Overwintering and gyrogonite formation by the rare and endangered indicative macroalga Lychnothamnus barbatus (Meyen) Leonh. in eutrophic conditions

Pełechaty, Mariusz; Brzozowski, Michał; Pietruczuk, Karol

doi:10.1016/j.aquabot.2017.02.005

Cited by 17 publications

(24 citation statements)

References 11 publications

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“…Consequently, charophytes can be found in oligotrophic lakes down to as much as 65 m (Kufel and Kufel 2002), and in shallow turbid water where the Secchi depth is less than 5 cm (Casanova and Porter 2013). Light use efficiency allows also persistence during the winter with thick ice cover (Pukacz et al 2016a;Pełechaty et al 2017). Some charophyte species experience shading as a result of mineral encrustation directly on the surface of thalli (Raven et al 1986;Martin et al 2003) as well as within dense conspecific communities.…”

Section: Growing To Fertilityabiotic Requirements For a Happy Charophmentioning

confidence: 99%

Ecology of charophytes – permanent pioneers and ecosystem engineers

Schubert¹,

Blindow²,

Bueno³

et al. 2018

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For almost a century, charophytes have been regarded as a group that is confined to low-nutrient-clear water conditions. In light of recent research, this generalisation of the ecological niche dimensions of charophytes has changed and now includes more facets of ecological existence. In this review, the current knowledge with respect to species-specificity as well as temporal aspectsontogenetic and successional ones of the ecological requirements of charophytes are presented and discussed. This review identifies new directions for ecological research on charophytes as well as knowledge gaps to be filled, not just for reasons of academic curiosity, but also for applied purposes such as lake restoration, bioremediation and bioindication of water quality and water regime.

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Section: Growing To Fertilityabiotic Requirements For a Happy Charophmentioning

confidence: 99%

Ecology of charophytes – permanent pioneers and ecosystem engineers

Schubert¹,

Blindow²,

Bueno³

et al. 2018

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“…In recent years, the sites of the endangered charophyte Lychnothamnus barbatus (Meyen) Leonh. have been recolonized (Pełechaty et al, 2017;Raabe et al, 2012;Sinkevičienė & Urbaitė-Maževič, 2012). is charophyte is threatened with extinction, and red-listed in Poland (Siemińska et al, 2006), Lithuania (Balevičius, 2001), Germany (Schnittler & Ludwig, 1996), the Balkans (Blaženčić et al, 2006), and Australia (Bostock & Holland, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Today, there are only 56 sites of L. barbatus worldwide. Unfortunately, from the nineteenth century, approximately 62 sites of this rare charophyte disappeared (Pełechaty et al, 2017). In the twentieth century, the disappearance of L. barbatus was reported as a result of anthropogenic eutrophication of waters (Sugier et al, 2010 and references therein).…”

Section: Introductionmentioning

confidence: 99%

Transformation and Simplification of Aquatic Vegetation Structure and Reoligotrophication of a Lake During the Last 40 Years

et al. 2021

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The recovery or reconstruction of aquatic vegetation has recently been reported as a result of water quality improvement after anthropogenic eutrophication. The objectives of this study were: to investigate long-term trends in aquatic vegetation abundance in relation to decreasing water fertility and to present new directions in changes of the submerged aquatic vegetation structure, species richness, and biodiversity in Lake Kuźnickie (western Poland) with the perspective of the last 40 years (1978–2018). Lake Kuźnickie is an example of water quality improvement taking place without any additional reclamation measures, except a reduction in nutrient discharge into the lake from its direct catchment. Currently, the study lake represents a mesotrophic status. The Trophy State Index evidenced a decrease in the lake’s fertility compared to previous decades. The water quality improvement manifests in a significant reduction in the total phosphorus concentration. An analysis of the spatial changes in the phytolittoral evidenced a decrease in rush vegetation between 1978 and 2018 by over 2 ha. In the period 1978–2018, the aquatic vegetation structure in Lake Kuźnickie underwent significant reconstruction. Currently, charophytes play a much greater role in the lake compared to the last 40 years, contributing to the maintenance of the lake’s high water quality. Moreover, the endangered charophyte Lychnothamnus barbatus has recovered. Concurrently, however, the biodiversity and species richness of the submerged vegetation has decreased. At present, only four species dominate in the lake, including two charophytes L. barbatus , Nitellopsis obtusa , and two vascular plants Ceratophyllum demersum and Myriophyllum spicatum . Over 40 years, Lake Kuźnickie has changed from a eutrophic lake dominated by vascular plants to a mesotrophic lake with a codominant contribution by charophytes. The lake is characterized by good water quality, optimal for the development of aquatic vegetation, especially charophytes.

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“…This is likely due to the morphological traits that allow charophytes and other submerged macrophytes to overcome low light conditions since stem elongation towards the water surface will help charophytes to retrieve light (Asaeda et al, 2007). Light limitation usually causes elongation of thalli in charophytes growing in deep waters, such as Lychnothamnus barbatus (Pelechaty et al, 2017), Nitellopsis obtusa (Larkin et al, 2018), and Chara fibrosa (Asaeda et al, 2007). However, we observed a decline in total shoot length of C. vulgaris in the treatments where brownification was elevated above +200% compared to the controls.…”

Section: Discussionmentioning

confidence: 99%