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The Deep Middle


Gardening & writing in the prairie echo

Can Exotic Plants Help Pollinators Adapt to Climate Change?

3/6/2019

4 Comments

 
Climate change is altering our world in massively unpredictable ways, which will lead to severe cascade effects eroding biodiversity and ecosystem function. Earth will look and act differently thanks to our privilege and short shortsightedness. Plants already bloom at different times, and insects who sync their life cycles around those plants will soon be left with less food to feed themselves and their young.

But using exotic plants to extend the bloom season is a strategy rife with issues that got us into this whole climate change / mass extinction scenario in the first place. When I hear a designer promoting exotics as a way to help pollinators, I know they're missing information. Here are some issues that come up for me:

1) Exotic plants help both invasive insects and primarily generalist pollinators (native or not). Chances are invasive insect thugs evolved with the exotic plants we're using in our gardens, so all we're doing is helping them out, either with the plant being a host for their young or for the nectar and pollen they need. Exotic plants also appeal primarily to generalist adult native pollinators, like bumble bees or many butterflies. Often someone will say something like "I saw a bee on my snowdrops or hosta or russian sage" without knowing what the species is, and in turn what role that species has in the ecosystem.

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2) Take oligolectic bees, which evolved to use the pollen of specific native plants to feed their young. Without that plant's pollen we don't have that bee. As an ecosystem loses these specialist bees other specialists are forced to become generalists, which reduces pollination rates of plants. Further, climate change is reducing the pollen protein levels, among other nutrients, so even if the right plants are available at the right time, they may not be as valuable.

3) Helping pollinators by extending the bloom season with exotic plants ignores the plant's critical role as a host for larvae. Exotic plants may help some generalist adult native insects adapt, for a time anyway, but they won't help plant-dependent species or the ecosystem adapt. Simply put, climate change is happening so fast now most life can't and won't adapt. We're looking at a 50% total planetary species loss by 2100. You can't assume exotic plants are going to make much of a difference, especially when they aren't supporting young. Native plants support many times the insect biomass as compared to exotics. But should you be using native plants from an ecoregion south or downhill of you? I don't know. Again, the climate is altering so quickly and unpredictably that the help you may be doing could be short-lived at best.

4) Predicting the future isn't easy, and while we can make some logical guesses, how do we know if / when an exotic plant will become a problem plant? Especially in the face of really unpredictable climate and weather fluctuations? Isn't assuming we know better what got us into this mess in the first place?

I think when we hear that any flowering plant can help pollinators what we're really hearing is a defense of human supremacism; the idea that in whatever garden choices we make will do SOME good on SOME level, so let's pick what's pretty or functional to us as the primary or sole motivation. We are so far beyond this limited viewpoint which eschews empathy, compassion, and scientific knowledge of how the world works. If we keep defending our plant choices in distorted ways, we're simply continuing to feed the system and conditions that have fostered the sixth mass extinction. Our privilege doesn't give us the right to use any plant we want -- it gives us the wisdom and responsibility to see beyond ourselves into the ecosystem and the thousands of lives interacting with our homes (and us) every day. The real world is not a human one, culturally or biologically, and until we start to see nature and landscapes as something part of us -- not just a tool or an artscape -- gardens will fail to wake us to a more profound community of nature, to compassion, and to empowerment.

4 Comments
bestessays.com link
6/11/2019 10:01:45 am

I think we need to listen more to what the experts have to say regarding such kinds of issues. We can't keep pretending we know what's going to happen next. We lack the knowledge and experience. We have to be humble enough to accept that. If there is any consolation, our effort and sincere desire to help is very much appreciated. The only thing that matters more for some is how much people tend to agree with them. No one is caring anymore who is getting all the facts straight. This will lead to a generation of dumb grown ups.

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academized link
7/10/2019 03:31:53 am

This area had been debatable for the last ten years but technology have already found a way to prove everyone else wrong. I can't believe I am laughing while I am saying this. Nowadays it doesn't really matter anymore who is wrong and what is right. Everyone seems to be listening only to the more popularly acceptable idea delivered by someone who is good looking enough atleast on social media. It's sick and funny at the same time.

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7/19/2019 03:07:45 am

Again, I am not sure how to react on this one but I guess I am going to try to answer this question by asking another one. Can a stranger help you with your problems? The answer is yes. Sometimes strangers are more willing to help than family and friends. For some reason, they support you more than your closest relatives do. Maybe it had a lot to do with how unfamiliar they are with your background. They can accept your success easily because unlike relatives, they don't mind if you are better because you did not come from the same tree.

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10/11/2019 04:53:44 am

oh yeah!

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    Benjamin Vogt's thoughts on prairie gardening in Nebraska. With a healthy dose of landscape ethics, ecophilosophy, climate change,  and social justice.

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prairie inspired  design

Lincoln & Omaha, Nebraska

Monarch Gardens is a prairie-inspired design firm. We specialize in lawn to meadow conversions as well as urban shade gardens.

Employing 95% native plants, our designs are climate resilient, adaptable, and provide numerous ecological benefits while artistically reflecting wilder landscapes.
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