NDLI: Ecosystem processes drive dissolved organic matter quality in a highly dynamic water body

Content Provider	Springer Nature Link
Author	Catalán, Núria Obrador, Biel Pretus, Joan Ll.
Copyright Year	2014
Abstract	The complexity and variability of processes determining dissolved organic matter (DOM) quality is likely to increase in highly dynamic systems such as Mediterranean water bodies. We studied the dynamics of DOM in a Mediterranean lagoon dominated by seasonal submerged vegetation and receiving torrential freshwater inputs. In order to trace changes in DOM quality throughout the year in relation with potential DOM sources, we used spectroscopic techniques including UV–visible absorbance and fluorescence excitation–emission matrices. The quality of the lagoon DOM fluctuates on a seasonal basis between the characteristics of torrential inputs and macrophytes. Humification and aromaticity of DOM increased markedly after the torrential inputs of materials derived from terrestrial vegetation and soils in the catchment. The macrophytes in the lagoon contributed with less humified materials and protein-like compounds. Other minor processes such as seawater entrances, photodegradation or temporary bottom hypoxia translated into sporadic DOM quality changes. These results highlight the need of a whole ecosystem approach to understand changes in DOM quality due to ecosystem processes that might otherwise be exclusively attributed to DOM reactivity.
Starting Page	111
Ending Page	124
Page Count	14
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	728
Issue Number	1
e-ISSN	15735117
Language	English
Publisher	Springer International Publishing
Publisher Date	2014-02-06
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Shallow lake Dissolved organic carbon Spectroscopic descriptors Mediterranean Torrential episodes Macrophyte Freshwater & Marine Ecology Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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