Winter temperature and shifts in phytoplankton assemblages in a small Chara-lake

Pełechata, Aleksandra; Pełechaty, Mariusz; Pukacz, Andrzej

doi:10.1016/j.aquabot.2015.03.001

Cited by 38 publications

(29 citation statements)

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“…Consequently, light limitations induced by phytoplankton growth caused deterioration of submerged vegetation after mild winters. In contrast, high nutrient concentration and low phytoplankton biomass after mild winter was reported by Pełechata et al (2015) in a small Chara-lake, in which the charophyte vegetation developed and strongly counteracted the excessive growth of phytoplankton. In the studied lakes in the Polesie region, which are phytoplankton-or macrophyte-dominated, non- overwintering species (C. demersum, M. spicatum) comprise benthic vegetation.…”

Section: Discussionmentioning

confidence: 91%

“…In Lake Czarne, macrophyte dominance could hamper the development of phytoplankton by different mechanisms, i.e. competition on nutrients end allelopathic effects (Scheffer et al, 1993;Nakai et al, 1999;Pełechata et al, 2015). According to other studies (Ali et al, 1995(Ali et al, , 2011Ejankowski and Solis, 2015), we speculate that the light climate in this lake was still favourable for the SAV and much above the species tolerance level, independently on the type of winter.…”

Section: Discussionmentioning

confidence: 93%

“…If the effect of the absence of ice cover on lakes is extended over time, the biomass of many macrophyte populations will be negatively affected during the summer season (Netten et al, 2011). However, this effect can be reversed in lakes with overwintering charophyte meadows, which are able to maintain high water clarity by limiting the development of phytoplankton (Pełechata et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…The concentrations of mineral forms of nutrients, such as, ammonia and nitrate nitrogen or phosphate phosphorus, in lakes are often higher after a mild winter (Weyhenmeyer et al, 2008;Laugaste et al, 2010;Pełechata et al, 2015), which may be related to permanent water mixing during ice-free winters (Lenard and Wojciechowska, 2013). Thus, a larger portion of soluble nutrients may be available for primary producers in the following season and can lead to phytoplankton blooms (Uchmański and Szeligiewicz, 1988).…”

Section: Introductionmentioning

confidence: 99%

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The effect of ice phenology exerted on submerged macrophytes through physicochemical parameters and the phytoplankton abundance

Ejankowski

Lenard

2015

J Limnol

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effect of ice phenology exerted on submerged macrophytes through physicochemical parameters and the phytoplankton abundance

Ejankowski

Lenard

2015

J Limnol

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“…Characeae usually form monospecific submerged meadows (Berger & Schagerl 2004). Waterbodies with a frequent occurrence of these organisms are generally clear waters with low phytoplankton productivity and great Secchi-depths (crawford 1977;Blindow et al 2002;Pełechata et al 2015;rodrigo et al 2015). Many members of the Characeae have a characteristic pungent smell resembling garlic due to sulphuric compounds (anthoni et al 1980), which are thought to be allelopathically active (anthoni et al 1980;hilt & groSS 2008).…”

Section: Introductionmentioning

confidence: 99%

Allelopathic potential of stoneworts

Mähnert¹,

Schagerl²,

Krenn³

2017

Fottea

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Abstract:We investigated growth inhibitory effects of the stoneworts (Characeae) Chara aspera, C. globularis, C. rudis and C. tomentosa on the target organisms Chlorella vulgaris, Acutodesmus acuminatus (Chlorophyta), Synechococcus elongatus, S. leopoliensis (Cyanobacteria) and Aliivibrio fischeri (Proteobateria). Besides fresh Chara shoots, we tested dichloromethane, n-butanol and methanol extracts from dried algae and condensed ice from the lyophilisation process. The study revealed a high potential of allelochemicals of stoneworts for antibiotic treatments, which could be applied in several application fields. We found minor growth inhibition of eukaryotes, but strong effects on Cyanobacteria and A. fischeri with both life algae and extracts. HPLCanalyses of the extracts revealed neither intra-, nor interspecific differences of the composition, only quantitative differences were observed. Cyanobacteria were strongly affected by polar ice extracts indicating the presence of volatile allelochemicals. Application of allelopathically active extracts caused a strong decline of maximum fluorescence yield, a measure of physiological fitness, within the first few minutes and a partial recovery after 60 to 90 minutes. A comparison of active and non-active ice extracts based on GC-MS screening revealed complex patterns for active ones, however an identification of individual compounds was beyond the scope of this study.

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Preliminary evidence of an endangered species benefiting from moderate climate warming: A palaeolimnological study of the charophyte Lychnothamnus barbatus

Brzozowski

Kowalewski

Szczuciński

et al. 2021

Aquatic Conservation

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In a time of rapid environmental changes, identification of the effects of climate warming on charophytes (Characeae, Charophyta) will enable the optimization of conservation measures, especially for extremely rare species. Lychnothamnus barbatus is one of the rarest charophytes worldwide, which has decreased in the number of occupied sites over the last century. However, the recolonization of former sites has been observed in recent years (e.g. Lake Kuźnickie, Poland). The study aimed to analyse the effects of climatic changes and human pressure on the L. barbatus population. Three 30 cm sediment cores were collected from minimum, average, and maximum depths of L. barbatus occurrence to determine the past vegetation composition. Sediment cores were dated using the radioisotopes lead‐210, caesium‐137, and carbon‐14. A spatial analysis of the lake catchment changes during the last 120 years was also conducted. The study demonstrated L. barbatus presence in Lake Kuźnickie at the beginning of the 16th century. However, a sharp increase in the proportion of this species in the vegetation community occurred in the 19th century and during climate warming at the end of the Little Ice Age. Factors that significantly influenced the present occurrence of the L. barbatus population included improvement in water quality and the oospore bank deposited in the bottom sediments. This study is the first palaeoreconstruction in a modern lake dominated by L. barbatus. Based on the history of L. barbatus in Lake Kuźnickie after the end of the Little Ice Age, the positive effect of climate warming on the contemporary recovery of this charophyte is postulated. The reaction of L. barbatus to climate warming appears to differ from commonly accepted scenarios for aquatic macrophytes because its recovery in the past and at present coincided with increases in air temperature. This research indicated the appropriate management and conservation practices for lakes with L. barbatus populations.

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Winter temperature and shifts in phytoplankton assemblages in a small Chara-lake

Cited by 38 publications

References 38 publications

The effect of ice phenology exerted on submerged macrophytes through physicochemical parameters and the phytoplankton abundance

The effect of ice phenology exerted on submerged macrophytes through physicochemical parameters and the phytoplankton abundance

Allelopathic potential of stoneworts

Preliminary evidence of an endangered species benefiting from moderate climate warming: A palaeolimnological study of the charophyte Lychnothamnus barbatus

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