I recently had the chance to spend a few days exploring in the Mojave National Preserve in California to select new study sites for my study of plant-plant-pollinator positive interactions. Sunset Cove, located in the UCNRS Sweeney Granite Mountains Desert Research Centre, is host to an incredible diversity of shrubs and cacti. The two foundational species I will be studying are creosote bush (Larrea tridentata) and buckhorn cholla (Cylindropuntia acanthocarpa), which are codominant in this site.
Annuals were germinating all over the site, however they are still incredibly tiny. Both creosote bush and buckthorn were showing facilitation, with higher abundances of germinants under the shrubs than in open areas. Finally, one cool observation was that 100% of the buckhorns surveyed were growing in close association with another codominant, but only 70% of creosote bush were growing with a codominant, suggesting cacti have some interesting interactions in this area. Finally, this area has been experiencing winter rainfall leading to optimism about flowering this spring.