Growth and Production of the Seaweed, Himantothallus grandifolius, at King George Island

Dieckmann, Gerhard; Reichardt, Wolfgang; Zieliński, Kamil

doi:10.1007/978-3-642-82275-9_15

“…Up to three generations of blades may be found in one individual. As in species of Laminaria, blades of Himantothallus grandifolius grow in their lower part (Dieckmann et al 1985;Drew and Hastings 1992). Punch-hole experiments with A. mirabilis indicate that the blade elongates longitudinally as in Laminaria solidungula through a seasonally active intercalary meristem (Gó mez et al 1995a).…”

Section: Reproductive and Physiological Thallus Anatomymentioning

confidence: 99%

Life strategy, ecophysiology and ecology of seaweeds in polar waters

Wiencke

¹

,

Clayton

²

,

Gómez

³

et al. 2006

Rev Environ Sci Biotechnol

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Polar seaweeds are strongly adapted to the low temperatures of their environment, Antarctic species more strongly than Arctic species due to the longer cold water history of the Antarctic region. By reason of the strong isolation of the Southern Ocean the Antarctic marine flora is characterized by a high degree of endemism, whereas in the Arctic only few endemic species have been found so far. All polar species are strongly shade adapted and their phenology is finely tuned to the strong seasonal changes of the light conditions. The paper summarises the present knowledge of seaweeds from both polar regions with regard to the following topics: the history of seaweed research in polar regions; the environment of seaweeds in polar waters; biodiversity, biogeographical relationships and vertical distribution of Arctic and Antarctic seaweeds; life histories and physiological thallus anatomy; temperature demands and geographical distribution; light demands and depth zonation; the effect of salinity, temperature and desiccation on supraand eulittoral seaweeds; seasonality of reproduction and the physiological characteristics of C. Wiencke (&) AE U. H. Lü der

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“…Up to three generations of blades may be found in one individual. As in species of Laminaria, blades of Himantothallus grandifolius grow in their lower part (Dieckmann et al 1985;Drew and Hastings 1992). Punch-hole experiments with A. mirabilis indicate that the blade elongates longitudinally as in Laminaria solidungula through a seasonally active intercalary meristem (Gó mez et al 1995a).…”

Section: Reproductive and Physiological Thallus Anatomymentioning

confidence: 99%

Life strategy, ecophysiology and ecology of seaweeds in polar waters

Wiencke¹,

Clayton²,

Gómez³

et al. 2006

Life in Extreme Environments

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Polar seaweeds are strongly adapted to the low temperatures of their environment, Antarctic species more strongly than Arctic species due to the longer cold water history of the Antarctic region. By reason of the strong isolation of the Southern Ocean the Antarctic marine flora is characterized by a high degree of endemism, whereas in the Arctic only few endemic species have been found so far. All polar species are strongly shade adapted and their phenology is finely tuned to the strong seasonal changes of the light conditions. The paper summarises the present knowledge of seaweeds from both polar regions with regard to the following topics: the history of seaweed research in polar regions; the environment of seaweeds in polar waters; biodiversity, biogeographical relationships and vertical distribution of Arctic and Antarctic seaweeds; life histories and physiological thallus anatomy; temperature demands and geographical distribution; light demands and depth zonation; the effect of salinity, temperature and desiccation on supraand eulittoral seaweeds; seasonality of reproduction and the physiological characteristics of C. Wiencke (&) AE U. H. Lü der

show abstract

“…Drift seaweeds can be abundant in pockets on the coastal sea floor (Neushul 1965;Brouwer 1996b;Amsler, personal observations). A major portion of the primary production of Himantothallus grandifolius is lost as blade erosion and, in contrast to phytoplankton, this carbon input to the detrital communities continues throughout the year (Dieckmann et al 1985). Although living, drift Desmarestia anceps decays fairly slowly via fragmentation, carbon from dead D. anceps is recycled relatively quickly (Brouwer 1996b).…”

Section: Trophic Interactionsmentioning

confidence: 99%