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.

scholarly journals The development of the eutrophication process in Dobczyce reservoir

2018 ◽  
Vol 45 ◽  
pp. 00055 ◽  
Author(s):  
Elena Neverova-Dziopak ◽  
Zbigniew Kowalewski
Keyword(s):  
Surface Waters ◽  
Aquatic Ecosystems ◽  
Trophic Status ◽  
Low Cost ◽  
State Assessment ◽  
Dam Reservoir ◽  
Dam Reservoirs ◽  
Abatement Strategies ◽  
Global Threat ◽  
Primary Problem

Eutrophication is currently a global threat to all types of aquatic ecosystems leading to a disturbance of their ecological balance and a deterioration of water quality. This problem is especially true for dam reservoirs, which play a key role in the economy of each country, being an important source of water supply. It is also a primary problem for all types of surface waters in Poland. Effective eutrophication abatement strategies should be based on reliable information about the actual trophic status of waters which in turn should be obtained with fast, accurate and low-cost monitoring. The aim of this paper is to investigate the possibility of the application of aggregated numerical indicators as an effective tool for the assessment of water trophic status and prove it using the example of the trophic state assessment of the Dobczyce dam reservoir. For this purpose, three numerical indicators elaborated by different authors were used.

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.

scholarly journals The Planktonic Rotifer Community in a Lake Restored with Selective Hypolimnetic Withdrawal

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2194
Author(s):  
Magdalena Bowszys ◽  
Elżbieta Bogacka-Kapusta
Keyword(s):  
Species Diversity ◽  
Trophic State ◽  
Zooplankton Community ◽  
Positive Outcome ◽  
Water Withdrawal ◽  
Species Structure ◽  
Rotifer Community ◽  
Wet Biomass ◽  
Northeastern Poland ◽  
Qualitative Changes

The objective of this study was to analyze variations in the planktonic rotifer community in a lake subjected to hypolimnetic withdrawal. The present study is also the first attempt to estimate the effects of changes in hypolimnion water withdrawal rates on the zooplankton community. The lake is located in northeastern Poland. Zooplankton were sampled in 1986, 2004 and 2013. Standard protocols of zooplankton sampling and elaboration were applied. Rotifer abundance, wet biomass, community structure, and species diversity were studied at different intensities of hypolimnetic water withdrawal. Trophic state indices based on rotifer abundance and species structure were used to evaluate changes in the trophic state of the lake. Our results showed increased planktonic rotifer species diversity over a period of years, which was a positive outcome of the restoration measures. Lower hypolimnetic withdrawal rates seemed to favor the development of a diverse rotifer community. Conversely, qualitative changes in zooplankton structure and a zooplankton-based assessment of the lake trophic state indicated that water eutrophication was progressing. Despite modifications to the operation of the pipeline, no significant differences in rotifer abundance or biomass were detected between the sites in each year or among years at each site.

scholarly journals Composition and abundance of zooplankton in the limnetic zone of seven reservoirs of the Paranapanema River, Brazil

2002 ◽  
Vol 62 (3) ◽  
pp. 525-545 ◽  
Author(s):  
E. V. SAMPAIO ◽  
O. ROCHA ◽  
T. MATSUMURA-TUNDISI ◽  
J. G. TUNDISI
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Trophic State ◽  
Zooplankton Community ◽  
The Other ◽  
Zooplankton Species ◽  
Keratella Cochlearis ◽  
Rotifer Species ◽  
Main River ◽  
Ceriodaphnia Cornuta

The species composition and abundance of the zooplankton community of seven reservoirs of the Paranapanema River, located between 22º37'-23º11'S and 48º55'-50º32'W, were analysed over four periods, in the year of 1979. The zooplankton community was composed of 76 species of Rotifera, 26 species of Cladocera and 7 species of Copepoda. For a large part of the period under study the Rotifera were dominant, followed by Copepoda. The Piraju and Salto Grande reservoirs, which occupy intermediate positions in the cascade of reservoirs, were richest in species, most of them belonging to Rotifera and Cladocera. In the reservoirs Rio Pari and Rio Novo, lateral to the cascade of reservoirs, a lower species richness was observed, although higher densities of organisms were found than in the other reservoirs located in the main river body. Different rotifer species occurred in succession, being abundant in different periods, with no defined pattern. Among the copepods, Thermocyclops decipiens predominated in the majority of the reservoirs. Ceriodaphnia cornuta was the most abundant cladoceran in the intermediate reservoirs of the cascade, and Daphnia gessneri, Bosminopsis deitersi and Moina minuta, in the reservoirs lateral to the cascade. The most frequent zooplankton species were Notodiaptomus conifer, Thermocyclops decipiens, Ceriodaphnia cornuta cornuta and C. cornuta rigaudi, Daphnia gessneri, Bosmina hagmanni, Keratella cochlearis and Polyarthra vulgaris. Some relationships were found between the trophic state of the reservoirs and the zooplankton community.

Spatial distribution of water-mobilizable colloids and phosphorus from dam reservoir sediment 

2021 ◽  
Author(s):  
Ngoc Diep Nguyen ◽  
Malgorzata Grybos ◽  
Marion Rabiet ◽  
Véronique Deluchat
Keyword(s):  
Sediment Resuspension ◽  
Ecological Problem ◽  
Dam Reservoir ◽  
Reservoir Sediment ◽  
Sampling Campaign ◽  
Sediment Mass ◽  
Dam Reservoirs ◽  
Phosphorus Form ◽  
P Fraction ◽  
Intrinsic Component

<p>The hydrodynamics of dam reservoirs favor the accumulation of phosphorus (P) in bottom sediments since it has a strong affinity for the sedimentary particles. However mechanical disturbance of sediment (resuspension) may release P back to water column. The load of sedimentary P poses a serious ecological problem related to the maintaining of water eutrophication. The aim of this study was to evaluate the potential of sediments, accumulated in Champsanglard reservoir (Central France), to release water-mobilizable colloidal and dissolved P. A sampling campaign was carried out at different locations along the main channel of reservoir from riverine to lacustrine area and characterized by different hydrodynamics. The results showed that colloids are intrinsic component of reservoir sediment and contribute up to 2.3% of sediment mass. Colloidal P attributed up to 6% of total sedimentary P and 80% of water-mobilizable P (fraction < 1 µm). The stock of water-mobilizable colloids and associated P varied according to particle size distribution and was strongly dependent to channel morphology, hydrodynamics and inlet of tributary.</p><p><strong>Keywords: </strong>Dam reservoir, sedimentary colloids, phosphorus form, spatial variability</p>

scholarly journals Space time evolution of the trophic state of a subtropical lagoon: Lagoa da Conceição, Florianópolis Island of Santa Catarina, Brazil

RBRH ◽  
2017 ◽  
Vol 22 (0) ◽  
Author(s):  
Victor Eduardo Cury Silva ◽  
Davide Franco ◽  
Alessandra Larissa Fonseca ◽  
Maria Luiza Fontes ◽  
Alejandro Rodolfo Donnangelo
Keyword(s):  
Water Column ◽  
Trophic Level ◽  
Algal Blooms ◽  
Trophic State ◽  
Coastal Lagoons ◽  
Principal Component ◽  
Quality Data ◽  
Santa Catarina ◽  
Water Quality Data ◽  
Subtropical Lagoon

ABSTRACT High levels of eutrophication in coastal lagoons due to human activity have been documented worldwide. Among the main impacts observed are anoxia, hypoxia, toxic algal blooms, fish kills, loss of biodiversity and loss of bathing. This study aimed to evaluate the evolution of the trophic state of Lagoa da Conceição, a subtropical lagoon located in an urbanized watershed on the island of Santa Catarina - Brazil. Spatio temporal patterns of stratification and eutrophication were investigated to understand the main biochemical changes over time. The water quality data were obtained from field campaigns supplemented with literature of the last 15 years. The vertical structure of the water column and the trophic state were evaluated by the stratification index and the TRIX index, respectively. Analyses of variance were performed in order to identify possible temporal variations in vertical stratification and trophic level. Eutrophication effects on biogeochemical cycles were verified through a multi-dimensional cluster analysis (MDS) and correlations between variables related to physical, chemical and biological processes were verified by principal component analysis (PCA). The results showed that the water column is homogeneous in all regions except in the central region of the lagoon, and the highest ammonia concentrations and lowest dissolved oxygen concentrations with periods of anoxia are observed in bottom waters. The study looked at the high trophic level of the lagoon and its inability to process the biogeochemical changes imposed by urban development.

scholarly journals KAJIAN KUALITAS PERAIRAN UNTUK PERIKANAN DI RAWA PENING JAWA TENGAH

2017 ◽  
Vol 8 (3) ◽  
pp. 173
Author(s):  
Siti Nurul Aida ◽  
Agus Djoko Utomo
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Trophic Level ◽  
Carrying Capacity ◽  
Water Hyacinth ◽  
Trophic State ◽  
Fish Growth ◽  
Household Waste ◽  
Trophic State Index ◽  
State Index

Perairan Rawa Peningmerupakan tipe perairan yang tergenang dan mempunyai arti penting bagi perikanan. Masalah utama yang ada di Rawa Pening yaitu pendangkalan karena sedimentasi dan eutrofikasi yang disebabkan pencemaran air berasal dari limbah rumah tangga, pertanian dan budidaya perikanan. Penelitian ini bertujuan untukmengetahui tingkat kesuburan perairan dan kualitas air di Rawa Pening. Penelitian dilakukan pada bulan Mei, Juni, Agustus dan Oktober 2013. Frekuensi pengambilan contoh dilakukan empat kali yaitu pada bulan Mei, Juni,Agustus dan Oktober. Stasiun pengamatan meliputi:A. Tengah (Puteran); B.Muara sungai (Torong); C.Area KJA; D. Pemotongan eceng Gondok (tengah 1); E. Sungai keluar (Tuntang); F. Muara sungai (Muncul); G. Tidak ada pemotongan eceng gondok (tengah 2). Data tingkat kesuburan perairan dianalisis dengan metode Carlon’s.Hasil penelitianmenunjukkan bahwa Rawa Pening termasuk katagori perairan dengan tingkat kesuburan tinggi, nilai Thropic State Index (TSI) pada semua stasiun pengamatan berkisar antara 57,22 - 68,06. Kondisi kualitas air yang kurang baik tersebut akanmerugikan perikanan, seperti kejadian kematian ikanmasal, lambatnya pertumbuhan ikan dan penurunan daya dukung perairan.The Rawa Pening waters is a lentic water and has significance for fishery. The main problems in Rawa Pening are silting due to sedimentation and eutrophication due to water pollution from household waste, agriculture and fisheries. The study aims to examine trophic level and water quality. The research conducted on May, June, August and October 2013. There was 7 stations i.e. A. middle (Puteran); B. inlet of Torong; C. Location of aquaculture;D. locations where harvesting of water hyacinth occurred (middle1); E. outlet (Tuntang); F. inlet (Muncul); G. location where no harvest of water hyacinth (middle 2). Trophic level were analyzed by Carlon’s method. The results showed that Rawa Pening waters categorized as the high eutrophication level where the Trophic State Index (TSI) was 57. 22 to 68. 06. The low water quality will be detrimentaled to fisheries, such as mass fish death, slow fish growth and also a decline of carrying capacity of ecosystem.

scholarly journals Fluctuations of the population of Daphnia laevis Birge 1878: a six-year study in a tropical lake

2012 ◽  
Vol 72 (3) ◽  
pp. 479-487 ◽  
Author(s):  
LPM. Brandão ◽  
T. Fajardo ◽  
E. Eskinazi-Sant'Anna ◽  
S. Brito ◽  
P. Maia-Barbosa
Keyword(s):  
Chlorophyll A ◽  
Total Phosphorus ◽  
Trophic State ◽  
Trophic Status ◽  
Seasonal Pattern ◽  
Ecological Research ◽  
Total Phosphorous ◽  
Long Term Ecological Research ◽  
Physical And Chemical

The fluctuation of the population of Daphnia laevis in Lake Jacaré (Middle River Doce, Minas Gerais) was monitored monthly (at one point in the limnetic region) for six years (2002-2007) as part of the Program of Long-Term Ecological Research (LTER/UFMG). The following parameters were also monitored: water temperature, pH, electrical conductivity, dissolved oxygen, chlorophyll a, total phosphorus, phosphate, total nitrogen, nitrate, nitrite, ammonia, and densities of Chaoborus and ephippia of Daphnia laevis in the sediment. A seasonal pattern was observed in the fluctuation of D. laevis, with higher densities recorded during periods of circulation (May-August). A significant correlation was found between the density of D. laevis and temperature (r = -0.47, p = 0.0001), chlorophyll-a (r = -0.32, p = 0.016) and indicators of the lake's trophic status (total phosphorus, r = 0.32, p = 0.007 and trophic state, r = 0.36, p = 0.003), as well as Chaoborus density (r = 0.43 and p = 0.002). These results indicate that changes in the physical and chemical characteristics of the water related with stratification and circulation of the lake may have a direct (temperature, total phosphorous) or an indirect (food availability, presence of predators, ephippia eclosion) influence on the fluctuation of the D. laevis population.

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