Production rate estimation of mycosporine‐like amino acids in two <scp>A</scp>rctic melt ponds by stable isotope probing with <scp><scp>NAH</scp></scp> 13 <scp><scp>CO</scp></scp> 3

The net carbon uptake rate and net production rate of mycosporine‐like amino acids ( MAA s) were measured in phytoplankton from 2 different melt ponds ( MP s; closed and open type pond) in the western A rctic O cean using a 13 C stable isotope tracer technique. The Research Vessel Araon visited ice‐...

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Bibliographic Details
Published in:Journal of Phycology
Main Authors: Ha, Sun‐Yong, Min, Jun‐Oh, Joo, Hyun Min, Chung, Kyung Ho, Shin, Kyung‐Hoon, Yang, EunJin, Kang, Sung‐Ho
Other Authors: Post, A., Ministry of Oceans and Fisheries, Korea
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2014
Subjects:
Plant Science
Aquatic Science
Sea ice
Online Access:http://dx.doi.org/10.1111/jpy.12221
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjpy.12221
https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpy.12221
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Summary:The net carbon uptake rate and net production rate of mycosporine‐like amino acids ( MAA s) were measured in phytoplankton from 2 different melt ponds ( MP s; closed and open type pond) in the western A rctic O cean using a 13 C stable isotope tracer technique. The Research Vessel Araon visited ice‐covered western‐central basins situated at 82°N and 173°E in the summer of 2012, when A rctic sea ice declined to a record minimum. The average net carbon uptake rate of the phytoplankton in polycarbonate ( PC ) bottles in the closed MP was 3.24 mg C · m −3 · h −1 ( SD = ±1.12 mg C · m −3 · h −1 ), while that in the open MP was 1.3 mg C · m −3 · h −1 ( SD = ±0.05 mg C · m −3 · h −1 ). The net production rate of total MAA s in incubated PC bottles was highest (1.44 ( SD = ±0.24) ng C · L −1 · h −1 ) in the open MP and lowest (0.05 ( SD = ±0.003) ng C · L −1 · h −1 ) in the closed MP . The net production rate of shinorine and palythine in incubated PC bottles at the open MP presented significantly high values 0.76 ( SD = ±0.12) ng C · L −1 · h −1 and 0.53 ( SD = ±0.06) ng C · L −1 · h −1 . Our results showed that high net production rate of MAA s in the open MP was enhanced by a combination of osmotic and UVR stress and that in situ net production rates of individual MAA can be determined using 13 C tracer in MP s in A rctic sea ice.

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