@misc{10481/104244,
year = {2025},
month = {8},
url = {https://hdl.handle.net/10481/104244},
abstract = {The rise in global temperature and the increase in atmospheric transport and deposition of dust linked to greater
aridity, land abandonment, and wildfires, are placing significant stress on freshwater microbial communities.
Temperature increases and the nutrients contained in the dust may independently and together alter the
metabolism and structure of these communities. However, dust chemistry is widely variable, and pre-existing
lake conditions will likely influence the response of the algal and microbial communities to added nutrients
and temperature stress. To fill this gap of knowledge, we tested the metabolic and structural response of
phytoplankton in two aquatic ecosystems in the Western United States (Half-Moon Lake and Jordanelle Reservoir),
which have similar trophic status but different biogeochemical properties, in response to two types of
atmospheric dust from the region. The results show that the Temperature × Dust interaction led to greater
cyanobacteria growth in Half-Moon compared to Jordanelle. The effect on metabolism also differed, with Half-
Moon showing a tendency toward heterotrophy, while Jordanelle trended toward autotrophy. Interestingly, our
study reveals that the direction of the response was mainly regulated by each ecosystem’s properties, while the
magnitude of the response was controlled by the type of dust. Through this work, we demonstrate that oligotrophic
freshwater ecosystems are sensitive to dust-nutrient additions leading to cyanobacterial blooms and
highlight the importance of considering watershed biogeochemical properties and exposure to different types of
dust in lake and reservoir management strategies.},
organization = {National Science Foundation (NSF)},
publisher = {Elsevier},
keywords = {Community composition},
keywords = {Metabolic balance},
keywords = {Nutrients},
keywords = {Phytoplankton},
keywords = {Primary production},
keywords = {Temperature},
title = {Diverse dust sources and warming trigger cyanobacteria abundance in freshwater ecosystems in the western United States},
doi = {https://doi.org/10.1016/j.envres.2025.121663},
author = {González Olalla, Juan Manuel and Brahney, Janice},
}