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New 50-year study offers insight into effects of climate on bird reproduction
Beyond effects of a warming climate on individual species’ reproductive output, the study also considered whether climate change may affect offspring production by interacting with other attributes of the birds…
Warming temperatures also were associated with less offspring production among relatively large birds. These changes were not necessarily caused directly by climate change but by the effects of climate change on the life histories and ecological traits of species that influence clutch size and rates of nesting failure over time…
Future of many North American crops may depend on ground beetles’ response to climate change
By analyzing data on 136 different ground beetle species from diverse habitats across continental North America, Puerto Rico and Hawaii, the researchers found that a species’ odds of success in a changing climate depend on several core traits, such as its habitat preference, body size, and whether it flies, burrows, climbs, or runs.
“We found that less mobile, nonflying ground beetles, which are critical pest control agents, are more likely to decline over time in a warmer, dryer climate,” said Tong Qiu, assistant professor of multifunctional landscapes at Penn State, who led the study. “That means you’re going to have more pests that can impact agricultural and forest ecosystems…”
Migratory birds can partially offset climate change
“Understanding how animals can compensate is an important part of understanding where the impacts of climate change will play out,” said Marra. “In this case, we may not lose a species entirely, but it is possible that populations of some species may go extinct locally due to climate change…
“The good news is that birds are able to respond to changes in their environment,” Dossman said. “They have some flexibility and variation in their behaviors to begin with, but the question is, have they reached the limit of their ability to respond to climate change?”…
Climate change presents a mismatch for songbirds’ breeding season
Spring is the sweet spot for breeding songbirds in California’s Central Valley — not too hot, not too wet. But climate change models indicate the region will experience more rainfall during the breeding season, and days of extreme heat are expected to increase. Both changes threaten the reproductive success of songbirds, according to a study from the University of California, Davis…
Biodiversity safeguards bird communities under a changing climate
Community-level diversity works as a buffer against negative climate change impacts, especially during winter, i.e the season that has shown strongest climatic warming across the Northern Hemisphere.
On the other hand, biodiversity played a smaller role during the breeding season. Indeed, earlier studies have shown that bird communities change faster during winter than summer, which explains this pattern…
Climate change, habitat loss (and, yes, even cats) pose a greater threat to birds than windmills
Research quantifying the full scale of wind turbine activity’s impact upon birds both through their migratory patterns and killed by collision with wind turbines is a matter of current scientific studies. It is important to quantify these impacts, but it is also important to acknowledge that these impacts are certainly negligible compared to other drivers of bird mortality.
The number of birds killed by wind turbine collisions per year is estimated to be between 150,000 and 500,000, but when you put this number in perspective, it pales in comparison to other causes of bird mortality…
Nearly 3 billion birds gone
The first-ever comprehensive assessment of net population changes in the U.S. and Canada reveals across-the-board declines that scientists call “staggering.” All told, the North American bird population is down by 2.9 billion breeding adults, with devastating losses among birds in every biome. Forests alone have lost 1 billion birds. Grassland bird populations collectively have declined by 53%, or another 720 million birds.
Just hearing or seeing birds can boost our mental health, new report suggests
“Our main finding is that there is a time-lasting association between seeing or hearing birds and improved mental well-being,” said the study’s lead author, Ryan Hammoud, a PhD candidate and a research assistant at the institute of psychiatry and psychology and neuroscience at King’s College London…
Climate change is ratcheting up the pressure on bees
Drought conditions in the western U.S. in 2021 dried up bee forage — the floral nectar and pollen that bees need to produce honey and stay healthy. And extreme rain in the Northeast limited the hours that bees could fly for forage.
In both cases, managed colonies — hives that humans keep for honey production or commercial pollination – were starving…
Nests are bee nurseries
Female bees build nests to protect their offspring from bad weather, predators, parasites and disease. Bees nest in cavities that they either find or create. Each of the 4,000 bee species found in North America has a unique life history and nesting preferences. Most North American bee species (>70%) nest underground. Ground nesting bees dig tunnels or look for abandoned holes made by other animals. Other bee species prefer to nest aboveground. Females look for hollow twigs, chew tunnels in dead logs or take advantage of preexisting burrows left by wood-boring beetles. Some species search for naturally occurring crevices in stones and trees and will even occupy pinecones or empty snail shells!