Life Sciences Commons^™

Multi‐Scale Integration Of Tree Recruitment And Range Dynamics In A Changing Climate, Paige E. Copenhaver-Parry, Charles J. W. Carroll, Patrick H. Martin, Matthew V. Talluto

Faculty Publications - Department of Biological & Molecular Science

Aim: The rate and magnitude of climate‐induced tree range shifts may be influenced by range‐wide variation in recruitment, which acts as a bottleneck in tree range dynamics. Here, we compare range predictions made using standard species distribution models (SDMs) and an integrated metamodelling approach that assimilates data on adult occurrence, seedling recruitment dynamics, and seedling survival under both current and future climate, and evaluate the degree to which information provided by seedling data can improve predictions of range dynamics.

Location: The interior west region of the United States.

Time period: 1990–2015.

Major taxa studied: Five widespread conifer tree species.

Methods: …

Hummingbirds Budget Energy Flexibly In Response To Changing Resources, Anusha Shankar, Catherine H. Graham, Joseph R. Canepa, Susan M. Wethington, Don Powers

Faculty Publications - Department of Biological & Molecular Science

1. A key component of individual fitness is the ability to manage energy stores in response to variable resource availability, but because directly measuring energy budgets is difficult, daily energy management is rarely measured.
2. Hummingbirds' energy management is relatively simple to model compared to other endotherms because they have high mass‐specific metabolic rates and store little fat.
3. We determined which aspects of the hummingbird daily energy budget (i.e. thermoregulation, daytime activity costs, night‐time costs) change at the individual level in response to environmental variation.
4. We found that daily energy expenditure varied threefold in two populations of broad‐billed hummingbirds (Cynanthus latirostris …

Environmental Determinants Of Recruitment Success Of Subalpine Fir (Abies Lasiocarpa) In A Mixed-Conifer Forest, Elizah Z. Stephens, Christopher P. Murar, Daniel B. Tinker, Paige E. Copenhaver-Parry

Faculty Publications - Department of Biological & Molecular Science

Understanding the processes that underlie forest resilience is of increasing importance as climate change and shifting disturbance regimes continue to impact western forests. Forest research and management efforts within the low-diversity conifer forests of the U.S. Rocky Mountains have typically focused on relatively monotypic stands dominated by a single cohort, but mixed-conifer stands, such as those codominated by Abies lasiocarpa and Pinus contorta have been less widely studied. The presence of A. lasiocarpa may enhance resilience to fire- and mountain pine beetle–induced mortality and depends on successful A. lasiocarpa recruitment under a range of environmental conditions. The purpose of this …

Experimental And Theoretical Investigation Of Overall Energy Deposition In Surface-Induced Unfolding Of Protein Ions, Micah T. Donor, Austin M. Mroz, James S. Prell

Faculty Publications - Department of Biological & Molecular Science

Recent advances in native mass spectrometry have enabled its use to probe the structure of and interactions within biomolecular complexes. Surface-induced dissociation, in which inter- and intramolecular interactions are disrupted following an energetic ion-surface collision, is a method that can directly interrogate the topology of protein complexes. However, a quantitative relationship between the ion kinetic energy at the moment of surface collision and the internal energy deposited into the ion has not yet been established for proteins. The factors affecting energy deposition in surface-induced unfolding (SIU) of protein monomers were investigated and a calibration relating laboratory-frame kinetic energy to internal …