Effect of winter conditions on spring nutrient concentrations and plankton in a large shallow Lake Peipsi (Estonia/Russia)

Blank, Kätlin; Haberman, Juta; Haldna, Marina; Laugaste, Reet

doi:10.1007/s10452-009-9283-2

Cited by 28 publications

(19 citation statements)

References 30 publications

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“…However, also in May an effect of the time of ice break-up and severity of winter on water temperature could be observed. An earlier analysis of a 12-year data set (1997Blank et al, 2009) also showed that water temperatures in May are positively correlated with those in April (r = 0.68, p < 0.001). As a rule, water and air temperatures in June behaved independently of winter conditions.…”

Section: Ice Duration and Water Temperatures In The Months Following mentioning

confidence: 76%

“…As water temperature is considered to be one of the most important factors influencing zooplankton abundances in spring in temperate lakes (Swadling et al, 2000;Chen & Folt, 2002;Shatwell et al, 2008;Blank et al, 2009), climatic factors such as an increase in winter/spring air temperature affect the timing of zooplankton spring development (Weyhenmeyer et al, 1999;Mehner, 2000;Gerten & Adrian, 2002;Romare et al, 2005;Wagner & Benndorf, 2007;Richardson, 2008).…”

Section: Zooplanktonmentioning

confidence: 99%

“…Magnuson et al (2000) reported a 6.3 days earlier ice break-up in lakes over the northern hemisphere in the past 100 years in response to the 1.2 °C air temperature increase. The ice cover on lakes is not only a robust indicator of climate change and variation but it represents also a limnological response to climate change, which influences the ecology of the aquatic system: several studies showed that the ice cover has an impact on underwater light conditions (Leppäranta et al, 2003) and nutrient recycling (Livingstone, 1993), as well as on the production and biodiversity of phytoplankton (Phillips & Fawley, 2002;Weyhenmeyer et al, 2008), and on the dynamics of zooplankton (Talling, 2003;Richardson, 2008;Blank et al, 2009). Other studies (Nõges, 2004;Wagner & Benndorf, 2007;Blank et al, 2009) demonstrated that biological systems can exhibit responses to subtle climatic signals and could be sensitive indicators of climatic indices.…”

Section: Introductionmentioning

confidence: 99%

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Cool winters versus mild winters: effects on spring plankton in Lake Peipsi

Laugaste¹,

Haberman²,

Blank³

2010

Estonian J. Ecol.

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The influence of two winter periods with a different duration of the ice cover on Lake Peipsi (Estonia) on plankton and nutrient content was analysed. The winters of 2005 and 2006 were cold with ice duration of 140 days, whereas the winters of 2007 and 2008 were mild with about 50 and 15 days of ice duration, respectively. Total phosphorus (TP) concentration was lower, while silicon content and the nitrogen-phosphorus ratio (TN : TP) were markedly higher in the springs after the short winters of 2007 and 2008. The high Si concentration and TN : TP ratio persisted throughout the growing season of those years. Unicellular centric diatoms showed a sharp increase in April 2008, while the large filiform diatom Aulacoseira islandica dominated in the cool winters and after ice break-up. The high spring peak of diatoms was followed by their low biomass in summer. In May 2008, total zooplankton biomass, cladoceran biomass, and rotifer biomass were two times and that of copepods three times as high as in the Mays after the long-lasting ice cover. In the Junes after the mild winters the biomasses of total zooplankton and both crustacean groups (Cladocera, Copepoda) were about two times as high as the corresponding indicators for the Junes after the cool winters. The biomass of rotifers, on the contrary, was two times lower in the Junes after the warm winters because the numerous cold stenotherms Polyarthra dolichoptera and Synchaeta verrucosa had totally disappeared from zooplankton. The influence of ice duration on phytoplankton is most likely indirect, acting through nutrients, and on zooplankton direct, acting through water temperatures. The springs after warm winters related positively to zooplankters' mean weight, zooplankton-phytoplankton biomass ratio, and the timing of the clear water period.

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Section: Ice Duration and Water Temperatures In The Months Following mentioning

confidence: 76%

Section: Zooplanktonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cool winters versus mild winters: effects on spring plankton in Lake Peipsi

Laugaste¹,

Haberman²,

Blank³

2010

Estonian J. Ecol.

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“…Similarly, the severity of winter influenced spring nutrient concentrations in Lake Peipsi (Blank et al . ). Altogether such seasonal connections strongly favour previous calls to ‘close the loop’ (Salonen et al .…”

Section: Discussionmentioning

confidence: 97%

Ecology under lake ice

et al. 2016

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Winter conditions are rapidly changing in temperate ecosystems, particularly for those that experience periods of snow and ice cover. Relatively little is known of winter ecology in these systems, due to a historical research focus on summer 'growing seasons'. We executed the first global quantitative synthesis on under-ice lake ecology, including 36 abiotic and biotic variables from 42 research groups and 101 lakes, examining seasonal differences and connections as well as how seasonal differences vary with geophysical factors. Plankton were more abundant under ice than expected; mean winter values were 43.2% of summer values for chlorophyll a, 15.8% of summer phytoplankton biovolume and 25.3% of summer zooplankton density. Dissolved nitrogen concentrations were typically higher during winter, and these differences were exaggerated in smaller lakes. Lake size also influenced winter-summer patterns for dissolved organic carbon (DOC), with higher winter DOC in smaller lakes. At coarse levels of taxonomic aggregation, phytoplankton and zooplankton community composition showed few systematic differences between seasons, although literature suggests that seasonal differences are frequently lake-specific, species-specific, or occur at the level of functional group. Within the subset of lakes that had longer time series, winter influenced the subsequent summer for some nutrient variables and zooplankton biomass.

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“…Similar mechanisms could be responsible for the negative effects of higher spring water temperatures on TP in Lake Peipsi, where the biomass of cladocerans has been found to correlate positively with the sum of daily water temperatures in spring (April, May, June over the 1997-2007 period; Blank et al, 2009). It is likely that PAR in the period after 180 th day was associated with decreasing TP values via the compounding influences from other factors.…”

Section: Discussionmentioning

confidence: 98%