sheep are sometimes grazed on sprayed pastures. Food animals are also treated with antibiotics, chemical wormers and drenches, and some may be given growth hormones.

Our water, too, is contaminated with chemicals. Chlorine (which kills bacteria, including the bacteria in your gut) and fluoride are the two most talked about chemical additives in our tap water. Chlorine kills not only the bad bacteria, like e coli, that may be lurking in our water, but also the good bacteria in our digestive tracts.

And the pills we take to fix our various ailments also alter our gut bacteria. Antibiotics are notorious, of course (killing bacteria is their job), but most drugs alter the gut biome.

Our whole economic system is geared around making a profit, not around enhancing human health, and the chemical companies reign. While most foods and products we buy are not toxic in a single-serving sense, years of accumulated toxic load on our systems may affect all of our organs, and even single servings may have temporary or longer-term effects on gut flora and fauna. And we need all those eager little gut bacteria to stay healthy and digest our food. 

There are, of course, a few things you can do right now to make a difference. Buy organic food products as much as you can or grown your own food. Avoid “junk” food and highly processed foods. Do your own cooking. Don’t cook in plastic, and limit the amount of plastic used in contact with foodstuffs. Use filtered water if you can. Don't take drugs you don’t really need. Avoid, or at least limit, your own chemical contamination.

Ultimately, though, the system needs to change if we want to live in a world where making healthy, natural choices isn’t dependent upon personal awareness, education, and financial situation. Awareness is growing. And that’s a good start.