Joe Giersch (Former Employee)
Science and Products
Filter Total Items: 21
Demographic modelling reveals a history of divergence with gene flow for a glacially tied stonefly in a changing post-Pleistocene landscape
AimClimate warming is causing extensive loss of glaciers in mountainous regions, yet our understanding of how glacial recession influences evolutionary processes and genetic diversity is limited. Linking genetic structure with the influences shaping it can improve understanding of how species respond to environmental change. Here, we used genome-scale data and demographic modelling to resolve the
Authors
Scott Hotaling, Clint C. Muhlfeld, J. Joseph Giersch, Omar Ali, Steve Jordan, Michael R. Miller, Gordon Luikart, David W. Weisrock
Climate change and alpine stream biology: progress, challenges, and opportunities for the future
In alpine regions worldwide, climate change is dramatically altering ecosystems and affecting biodiversity in many ways. For streams, receding alpine glaciers and snowfields, paired with altered precipitation regimes, are driving shifts in hydrology, species distributions, basal resources, and threatening the very existence of some habitats and biota. Alpine streams harbour substantial species and
Authors
Scott Hotaling, Debra S. Finn, J. Joseph Giersch, David W. Weisrock, Dean Jacobsen
Climate-induced glacier and snow loss imperils alpine stream insects
Climate warming is causing rapid loss of glaciers and snowpack in mountainous regions worldwide. These changes are predicted to negatively impact the habitats of many range-restricted species, particularly endemic, mountaintop species dependent on the unique thermal and hydrologic conditions found only in glacier-fed and snowmelt-driven alpine streams. Though progress has been made, existing under
Authors
J. Joseph Giersch, Scott Hotaling, Ryan Kovach, Leslie A. Jones, Clint C. Muhlfeld
Loss of genetic diversity and increased subdivision in an endemic Alpine Stonefly threatened by climate change
Much remains unknown about the genetic status and population connectivity of high-elevation and high-latitude freshwater invertebrates, which often persist near snow and ice masses that are disappearing due to climate change. Here we report on the conservation genetics of the meltwater stonefly Lednia tumana (Ricker) of Montana, USA, a cold-water obligate species. We sequenced 1530 bp of mtDNA fro
Authors
Steve Jordan, J. Joseph Giersch, Clint C. Muhlfeld, Scott Hotalling, Liz Fanning, Tyler H. Tappenbeck, Gordon Luikart
A new species of in the Rhyacophila vagrita group (Trichoptera: Rhyacophilidae) from Olympic National Park, Washington, USA.
Rhyacophila vagrita Milne, 1936 was described from specimens collected in British Columbia and Alberta, Canada. Ross (1950), while examining R. vagrita paratypes from Alberta, discovered four males that did not fi t the R. vagrita description. These he described and named R. milnei Ross, 1950. Ross (1956) established the R. vagrita group for R. vagrita and R. milnei based primarily on the synapomo
Authors
Jonathan J Lee, J. Joseph Giersch
Climate-induced range contraction of a rare alpine aquatic invertebrate
Climate warming poses a serious threat to alpine-restricted species worldwide, yet few studies have empirically documented climate-induced changes in distributions. The rare stonefly, Zapada glacier (Baumann and Gaufin), endemic to alpine streams of Glacier National Park (GNP), Montana, was recently petitioned for listing under the US Endangered Species Act because of climate-change-induced glacie
Authors
J. Joseph Giersch, Steve Jordan, Gordon Luikart, Leslie A. Jones, F. Richard Hauer, Clint C. Muhlfeld
Thermal tolerance of meltwater stonefly Lednia tumana nymphs from an alpine stream in Waterton–Glacier International Peace Park, Montana, USA
Global climate change threatens to affect negatively the structure, function, and diversity of aquatic ecosystems worldwide. In alpine systems, the thermal tolerances of stream invertebrates can be assessed to understand better the potential effects of rising ambient temperatures and continued loss of glaciers and snowpack on alpine stream ecosystems. We measured the critical thermal maximum (CTM)
Authors
Hilary G. Billman, J. Joseph Giersch, K.M. Kappenman, Clint C. Muhlfeld, Molly A. H. Webb
Seasonal movements of non-native lake trout in a connected lake and river system
Non-native lake trout, Salvelinus namaycush (Walbaum), threaten native salmonid populations in the western United States. Effective management of lake trout requires understanding movements within connected lake and river systems. This study determined the seasonal movements of subadult lake trout in the Flathead River upstream of Flathead Lake, Montana, USA using radio telemetry. The spatiotempor
Authors
Clint C. Muhlfeld, J. Joseph Giersch, Brian Marotz
Climate change links fate of glaciers and an endemic alpine invertebrate
Climate warming in the mid- to high-latitudes and high-elevation mountainous regions is occurring more rapidly than anywhere else on Earth, causing extensive loss of glaciers and snowpack. However, little is known about the effects of climate change on alpine stream biota, especially invertebrates. Here, we show a strong linkage between regional climate change and the fundamental niche of a rare a
Authors
Clint C. Muhlfeld, J. Joseph Giersch, F. Richard Hauer, Gregory T. Pederson, Gordon Luikart, Douglas P. Peterson, Christopher C. Downs, Daniel B. Fagre
Science and Products
Filter Total Items: 21
Demographic modelling reveals a history of divergence with gene flow for a glacially tied stonefly in a changing post-Pleistocene landscape
AimClimate warming is causing extensive loss of glaciers in mountainous regions, yet our understanding of how glacial recession influences evolutionary processes and genetic diversity is limited. Linking genetic structure with the influences shaping it can improve understanding of how species respond to environmental change. Here, we used genome-scale data and demographic modelling to resolve the
Authors
Scott Hotaling, Clint C. Muhlfeld, J. Joseph Giersch, Omar Ali, Steve Jordan, Michael R. Miller, Gordon Luikart, David W. Weisrock
Climate change and alpine stream biology: progress, challenges, and opportunities for the future
In alpine regions worldwide, climate change is dramatically altering ecosystems and affecting biodiversity in many ways. For streams, receding alpine glaciers and snowfields, paired with altered precipitation regimes, are driving shifts in hydrology, species distributions, basal resources, and threatening the very existence of some habitats and biota. Alpine streams harbour substantial species and
Authors
Scott Hotaling, Debra S. Finn, J. Joseph Giersch, David W. Weisrock, Dean Jacobsen
Climate-induced glacier and snow loss imperils alpine stream insects
Climate warming is causing rapid loss of glaciers and snowpack in mountainous regions worldwide. These changes are predicted to negatively impact the habitats of many range-restricted species, particularly endemic, mountaintop species dependent on the unique thermal and hydrologic conditions found only in glacier-fed and snowmelt-driven alpine streams. Though progress has been made, existing under
Authors
J. Joseph Giersch, Scott Hotaling, Ryan Kovach, Leslie A. Jones, Clint C. Muhlfeld
Loss of genetic diversity and increased subdivision in an endemic Alpine Stonefly threatened by climate change
Much remains unknown about the genetic status and population connectivity of high-elevation and high-latitude freshwater invertebrates, which often persist near snow and ice masses that are disappearing due to climate change. Here we report on the conservation genetics of the meltwater stonefly Lednia tumana (Ricker) of Montana, USA, a cold-water obligate species. We sequenced 1530 bp of mtDNA fro
Authors
Steve Jordan, J. Joseph Giersch, Clint C. Muhlfeld, Scott Hotalling, Liz Fanning, Tyler H. Tappenbeck, Gordon Luikart
A new species of in the Rhyacophila vagrita group (Trichoptera: Rhyacophilidae) from Olympic National Park, Washington, USA.
Rhyacophila vagrita Milne, 1936 was described from specimens collected in British Columbia and Alberta, Canada. Ross (1950), while examining R. vagrita paratypes from Alberta, discovered four males that did not fi t the R. vagrita description. These he described and named R. milnei Ross, 1950. Ross (1956) established the R. vagrita group for R. vagrita and R. milnei based primarily on the synapomo
Authors
Jonathan J Lee, J. Joseph Giersch
Climate-induced range contraction of a rare alpine aquatic invertebrate
Climate warming poses a serious threat to alpine-restricted species worldwide, yet few studies have empirically documented climate-induced changes in distributions. The rare stonefly, Zapada glacier (Baumann and Gaufin), endemic to alpine streams of Glacier National Park (GNP), Montana, was recently petitioned for listing under the US Endangered Species Act because of climate-change-induced glacie
Authors
J. Joseph Giersch, Steve Jordan, Gordon Luikart, Leslie A. Jones, F. Richard Hauer, Clint C. Muhlfeld
Thermal tolerance of meltwater stonefly Lednia tumana nymphs from an alpine stream in Waterton–Glacier International Peace Park, Montana, USA
Global climate change threatens to affect negatively the structure, function, and diversity of aquatic ecosystems worldwide. In alpine systems, the thermal tolerances of stream invertebrates can be assessed to understand better the potential effects of rising ambient temperatures and continued loss of glaciers and snowpack on alpine stream ecosystems. We measured the critical thermal maximum (CTM)
Authors
Hilary G. Billman, J. Joseph Giersch, K.M. Kappenman, Clint C. Muhlfeld, Molly A. H. Webb
Seasonal movements of non-native lake trout in a connected lake and river system
Non-native lake trout, Salvelinus namaycush (Walbaum), threaten native salmonid populations in the western United States. Effective management of lake trout requires understanding movements within connected lake and river systems. This study determined the seasonal movements of subadult lake trout in the Flathead River upstream of Flathead Lake, Montana, USA using radio telemetry. The spatiotempor
Authors
Clint C. Muhlfeld, J. Joseph Giersch, Brian Marotz
Climate change links fate of glaciers and an endemic alpine invertebrate
Climate warming in the mid- to high-latitudes and high-elevation mountainous regions is occurring more rapidly than anywhere else on Earth, causing extensive loss of glaciers and snowpack. However, little is known about the effects of climate change on alpine stream biota, especially invertebrates. Here, we show a strong linkage between regional climate change and the fundamental niche of a rare a
Authors
Clint C. Muhlfeld, J. Joseph Giersch, F. Richard Hauer, Gregory T. Pederson, Gordon Luikart, Douglas P. Peterson, Christopher C. Downs, Daniel B. Fagre