Publication Date:
2021-07-13
Description:
The aim of this study was to investigate the
microbial community thriving at two shallow hydrothermal
vents off Panarea Island (Italy). Physico-chemical characteristics
of thermal waters were examined in order to
establish the effect of the vents on biodiversity of both
Bacteria and Archaea. Water and adjacent sediment samples
were collected at different times from two vents,
characterised by different depth and temperature, and
analysed to evaluate total microbial abundances, sulphuroxidising
and thermophilic aerobic bacteria. Total microbial
abundances were on average of the order of
105 cells ml-1, expressed as picoplanktonic size fraction.
Picophytoplanktonic cells accounted for 0.77–3.83% of the
total picoplanktonic cells. The contribution of bacterial and
archaeal taxa to prokaryotic community diversity was
investigated by PCR–DGGE fingerprinting method. The
number of bands derived from bacterial DNA was highest
in the DGGE profiles of water sample from the warmest
and deepest site (site 2). In contrast, archaeal richness was
highest in the water of the coldest and shallowest site (site
1). Sulphur-oxidising bacteria were detected by both culture-
dependent and -independent methods. The primary
production at the shallow hydrothermal system of Panarea
is supported by a complex microbial community composed
by phototrophs and chemolithotrophs.
Description:
Published
Description:
199-212
Description:
1.2. TTC - Sorveglianza geochimica delle aree vulcaniche attive
Description:
JCR Journal
Description:
reserved
Keywords:
hydrothermal vents
;
bacteria
;
geochemistry
;
fluids
;
03. Hydrosphere::03.03. Physical::03.03.01. Air/water/earth interactions
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
