The effects of extreme temperatures on avian reproduction can vary depending on the type of environment that birds call home. A new study found that extreme high temperatures significantly diminish bird reproductive success in agricultural landscapes.
Bird populations are in rapid decline across North America. While climate change is just one of the many factors influencing North American birds, its effects are significant and can interact with other stressors, such as habitat loss. A team of University of California, Davis, researchers found that the effects of extreme temperatures on avian reproduction can vary depending on the type of environment that birds call home.
"The effects of heat are more intense for birds nesting in agriculture than birds nesting in forest, which means that canopy cover probably constitutes an important climate refuge for birds that can thrive in various habitats," said Katherine Lauck, co-lead author of the paper and a Ph.D. candidate in ecology at UC Davis.
The team of researchers analyzed more than 152,000 nesting records featuring nearly 60 bird species that were nesting in farms, forests, grasslands and developed areas across the country during the span of 23 years .The researchers also studied which types of species were most vulnerable to heat waves in agriculture.
"Farmers often build nest boxes to attract birds to their farms and help control insect pests. Maybe it makes sense to put those boxes in shaded locations," Karp said."They might also consider planting hedgerows and conserving patches of native vegetation to provide shade and help birds beat the heat. Thinking about some of those interventions might matter a lot for birds looking forward.
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