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Welcome to the Ecological Society of America's online education resource portal! ESA's EcoEd Digital Library (EcoEdDL) is a forum for scientists and educators to locate and contribute peer reviewed resources for 21st century undergraduate ecology education. Resources are available based on the Creative Commons Non-Commercial Attribution 4.0 International (CC BY-NC 4.0) license. EcoEdDL strives to foster a community of ecology education users and contributors. Need Help or More Info? Contact EcoEdDL@esa.org.

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View Resource Effects of frost on wildflowers: an unexpected consequence of climate change--image 15 of 22

Photo of an early-stage inflorescence of tall larkspur (Delphinium barbeyi) after a mid-June snowstorm at the Rocky Mountain Biological Laboratory. The buds were killed by the cold temperature. Like Helianthella quinquenervis, D. barbeyi is a frost-sensitive species.

 

Publisher: EcoEd Digital Library

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http://www.amjbot.org/content/96/10/1821.full.pdf+html
View Resource Effects of frost on wildflowers: an unexpected consequence of climate change--image 14 of 22

A female broad-tailed hummingbird (Selasphorus platycercus) in Colorado visiting tall larkspur (Delphinium barbeyi). The hummingbirds migrate north from Mexico each spring. Larkspurs serve as an important food source for them and for bumble bees. But larkspurs are also susceptible to frost, impacting the species that feed on them.

 

Publisher: EcoEd Digital Library

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View Resource Effects of frost on wildflowers: an unexpected consequence of climate change--image 13 of 22

Delphinium barbeyi, or tall larkspur, flowering in a year with no frost damage. Photographed (by David Inouye) in front of Gothic Mountain, at the Rocky Mountain Biological Laboratory. Altitude about 9,500 ft (2,900m).

 

Publisher: EcoEd Digital Library

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View Resource Effects of frost on wildflowers: an unexpected consequence of climate change--image 12 of 22

Excavated plants of Helianthella quinquenervis (aspen sunflower, Asteraceae). H. quinquenervis is a long-lived perennial (some individuals can live 50-75 years). Note that each plant has multiple ramets from a single root.

 

Publisher: EcoEd Digital Library

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View Resource Effects of frost on wildflowers: an unexpected consequence of climate change--image 11 of 22

Results of a demographic study of Helianthella quinquenervis (aspen sunflower, Asteraceae) within plots at 2,900m at the Rocky Mountain Biological Laboratory. Note that seedlings are not common in most years, and the overall population seems to be declining. The lack of seedlings in most years is a consequence of frost damage to flower buds the previous year (so no seeds were produced). The...

 

Publisher: EcoEd Digital Library

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