Photosynthesis and respiration of some marine benthic algae from Spitsbergen

Latala, Adam

doi:10.3402/polar.v8i2.6822

Cited by 5 publications

(4 citation statements)

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“…In Arctic species, light saturation of photosynthesis is in a similar range compared to cold temperate species. However, less data are available, and these are not easy to compare because some light measurements were made in "lux" units (Prahl 1979, Latala 1990).…”

Section: Photosynthesismentioning

confidence: 99%

Ecophysiology of Polar Algae

Kirst

Wiencke

1995

Journal of Phycology

231

114

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Section: Photosynthesismentioning

confidence: 99%

Ecophysiology of Polar Algae

Kirst

Wiencke

1995

Journal of Phycology

231

114

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“…Physiological studies of algae in Kongsfjorden have consistently reported low light compensation points for O 2 production (LCP) of about 2-7 µmol m −2 s −1 . Photosynthesis in Arctic kelps also shows low light requirements (I k ) for saturation of about 20-40 µmol m −2 s −1 (Latala, 1990;Krüger, 2016). These features constitute adaptations to the frequent low light environment and are considered a general characteristic of polar phototrophs (Gómez et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

A Warmer Arctic Compromises Winter Survival of Habitat-Forming Seaweeds

2022

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Continuous winter darkness at a latitude of 79°N was simulated in cultures of four species of Arctic seaweeds at 3 and 8°C. The laminarians Saccharina latissima and Alaria esculenta, and the rhodophytes Phycodrys rubens and Ptilota gunneri were monitored for 4 months in total darkness and after 1 week following light return in early spring, under controlled laboratory conditions. Biomass loss during darkness was enhanced by the high temperature in all species. At 8°C, the two laminarians were unable to resume growth upon re-illumination. Alaria esculenta showed new blade production by the end of the dark period, but only at 3°C. In all species, the photosynthetic ability was sustained, not suspended, during the whole dark period. P. rubens exhibited lower photosynthetic potential at 8°C than at 3°C during the darkness period, but it was able to recover its O2 evolving potential upon re-illumination, as P. gunneri and S. latissima did, but the latter only at 3°C. The reactivation of photosynthesis seemed to involve photosystem II over photosystem I, as 7 d of photoperiod after the prolonged darkness was not enough to fully recover the PAM-related photosynthetic parameters. Only small changes were recorded in the internal chemical composition (total C, total N, carbohydrates, proteins, and lipids), but species-specific differences were observed. Unlike subarctic areas with an operating photoperiod along the year, a warmer polar night might pose a limit to the ability of multi-year seaweeds to occupy the new ice-free illuminated areas of the Arctic coasts, so that newcomers will potentially be restricted to the spring-summer season.

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“…The ecology of A. arcta , its morpho-physiological traits, stages of early development and life cycle are well-studied ( King, Shramm, 1976 ; Latala, 1990 , Karsten et al., 1991 , Sussmann and DeWreede, 2005 , Sussmann and DeWreede, 2001 , Roleda et al., 2010 , Sussman, Scrosati, 2011 ). There is much less research on the effect of hydrocarbons and other pollutants on different Acrosiphonia species.…”

Section: Introductionmentioning

confidence: 99%