Monitoring recovery of overgrazed lichen communities on Hagemeister Island, southwestern Alaska

Understanding the recovery rate of overgrazed lichen communities has value to mangers of lands in northern regions. We describe lichen community composition and present recovery rate measurements for a 12-year period following overgrazing by reindeer (Rangifer tarandus) on Hagemeister Island, Alaska. Reindeer were removed from the island in 1993 following overgrazing and average total lichen biomass increased from 504.2 kg/ha (SD 205.4) in 2003 to 795.3 (SD 489.6) in 2015. We estimate time to recovery with three competing growth curves which estimate grazeable biomass may be reached in 34-41 years. However, estimates of full recovery to climax biomass varied among the models, ranging from 71 to 400 years. In 2015, lichen communities were composed of various mixtures of at least 78 lichen taxa, and were dominated by Cladina stygia and other important reindeer forage species. While reindeer overgrazing diminished forage quantity, it did not extirpate preferred forage taxa.

“Litigation Is Our Last Resort”

The permitting of large-scale industrial mines is often controversial and litigious. This article examines three legal battles over the exploratory permitting of the Pebble mine in southwestern Alaska to examine the logics and rationalities used to legitimize the permitting, the alternate epistemic arguments made by the resistance movements to redraw state-constructed boundaries, and differing definitions of land-based resources, pollution, and bias. It asks how conflicting knowledge claims and epistemic injustice are debated and settled in court. All three legal cases observed demonstrate conditions of scientific uncertainty, undone science, and bias, failing to hold space for diverse representations within legal claims. Citizen science is partially successful in addressing epistemic injustice, but to effectively mediate justice, law must distinctively question both knowledge construction and phronetic risks, including values, intent, bias, privilege, and agency, and take into consideration the ontological multiplicities and civic epistemologies of the parties within legal claims.

Influence of wolf predation on population momentum of the Nushagak Peninsula caribou herd, southwestern Alaska

We investigated wolf predation as a potential driver of population change in the Nushagak Peninsula caribou herd, southwestern Alaska. We investigated the time budgets of three wolf packs using the peninsula from 2007 through 2012, and thus potentially preying on caribou there, in order to make inferences on their likelihood of serving as an important population modifier for the Nushagak Peninsula caribou herd. We found that only one pack regularly used the peninsula. The pack using the peninsula spent an average of 35% of its time there. Its use of the peninsula was disproportionately high in late summer and fall, disproportionately low in winter, and proportional during the caribou calving season in early summer. Overall wolf use of the Nushagak Peninsula increased in direct response to increasing caribou abundance but was not a primary population driver.