Phenological Shifts in Monarch Nectar Resources

Nathan Morrow, Dr. Diane Debinski, Department of Ecology, Montana State University, Bozeman, MT 59717-3460

Anthropogenic climate change has led to a measurable rise in annual temperatures over the past two centuries, resulting in shorter, warmer winters and earlier arriving summers. Such changes have been determined to affect the timing of life history events (phenology) in plants and animals across the globe. In this project, we will test for phenological shifts in nectar species availability for Midwestern Monarch butterflies from 1858 to the present. We will categorize life stages (vegetative, buds, buds and flowers, flowers, flowers and fruit, fruit) for thousands of historical herbarium records dating back to the mid 19th-century using archived online photos. Analysis to determine the extent to which prairie plant phenology is shifting will be done using species-specific linear regressions and comparison of data trends before and after climate change effects became manifested. We will examine a baseline time period prior to anthropogenic climate change (t1: 1858-1975) and a recent time period during which climate changes were large (t2: 1985-present).

Additional Abstract Information

Presenter: Nathan Morrow

Institution: Montana State University Bozeman

Type: Oral

Subject: Biology

Status: Approved

Time and Location

Session: Oral 10
Date/Time: Wed 1:30pm-2:30pm
Session Number: 1004
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