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Full-Text Articles in Life Sciences

Breeding For Resilience To Increasing Temperatures: A Field Trial Assessing Genetic Variation In Soft Red Winter Wheat, Kathleen Russell, David Van Sanford Dec 2018

Breeding For Resilience To Increasing Temperatures: A Field Trial Assessing Genetic Variation In Soft Red Winter Wheat, Kathleen Russell, David Van Sanford

Plant and Soil Sciences Faculty Publications

Breeding for resilience to climate change is a daunting prospect. Crop and climate models tell us that global wheat yields are likely to decline as the climate warms, causing a significant risk to global food security. High temperatures are known to affect crop development yet breeding for tolerance to heat stress is difficult to achieve in field environments. We conducted an active warming study over two years to quantify the effects of heat stress on genetic variation of soft red winter (SRW) wheat (Triticum aestivum L.). Forty SRW cultivars and breeding lines were chosen based on marker genotypes at photoperiod ...


Does Environment Filtering Or Seed Limitation Determine Post-Fire Forest Recovery Patterns In Boreal Larch Forests?, Wen H. Cai, Zhihua Liu, Yuan Z. Yang, Jian Yang Sep 2018

Does Environment Filtering Or Seed Limitation Determine Post-Fire Forest Recovery Patterns In Boreal Larch Forests?, Wen H. Cai, Zhihua Liu, Yuan Z. Yang, Jian Yang

Forestry and Natural Resources Faculty Publications

Wildfire is a primary natural disturbance in boreal forests, and post-fire vegetation recovery rate influences carbon, water, and energy exchange between the land and atmosphere in the region. Seed availability and environmental filtering are two important determinants in regulating post-fire vegetation recovery in boreal forests. Quantifying how these determinants change over time is helpful for understanding post-fire forest successional trajectory. Time series of remote sensing data offer considerable potential in monitoring the trajectory of post-fire vegetation recovery dynamics beyond current field surveys about structural attributes, which generally lack a temporal perspective across large burned areas. We used a time series ...


Climate Sensitivity And Potential Vulnerability Of Guatemalan Fir (Abies Guatemalensis) Forests In Totonicapán, Guatemala, Talia G. Anderson, Daniel Griffin, Kevin Anchukaitis, Diego Pons, Matthew Taylor May 2018

Climate Sensitivity And Potential Vulnerability Of Guatemalan Fir (Abies Guatemalensis) Forests In Totonicapán, Guatemala, Talia G. Anderson, Daniel Griffin, Kevin Anchukaitis, Diego Pons, Matthew Taylor

Journal of Latin American Geography

Despite continued forest loss and extensive demand for wood products throughout Guatemala, the locally managed and protected forests of Totonicapán remain some of the most intact within the country. Here, we study the growth rings of Guatemalan fir (Pinaceae; Abies guatemalensis Rehder; pinabete) at Totonicapán to assess environmental influences on tree growth and the potential vulnerability of these forests to climate change in the western highlands. We find that late summer and dry season precipitation are critical drivers in annual ring-width variability and that tree growth responds negatively to warm sea surface temperature anomalies in the eastern tropical Pacific. Considering ...


Understanding And Predicting Coccolithophorid Calcification In A Changing Ocean, Natasha Aisha Gafar Jan 2018

Understanding And Predicting Coccolithophorid Calcification In A Changing Ocean, Natasha Aisha Gafar

Theses

My project builds on previous work to derive a new biologically based model to describe the response of coccolithophorid growth, photosynthesis and calcification to changing carbonate chemistry (pCO2), which, also accounts for the effects of temperature and light. This model, was used to increase understanding of the interacting effects of light, temperature and CO2 on the two key coccolithophores Emiliania huxleyi and Gephyrocapsa oceanica. I also examined how changing light and pCO2 influenced the large coccolithophore Scyphosphaera apsteinii through both experiments and the application of the above model.