Dark matters: Contrasting responses of stream biofilm to browning and loss of riparian shading.
DOC
fatty acids
forestry
mesocosm experiment
multiple stressors
periphyton
Journal
Global change biology
ISSN: 1365-2486
Titre abrégé: Glob Chang Biol
Pays: England
ID NLM: 9888746
Informations de publication
Date de publication:
09 2022
09 2022
Historique:
revised:
09
04
2022
received:
21
12
2021
accepted:
17
05
2022
pubmed:
29
5
2022
medline:
4
8
2022
entrez:
28
5
2022
Statut:
ppublish
Résumé
Concentrations of terrestrial-derived dissolved organic carbon (DOC) in freshwater ecosystems have increased consistently, causing freshwater browning. The mechanisms behind browning are complex, but in forestry-intensive regions browning is accelerated by land drainage. Forestry actions in streamside riparian forests alter canopy shading, which together with browning is expected to exert a complex and largely unpredictable control over key ecosystem functions. We conducted a stream mesocosm experiment with three levels of browning (ambient vs. moderate vs. high, with 2.7 and 5.5-fold increase, respectively, in absorbance) crossed with two levels of riparian shading (70% light reduction vs. open canopy) to explore the individual and combined effects of browning and loss of shading on the quantity (algal biomass) and nutritional quality (polyunsaturated fatty acid and sterol content) of the periphytic biofilm. We also conducted a field survey of differently colored (4.7 to 26.2 mg DOC L
Identifiants
pubmed: 35624548
doi: 10.1111/gcb.16279
pmc: PMC9545655
doi:
Substances chimiques
Sterols
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
5159-5171Informations de copyright
© 2022 The Authors. Global Change Biology published by John Wiley & Sons Ltd.
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