Zooplankton and environmental factors of a recovering eutrophic lake (Lysimachia Lake, Western Greece)

Chalkia, Ekaterini; Kehayias, George

doi:10.2478/s11756-013-0171-9

Cited by 13 publications

(5 citation statements)

References 29 publications

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“…Generally, the abundance values recorded in the present study were greater compared to other great oligotrophic lakes of the southern Europe, such as Lake Ohrid [22], Lake Tavropos [23] and Lake Bracciano [24]. On the other hand, the zooplankton abundance is lower than other eutrophic lakes of Greece like Lake Volvi [25], Lake Mikri Prespa [26], Lake Pamvotis [27], as well as the nearby eutrophic Lake Lysimachia [28] and the mesotrophic Lake Amvrakia [29]. The temporal variation of the total zooplankton was characterized by a decrease of abundance after September with lowest values in winter, while a first increase in spring due to rotifers and a second one in summer due to copepods.…”

Section: Open Access Jepcontrasting

confidence: 49%

Trophic State Evaluation of a Large Mediterranean Lake Utilizing Abiotic and Biotic Elements

Kehayias¹,

Doulka²

2014

JEP

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The trophic state of a freshwater ecosystem reflects its environmental quality. This is why several trophic indicators have been developed for such water bodies based on chemical, physical and biological parameters. Apart from that, there are several biotic elements which can be used in accessing the environmental condition of a freshwater ecosystem. Zooplankton organisms are important elements of the structure and function of lakes and are considered useful indicators of alterations in their trophic dynamics and ecological state related to changes in nutrient loading and climate. In accordance to the above, the present study is an attempt to assess the trophic condition of the largest lake in Greece (Lake Trichonis) through the investigation of the physicochemical elements, along with the biotic indications provided by a three-year study of the lake's zooplankton. The present results, compared with previous studies conducted between 15 and 25 years before, showed that there was an increase in the maximum values of the concentrations of chlorophyll-α and nutrients, while there was a decrease in water transparency. The implementation of Carslon's trophic state index (TSI) revealed that Lake Trichonis still remains an oligo-to mesotrophic ecosystem as it was in the past. However, although the zooplankton investigation showed several features that are common in oligotrophic lakes, there are certain eutrophic characteristics of the zooplankton community (e.g. abundance variation pattern, indicator species, seasonal succession of cladocerans) pointing out a different state of the ecosystem in comparison to the past. In conclusion, the use of a biotic element like zooplankton revealed that Lake Trichonis is experiencing a transitional condition towards the eutrophic state and points out the necessity for constant inspection and monitoring of this ecosystem.

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Section: Open Access Jepcontrasting

confidence: 49%

Trophic State Evaluation of a Large Mediterranean Lake Utilizing Abiotic and Biotic Elements

Kehayias¹,

Doulka²

2014

JEP

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“…Generally, abundance and biomass of rotifers are positively associated with trophic level (Chalkia and Kehayias 2013). Trichocerca and Polyarthra are commonly considered as eutrophic genera (Liang et al 2020), and they belonged to the virgate trophi and Asplanchna corona groups in this study.…”

Section: Effects Of Environmental Factors On Abundance and Biomass Of Rotifer Functional Groupsmentioning

confidence: 75%

Seasonal variations of rotifer communities in three climatic zones: effects of environmental parameters on changes of functional groups

Qian

Wen

2021

Limnology

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In this study, the annual changes of rotifer communities were observed in six lakes belonging to tropical, subtropical, and warm temperate zones. Rotifers were classified into different functional groups based on the morphology of the corona and trophi. The abundance and biomass of each functional group were compared between climatic zones, and the driving environmental factors were analyzed. Analysis of similarities (ANOSIM), and similarity percentage analysis (SIMPER) indicated distinct separation in rotifer community structure between the three climatic zones. The subtropical zone showed more functional groups, higher abundance and biomass of dominant functional groups than tropical and warm temperate zones. Asplanchna abundance and water transparency were considered as the major factors affecting rotifer functional groups in all the three climatic zones. Chlorophyll a content (Chl-a) was more important in subtropical and warm temperate zones than in tropical zone. Water temperature mainly affected rotifer functional groups in warm temperate and tropical zones, but showed less effects in subtropical zone. In addition, NO 2 − -N content was an important factor in warm temperate zone, but not in subtropical and tropical zones. Overall, classification of functional groups could be a useful method to investigate the changes of rotifer community structure in different climatic zones.

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“…On the other hand, records from its native range in the Mediterranean, mostly include stagnant water bodies of different ecological characteristics. In Greece, V. spiralis is dominant or common macrophyte in shallow littoral zone of deep oligotrophic lakes, as well as in shallow mesoeutrophic and eutrophic lakes on calcareous bedrock, situated both at low-and mid-altitudes (Koumpli-Sovantzi 1989, Danielidis 1996, Hollis & Stevenson 1997, Chalkia & Kehayias 2013a,b, Matzafleri et al 2013, Stefanidis et al 2018. Furthermore, it is present in both Macedonian and Greek part of Lake Megali Prespa, a large, deep, basic and mesotrophic lake, situated at 850 m a.s.l (Talevska et al 2009, Stefanidis et al 2018.…”

Section: Discussionmentioning

confidence: 99%

Distribution and habitat characteristics of Vallisneria spiralis L. in Croatia

et al. 2021

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Eight new localities of the rare, strictly protected macrophyte Vallisneria spiralis have been recorded during a comprehensive survey of water bodies in Croatia. One record is located in the Mediterranean Region, in Butoniga Reservoir, while the remaining records are from the Continental Region, the majority of them situated along the Kupa River. Vallisneria spiralis occurred in slightly basic and alkaline environments and in a wide range of nutrient availability. In Continental localities, the species was present within Myriophyllo-Nupharetum luteae of the alliance Nymphaeion-albae, while in Butoniga, it occurred within the vegetation of the alliance Potamogetonion. Prior to our research, the species was recorded in Croatia only twice, with the older record dating back to the 19th century and the second from recent years, but neither one was confirmed in later surveys. The low number of records of V. spiralis, in spite of a wide-ranging search through hundreds of localities, confirmed the rare status of this species, although the reasons for such limited distribution remain unclear, especially bearing in mind that suitable aquatic habitats are quite widespread in the country.

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Zooplankton and environmental factors of a recovering eutrophic lake (Lysimachia Lake, Western Greece)

Cited by 13 publications

References 29 publications

Trophic State Evaluation of a Large Mediterranean Lake Utilizing Abiotic and Biotic Elements

Trophic State Evaluation of a Large Mediterranean Lake Utilizing Abiotic and Biotic Elements

Seasonal variations of rotifer communities in three climatic zones: effects of environmental parameters on changes of functional groups

Distribution and habitat characteristics of Vallisneria spiralis L. in Croatia

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