scholarly journals Spatial distribution of zooplankton in the Kolsaiskie mountain lakes (Kungey Ala Tau, south-east Kazakhstan) and its connection with environment factors

2019 ◽  
Vol 46 (3) ◽  
pp. 278-289
Author(s):  
E. G. Krupa ◽  
S. S. Barinova ◽  
S. M. Romanova
Keyword(s):  
Spatial Distribution ◽  
Zooplankton Community ◽  
Mountain Lakes ◽  
Low Concentrations ◽  
Fish Reduction ◽  
Allochthonous Species ◽  
East Kazakhstan ◽  
Recreational Use ◽  
Average Individual ◽  
Individual Mass

The values of Clark W-statistics, ∆-Shannon-Weaver, and an average individual mass of specimen were used to characterize the spatial distribution of zooplankton in the Kolsay lakes. With a relatively constant species composition, the interannual dynamics of the size and quantity variables of zooplankton testified to an increase in the eutrophication processes of three of the four Kolsay lakes. Interannual changes in the structure of the zooplankton community were mostly determined by the introduction of allochthonous species of fish, reduction of the water level, and enhancement of biogenic load due to recreational use of the lakes. The effect of very low concentrations of heavy metals on the dimensional variables of zooplankton can be connected with the oligotrophic status of Kolsaiskie lakes.

scholarly journals ZOOPLANKTON SPATIAL DISTRIBUTION AND COMMUNITY STRUCTURE IN BANGGAI SEA

2012 ◽  
Vol 4 (2) ◽  
Author(s):  
Arief Rachman ◽  
Elly Asniariati
Keyword(s):  
Spatial Distribution ◽  
Community Structure ◽  
Hot Spot ◽  
Zooplankton Community ◽  
Anthropogenic Activity ◽  
Zooplankton Abundance ◽  
Total Density ◽  
Importance Value ◽  
Zooplankton Community Structure ◽  
Specific Distribution

<p>Banggai Sea is an interesting ecosystem due to mixing influences from Banda Sea in the west and Maluccas Sea in the east. Therefore, a unique zooplankton community structure and specific distribution pattern should be found in this area. This research was carried on using Baruna Jaya VIII research vessel and samples were collected in 14 sampling stations. Vertical towing using NORPAC plankton net (300 μm) was conducted to collect zooplankton samples. Result showed that inner Mesamat Bay had the lowest abundance of zooplankton, probably due to low water quality resulted from anthropogenic activity. Meanwhile the strait between Liang and Labobo Island had the highest zooplankton abundance in Banggai Sea. Calanoids was the dominant zooplankton taxa in the ecosystem and contributing 55.7% of total density of zooplankton community. The highest importance value made this taxa to be very important factor that regulates the lower trophic level organisms. Results also showed that zooplankton was distributed nearly uniform in eastern but aggregated to several stations in western Banggai Sea. Zooplankton abundance was higher in the central of Banggai Sea, compared to western and eastern area. According to Bray-Curtis clustering analysis the strait between Liang and Labobo Island has unique zooplankton community structure. This might happened due to mixing of water from two highly productive seas that influenced the Banggai Sea ecosystem. From this research we conclude that this strait probably was the zooplankton hot spot area which might also indicate that this area also a hot spot of fishes in the Banggai Sea.</p><p>Keywords: spatial distribution, zooplankton, community structure, hot spot, Banggai</p>

scholarly journals Zooplankton as Indicator of the Ecological State of Protected Aquatic Ecosystems (Lake Borovoe, Burabay National Nature Park, Northern Kazakhstan)

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2580
Author(s):  
Elena Krupa ◽  
Sophia Romanova ◽  
Galym Berkinbaev ◽  
Natalya Yakovleva ◽  
Erlan Sadvakasov
Keyword(s):  
Primary Source ◽  
Shannon Index ◽  
Ecological State ◽  
The Past ◽  
Average Abundance ◽  
Nature Park ◽  
The Moment ◽  
The Village ◽  
Average Individual ◽  
Individual Mass

The enrichment of the protected Borovoe Lake with nutrients has taken place within the last 100 years, from the moment the first resort was formed on its shores. The purpose of this study was to assess the current ecological state of Borovoe based on the structure of zooplankton. According to the chemical data, in the summer of 2019, the content of nutrients in the water was, relatively, not high; the content of heavy metals was very low. Twenty-seven species were found in zooplankton. The average abundance of zooplankton was 988.8 thousand ind./m3 with a biomass of 1.52 g/m3. Rotifera dominated. Cladocera sub-dominated. The Shannon index values were 2.31 bit/ind. and 2.57 bit/mg; the values of Clarke’s W-statistics and Δ-Shannon were negative. The abundance of zooplankton increased more than nine times, but the average individual mass of an organism decreased from 0.0112 to 0.0016 mg over the past decade. Despite the relatively low content of nutrients, the structure of zooplankton demonstrated that the nutritional load on Lake Borovoe is currently close to critical. Statistical mapping of the data and redundancy analysis (RDA) showed that the primary source of lake pollution is the village of Borovoe and sanatoriums located on the southeast and northwest coasts.

Effects of Low Concentrations of Cadmium on the Crustacean Zooplankton Community of an Artificially Acidified Lake

1987 ◽  
Vol 44 (S1) ◽  
pp. s163-s172 ◽  
Author(s):  
S. G. Lawrence ◽  
M. H. Holoka
Keyword(s):  
Zooplankton Community ◽  
Toxic Effects ◽  
Crustacean Zooplankton ◽  
Individual Species ◽  
Calanoid Copepods ◽  
Bosmina Longirostris ◽  
Low Concentrations ◽  
Total Community

The toxic effects of cadmium to total community and individual species of zooplankton generally decreased as pH of the lake was experimentally lowered over a number of years by additions of acids. The biomass of crustacean zooplankton held in small impoundment systems suspended in the lake for fourteen days was reduced by 60–70% when pH was 6.7–6.8 and concentrations of Cd were maintained at 1 μg∙L−1, and by 70–80% when Cd was at 3 μg∙L−1. At a pH of 5.9, however, biomass was reduced only 20–30% in concentrations of Cd of 1 μg∙L−1, and at pH 5.6, biomass decreased by only 20% when subjected to 3 μg∙L−1 Cd. The cladocerans Bosmina longirostris and Holopedium gibberum were the most sensitive to cadmium. Cladocerans were more sensitive to cadmium than calanoid copepods, and both these groups were more sensitive then cyclopoid copepods. The decrease in toxicity of cadmium with increasing H+ may be analogous to the inhibition of uptake of cadmium by calcium.

scholarly journals Spatial distribution and secondary production of Copepoda in a tropical reservoir: Barra Bonita, SP, Brazil

2007 ◽  
Vol 67 (2) ◽  
pp. 223-233 ◽  
Author(s):  
MJ. Santos-Wisniewski ◽  
O. Rocha
Keyword(s):  
Spatial Distribution ◽  
Secondary Production ◽  
General Pattern ◽  
Winter Season ◽  
Zooplankton Community ◽  
Zooplankton Biomass ◽  
Tropical Lakes ◽  
Numerical Density ◽  
Dominant Group ◽  
Tropical Reservoir

The present paper aims to describe the spatial distribution of zooplankton copepods, their biomass and instantaneous secondary production, in Barra Bonita, a large eutrophic, polymitic reservoir (22° 29' S and 48° 34' W) on the Tietê River, of the Paraná basin. Sampling was carried out during two seasons: dry winter and rainy summer. Species composition, age structure and numerical density of each copepod species population were analyzed at 25 sampling stations. Secondary production was calculated for Copepoda, the dominant group in zooplankton communities, taking Calanoida and Cyclopoida separately. Copepoda represented the largest portion of the total zooplankton biomass, the dominant species being Notodiaptomus iheringi among the Calanoida and Mesocyclops ogunnus and Thermocyclops decipiens among the Cyclopoida. The production of Copepoda was higher during the rainy summer (23.61 mgDW.m-3.d-1 in January 1995) than during the dry winter season (14 mgDW.m-3.d-1 in August 1995), following the general pattern of abundance for the whole zooplankton community. Among the copepods, Cyclopoida production was higher than that of Calanoida, a pattern commonly observed for tropical lakes and reservoirs. Barra Bonita copepods are very productive, but there was a great degree of spatial heterogeneity, related to the physical and chemical conditions, particularly the level of nutrients and also to phytoplankton biomass.

scholarly journals Two practical approaches to monitoring the zooplanktonic community at Lago Grande do Curuai, Pará, Brazil

2015 ◽  
Vol 45 (3) ◽  
pp. 293-298 ◽  
Author(s):  
Leonardo Fernandes GOMES ◽  
Ludgero Cardoso Galli VIEIRA ◽  
Marie Paule BONNET
Keyword(s):  
Spatial Distribution ◽  
Monitoring Program ◽  
Zooplankton Community ◽  
Species Level ◽  
Genus Level ◽  
Time Costs ◽  
Financial Costs ◽  
Long Term Monitoring ◽  
Term Monitoring

The use of substitute groups in biomonitoring programs has been proposed to minimize the high financial costs and time for samples processing. The objectives of this study were to evaluate the correlation between (i) the spatial distribution among the major zooplankton groups (cladocerans, copepods, rotifers, and testaceans protozoa), (ii) the data of density and presence/absence of species, and (iii) the data of species, genera, and families from samples collected in the Lago Grande do Curuai, Pará, Brazil. A total of 55 sample of the zooplanktonic community was collected, with 28 samples obtained in March and 27 in September, 2013. The agreement between the different sets of data was assessed using Mantel and Procrustes tests. Our results indicated high correlations between genus level and species level and high correlations between presence/absence of species and abundance, regardless of the seasonal period. These results suggest that zooplankton community could be incorporated in a long-term monitoring program at relatively low financial and time costs.

scholarly journals The spatio-temporal evolution of the genus Nitzschia Longissima at the level of the lagoon in Nador, Morocco

2021 ◽  
Vol 234 ◽  
pp. 00081
Author(s):  
Ouassila Riouchi ◽  
Faid El Madani ◽  
Eric Abadie ◽  
Ali Skalli ◽  
Mourad Baghour
Keyword(s):  
Spatial Distribution ◽  
Community Structure ◽  
Light Intensity ◽  
Temporal Evolution ◽  
Warm Season ◽  
Zooplankton Community ◽  
Zooplankton Community Structure ◽  
Planktonic Diatoms ◽  
A Value ◽  
Spatio Temporal

This work aims to study the spatio-temporal evolution of the genus Nitzschia longissima, one of the most important genera of marine plankton diatoms, from 3 sampling stations in the Nador lagoon and during 2 seasons (spring and summer 2018), Using Nitzschia longissima, as a study system, one of the most diverse and abundant genera among marine planktonic diatoms. This species counts, in addition to the form Nitzschia longissima forma parva Grunow, three varieties namely Nitzschia longissima var. closterium (W. Smith) Van Heurck, Nitzschia longissima var. longissima (Breb.) Ralfs and Nitzschia longissima var. reversa Grunow. Nitzschia Longissima genus density was high during the warm season (Summer 2018) with a value of 8000 cells/liter, and low during the cold seasons (Spring 2018), which may be caused by water temperature and zooplankton community structure; and underwater light intensity was an important factor influencing the spatial distribution of Nitzschia density.

Distribution of metallic trace elements (ETM) in surface soils around the Mediouna discharge (southern of Casablanca)

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Trace Elements ◽  
Organic Matter ◽  
Spatial Distribution ◽  
Soil Samples ◽  
The Other ◽  
Surface Soils ◽  
Other Hand ◽  
Metallic Trace Elements ◽  
Low Concentrations ◽  
Uncontrolled Landfill

The objective of present research was to characterize the surface soils located at 300, 600 and 1000 m of an uncontrolled landfill. The work also aims to evaluate the levels and spatial distribution of metallic trace elements (Cd, Pb, Cu, Ni, Zn, Cr, Co and As) in these soils. Soil samples were collected in 36 points around the landfill. Results showed that Cd, Pb, Zn are concentrated in the soils rich in clay and carbonates, and in organic matter, located at 300 m from the landfill. The basic pH of all soils enhances the retention of these metals. On the other hand, As present in soils at 300, 600 and 1000 m at concentrations slightly higher than those of referenced soils were apparently mobilized by water from the solid/water interfaces. The other metals Cu, Ni, Co, Cr are present at very low concentrations.

Spatio-temporal distribution pattern of Calanus sinicus and its relationship with climate variability in the northern Yellow Sea

2017 ◽  
Vol 75 (2) ◽  
pp. 764-772
Author(s):  
Qing Yang ◽  
Hui Liu ◽  
Guize Liu ◽  
Yanbin Gu
Keyword(s):  
Spatial Distribution ◽  
Distribution Pattern ◽  
Yellow Sea ◽  
Cold Water ◽  
Temporal Distribution ◽  
Zooplankton Community ◽  
Central Portion ◽  
Calanus Sinicus ◽  
Northern Yellow Sea ◽  
Spatio Temporal

Abstract The spatio-temporal distribution pattern of Calanus sinicus, a key copepod species, was examined in the northern Yellow Sea (YS). Compared with 1959 and 1982, there was a significant increase in the abundance of C. sinicus in the spring, summer, and autumn of 2011 and winter of 2014. The percentage of C. sinicus in the zooplankton assemblages ranging from 45.6 to 75.8% in different seasons of 2011-2014 was significantly higher than that in 1982. Two different spatial distribution patterns of C. sinicus were observed, with higher abundance occurring nearshore during the cold season (e.g. January) and offshore in the central portion of the northern YS in the warm season (e.g. May, July, and October). The YS Cold Water Mass in the central portion of the northern YS likely provides an important over-summering site for the species. Additionally, a greater increase of the abundance of C. sinicus was found in the northern portion (the northern YS) of its spatial distribution during the past half century. This study has an implication on the climate-driven shifts in zooplankton community in the northern YS, highlighting the importance of C. sinicus in the warm-temperate ecosystem of Chinese coastal seas.

The Spatial Distribution of Nutrient and Heavy Metals in Shouguang Reed Wetland Soil for Receiving Drainage

2010 ◽  
Vol 113-116 ◽  
pp. 1230-1234 ◽  
Author(s):  
Xiao Lei Lv ◽  
Fang Ma ◽  
Li Wei ◽  
Li Wang ◽  
Chang Long Pang
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Spatial Distribution ◽  
Removal Rate ◽  
Flow Direction ◽  
Wetland Soil ◽  
Natural Wetland ◽  
Treatment Wetland ◽  
Low Concentrations ◽  
Wetland Treatment

In this study, a survey for the spatial distribution of heavy metals in Shouguang reed wetland of China was conducted. Samples were collected from water and soil in two parts of the wetland: treatment wetland and natural wetland. The elements including K, Ca, Na, Mg, Al, Fe, As, Cr, Pb, Zn, Mn, Hg were analyzed. The changes of their contents along the flow direction were investigated and the contents in treatment wetland and natural wetland were compared. The data indicates that the contents of nutrient and heavy metals decrease along the flow direction. The soil in Shouguang is saline-alkali. The nutrient elements are enriched, while the heavy metals are in low concentrations. The content of the nutrient and heavy metal in treatment wetland is higher than that in natural wetland. The removal rate of the element is Fe(68.6%), Al(45.8%), K(44.7%), Na (25.7%), Ca(23.1%), Mg(22.8%), Pb(90.45%), Zn (87.83%), Cd(71.16%), Mn(56.75%), Cr(40%). The Hg and Cd are undetected. Contents of As, Cr, Pb ,Zn and Mn in soil are highest in top layer. With the depth increasing, the concentration of heavy metal decreases.

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