Comparison of (a) primary production and (b) secondary production (measured as BPthy) between layers of meromictically stratified ponds
Figure 1. Comparison of (a) primary production and (b) secondary production (measured as BPthy) between layers of meromictically stratified ponds. Mean values with standard deviations ( n = 4). Abstract We compared planktonic primary and secondary production across twenty meltwater ponds on the surf...
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ftdatacite:10.6084/m9.figshare.1011883.v1 2023-05-15T16:41:55+02:00 Comparison of (a) primary production and (b) secondary production (measured as BPthy) between layers of meromictically stratified ponds Sorrell, Brian K Hawes, Ian Safi, Karl 2013 https://dx.doi.org/10.6084/m9.figshare.1011883.v1 https://iop.figshare.com/articles/figure/_Comparison_of_a_primary_production_and_b_secondary_production_measured_as_BPthy_between_layers_of_m/1011883/1 unknown IOP Publishing https://dx.doi.org/10.6084/m9.figshare.1011883 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Environmental Science Image Figure graphic ImageObject 2013 ftdatacite https://doi.org/10.6084/m9.figshare.1011883.v1 https://doi.org/10.6084/m9.figshare.1011883 2021-11-05T12:55:41Z Figure 1. Comparison of (a) primary production and (b) secondary production (measured as BPthy) between layers of meromictically stratified ponds. Mean values with standard deviations ( n = 4). Abstract We compared planktonic primary and secondary production across twenty meltwater ponds on the surface of the McMurdo Ice Shelf in January 2007, including some ponds with basal brines created by meromictic stratification. Primary production ranged from 1.07 to 65.72 mgC m −3 h −1 in surface waters. In stratified ponds primary production was always more than ten times higher in basal brines than in the corresponding mixolimnion. Regression tree analysis ( r 2 = 0.80) identified inorganic nitrogen (as {\mathrm{NH}}_{4}^{+}) as the main factor limiting planktonic primary production. However, there was also evidence of inorganic carbon co-limitation of photosynthesis in some of the more oligotrophic waters. Neither C nor N limited carbon fixation at [NH 4 –N] > 50 mg m −3 , with photoinhibition the factor most likely limiting photosynthesis under such conditions. Primary production was the only factor significantly correlated to bacterial production and the relationship ( r 2 = 0.56) was non-linear. Nitrogen limitation and tight coupling of planktonic primary and bacterial production is surprising in these ponds, as all have large pools of dissolved organic carbon (1.2–260 g m −3 ) and organic nitrogen (all >130 mg m −3 ). The dissolved pools of organic carbon and nitrogen appear to be recalcitrant and bacterial production to be constrained by limited release of labile organics from phytoplankton. Still Image Ice Shelf McMurdo Ice Shelf DataCite Metadata Store (German National Library of Science and Technology) McMurdo Ice Shelf ENVELOPE(166.500,166.500,-78.000,-78.000) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
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unknown |
topic |
Environmental Science |
spellingShingle |
Environmental Science Sorrell, Brian K Hawes, Ian Safi, Karl Comparison of (a) primary production and (b) secondary production (measured as BPthy) between layers of meromictically stratified ponds |
topic_facet |
Environmental Science |
description |
Figure 1. Comparison of (a) primary production and (b) secondary production (measured as BPthy) between layers of meromictically stratified ponds. Mean values with standard deviations ( n = 4). Abstract We compared planktonic primary and secondary production across twenty meltwater ponds on the surface of the McMurdo Ice Shelf in January 2007, including some ponds with basal brines created by meromictic stratification. Primary production ranged from 1.07 to 65.72 mgC m −3 h −1 in surface waters. In stratified ponds primary production was always more than ten times higher in basal brines than in the corresponding mixolimnion. Regression tree analysis ( r 2 = 0.80) identified inorganic nitrogen (as {\mathrm{NH}}_{4}^{+}) as the main factor limiting planktonic primary production. However, there was also evidence of inorganic carbon co-limitation of photosynthesis in some of the more oligotrophic waters. Neither C nor N limited carbon fixation at [NH 4 –N] > 50 mg m −3 , with photoinhibition the factor most likely limiting photosynthesis under such conditions. Primary production was the only factor significantly correlated to bacterial production and the relationship ( r 2 = 0.56) was non-linear. Nitrogen limitation and tight coupling of planktonic primary and bacterial production is surprising in these ponds, as all have large pools of dissolved organic carbon (1.2–260 g m −3 ) and organic nitrogen (all >130 mg m −3 ). The dissolved pools of organic carbon and nitrogen appear to be recalcitrant and bacterial production to be constrained by limited release of labile organics from phytoplankton. |
format |
Still Image |
author |
Sorrell, Brian K Hawes, Ian Safi, Karl |
author_facet |
Sorrell, Brian K Hawes, Ian Safi, Karl |
author_sort |
Sorrell, Brian K |
title |
Comparison of (a) primary production and (b) secondary production (measured as BPthy) between layers of meromictically stratified ponds |
title_short |
Comparison of (a) primary production and (b) secondary production (measured as BPthy) between layers of meromictically stratified ponds |
title_full |
Comparison of (a) primary production and (b) secondary production (measured as BPthy) between layers of meromictically stratified ponds |
title_fullStr |
Comparison of (a) primary production and (b) secondary production (measured as BPthy) between layers of meromictically stratified ponds |
title_full_unstemmed |
Comparison of (a) primary production and (b) secondary production (measured as BPthy) between layers of meromictically stratified ponds |
title_sort |
comparison of (a) primary production and (b) secondary production (measured as bpthy) between layers of meromictically stratified ponds |
publisher |
IOP Publishing |
publishDate |
2013 |
url |
https://dx.doi.org/10.6084/m9.figshare.1011883.v1 https://iop.figshare.com/articles/figure/_Comparison_of_a_primary_production_and_b_secondary_production_measured_as_BPthy_between_layers_of_m/1011883/1 |
long_lat |
ENVELOPE(166.500,166.500,-78.000,-78.000) |
geographic |
McMurdo Ice Shelf |
geographic_facet |
McMurdo Ice Shelf |
genre |
Ice Shelf McMurdo Ice Shelf |
genre_facet |
Ice Shelf McMurdo Ice Shelf |
op_relation |
https://dx.doi.org/10.6084/m9.figshare.1011883 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.1011883.v1 https://doi.org/10.6084/m9.figshare.1011883 |
_version_ |
1766032387200778240 |