Ultrastructural and Biogeochemical Features of Microbiotic Soil Crusts and their Implications in a Semi-Arid Habitat

Ultrastructural and Biogeochemical Features of Microbiotic Soil Crusts and their Implications in a Semi-Arid Habitat

14 pages, figures, and tables statistics.

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Main Authors: Souza-Egipsy, Virginia, Ascaso, Carmen, Wierzchos, Jacek
Format: artículo biblioteca
Language:English
Published: Taylor & Francis 2002
Subjects:Biogeochemistry, Fungi, Lichens, Microalgae, Microbiotic crust, Soil crust, Ultrastructure,
Online Access:http://hdl.handle.net/10261/31823
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spelling dig-ica-es-10261-318232019-08-06T10:30:00Z Ultrastructural and Biogeochemical Features of Microbiotic Soil Crusts and their Implications in a Semi-Arid Habitat Souza-Egipsy, Virginia Ascaso, Carmen Wierzchos, Jacek Biogeochemistry Fungi Lichens Microalgae Microbiotic crust Soil crust Ultrastructure 14 pages, figures, and tables statistics. This investigation was designed to explore the relationships between lichen symbionts (phycobiont and mycobiont) and the substrate on which they grow by examining the chemical and ultrastructural features of the lichen-soil interface. These lichens form an integral part of microbiotic soil crusts. Fragments of three different lichen biotypes growing over gypsum crystals and marls were xed and embedded in resin. The lichensubstratuminterface was then examined by scanning electron microscopy with backscattered electron imaging. In situ observation, microanalytical (EDS), and FT-Raman plus infrared spectroscopy of the lichen-substratum interface indicated that different ultrastructural features of the mycobiont were related to biogeochemical processes and Ca2C distribution in the soil crust. Phycobionts were observed to make direct contact with the substratum and to be surrounded by a nondifferentiated thallus structure. These observations suggest that they can grow outside the thallus in the early stages of lichen development in the semi-arid conditions of their habitat. The particular ultrastructural features of the lichen thallus and of the lichen-substratum interface appear to have marked effects on runoff phenomena and ponding generation of the surface. Peer reviewed 2011-02-01T11:36:33Z 2011-02-01T11:36:33Z 2002 artículo http://purl.org/coar/resource_type/c_6501 Geomicrobiology Journal 19: 567-580 (2002) 0149-0451 http://hdl.handle.net/10261/31823 10.1080/01-490450290098568 en http://dx.doi.org/10.1080/01490450290098568 none Taylor & Francis
institution ICA ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-ica-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICA España
language English
topic Biogeochemistry
Fungi
Lichens
Microalgae
Microbiotic crust
Soil crust
Ultrastructure
Biogeochemistry
Fungi
Lichens
Microalgae
Microbiotic crust
Soil crust
Ultrastructure
spellingShingle Biogeochemistry
Fungi
Lichens
Microalgae
Microbiotic crust
Soil crust
Ultrastructure
Biogeochemistry
Fungi
Lichens
Microalgae
Microbiotic crust
Soil crust
Ultrastructure
Souza-Egipsy, Virginia
Ascaso, Carmen
Wierzchos, Jacek
Ultrastructural and Biogeochemical Features of Microbiotic Soil Crusts and their Implications in a Semi-Arid Habitat
description 14 pages, figures, and tables statistics.
format artículo
topic_facet Biogeochemistry
Fungi
Lichens
Microalgae
Microbiotic crust
Soil crust
Ultrastructure
author Souza-Egipsy, Virginia
Ascaso, Carmen
Wierzchos, Jacek
author_facet Souza-Egipsy, Virginia
Ascaso, Carmen
Wierzchos, Jacek
author_sort Souza-Egipsy, Virginia
title Ultrastructural and Biogeochemical Features of Microbiotic Soil Crusts and their Implications in a Semi-Arid Habitat
title_short Ultrastructural and Biogeochemical Features of Microbiotic Soil Crusts and their Implications in a Semi-Arid Habitat
title_full Ultrastructural and Biogeochemical Features of Microbiotic Soil Crusts and their Implications in a Semi-Arid Habitat
title_fullStr Ultrastructural and Biogeochemical Features of Microbiotic Soil Crusts and their Implications in a Semi-Arid Habitat
title_full_unstemmed Ultrastructural and Biogeochemical Features of Microbiotic Soil Crusts and their Implications in a Semi-Arid Habitat
title_sort ultrastructural and biogeochemical features of microbiotic soil crusts and their implications in a semi-arid habitat
publisher Taylor & Francis
publishDate 2002
url http://hdl.handle.net/10261/31823
work_keys_str_mv AT souzaegipsyvirginia ultrastructuralandbiogeochemicalfeaturesofmicrobioticsoilcrustsandtheirimplicationsinasemiaridhabitat
AT ascasocarmen ultrastructuralandbiogeochemicalfeaturesofmicrobioticsoilcrustsandtheirimplicationsinasemiaridhabitat
AT wierzchosjacek ultrastructuralandbiogeochemicalfeaturesofmicrobioticsoilcrustsandtheirimplicationsinasemiaridhabitat
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