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https://hdl.handle.net/2440/123409
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dc.contributor.author | Paterson, J.S. | - |
dc.contributor.author | Nayar, S. | - |
dc.contributor.author | Mitchell, J.G. | - |
dc.contributor.author | Seuront, L. | - |
dc.date.issued | 2013 | - |
dc.identifier.citation | Journal of Marine Systems, 2013; 113-114:52-61 | - |
dc.identifier.issn | 0924-7963 | - |
dc.identifier.issn | 1879-1573 | - |
dc.identifier.uri | http://hdl.handle.net/2440/123409 | - |
dc.description.abstract | Coastal upwelling systems play an essential role in bringing cold and nutrient-rich water into the euphotic zone, hence enhancing the biological productivity of the world's oceans. We describe a “cryptic” upwelling occurring in South Australian waters, in which cold upwelled waters do not reach surface waters and do not exhibit a sea surface temperature (SST) signature. Due to the wide continental shelf (ca. 100 km), upwelled waters form a sub-surface cold water pool and are forced north-west after a secondary event. Using flow cytometry we investigated the abundance and composition of viruses, heterotrophic bacteria and pico-phytoplankton within upwelling affected and unaffected waters. Our results identified the presence of upwelled waters at and below the Deep-Chlorophyll Maximum (DCM), where water temperature was at least 4 °C colder than surface waters. In contrast to previous studies, no significant differences were observed between upwelled and non-upwelled waters for most individual viral, bacterial and pico-phytoplankton sub-groups. However, one viral, one bacterial and two pico-phytoplankton sub-groups were significantly more abundant at the DCM. This indicates the presence of depth- and population-specific shifts in abundance and potential niche partitioning of these cytometrically-defined sub-groups that may be related to their host organisms and/or resource availability. | - |
dc.description.statementofresponsibility | James S. Paterson, Sasi Nayar, James G. Mitchell, Laurent Seuront | - |
dc.language.iso | en | - |
dc.publisher | Elsevier | - |
dc.rights | © 2013 Elsevier B.V. All rights reserved. | - |
dc.source.uri | http://dx.doi.org/10.1016/j.jmarsys.2012.12.009 | - |
dc.subject | Coastal upwelling; cryptic; viruses; bacteria; pico-phytoplankton; flow cytometry | - |
dc.title | Population-specific shifts in viral and microbial abundance within a cryptic upwelling | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1016/j.jmarsys.2012.12.009 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP0664681 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP0988554 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Nayar, S. [0000-0002-3730-6682] | - |
Appears in Collections: | Aurora harvest 4 Environment Institute publications |
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