http://www.cnr.it/ontology/cnr/individuo/prodotto/ID223596
Microbial biofilm structure and organic matter use in Mediterranean streams (Articolo in rivista)
- Type
- Label
- Microbial biofilm structure and organic matter use in Mediterranean streams (Articolo in rivista) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1007/s10750-012-1302-y (literal)
- Alternative label
Romaní A.M., Amalfitano S., Artigas J., Fazi S., Sabater S., Timoner X.,Ylla I., Zoppini A. (2012)
Microbial biofilm structure and organic matter use in Mediterranean streams
in Hydrobiologia (Dordr., Online)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Romaní A.M., Amalfitano S., Artigas J., Fazi S., Sabater S., Timoner X.,Ylla I., Zoppini A. (literal)
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- A. M. Roman?´ S. Sabate X. Timoner I. Ylla Institute of Aquatic Ecology, University of Girona, Campus de Montilivi, 17071 Girona, Spain e-mail: anna.romani@udg.edu
S. Amalfitano S. Fazi A. Zoppini Water Research Institute (IRSA), National Research Council (CNR), Via Salaria km 29.3-CP10, 00015 Monterotondo, Italy
J. Artigas Irstea, 3 Quai Chauveau CP 220, 69336 Lyon, France
S. Sabater X. Timoner Catalan Institute for Water Research (ICRA), Emili Grahit 101, Edifici H2O Parc Cient?´fic i Tecnolo`gic de la Universitat de Girona, 17003 Girona, Spain (literal)
- Titolo
- Microbial biofilm structure and organic matter use in Mediterranean streams (literal)
- Abstract
- River and stream biofilms in mediterranean
fluvial ecosystems face both extreme seasonality
as well as arrhythmic fluctuations. The hydrological
extremes (droughts and floods) impose direct changes
in water availability but also in the quantity and quality
of organic matter and nutrients that sustain the
microbial growth. This review analyzes how these
ecological pulses might determine unique properties
of biofilms developing in mediterranean streams. The
paper brings together data from heterotrophic and
autotrophic community structure, and extracellular
enzyme activities in biofilms in mediterranean
streams. Mediterranean stream biofilms show higher
use of peptides during the favorable period for epilithic
algae development (spring), and preferential use of
cellulose and hemicellulose in autumn as a response to
allochthonous input. The drying process causes the
reduction in bacterial production and chlorophyll
biomass, but the rapid recovery of both autotrophs
and heterotrophs with rewetting indicates their adaptability
to fluctuations. Bacteria surviving the drought
are mainly associated with sediment and leaf litter
which serve as ''humid refuges''. Some algae and
cyanobacteria show resistant strategies to cope with
the drought stress. The resistance to these fluctuations
is strongly linked to the streambed characteristics
(e.g., sediment grain size, organic matter accumulation,
nutrient content). (literal)
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