Diana Harrison Wall (December 27, 1943 – March 25, 2024) was an American environmental scientist and soil ecologist.

She was the founding director of the School of Global Environmental Sustainability,[1] a distinguished biology professor, and senior research scientist at the Natural Resource Ecology Laboratory at Colorado State University.

Wall played a key role in pioneering the study and measurement of anhydrobiosis, which is how nematodes cope physiologically with dry and hot temperatures.

[12] She described invertebrate soil communities in the Dry Valleys of Victoria Land and devised some of the first models of habitat suitability for specific invertebrate species in the Dry Valleys, which increased our understanding of their susceptibility to environmental change and their roles in biogeochemical processes.

[16] Wall received the 2012 Mines Medal from the South Dakota School of Mines and Technology,[17] the Scientific Committee for Antarctic Research President's Medal for Excellence in Antarctic Research,[18][19] and the Soil Ecology Society Professional Achievement Award.

[3][20] Wall was awarded the Tyler Prize for Environmental Achievement in 2013[8] and was inducted into the Colorado Women's Hall of Fame in 2014.

[24][25] Wall chaired the DIVERSITAS-International Biodiversity Observation (2001–2002) and the Global Litter Invertebrate Decomposition Experiment.