Temperature adaptation in strains of the amphi-equatorial green alga Urospora penicilliformis (Acrosiphoniales): biogeographical implications

Bischoff, B.; Wiencke, Christian

doi:10.1007/bf00350690

“…The temperature responses of thermal traits (i.e., upper and lower survival temperatures, growth range, temperature requirements for reproduction, and photosynthesis) are typically determined and compared with the annual temperature regime of the respective habitats. Especially, the annual growth yield (potential monthly growth rate) is a useful parameter to evaluate local temperature adaptation as it allows to combine the seasonal temperature range with the temperature dependence of growth (e.g., applied in Breeman and Pakker 1994;Bischoff and Wiencke 1995;Eggert et al 2003a). It is concluded from these "common-environment studies" that observed differences between isolates have a genetic basis and the results provide evidence for intra-specific differentiation.…”

Section: Temperature Control Of Biogeographical Distribution Boundariesmentioning

confidence: 97%

“…It is concluded from these "common-environment studies" that observed differences between isolates have a genetic basis and the results provide evidence for intra-specific differentiation. Thermal ecotypes or ecoclinal variation has been described for seaweed species with a disjunct distribution or with wide distributional ranges (Bolton 1983;Bischoff and Wiencke 1995;Eggert et al 2003a). In contrast, did not find ecotypic differentiation in tropical to subtropical seaweed species with disjunct eastern and western Atlantic populations, despite the large geographic distance.…”

Section: Temperature Control Of Biogeographical Distribution Boundariesmentioning

confidence: 99%

Seaweed Responses to Temperature

Eggert

¹

2012

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"Why don't seaweeds spread beyond their present boundaries along an uninterrupted rocky coastline?", asked Breeman in 1988. Two principal aspects play a central role in shaping biogeographical distribution patterns: temperature-dependent effects on performance (e.g., growth, photosynthesis) and temperature tolerance (i.e., survival). The temperature responses of species are often correlated with the local thermal environments, i.e., species are locally adapted, but may vary seasonally or among populations or life stages due to phenotypic plasticity. Accordingly, it is necessary to differentiate three types of temperature responses: (1) genetic adaptation to local conditions, (2) phenotypic acclimation in response to variation of environmental conditions, and (3) short-term physiological regulation. The responses take place over different timescales: seconds to minutes (regulation), hours to days (acclimation), and up to thousands of millions of years (adaptation). This chapter reviews the temperature responses of seaweeds and their biogeographical implications. Local Temperature Adaptation of Growth and PhotosynthesisThe effect of temperature on performance traits, such as growth and photosynthesis, is typically visualized using temperature-response curves. Both growth and photosynthetic rates of seaweeds increase with temperature, plateau at a maximal level, A. Eggert (*)

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“…Species with an amphiequatorial distribution e.g. Acrosiphonia arcta (Bischoff and Wiencke 1995a), Urospora penicilliformis (Bischoff and Wiencke 1995b) and Desmarestia viridis/ confervoides (Peters and Breeman 1992) have probably crossed the equator during the Pleistocene lowering of the water temperatures in the tropics . The USTs of these taxa are with 25-27°C slightly above the minimum tropical sea surface temperatures of 23-25°C during the last glaciation (CLIMAP Project members 1981).…”

Section: Temperature Demands and Geographical Distributionmentioning

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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“…Species with an amphiequatorial distribution e.g. Acrosiphonia arcta (Bischoff and Wiencke 1995a), Urospora penicilliformis (Bischoff and Wiencke 1995b) and Desmarestia viridis/ confervoides (Peters and Breeman 1992) have probably crossed the equator during the Pleistocene lowering of the water temperatures in the tropics . The USTs of these taxa are with 25-27°C slightly above the minimum tropical sea surface temperatures of 23-25°C during the last glaciation (CLIMAP Project members 1981).…”

Section: Temperature Demands and Geographical Distributionmentioning

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

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Temperature adaptation in strains of the amphi-equatorial green alga Urospora penicilliformis (Acrosiphoniales): biogeographical implications

Cited by 15 publications

References 21 publications

Seaweed Responses to Temperature

Seaweed Responses to Temperature

Life strategy, ecophysiology and ecology of seaweeds in polar waters

Life strategy, ecophysiology and ecology of seaweeds in polar waters

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