@misc{10481/109679,
year = {2023},
month = {3},
url = {https://hdl.handle.net/10481/109679},
abstract = {Browning and nutrient inputs from extreme rainfall, together with increased vertical mixing
due to strong winds, are more frequent in coastal ecosystems; however, their interactive effects
on phytoplankton are poorly understood. We conducted experiments to quantify how brown-
ing, together with different mixing speeds (fluctuating radiation), and a nutrient pulse alter
primary productivity and photosynthetic efficiency in estuarine phytoplankton communities.

Phytoplankton communities (grazers excluded) were exposed simultaneously to these dri-
vers, and key photosynthetic targets were quantified: oxygen production, electron transport
rates (ETRs), and carbon fixation immediately following collection and after a 2-d acclima-
tion/adaptation period.

Increasing mixing speeds in a turbid water column (e.g. browning) significantly decreased
ETRs and carbon fixation in the short term. Acclimation/adaptation to this condition for 2 d
resulted in an increase in nanoplanktonic diatoms and a community that was photosyntheti-
cally more efficient; however, this did not revert the decreasing trend in carbon fixation with
increased mixing speed.

The observed interactive effects (resulting from extreme rainfall and strong winds) may
have profound implications in the trophodynamics of highly productive system such as the
Southwest Atlantic Ocean due to changes in the size structure of the community and reduced
productivity.},
keywords = {Acclimation/adaptation},
keywords = {Carbon fixation},
keywords = {Electron transport rates},
keywords = {Environmental drivers},
keywords = {Global change},
keywords = {Net community production},
keywords = {Photosynthesis},
keywords = {Southwest Atlantic Ocean},
title = {Browning, nutrient inputs, and fast vertical mixing from simulated extreme rainfall and wind stress alter estuarine phytoplankton productivity},
doi = {https://doi.org/10.1111/nph.18874},
author = {Helbling, E. W. and Banaszak, A. T. and Valiñas, M. S. and Vizzo, J. I. and Villafañe, V. E. and Jabalera Cabrerizo, Marco},
}