|
|
|
|
| LEADER |
01000naa a22002652 4500 |
| 001 |
NLM25895843X |
| 003 |
DE-627 |
| 005 |
20231224190138.0 |
| 007 |
cr uuu---uuuuu |
| 008 |
231224s2009 xx |||||o 00| ||eng c |
| 024 |
7 |
|
|a 10.1111/j.1529-8817.2009.00764.x
|2 doi
|
| 028 |
5 |
2 |
|a pubmed24n0863.xml
|
| 035 |
|
|
|a (DE-627)NLM25895843X
|
| 035 |
|
|
|a (NLM)27032585
|
| 040 |
|
|
|a DE-627
|b ger
|c DE-627
|e rakwb
|
| 041 |
|
|
|a eng
|
| 100 |
1 |
|
|a Ryan, Ken G
|e verfasserin
|4 aut
|
| 245 |
1 |
4 |
|a THE SHORT-TERM EFFECT OF IRRADIANCE ON THE PHOTOSYNTHETIC PROPERTIES OF ANTARCTIC FAST-ICE MICROALGAL COMMUNITIES(1)
|
| 264 |
|
1 |
|c 2009
|
| 336 |
|
|
|a Text
|b txt
|2 rdacontent
|
| 337 |
|
|
|a ƒaComputermedien
|b c
|2 rdamedia
|
| 338 |
|
|
|a ƒa Online-Ressource
|b cr
|2 rdacarrier
|
| 500 |
|
|
|a Date Completed 04.04.2016
|
| 500 |
|
|
|a Date Revised 01.04.2016
|
| 500 |
|
|
|a published: Print-Electronic
|
| 500 |
|
|
|a Citation Status PubMed-not-MEDLINE
|
| 520 |
|
|
|a © 2009 Phycological Society of America.
|
| 520 |
|
|
|a Although sea-ice represents a harsh physicochemical environment with steep gradients in temperature, light, and salinity, diverse microbial communities are present within the ice matrix. We describe here the photosynthetic responses of sea-ice microalgae to varying irradiances. Rapid light curves (RLCs) were generated using pulse amplitude fluorometry and used to derive photosynthetic yield (ΦPSII ), photosynthetic efficiency (α), and the irradiance (Ek ) at which relative electron transport rate (rETR) saturates. Surface brine algae from near the surface and bottom-ice algae were exposed to a range of irradiances from 7 to 262 μmol photons · m(-2) · s(-1) . In surface brine algae, ΦPSII and α remained constant at all irradiances, and rETRmax peaked at 151 μmol photons · m(-2) · s(-1) , indicating these algae are well acclimated to the irradiances to which they are normally exposed. In contrast, ΦPSII , α, and rETRmax in bottom-ice algae reduced when exposed to irradiances >26 μmol photons · m(-2) · s(-1) , indicating a high degree of shade acclimation. In addition, the previous light history had no significant effect on the photosynthetic capacity of bottom-ice algae whether cells were gradually exposed to target irradiances over a 12 h period or were exposed immediately (light shocked). These findings indicate that bottom-ice algae are photoinhibited in a dose-dependent manner, while surface brine algae tolerate higher irradiances. Our study shows that sea-ice algae are able to adjust to changes in irradiance rapidly, and this ability to acclimate may facilitate survival and subsequent long-term acclimation to the postmelt light regime of the Southern Ocean
|
| 650 |
|
4 |
|a Journal Article
|
| 650 |
|
4 |
|a Antarctic sea ice
|
| 650 |
|
4 |
|a Ek
|
| 650 |
|
4 |
|a PAM fluorometry
|
| 650 |
|
4 |
|a photoinhibition
|
| 650 |
|
4 |
|a rETRmax
|
| 650 |
|
4 |
|a rapid light curves
|
| 650 |
|
4 |
|a ΦPSII
|
| 700 |
1 |
|
|a Cowie, Rebecca O M
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Liggins, Elizabeth
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a McNaughtan, Daniel
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Martin, Andrew
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Davy, Simon K
|e verfasserin
|4 aut
|
| 773 |
0 |
8 |
|i Enthalten in
|t Journal of phycology
|d 1966
|g 45(2009), 6 vom: 01. Dez., Seite 1290-8
|w (DE-627)NLM098182994
|x 1529-8817
|7 nnns
|
| 773 |
1 |
8 |
|g volume:45
|g year:2009
|g number:6
|g day:01
|g month:12
|g pages:1290-8
|
| 856 |
4 |
0 |
|u http://dx.doi.org/10.1111/j.1529-8817.2009.00764.x
|3 Volltext
|
| 912 |
|
|
|a GBV_USEFLAG_A
|
| 912 |
|
|
|a SYSFLAG_A
|
| 912 |
|
|
|a GBV_NLM
|
| 912 |
|
|
|a GBV_ILN_21
|
| 912 |
|
|
|a GBV_ILN_40
|
| 912 |
|
|
|a GBV_ILN_72
|
| 912 |
|
|
|a GBV_ILN_176
|
| 912 |
|
|
|a GBV_ILN_350
|
| 951 |
|
|
|a AR
|
| 952 |
|
|
|d 45
|j 2009
|e 6
|b 01
|c 12
|h 1290-8
|