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Title: Multiple biomarkers highlight the importance of water column processes in treatment wetland organic matter cycling

Abstract

A suite of biomarkers, including amino acids, pigments, and lignin phenols coupled with high resolution mass spectrometry were used to evaluate differences in the sources and fate of organic matter (OM) in Everglades treatment wetlands as a model for OM cycling in shallow water wetlands. Five components of the system (water column particulate organic matter, vertical traps, flocculent material, periphyton, and surface soil) were assessed for OM transformations down-profile (i.e. water column to soil) and between treatment cells dominated by emergent aquatic vegetation (EAV) and submerged aquatic vegetation (SAV), with comparisons to reference sites that resemble historic Everglades conditions. We found that OM cycling is fundamentally different between EAV and SAV wetlands, and that SAV wetlands have some shared characteristics with similar habitats in the Everglades. Other than locations densely populated by Typha spp., water column particulate organic C was derived from microbial/cryptomonad sources, rather than macroscopic sources (vascular plants and algal mats). Bacterial amino acid biomarkers were positively correlated with amino acid degradation indices and organic P (Po), respectively suggesting that microbial abundance is associated with "fresher" OM, and that further investigation into relationships between microbial biomass and Po is warranted. Overall, this multi-biomarker approach can evaluate the relativemore » "freshness" of OM pools, identify sources of OM, and highlight the importance of water column processes in shallow water wetlands.« less

Authors:
 [1];  [1];  [1]; ORCiD logo [2];  [1];  [2];  [2]
  1. University of Florida
  2. BATTELLE (PACIFIC NW LAB)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1582596
Report Number(s):
PNNL-SA-146989
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Water Research
Additional Journal Information:
Journal Volume: 168
Country of Publication:
United States
Language:
English
Subject:
treatment wetlands, organic matter, Everglades, amino acids, pigments, lignin

Citation Formats

Morrison, Elise, Shields, Michael, Bianchi, Thomas S., Liu, Yina, Newman, Susan, Tolic, Nikola, and Chu, Rosalie K. Multiple biomarkers highlight the importance of water column processes in treatment wetland organic matter cycling. United States: N. p., 2020. Web. doi:10.1016/j.watres.2019.115153.
Morrison, Elise, Shields, Michael, Bianchi, Thomas S., Liu, Yina, Newman, Susan, Tolic, Nikola, & Chu, Rosalie K. Multiple biomarkers highlight the importance of water column processes in treatment wetland organic matter cycling. United States. doi:10.1016/j.watres.2019.115153.
Morrison, Elise, Shields, Michael, Bianchi, Thomas S., Liu, Yina, Newman, Susan, Tolic, Nikola, and Chu, Rosalie K. Wed . "Multiple biomarkers highlight the importance of water column processes in treatment wetland organic matter cycling". United States. doi:10.1016/j.watres.2019.115153.
@article{osti_1582596,
title = {Multiple biomarkers highlight the importance of water column processes in treatment wetland organic matter cycling},
author = {Morrison, Elise and Shields, Michael and Bianchi, Thomas S. and Liu, Yina and Newman, Susan and Tolic, Nikola and Chu, Rosalie K.},
abstractNote = {A suite of biomarkers, including amino acids, pigments, and lignin phenols coupled with high resolution mass spectrometry were used to evaluate differences in the sources and fate of organic matter (OM) in Everglades treatment wetlands as a model for OM cycling in shallow water wetlands. Five components of the system (water column particulate organic matter, vertical traps, flocculent material, periphyton, and surface soil) were assessed for OM transformations down-profile (i.e. water column to soil) and between treatment cells dominated by emergent aquatic vegetation (EAV) and submerged aquatic vegetation (SAV), with comparisons to reference sites that resemble historic Everglades conditions. We found that OM cycling is fundamentally different between EAV and SAV wetlands, and that SAV wetlands have some shared characteristics with similar habitats in the Everglades. Other than locations densely populated by Typha spp., water column particulate organic C was derived from microbial/cryptomonad sources, rather than macroscopic sources (vascular plants and algal mats). Bacterial amino acid biomarkers were positively correlated with amino acid degradation indices and organic P (Po), respectively suggesting that microbial abundance is associated with "fresher" OM, and that further investigation into relationships between microbial biomass and Po is warranted. Overall, this multi-biomarker approach can evaluate the relative "freshness" of OM pools, identify sources of OM, and highlight the importance of water column processes in shallow water wetlands.},
doi = {10.1016/j.watres.2019.115153},
journal = {Water Research},
number = ,
volume = 168,
place = {United States},
year = {2020},
month = {1}
}