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Plant consumers play unexpectedly large role in the evolution of seedling success


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IMAGE: At UC San Diego s Biology Field Station, scientists tested California grasses in plots that allowed or excluded the influence of birds, mice, rabbits and other plant consumers.
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Credit: Cleland Lab, UC San Diego
For young plants, timing is just about everything. Now, scientists have found that herbivores, animals that consume plants, have a lot to say about evolution at this vulnerable life stage.
Once a plant seedling breaches the soil surface and begins to grow, a broad range of factors will determine whether it thrives or perishes.
Scientists have long perceived that natural selection favors early rising seeds. Seedlings that emerge early in the growing season should have a competitive advantage in monopolizing precious soil resources. Early growth also should mean more access to light, since early growers can block sunlight for seedlings that emerge later in the season. ....

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CLIMATE IMPACTS: EPA: Heat waves are a growing danger to cities


Published: Thursday, May 13, 2021
EPA is now including urban heat, and the heat island effect, as an indicator of climate change a move some say shows the agency is serious about addressing health inequities caused by warming.
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Adapting to Extreme Climate Change Poses a Challenge to Many Farmers


Adapting to Extreme Climate Change Poses a Challenge to Many Farmers
Written by AZoCleantechMay 12 2021
Severe weather conditions are affecting agriculture in the United Kingdom, but according to a new study, a majority of farmers are yet to prioritize the adaptability to the impacts of the climate emergency.
Image Credit: Tanja Esser/Shutterstock.com
According to all the farmers who participated in the study, they had witnessed or experienced problems caused by extreme weather, like prolonged dry spells or heavy in recent years, and anticipated these to increase further.
Several farmers were also concerned about the effect of drought and heat on the growth of grasses and crops, with knock-on impacts for winter animal feed and yield, and the implications of flooding and heavy rainfall for run-off and erosion of soil and for field operations, like harvesting and drilling. ....

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