gardening

Our Pollinators Eat Local, Too!

By / Photography By | February 12, 2019
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We know that locally grown food is not only good for the environment and the economy, it’s also great for our health. Some people even go to extremes to find, procure and enjoy a variety of local foods. However, many don’t realize that, to our native pollinators, eating local is more than important. It is critical to their survival. For Lauren Simpson, clinical assistant professor at the University of Houston Law Center, the moment of realization came in 2013.

“After Hurricane Ike and the following drought, I started with a desire to do something to help local pollinators,” Simpson says. “What I had at the time was a proverbial ‘brown thumb’ and a wasteland of St. Augustine grass. I thought butterflies were pretty, so I started planting flowers. Then I waited, but only a limited amount of wildlife came to the garden.”

After that, Simpson started to read books about natural gardening, connected with neighborhood gardening and local butterfly groups and attended meetings and classes of the Native Plant Society of Texas. One of the most important things she learned was that 90% of insects are ultimate locavores. Their young can only eat or utilize one family, genus or species of plant. The most visible examples of this are the affnities of monarch butterflies to native varieties of milkweed, swallowtail butterflies to pipevine or spice bush and native bees to our local prairie wildflowers.

These insect/plant interactions started millennia ago as local insects developed symbiotic relationships with specific native plants and over time these insects became local diners. The nonnative “exotic” garden plants that Simpson bought (as many of us do) and planted in her garden did not originate here and offered little attraction for local pollinators. They came from distant places like Asia and South America and do not have the traits local pollinators seek to survive.

Then, as Simpson describes, “I realized that I needed to plant more local native plants to attract local insects. By 2016, my garden was only about 20 to 30% native. It was a good start and I noticed more insects in the garden. By 2017, the garden had expanded and was about 50% native and I had worked to include an assortment of local native plants—a literal smorgasbord for my garden’s insects. I also implemented gardening practices that better supported wildlife. This is when I noticed the biodiversity in the garden starting to explode. Now, the garden is at about 75% native and the garden has something to offer a diversity of pollinators much of the year.”

She also started to realize that, much like the concept of food-and-wine pairing, she was also working on planting specific native plants to pair with certain beneficial insects. She began to use plant pairings, groupings of plants that thrive and support wildlife better together. Some plants attract beneficial insects that eat pests like mealy bugs, white flies and aphids and keep them in check naturally, thus eliminating the need for pesticides.

Photo 1: Sanguine LadyBeetle
Photo 2: Buckey Butterfly

Simpson’s initial pollinator focus was butterflies because, as she says, “they are pretty, their grace and beauty captivated me. Then I realized that there was a whole lot more pollinator action going on my garden than just butterflies. There was a whole variety of insects and wildlife in my garden involved in pollination. These included butterflies, bees, flies, wasps, beetles, moths and other ‘bugs.’ Now, I even recognize there are non-insect pollinators like lizards, bats and hummingbirds that provide benefits, too.”

Very quickly Simpson started to experience what she calls her “love affair with pollinators.” She was amazed by the number of species of pollinators that she observed in her garden, currently 45 species of butterflies and 25 species of wasps. She has also identified 30 species of native bees, many of which, unlike European honey bees, are non-hiving, solitary bees that live in the garden underground or in holes in stems, logs and fences.

As a citizen scientist, Simpson readily confesses her pollinator love affairs and displays them complete with photos. She even has her list of favorite pollinators in each category. Her chosen tool for documenting her garden’s pollinators is her cell phone camera. “I may get only a few good photos for every 50 I take, but it is worth it,” she says. “I used these photos on iNaturalist.org to help identify them and record them for use by scientists.”

Simpson now curates an easily accessible, photo-filled Facebook archive of her garden’s visitors she calls “St. Julian’s Crossing Wildlife Habitat,” appropriately named after the patron saint of innkeepers and travelers, St. Julian the Hospitaller. She keeps it filled with her photos and also files tutorials and educational documents that she hopes will help jump start those who want to get involved in native plant gardening.

Photo 1: Lauren Simpson - Photo courtesy of University of Houston Law Center
Photo 2: Carpenter bee

“While I’m seeing pretty things, I’ve also learned that pollinators are incredibly important to food production,” she says. “Two-thirds of our crops require animal pollination and one-third of our everyday food items require pollination by insects; 75 to 95% of flowering plants need insect or animal pollination.

“I also learned that pollinators and many insects are in trouble worldwide and they need our help. A recent study in Germany showed that in the past 30 years insect levels have decreased around 70%. I take seriously entomologist/author Doug Tallamy’s words when he says, ‘Insects can live without us, but we cannot live without insects.’”

Most of all, Simpson is inspired by the writings of Pope Francis about St. Francis of Assisi in his second encyclical, Laudato Si’. The Pope acknowledges St. Francis’s response to the natural world was so much more than mere intellectual appreciation or economic calculus. In a recent presentation, Simpson quoted Laudato Si’: “To St. Francis, ‘each . . . creature was united to him by bonds of affection. . . . Such conviction cannot be written off as naïve romanticism . . . By contrast, if we feel intimately united with all that exists in nature, then sobriety and care will well up spontaneously.’”

To Simpson, these words and a cup of coffee are what get her up and out in the morning to watch over her pollinators while they consume her garden’s local goodness.

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