CHASING UNGULATE TALES: Mule Deer and the Green Wave with Ellen Aikens

Artemis

Artemis is revisiting its best-loved series of all time: A deep dive into ungulate ecology with the scientists at the Montieth Shop. This week we're surfing the green wave! Seasonal mule deer migration is based on food availability. Deer move across the landscape to maximize their access to high-quality food resources. We're joined by migration ecologist Ellen Aikens to learn more about Wyoming's mule deer populations and how they're challenged by drought, climate change, and energy development.

PLUS: Artemis's long-time partner, South Dakota Game, Fish and Parks is offering an incredible giveaway that includes a guided pheasant hunting trip in South Dakota, a travel voucher to get there, and a $4,000 gift card to Scheel's. Don't miss out!

3:00 - Artemis's first guest to connect from overseas! Plus, moving to Germany during the pandemic

6:30 - Animal research: A generally rewarding endeavor with LOTS of challenges

8:00 A new scientist asks her peers/mentors, What's one of the most important fields to be savvy in? "GIS/remote sensing" comes up again and again

11:00 GPS collars let us see where an individual animal is going, year after year -- it's a bonafide jackpot of data. This field is called "movement ecology"

12:30 Marcia's sage advice: "Do what you enjoy doing until you don't enjoy doing it anymore. Then go do something else."

13:30 Sampling the field April-August to survey which plants are available and when. Documenting the seasonal change from green to brown was revelatory! Plus, KNOWING the place.

17:00 Dynamics in plant growth and seasonal transition influence how animals move

18:00 To study mule deer you need to become versed in the world they live in

20:00 "The green wave" - this idea that for deer and other species, young/emergent plant species are the most nutritious growth. That stage is staggered across an elevational gradient -- and this is the 'green wave' -- moving to find that nutritious feed

22:00 Most mule deer move from a low-elevation winter range to a higher elevation spring/summer range. This is colloquially called 'surfing the green wave'

24:00 Migration isn't a continuous line from Point A to Point B. Mule deer spend about 90% of their time on migration at stopover sites, foraging and eating

27:00 What makes a good stopover? It totally depends. Elevation plays a big role. They're generally places that are more lush than the surrounding area.

30:00 Fall migration: A combination of fleeing cold/snow, plus finding the lushest feed given the season... the "residual greenness"

33:00 Drought has an effect on how well mule deer can surf the green wave, which is shorter; Energy development also affects that migration

35:00 Mule deer in the West have high fidelity to their migration routes

38:00 Mule deer DO move through energy development sites... but they're not able to use those areas to the degree they would if there was no resource development there

39:00 A high-quality study would collect data BEFORE an energy project, DURING it, and AFTER reclamation

45:00 Being migratory is key for mule deer in the Wyoming Range. There ARE resident deer populations, but it's a small fraction (

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