Use of rotifer trophic state indices to show the effect of hydrobionts and nutrients on water trophic status in mesocosms

2020 ◽  
Vol 49 (2) ◽  
pp. 123-131
Author(s):  
Jolanta Ejsmont-Karabin ◽  
Irina Feniova ◽  
Iwona Kostrzewska-Szlakowska ◽  
Marek Rzepecki ◽  
Varos G. Petrosyan ◽  
...  
Keyword(s):  
Dreissena Polymorpha ◽  
Trophic State ◽  
Trophic Status ◽  
Eutrophic Lake ◽  
Zebra Mussels ◽  
Pelagic Zone ◽  
Species Structure ◽  
Rotifer Communities

AbstractWe have determined how Crustacea, zebra mussels (Dreissena polymorpha), fish and nutrients affect the trophic state in mesocosms filled with water collected from the pelagic zone of a eutrophic lake. We hypothesized that the pool of nutrients would increase both directly due to the input of phosphorus and nitrogen and/or indirectly due to the introduction of animal biomass. We used trophic state indices based on the abundance and species structure of rotifers to assess changes in the trophic state in mesocosms. The role of small detritophages in rotifer communities increased as a result of treatments. Our results clearly demonstrated that D. polymorpha was able to reduce the trophic status of mesocosm waters as indicated by reduced rotifer trophic state indices regardless of interactions with other treatment factors. Contrary to our expectations, neither the nutrients added at the beginning of the experiment nor the introduction of crustaceans or fish affected the rotifer trophic indices.

Differences in rotifer communities in two freshwater bodies of different trophic degree (Lake Ohrid and Lake Dojran, Macedonia)

Biologia ◽  
2012 ◽  
Vol 67 (3) ◽  
Author(s):  
Orhideja Tasevska ◽  
Christian Jersabek ◽  
Goce Kostoski ◽  
Dafina Gušeska
Keyword(s):  
Trophic State ◽  
Eutrophic Lake ◽  
Abundant Species ◽  
Lake Ohrid ◽  
Structure Population ◽  
Keratella Cochlearis ◽  
Species Numbers ◽  
Freshwater Bodies ◽  
Occurrence Pattern ◽  
Rotifer Communities

AbstractWe investigated monogonont rotifers in two natural Macedonian lakes that greatly differ in age, size and trophic state: Lake Ohrid and Lake Dojran. A main characteristic of Lake Ohrid is the scarcity of nutrients and consequently a low level of primary production. Lake Dojran represents a typical eutrophic lake. Results clearly indicate that species numbers are negatively correlated with trophic degree. Qualitative analyses of rotifer compositions in Lakes Ohrid and Dojran showed the presence of 70 and 55 taxa, respectively. Rotifer assemblages differed in their community structure, population densities, and the occurrence pattern of dominant species. The density of rotifers increased with increasing nutrient concentration, varying from min. 0.67 ind. L−1 in June, 2006 to max. 8.2 ind. L−1 in July, 2004 in Lake Ohrid, whereas min. 28.8 ind. L−1 (in December, 2005) and max. 442.5 ind. L−1 (in September, 2005) were recorded in Lake Dojran. Gastropus stylifer and Keratella cochlearis were the most abundant species in the pelagic zone of Lake Ohrid, averaging monthly densities of 1.2 ind. L−1 and 0.6 ind. L−1, respectively, thereby contributing 29% and 15% to rotifer abundance. In contrast, Lake Dojran rotifers were dominated by Brachionus spp. Brachionus diversicornis and Brachionus calyciflorus f. amphiceros were most abundant, comprising 40% and 25% of the total rotifer density. These results corroborate our idea, that the trophic state is an important factor in determining the composition of rotifer communities.

Environmental Condition and Trophic Status of Lake Rawa Pening in Central Java

2016 ◽  
Vol 1 (3) ◽  
pp. 23 ◽  
Author(s):  
Sulastri ◽  
Cynthia Henny ◽  
Unggul Handoko
Keyword(s):  
Water Quality ◽  
Trophic State ◽  
Trophic Status ◽  
State Level ◽  
Eutrophic Lake ◽  
Water Volume ◽  
Nutrient Concentrations ◽  
Trophic State Index ◽  
High Concentration ◽  
Sediment Loads

Due to continuous problems of eutrophication, Lake Rawa Pening has been included into the 15 priority lakes in Indonesia to be saved from damage. This study aimed to clarify the current environmental conditions and trophic status of Lake Rawa Pening as a basis to control the eutrophication. Sediment loads, water quality, and nutrient concentrations were measured in the tributaries of lake inflow, within the lake, and at the point of lake outflow. The study was conducted in May, June, July, and August 2013. Water transparency, temperature, pH, turbidity, conductivity, and dissolved oxygen were measured in situ. Nitrogen, nitrate, total phosphorus, orthophosphate, TSS, and chlorophyll-a parameters were analyzed using standard method procedures. The Trophic State Index was used to determine the trophic state level. Hydroclimatological conditions showed that seasonally, fluctuation of water volume and discharge of lake followed the pattern of rainfall fluctuation. The sediment loads and nutrient concentration in the tributary inflow were more abundant than those in the lake  and  lake outflow. The results indicated that Lake Rawa Pening acts as sediment and nutrient sinks. Spatially and temporally, Lake Rawa Pening showed high variation of water quality. High concentration of nutrients observed during the wet and dry seasons indicated that the nutrients in the lake originated not only from external but also from internal sources. The overall results show that Lake Rawa Pening is a eutrophic lake, in which phosphorus seems to play a major role in causing eutrophication and massive growth of water hyacinth. <br /><br /><br />

scholarly journals Trophic state and recreational value of Lake Mikołajskie

2016 ◽  
Vol 16 (3) ◽  
pp. 147-154 ◽  
Author(s):  
Justyna Sieńska ◽  
Julita Dunalska ◽  
Michał Łopata ◽  
Katarzyna Parszuto ◽  
Renata Tandyrak
Keyword(s):  
Total Phosphorus ◽  
Surface Waters ◽  
Trophic State ◽  
Trophic Status ◽  
Water Environment ◽  
Eutrophic Lake ◽  
Lake Area ◽  
Negative Effects ◽  
Secchi Disc ◽  
Status Index

Abstract Lakes along with their surroundings are an attractive landscape component that play an important role in recreation and relaxation. In Poland, the Great Masurian Lakeland, visited by a million tourists every year, is considered to be the most attractive lake area. However, tourist pressure has several negative effects which cause degradation of the water environment. The aim of this study was to determine the trophic state of Lake Mikołajskie which is a hub for sailing and motorboating traffic. Values of the trophic status index were calculated from the content of total phosphorus, chlorophyll a and Secchi disc visibility, according to the data from the Voivodeship Inspectorate for Environmental Protection. In summer, the concentration of total phosphorus was 0.019–0.042 mg dm−3 in 2013 and 0.022–0.055 mg dm−3 in 2014. The concentration of chlorophyll a was in the range of 8.3–45.0 μg dm−3 in 2013 and 8.9–22.0 μg dm−3 in 2014. The maximum visibility of Secchi disc reached 2.0 m (2013) and 1.8 m (2014). Based on the calculated, Lake Mikołajskie can be classified as a eutrophic lake. In order to protect lakes from degradation tourists should be educated about the rational use of surface waters and the surrounding catchment. However, it is not only the massive influx of tourists, but also the activity of residents (dictated by economic reasons) that contribute to the pollution of lakes. Therefore, the development of tourism and the economy of the whole region should be harmonious and balanced so that the natural resources can serve us and future generations for as long as possible.

scholarly journals Diversity of rotifer communities in lakes of the Suwalki Landscape Park

2016 ◽  
Vol 16 (4) ◽  
pp. 207-211 ◽  
Author(s):  
Jolanta Ejsmont-Karabin ◽  
Andrzej Górniak ◽  
Maciej Karpowicz
Keyword(s):  
Species Richness ◽  
Trophic State ◽  
Abiotic Factors ◽  
Low Frequency ◽  
Lake Depth ◽  
Deep Lakes ◽  
Natural Rate ◽  
Percentage Similarity ◽  
Rotifer Communities

Abstract Studies of summer rotifer fauna of 11 shallow and 6 deep lakes of the Suwałki Landscape Park were conducted in an aim to assess the role of lake depth and biotic and abiotic factors in determining the diversity of rotifer communities in lakes undergoing a natural rate of eutrophication not accelerated by anthropopression. Some differences were observed when the group of shallow lakes was compared with that of deep lakes. The former were more differentiated as regards a list of rotifer species, partly due to the high proportion of species with low frequency. Consequently, their faunal originality was markedly higher and values of the percentage similarity of rotifer communities were much lower than in deep lakes. Species richness of rotifer fauna was also dependent on the trophic state of the studied lakes, the character of a nutrient limiting primary production, as well as biomass of diatoms and green algae.

Is zooplankton an indicator of the water trophic level in dam reservoirs?

2018 ◽  
Vol 47 (3) ◽  
pp. 288-295 ◽  
Author(s):  
Agnieszka Pociecha ◽  
Irena Bielańska-Grajner ◽  
Hanna Kuciel ◽  
Agata Z. Wojtal
Keyword(s):  
Trophic Level ◽  
Trophic State ◽  
Trophic Status ◽  
Zooplankton Community ◽  
Species Density ◽  
Species Structure ◽  
Dam Reservoir ◽  
Keratella Cochlearis ◽  
Dam Reservoirs ◽  
Total Species

Abstract The trophic state of ten dam reservoirs was assessed using a zooplankton community. In order to determine the trophic state of dam reservoirs, we used indices calculated on the basis of density and species structure of Rotifera and Crustacea communities. Samples were collected once during summer 2012 in ten dam reservoirs. The largest numbers of zooplankton taxa were found in a lowland high meso-eutrophic dam reservoir (Koronowski) and the lowest ones in a submontane low eutrophic dam reservoir (Lubachowski). The trophic state was determined for the investigated dam reservoirs. In the case of the Rotifera community, the percentage of the tecta form in the Keratella cochlearis population and the proportion of high-trophic species in the total species density were the best indices to describe the water trophic status. In the case of the crustacean community, the best indices were the density of Crustacea and the biomass of Cyclopoida. The high value of all indices calculated on the basis of density and species structure of Rotifera and Crustacea was determined for Zygmunt August Lake, whose trophic status was defined as highly eutrophic to polytrophic. Our study has shown that zooplankton could be a good ecosystem indicator of the water trophic level in dam reservoirs.

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