Earth Systems Science

About 4.5 billion people around the globe do not have access to adequate sanitation, and what they do have — typically pit latrines and lagoons — are responsible for widespread illnesses and a portion of the greenhouse gases that are warming the planet.

UC Merced Professor Rebecca Ryals and a group of colleagues have a solution that not only increases safety, sustainability and jobs, but reduces greenhouse gas emissions and waste-borne illnesses while producing an effective fertilizer for agriculture.

UC Merced Professor Peggy O’Day hopes to improve water quality in the California Delta by studying local wetlands.

O’Day is leading a new three-year study of Merced County wetlands that drain into the San Joaquin River and eventually the Delta.

Soil biogeochemistry Professor Asmeret Asefaw Berhe has been named the Ted and Jan Falasco Chair in Earth Sciences and Geology.

“The Falasco family is engaged in construction and development, so they have an intimate connection with and an understanding of the earth beneath our feet,” Berhe said. “Not only are they generous with their hard-earned resources, they are investing in a worthy cause for the Valley. They appreciate how invested we all should be in the land and the Earth.”

Soil is one of the foundations of life on Earth and could be an important part of the solution to climate change, if only we can stop treating it like dirt.

The most extreme drought event in hundreds of years caused a catastrophic die-off of the Sierra Nevada’s mature trees in 2015-2016.

A study published today in Nature Geoscience details how UC Merced Professor Roger Bales and his colleague Professor Michael Goulden from UC Irvine tracked the progress of the devastation caused by years of dry conditions combined with abnormally warm temperatures.

Climate change is bad news for forests, and a new study by UC Merced Professor Emily Moran demonstrates one aspect of that news.

Higher summer temperatures hurt tree seedlings’ growth and survival.

But whether that is entirely bad depends on the degree of change in the number of young trees.

A nine-year experiment by a UC Merced Department of Life and Environmental Sciences professor and his colleagues is illuminating the importance of soil carbon in maintaining healthy and functioning ecosystems because of its influence on the microbial communities that live in soil.

These communities’ health can help researchers understand the effects of climate change.

Most people wouldn’t think sharks can teach researchers about the planet’s distant past and its more immediate future.

UC Merced paleoecologist Professor Sora Kim isn’t most people.

There’s a connection between data in fossilized shark teeth and climate change, and thanks to a grant from the National Science Foundation, she aims to use that information to better understand climate change.

Graduate student Vicky Espinoza shared the plight of some San Joaquin Valley families with a wide audience this spring in her role as a Next Generation delegate to this year’s Chicago Council on Global Affairs Global Food Security Symposium, entitled “From Scarcity to Security: Managing Water for a Nutritious Food Future.”

A rigorous, first-of-its-kind global study provides new insights into the natural history of soil biodiversity and shows that changes in soil pH during soil development is a major driver of most of that biodiversity.