9 Works

Zooplankton in Upper Willamette Reservoirs, 2015

Christina Murphy, Amanda Pollock, Angela Strecker & Sherri Johnson
Samples targeting crustacean zooplankton were collected from 3 upper Willamette Basin reservoirs during May-August 2015. Van Dorn sampling devices were used to collect samples at discrete depths from Fall Creek Reservoir, Lookout Point Reservoir, and Hills Creek Reservoir. Zooplankton samples were collected during daytime and nighttime corresponding with the new moon phase to evaluate zooplankton diel migration in these reservoirs. Zooplankton were visually identified using a microscope and the quantity found at each depth was...

Contrasting genetic trajectories of endangered and expanding red fox populations in the western U.S.

Cate Quinn, Sophie Preckler-Quisquater, Jocelyn Akins, Patrick Cross, Preston Alden, Stevi Vanderzwan, John Stephenson, Pete Figura, Gregory Green, Tim Hiller & Benjamin Sacks
As anthropogenic disturbances continue to drive habitat loss and range contractions, the maintenance of evolutionary processes will increasingly require targeting measures to the population level, even for common and widespread species. Doing so requires detailed knowledge of population genetic structure, both to identify populations of conservation need and value, as well as to evaluate suitability of potential donor populations. We conducted a range-wide analysis of the genetic structure of red foxes in the contiguous western...

Chromophoric Dissolved Organic Matter (CDOM) Across An Elevational Gradient from Sea Level to Mountain Lakes

Kyle Juetten, Angela Strecker, Aaron Harrison, Zachary Landram, Warren De Bruyn & Catherine Clark

Measurements of heavy metals in the moss Orthotrichum lyellii collected using community science in the Duwamish Valley, Seattle, Washington, U.S.A.

Sarah Jovan, Christopher Zuidema, Monika Derrien, Amanda Bidwell, Weston Brinkley, Robert Smith, Dale Blahna, Roseann Barnhill, Linn Gould, Alberto Rodríguez, Michael Amacher, Troy Abel & Paulina López
Heavy metals concentrations often vary at small spatial scales not captured by air monitoring networks, with implications for environmental justice in industrial-adjacent communities. Pollutants measured in moss tissues are commonly used as a screening tool to guide use of more expensive resources, like air monitors. We piloted a community science approach, engaging over 55 people from nine institutions, to map heavy metals using moss in two industrial-adjacent neighborhoods. Local youth led sampling of the moss...

An improved earthquake catalog during the 2018 Kilauea eruption from combined onshore and offshore seismic arrays

XiaoZhuo Wei, Yang Shen, Jacqueline Caplan‐Auerbach & Julia K. Morgan
The Island of Hawai'i was formed by repeated eruptions of basalts at an oceanic hotspot. Kilauea, the youngest among the subaerial volcanoes of the island, erupted intensely in 2018. The eruption provided an opportunity to look into the mechanisms that operate at the volcano and associated earthquake activities, as it was recorded simultaneously, for the first time, by onshore and offshore seismometers. We used most of the publicly available seismic data during the eruption period,...

Freshwater floodplain habitats buffer native food webs from negative effects of non-native centrarchids and bullfrogs

Meredith Holgerson, Martha Barnard, Byunghyun Ahn, Marc Hayes & Angela Strecker
Species introductions are common in freshwater environments, with the potential to transform community and ecosystem structure. Predatory fishes and American bullfrogs (Rana catesbeiana = Lithobates catesbeianus) are both widespread aquatic invaders implicated in native amphibian declines. In lowland ecosystems, co-occurrence between native and non-native fishes and larval amphibians appears more common than in high-elevation ecosystems, though community interactions there are poorly studied. In this study, we used stable isotope analysis of carbon (δ13C) and nitrogen...

Population expansion, divergence, and persistence in western fence lizards (Sceloporus occidentalis) at the northern extreme of their distributional range

Hayden R. Davis, Simone Des Roches, Roger A. Anderson & Adam D. Leaché
Population dynamics within species at the edge of their distributional range, including the formation of genetic structure during range expansion, are difficult to study when they have had limited time to evolve. Western Fence Lizards (Sceloporus occidentalis) have a patchy distribution at the northern edge of their range around the Puget Sound, Washington, where they almost exclusively occur on imperiled coastal habitats. The entire region was covered by Pleistocene glaciation as recently as 16,000 years...

Estimating the abundance of the critically endangered Baltic Proper harbour porpoise (Phocoena phocoena) population using passive acoustic monitoring

Mats Amundin, Julia Carlström, Len Thomas, Ida Carlén, Jens Koblitz, Jonas Teilmann, Jakob Tougaard, Nick Tregenza, Daniel Wennerberg, Olli Loisa, Katharina Brundiers, Monika Kosecka, Line A. Kyhn, Cinthia Tiberi Ljungqvist, Signe Sveegaard, Louise Burt, Iwona Pawliczka, Ivar Jüssi, Radomil Koza, Bartłomiej Arciszewski, Anders Galatius, Martin Jabbusch, Jussi Laaksonlaita, Sami Lyytinen, Jussi Niemi … & Harald Benke
Knowing the abundance of a population is a crucial component to assess its conservation status and develop effective conservation plans. For most cetaceans, abundance estimation is difficult given their cryptic and mobile nature, especially when the population is small and has a transnational distribution. In the Baltic Sea, the number of harbour porpoises (Phocoena phocoena) has collapsed since the mid-20th century and the Baltic Proper harbour porpoise is listed as Critically Endangered by the IUCN...

Registration Year

  • 2022
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  • Western Washington University
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