Conservation genomics of Lupinus tidestromii and hybridisation with L. chamissonis
Tidestrom's lupine, Lupinus tidestromii Greene, is a federally-endangered perennial herb endemic to Northern California. It occurs in dynamic coastal dune ecosystems and is reliant on disturbance to maintain the early-successional microhabitats it inhabits. Major threats to L. tidestromii include the loss of habitat, climate change and the introduction of exotic plants both compete for habitat with L. tidestromii and indirectly increases seed predation by native deer mouse, Peromyscus maniculatus. Furthermore, the species hybridizes with L. chamissonis when they co-occur. Habitat restoration has led to mixed results. Thus, factors other than exotic species seem to threaten the species, possibly resulting from genetic factors such as inbreeding or increased drift. To best inform future management decisions which support the long-term viability of L. tidestromii, we analyze the within and among population genetic variation and morphology of L. tidestromii, L. chamissonis and their putative hybrids across their entire respective ranges. We sampled a total of 532 samples in 29 sites, 8 L. tidestromii, 12, L. chamissonis and 9 with both species. We generated SNP following the ddRAD protocol of Peterson et al. 2010.
Tidestrom's lupine, Lupinus tidestromii Greene, is a federally-endangered perennial herb endemic to Northern California. It occurs in dynamic coastal dune ecosystems and is reliant on disturbance to maintain the early-successional microhabitats it inhabits. Major threats to L. tidestromii include the loss of habitat, climate change and the introduction of exotic plants both compete for habitat with L. tidestromii and indirectly increases seed predation by native deer mouse, Peromyscus maniculatus. Furthermore, the species hybridizes with L. chamissonis when they co-occur. Habitat restoration has led to mixed results. Thus, factors other than exotic species seem to threaten the species, possibly resulting from genetic factors such as inbreeding or increased drift. To best inform future management decisions which support the long-term viability of L. tidestromii, we analyze the within and among population genetic variation and morphology of L. tidestromii, L. chamissonis and their putative hybrids across their entire respective ranges. We sampled a total of 532 samples in 29 sites, 8 L. tidestromii, 12, L. chamissonis and 9 with both species. We generated SNP following the ddRAD protocol of Peterson et al. 2010.
HELMHOLTZ CENTRE FOR ENVIRONMENTAL RESEARCH - UFZ.