Extracellular polymeric substances in antarctic environments: A review of their ecological roles and impact on glacier biogeochemical cycles.
PUBLISHED Antarctic continent comprises diverse ecosystems like snow, glacier ice, sea ice, melt pools, glacial soils, supraglacial and subglacial lakes that accommodate numerous microbial and algal communities. These biotic groups secrete matrices of biomacromolecules called Extracellular Polymeric...
Main Author: | |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | http://hdl.handle.net/2262/96602 https://www.sciencedirect.com/science/article/abs/pii/S1873965221000633?via%3Dihub http://people.tcd.ie/nagars |
id |
fttrinitycoll:oai:tara.tcd.ie:2262/96602 |
---|---|
record_format |
openpolar |
spelling |
fttrinitycoll:oai:tara.tcd.ie:2262/96602 2023-05-15T13:40:00+02:00 Extracellular polymeric substances in antarctic environments: A review of their ecological roles and impact on glacier biogeochemical cycles. Nagar, Shipra 2021 100686 http://hdl.handle.net/2262/96602 https://www.sciencedirect.com/science/article/abs/pii/S1873965221000633?via%3Dihub http://people.tcd.ie/nagars en eng Polar Science; Shipra Nagar, Runa Antony, Meloth Thamban, Extracellular polymeric substances in antarctic environments: A review of their ecological roles and impact on glacier biogeochemical cycles., Polar Science, 2021, 100686- 1873-9652 Y https://www.sciencedirect.com/science/article/abs/pii/S1873965221000633?via%3Dihub http://hdl.handle.net/2262/96602 http://people.tcd.ie/nagars 229852 orcid:0000-0003-3132-4211 Y openAccess Extracellular Polymeric Substances Exopolysaccharides Chemical functionalities Dissolved organic matter Cryoconite Journal Article scholarly_publications refereed_publications 2021 fttrinitycoll 2021-06-24T22:52:46Z PUBLISHED Antarctic continent comprises diverse ecosystems like snow, glacier ice, sea ice, melt pools, glacial soils, supraglacial and subglacial lakes that accommodate numerous microbial and algal communities. These biotic groups secrete matrices of biomacromolecules called Extracellular Polymeric Substances (EPSs), which enhance their ability to withstand extreme environmental conditions. EPSs are mainly composed of exopolysaccharides, proteins, lipids and nucleic acids, and exhibit assorted activities due to diverse functionalities of matrix like spatial conformation, molecular weight, rheology, charge, size and affinity. Several protective and ecological functions such as cryoprotection, anti-desiccation, buffering against high salinity and pH, trace metal uptake and binding, sequestration of dissolved organic matter and nutrients, aggregate formation and biofilm production have been attributed to microbial EPSs. They also contribute to production of dissolved and particulate organic matter and hence can influence biogeochemical cycling of elements, especially carbon and iron. Further, they aid in aggregation of dust particles on the glacier surface, substantially reducing the albedo of the ice and thereby accelerate melting of glaciers. This study provides an overview of role of EPSs in Antarctic ecosystems, its ecological significance and chemical functionalities, and discusses the approach for a better understanding of relevance of EPSs in biogeochemistry of Antarctic environments. Article in Journal/Newspaper Antarc* Antarctic Polar Science Polar Science Sea ice The University of Dublin, Trinity College: TARA (Trinity's Access to Research Archive) Antarctic |
institution |
Open Polar |
collection |
The University of Dublin, Trinity College: TARA (Trinity's Access to Research Archive) |
op_collection_id |
fttrinitycoll |
language |
English |
topic |
Extracellular Polymeric Substances Exopolysaccharides Chemical functionalities Dissolved organic matter Cryoconite |
spellingShingle |
Extracellular Polymeric Substances Exopolysaccharides Chemical functionalities Dissolved organic matter Cryoconite Nagar, Shipra Extracellular polymeric substances in antarctic environments: A review of their ecological roles and impact on glacier biogeochemical cycles. |
topic_facet |
Extracellular Polymeric Substances Exopolysaccharides Chemical functionalities Dissolved organic matter Cryoconite |
description |
PUBLISHED Antarctic continent comprises diverse ecosystems like snow, glacier ice, sea ice, melt pools, glacial soils, supraglacial and subglacial lakes that accommodate numerous microbial and algal communities. These biotic groups secrete matrices of biomacromolecules called Extracellular Polymeric Substances (EPSs), which enhance their ability to withstand extreme environmental conditions. EPSs are mainly composed of exopolysaccharides, proteins, lipids and nucleic acids, and exhibit assorted activities due to diverse functionalities of matrix like spatial conformation, molecular weight, rheology, charge, size and affinity. Several protective and ecological functions such as cryoprotection, anti-desiccation, buffering against high salinity and pH, trace metal uptake and binding, sequestration of dissolved organic matter and nutrients, aggregate formation and biofilm production have been attributed to microbial EPSs. They also contribute to production of dissolved and particulate organic matter and hence can influence biogeochemical cycling of elements, especially carbon and iron. Further, they aid in aggregation of dust particles on the glacier surface, substantially reducing the albedo of the ice and thereby accelerate melting of glaciers. This study provides an overview of role of EPSs in Antarctic ecosystems, its ecological significance and chemical functionalities, and discusses the approach for a better understanding of relevance of EPSs in biogeochemistry of Antarctic environments. |
format |
Article in Journal/Newspaper |
author |
Nagar, Shipra |
author_facet |
Nagar, Shipra |
author_sort |
Nagar, Shipra |
title |
Extracellular polymeric substances in antarctic environments: A review of their ecological roles and impact on glacier biogeochemical cycles. |
title_short |
Extracellular polymeric substances in antarctic environments: A review of their ecological roles and impact on glacier biogeochemical cycles. |
title_full |
Extracellular polymeric substances in antarctic environments: A review of their ecological roles and impact on glacier biogeochemical cycles. |
title_fullStr |
Extracellular polymeric substances in antarctic environments: A review of their ecological roles and impact on glacier biogeochemical cycles. |
title_full_unstemmed |
Extracellular polymeric substances in antarctic environments: A review of their ecological roles and impact on glacier biogeochemical cycles. |
title_sort |
extracellular polymeric substances in antarctic environments: a review of their ecological roles and impact on glacier biogeochemical cycles. |
publishDate |
2021 |
url |
http://hdl.handle.net/2262/96602 https://www.sciencedirect.com/science/article/abs/pii/S1873965221000633?via%3Dihub http://people.tcd.ie/nagars |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Polar Science Polar Science Sea ice |
genre_facet |
Antarc* Antarctic Polar Science Polar Science Sea ice |
op_relation |
Polar Science; Shipra Nagar, Runa Antony, Meloth Thamban, Extracellular polymeric substances in antarctic environments: A review of their ecological roles and impact on glacier biogeochemical cycles., Polar Science, 2021, 100686- 1873-9652 Y https://www.sciencedirect.com/science/article/abs/pii/S1873965221000633?via%3Dihub http://hdl.handle.net/2262/96602 http://people.tcd.ie/nagars 229852 orcid:0000-0003-3132-4211 |
op_rights |
Y openAccess |
_version_ |
1766126855346192384 |