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Our responsibility to stop invasives

2020 05 10 hawke invasiveBy David Hawke -- There are those who say that we humans are a part of nature, and those who say that we are separate, indeed above, nature.

Being a professional fence-sitter, I say we are both. Yes, like any other species on this planet we are just that, a species… Homo sapiens. Yet as a species we have developed skills and communications far beyond any other critters, to the point that we have power to manipulate our planet’s co-inhabitants.

          As Stan Lee wrote in 1962 in his Spiderman comic book, “With great power comes great responsibility.”

          Yet for all our ‘power,' we are still just another species that must live by the whims of natural forces: torrential rain, hurricane force winds, flooding, drought, unrelenting heat. As big and important as we may think we are, we are just another species eking out survival on this third rock from the Sun as we float through space.

          Permit me to segue to my topic of today… invasive species.

          At this time of year, there is a challenge to control the local spread of an invasive species called garlic mustard, which is shown in the photo. Garlic mustard is a plant that disrupts soil fungus to allow itself to thrive while other plant species wither and die from malnourishment or being crowded out. It is native to Europe but was brought to North America as a food plant that quickly and inadvertently escaped over the garden wall and went rogue through the woodlot.

          For a species to be listed as invasive it has to fall into the following descriptions: it comes ‘from away’; it reproduces quickly; it can survive a wide range of harsh environmental conditions; it has few if any predators in this new location; its presence interferes with and then dominates the accepted natural order of nutrient cycles; and it’s just about impossible to eradicate. All in all, a very successful take-over plan.

          But we humans, being of superior knowledge and power, will do our “darndest” to fight back the incursion of these invasive species. We will pick and pull, dig out, smother, burn or douse with chemicals any and all individuals of said targeted invasive species. However, if our goal is eradication, then we are setting ourselves up for a disappointment. Just not going to happen.

          If we change the expected outcome from eradication to control, then we have a fighting chance at success. Control the spread, control the density and thereby control (lessen) the negative impact on the local natural ecosystem. For those of us who fight garlic mustard, phragmites reed, emerald ash borer, and the hundreds of other invading species, the rally cry now is “The goal is control!”

          Now let me go back to that heady opening statement.

          Dealing with Covid-19 is akin to dealing with an invasive species. It came from ‘over there’, it spreads quickly, it preys on the weak and non-suspecting, it can be deadly, it appears to be unstoppable. To combat it, we have to share our stories of success, of experimentation, of failures… and use the power of our combined experiences and knowledge to come up with a retaliatory plan.

          And just like our attitude towards invasive species, the attainable goal will be control. Eradication of Covid-19 is highly unlikely, so how can we adapt to ‘live with it’?

          Back again to invasive species. Although I and others have accepted the challenge to keep invasives at bay, there are those in my communities that question my/our efforts, suggesting that perhaps the tramping of the forest floor, or application of herbicide, is worse than the actual impact of the invasive. Yes, there is valid argument and debate with these points.

          And so, should we let Covid-19 run unchecked through our human population, eventually reducing our population to a manageable size? That’s what nature does with overpopulation… there are many examples of waterfowl, deer, rabbits, springtails and others that reach such a high population that the available habitat can no longer sustain them, then comes a deadly crash as disease or forces deal with the weakened extras, followed by a slow and steady increase of population until the next natural intervention is required.

          Of course, Homo sapiens often thwarts nature’s population controls by waging warfare on the neighbours, and perhaps that is why the language of our collective battle against Covid-19 has a military-like flavour.

          Whether globally fighting “the invisible enemy” or the local green carpet of newly emerging garlic mustard, remember the goal is control and only with constant vigilance can this be attained. It is within our power, thus it is our responsibility.

Photo: Garlic mustard

David’s notebook: Okay, so the frogs won't be calling quite so robustly. There is about about 2cm of snow on my lawn this morning! This too shall pass? The silver lining: blackflies are stopped for a while.

© 2020 David J. Hawke

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The trilliums are shivering this year!
Sweet, handsome Simon
 

Comments 2

Guest - Outdoorsygal on Sunday, 10 May 2020 23:29

Would have been nice to see a few shots of some of these evasive species. Just a suggestion ?

Would have been nice to see a few shots of some of these evasive species. Just a suggestion ?
Johanna Powell on Monday, 11 May 2020 06:35

Thanks for your comment. The green plant in the photo is garlic mustard, one of the invasive plants Dave talks about, and should have been identified as such.

Thanks for your comment. The green plant in the photo is garlic mustard, one of the invasive plants Dave talks about, and should have been identified as such.
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Sunday, 31 May 2020

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