2024-03-28T09:49:13Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1749192020-07-09T10:39:01Zcom_10261_5062com_10261_5col_10261_5064
Using a polymer probe characterized by MALDI-TOF/MS to assess river ecosystem functioning: From polymer selection to field tests
Rivas, Daniel
Ginebreda, Antonio
Elosegi, Arturo
Pozo, Jesús
Pérez Solsona, Sandra
Quero, Carmen
Barceló, Damià
European Commission
Ginebreda, Antonio [0000-0003-4714-2850}
Perez, Sandra [0000-0002-3179-3969]
Quero, Carmen [0000-0003-3599-2778]
Barceló, Damià [0000-0002-8873-0491]
Ecosystem functioning
Organic matter decomposition
MALDI-TOF/MS
Polymer degradation
Characterization of river ecosystems must take into consideration both structural and functional aspects. For the latter, a convenient and simple approach for routine monitoring is based on the decomposition of organic matter measured in terms of breakdown of natural organic substrates like leaf litter, wood sticks. Here we extended the method to a synthetic organic material using polymer probes characterized by MALDI-TOF/MS. We first characterized several commercial available polymers, and finally selected polycaprolactonediol 1250 (PCP 1250), a polyester oligomer, as the most convenient for further studies. PCP 1250 was first tested at mesocosms scale under conditions simulating those of the river, with and without nutrient addition for up to 4 weeks. Differences to the starting material measured in terms of changes in the relative ion peak intensities were clearly observed. Ions exhibited a different pattern evolution along time depending on their mass. Greatest changes were observed at longest exposure time and in the nutrient addition treatment. At shorter times, the effect of nutrients (addition or not) was indistinguishable. Finally, we performed an experiment in 11 tributaries of the Ebro River during 97 days of exposure. Principal Component Analysis confirmed the different behavior of ions, which were clustered according to their mass. Exposed samples were clearly different to the standard starting material, but could not be well distinguished among each other. Polymer mass loss rates, as well as some environmental variables such as conductivity, temperature and flow were correlated with some peak intensities. Overall, the interpretation of field results in terms of environmental conditions remains elusive, due to the influence of multiple concurrent factors. Nevertheless, breakdown of synthetic polymers opens an interesting field of research, which can complement more traditional breakdown studies to assess river ecosystem functioning. © 2016 The Authors
This study has been financially supported by the EU through the FP7 project GLOBAQUA (Grant agreement No 603629 ), and by the Generalitat de Catalunya (Consolidated Research Groups “ 2014 SGR 418 —Water and Soil Quality Unit” and 2014 SGR 291 —ICRA). It reflects only the author's views. The Community is not liable for any use that may be made of the information contained therein. The authors are thankful to Maria Casellas (Experimental Streams Facility, Catalan Institute for Water Research, Girona, Spain) for her technical help in the operation of the artificial streams. Appendix A
Peer reviewed
2019-01-30T07:24:55Z
2019-01-30T07:24:55Z
2016-12-15
artículo
http://purl.org/coar/resource_type/c_6501
Science of the Total Environment 573: 532-540 (2016)
http://hdl.handle.net/10261/174919
10.1016/j.scitotenv.2016.08.135
http://dx.doi.org/10.13039/501100000780
en
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/FP7/603629
Publisher's version
https://doi.org/10.1016/j.scitotenv.2016.08.135
Sí
open
Elsevier