New records of Chara connivens P. Salzmann ex A. Braun 1835 – an extremely rare and protected species in Polish brackish waters

Brzeska, Paulina; Woźniczka, Adam; Pełechaty, Mariusz; Blindow, Irmgard

doi:10.5586/asbp.2015.010

Cited by 15 publications

(10 citation statements)

References 5 publications

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“…If yes, what are the critical light conditions to initiate growth and a spatial spread? Our field surveys and a literature study proves that different submerse macrophyte species are still present in the western lagoon and single macrophyte stands were found in a water depth of up to 1.8 m. This is true for the eastern, Polish part as well (Brzeska et al 2015). Recent studies by Nowak et al (2008) and Blindow et al (2016) documented that germinable diaspores of several species are present in the sediments of all observed German Baltic coastal water.…”

Section: System Formulation and Assessment: The Environmental Mussel Farmsupporting

confidence: 72%

Ecological-social-economic assessment of zebra-mussel cultivation scenarios for the Oder (Szczecin) Lagoon

et al. 2018

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The Systems Approach Framework with an integrated Ecological-Social-Economic assessment was applied to address the issue of zebra mussel (Dreissena polymorpha) farming in the large Oder (Szczecin) Lagoon, southern Baltic Sea. Heavy eutrophication hampers the use of the lagoon and zebra mussel farming is considered as new use and potential measure to improve water quality. Three alternative scenarios were developed in interaction with local stakeholders: 1) the production of mussels as fresh feed and meal on a commercial basis seemed not profitable, because of a limited market for fresh mussels (zoos, aquaculture) and low prices for organic feed. 2) Mussel cultivation to improve transparency and attractiveness of bathing waters near beaches had only a limited potential (0.2 m improvement of Secchi depth). A higher mussel biomass would increase the risk of temporary hypoxia. 3) Mussels farms for improving the environmental status (according to EU Water Framework Directive) by supporting macrophyte restoration were considered as the most promising scenario. Our model simulations suggested that as soon as a compensation for nutrient removal is considered, all mussel farm scenarios could cover the costs. Experiments and literature confirm that the conditions for an environmental friendly farming approach in the lagoon are suitable. Steps towards and problems associated with an implementation, e.g. invasion of Dreissena bugensis (quagga mussel), are discussed. Each step of the Ecological-Social-Economic assessment and major lessons learnt are documented in detail. Altogether, the approach turned out to be very suitable for this issue.

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Section: System Formulation and Assessment: The Environmental Mussel Farmsupporting

confidence: 72%

Ecological-social-economic assessment of zebra-mussel cultivation scenarios for the Oder (Szczecin) Lagoon

et al. 2018

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“…These appearances are practically identical to those reported for the end of the 19th century (Brandt, 1894/96). Together with the re-occurrence of Characeae (Brzeska et al, 2015), this is pointing to an improving ecological state due to the increased water transparency in Large Lagoon. This improvement was accompanied by nearly a halving of Chla concentrations (Figure 4), what is strongly correlated to the reduced TP loads (Figure 5).…”

Section: Discussionmentioning

confidence: 94%

Managing Eutrophication in the Szczecin (Oder) Lagoon-Development, Present State and Future Perspectives

et al. 2019

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“…Among the recent benthic invaders, G. tigrinus have proven to be the most aggressive in the Baltic Sea [39]. Already two years after the first finding, the species accounted for about 50% of the total occurrence of gammarids in the south coast of Saaremaa Island [21]. G. tigrinus is more selective about environmental conditions in Estonian waters compared to its native range.…”

Section: Future Distribution Of Speciesmentioning

confidence: 99%

“…Although the species is believed to be introduced to Baltic Sea from western Europa by ballast water of ships [20], the proven origin of the species is remained unclear and species is categorised as cryptic [18]. Chara connivens has been recorded in single locations in the 1960s in the Estonian coastal sea, following the continuous enlargement of distribution area since 2005 [18], [21]. The alien species G. tigrinus occurs naturally in North America.…”

Section: Introductionmentioning

confidence: 99%

Predicting Potential Effects of Climate Change on Benthic Species: Current and Future Distribution of Native and Non-Native Charophytes and Amphipods

Torn

Herkül

Peterson

et al. 2020

WIT Transactions on Ecology and the Environment

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The ongoing climate change is expected to affect the distribution and vitality of marine aquatic species through various links and changes in environmental conditions. The aim of the study was to analyse and compare climate change related effects on native and non-native benthic species groups in the Baltic Sea. We analysed the impact of changes on the charophytes (native Chara aspera and non-native Chara connivens) and gammarid amphipods (native Gammarus salinus and non-native Gammarus tigrinus). Currently, C. aspera and G. salinus are the most widespread and frequent species among charophytes and gammarids in NE Baltic Sea. C. connivens has been recorded in single locations in the 1960s, following the continuous enlargement of the distribution area since 2005. G. tigrinus has showed significant occupation success in the region since their first finding in 2003. The random forest modelling method was used to produce current species distribution models and to predict the potential changes of distribution based on future climate scenarios. In the brackish Baltic Sea, species are often living close to their salinity tolerance limits and the decrease in salinity will probably cause profound changes in distribution of both marine and freshwater species. Moreover, the model predictions showed that, probably due to wider salinity and temperature tolerance, the non-native species will gain advantages over native species. Due to climate change, a significant increase of the distribution areas of non-native species is expected to occur on account of the native species. The distribution area of C. connivens is predicted to double and G. tigrinus to increase by 15%. Changes in environmental conditions also favour the distribution of native charophyte C. aspera due to the freshwater origin of the species. However, the marine species G. salinus is predicted to lose 65% of its distribution area.

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New records of Chara connivens P. Salzmann ex A. Braun 1835 – an extremely rare and protected species in Polish brackish waters

Cited by 15 publications

References 5 publications

Ecological-social-economic assessment of zebra-mussel cultivation scenarios for the Oder (Szczecin) Lagoon

Ecological-social-economic assessment of zebra-mussel cultivation scenarios for the Oder (Szczecin) Lagoon

Managing Eutrophication in the Szczecin (Oder) Lagoon-Development, Present State and Future Perspectives

Predicting Potential Effects of Climate Change on Benthic Species: Current and Future Distribution of Native and Non-Native Charophytes and Amphipods

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