Ecology of Alaskan Freshwater Algae II. Introduction: General Considerations

Prescott, G. W.

doi:10.2307/3223824

Cited by 23 publications

(20 citation statements)

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“…The lack of a diurnal dark period inhibits sporulation or gametogenesis in those algal taxa requiring day-length induction. Members of the green algal orders Oedogoniales and Zygnematales have rarely been observed to form zygospores in tundra regions (Prescott, 1963;Sheath et al, 1975). Lack of resistant-spore formation is critical in that cells must survive freezing for up to 10 months in the vegetative state.…”

Section: Effects Of Various Environmental Factors On Phytoplankton Sementioning

confidence: 99%

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Seasonality of phytoplankton in northern tundra ponds

Sheath

1986

Hydrobiologia

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Thermokarst ponds are the most abundant type of water body in the arctic tundra, with millions occurring in the coastal plains of Alaska, Northwest Territories and Siberia. Because ie covers of at least 2 m in thickness are formed at these latitudes, tundra ponds freeze solid every winter As a result, the growing season is shortened to a range of 60 to 100 days, during which time the photoperio-l is altered to a prolonged light phase. Tundra ponds are generally close to neutral in pH and low in ions, contain dissolved gases near saturation and are nutrient poor. In low arctic ponds there are two phytoplankton biomass and primary production peaks, whereas they may be only one in the high arctic. Nanoplanktonic flagellates of the Chrysophyceae and Cryptophyceae dominate the maxima. The mid-summer decline in phytoplankton in the low arctic can be attributed to a combination of phosphorus limitation and heavy grazing pressure. The cryptomonad Rhodomonas minuta Skuja is one of the most widespread phytoplankters in tundra ponds. Because of the altered photoperiods, many species do not form resting spores prior to ice formation but survive freezing in the vegetative state.

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Section: Effects Of Various Environmental Factors On Phytoplankton Sementioning

confidence: 99%

“…Hence phytoplankton are able to utilize the high insolation of summer solstice (Prescott, 1963). Because of their shallow depths, tundra ponds also heat up more than arctic lakes.…”

Section: Effects Of Various Environmental Factors On Phytoplankton Sementioning

confidence: 99%

Seasonality of phytoplankton in northern tundra ponds

Sheath

1986

Hydrobiologia

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“…Few tundra algal species undergo sexual reproduction to form resistant spores for over-wintering (Prescott, 1963;Sheath and Steinman, 1982). Consequently, the occurrence of vegetative-only population of Zygnema in Spitsbergen and the apparent loss of sexual phase (cf.…”

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confidence: 99%

The vegetative arctic freshwater green alga Zygnema is insensitive to experimental UV exposure

Holzinger

Roleda

Lütz

2009

Micron

121

139

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“…Mischococcus is fairly widely reported; it is tychoplanktonic and epiphytic on filamentous algae in ditches, ponds, and lakes in the Arctic (Ross, 1954;Prescott and Vinyard, 1965;Sheath and Hellebust, 1978;Sheath and Steinman, 1981), British Columbia (Stein, 1975;Stein and Borden, 1978), Quebec (Poulin et al, 1995), Wisconsin (Prescott, 1962), California (R.G. Sheath, pers.…”

Section: Descriptions Of Generamentioning

confidence: 95%

“…In the continental United States, the authors have collected Vaucheria in Massachusetts, Michigan, Ohio, Pennsylvania, Tennessee, North Carolina, Georgia, Alabama, Louisiana, Florida, Iowa, and California. It has also been collected in Maine, Rhode Island, Alaska, New Jersey, and Michigan (Prescott, 1963;Colt, 1985), Connecticut (Collins, 1905;Colt, 1974;Schneider et al, 1999;Schneider and Lane 2000), New York (Blum, 1951), West Virginia (Fling, 1939, Virginia (Woodson and Holoman, 1964;Woodson and Wilson, 1973), Kentucky (McInteer, 1930Harris, 1964), South Carolina (Dillard, 1967;Goldstein and Manzi, 1976), Oklahoma (Vinyard, 1958), Kansas (Thompson, 1938), Montana (Prescott and Dillard, 1979), Minnesota (Drouet, 1954), Illinois (Transeau, 1913), Missouri (Hayden, 1910) and Arkansas (Drouet, 1933;Meyer et al, 1970), Nevada, andUtah (Benson andRushforth, 1975;LaRivers, 1978) and as far south as Puerto Rico (Tiffany and Britton, 1944) and Trinidad (West, 1904). Vaucheria has also been collected in the Arctic (Prescott, 1953;Poulunin, 1954;Sheath and Hellebust, 1978) and Canada (Klugh, 1911;Stein, 1975;Stein and Gerrath, 1969;Stein and Borden, 1978;Duthie and Socha, 1976;Sheath and Steinman, 1981;Sheath et al, 1986).…”

Section: Vaucheria De Candolle 1801 (Figs 11c-m)mentioning

confidence: 99%