http://www.cnr.it/ontology/cnr/individuo/prodotto/ID275965
Comparative microbial community composition from secondary carbonate (moonmilk) deposits: implications for the Cansiliella servadeii cave hygropetric food web (Articolo in rivista)
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- Comparative microbial community composition from secondary carbonate (moonmilk) deposits: implications for the Cansiliella servadeii cave hygropetric food web (Articolo in rivista) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
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- Annette Summers Engel; Maurizio G. Paoletti; Mattia Beggio; Luca Dorigo; Alberto Pamio; Tiziano Gomiero; Claudio Furlan; Mauro Brilli; Angelo Leandro Dreon; Roberto Bertoni; Andrea Squartini (literal)
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- http://dx.doi.org/10.5038/1827-806X.42.3.2 (literal)
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- 1 Annette Summers Engel: Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37996 USA;
2 Maurizio G.Paoletti, Mattia Beggio, Alberto Pamio, Tiziano Gomiero, Claudio Furlan, Angelo L. Dreon: Dipartimento di Biologia, Università di Padova, Agroecology and Ethnobiology, Padova 35100 Italy;
3 Luca Dorigo: Museo di Storia Naturale di Udine, Udine 33100 Italy;
4 Mauro Brilli: Instituto di Geologia Ambientale e Geoingegneria, Dipartimento di Scienze della Terra, Università La Sapienza di Roma, Roma 00185 Italy;
5 Roberto Bertoni: CNR Istituto per lo Studio degli Ecosistemi Largo Tonolli 50, Verbania Pallanza 28922 Italy;
6 Andrea Squartini: Dipartimento di Agronomia Animali Alimenti Risorse Naturali e Ambiente, Università di Padova - Agripolis, Viale dell'Università, 16, 10 Legnaro
(Padova) 35020 Italy (literal)
- Titolo
- Comparative microbial community composition from secondary carbonate (moonmilk) deposits: implications for the Cansiliella servadeii cave hygropetric food web (literal)
- Abstract
- The microbial diversity of moonmilk, a hydrated calcium carbonate speleothem, was
evaluated from two Italian caves to provide context for the food web of highly-specialized
troglobitic beetles, Cansiliella spp. (Leptodirinae), with distinctive carbon and nitrogen isotope
values indicative of a novel food source. The moonmilk and associated percolating waters
had low to no extractable chlorophyll, with an average organic C:N ratio of 9, indicating limited
allochthonous input and a significant contribution from microbial biomass. The biomass
from moonmilk was estimated to be ~104 micro- and meiofaunal individuals per m2 and
~107 microbial cells/ml. Proteobacteria dominated the 16S rRNA gene sequences retrieved
from the moonmilk from both caves. The distribution of other proteobacterial classes and
phyla in the moonmilk were statistically similar to each other, even though the two caves
are geographically separated from each other. Comparing the moonmilk gene sequences to
sequences from previously described environmental clones or cultured strains revealed the
uniqueness of the moonmilk habitat, as ~15% of all of the moonmilk sequences were more
closely related to each other than to sequences retrieved from any other habitat. However,
comparative analyses confirmed that as much as ~34% of the clones sequences were also
closely related to environmental clones and cultured strains derived from soil and freshwater
habitats, which is likely due to the fact that the putative inoculation source for the moonmilk
bacterial communities is from overlying soil and percolating fluids from the surface. Prior to
our studies of Cansiliella spp., moonmilk has not been considered a food source for cave
animals. Our findings provide unique insight into moonmilk microbial diversity that could
reveal the underpinnings of the moonmilk carbon and nitrogen cycle that influences the
isotopic composition and the morphological adaptations of the troglobitic beetles associated
with the moonmilk. (literal)
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