BISMARCK, N.D. — On a remote tallgrass prairie in North Dakota, a secretive orchid pokes up from the ground. You’ll only find it if you know where to look.
The striking, bright white blooms of the western prairie fringed orchid are elusive to fans who try to catch a glimpse — and as a threatened species protected by the federal Endangered Species Act, it is also a puzzle for researchers trying to learn more about the orchid’s reproduction and role in its ecosystem.
Loss of its native prairie habitat has threatened the orchid. About 60 percent of native orchids in the U.S. and Canada are rapidly disappearing due to climate change, habitat loss and pollinator declines, said Julianne McGuinness, program development coordinator for the North American Orchid Conservation Center. Those showy, flowering plants beloved for their beauty can be an early indicator of decline occurring unnoticed in its environment.
“They’re sort of like the canary in the coal mine for the rest of our ecosystems,” McGuinness said.
Graduate students from North Dakota State University in Fargo are hoping to learn more about the pollinators and reproduction of the western prairie fringed orchid. Their work includes logging the GPS coordinates of orchids at 20 various sites in Minnesota, North Dakota and Manitoba, Canada, swabbing orchids for tiny amounts of genetic material from insects, and attracting pollinating insects at night with blacklights and sheets.
Years ago, Steve Travers, an associate professor at the university’s Department of Biological Sciences, was fascinated to learn about the orchid — “these big, beautiful, 2-foot tall, ginormous, gorgeous things that were pollinated at night.”
“I have a hell of a hard time finding it sometimes,” he said. “And when people see it the first time, there’s like almost this rapid intake of breath. I mean, it’s so big and it’s just spectacular.”
The orchid is a unique insight into its nearly vanished ecosystem — the tallgrass prairie — as well as for understanding connectedness with pollinators and other plants, and is a good model system for studying rarity, Travers said.
The orchid’s only known pollinators are hawkmoths, big moths that are just the right fit and size to reach the orchid’s nectar, in a long spur, while also pollinating the plant.
The western prairie fringed orchid is mostly found in reserves, such as the Sheyenne National Grassland in North Dakota and the Manitoba Tall Grass Prairie Preserve. The peak of the orchid’s bloom was roughly mid-July.
Populations can be as small as one plant or as large as 500 to 1,000, Travers said. Once located, the researchers log the individual orchids’ GPS coordinates to within 4 inches accuracy so they can return later. Finding the orchid when it isn’t flowering is like looking for a brown stick in a big, green field, Travers said.
Graduate student Josie Pickar’s work is focused on what affects the orchid’s reproductive success, including soil nutrients and pollinator service. She’s been traveling to about 20 sites, looking at subsets of orchids, to gather soil samples and moisture content, count flowers, and record plant heights and conditions, as well as monitoring the orchids via trail cameras for what might be eating them.
In September, she’ll go back and count the orchids’ seed capsules, which are extremely hard to find.
