Algae, cyanobacteria, and microscopic fungi complexes in the Rybachy Peninsula soils, Russia

2017 ◽  
Vol 7 (2) ◽  
pp. 181-194
Author(s):  
Maria Korneykova ◽  
Vera Redkina ◽  
Regina Shalygina
Keyword(s):  
Species Diversity ◽  
Barents Sea ◽  
Soil Samples ◽  
Fungal Mycelium ◽  
Tundra Soils ◽  
The Barents Sea ◽  
Cryogenic Soils ◽  
Colony Forming Units ◽  
Different Types ◽  
Organic Horizons

The investigation of algal-mycological complexes in the Rybachy Peninsula soils was carried out. The different types of tundra soils (Al-Fe-humus podzols, podburs, dry-peaty, peats low moor, cryogenic, undeveloped soils) were researched. The soil samples were collected along the route from Bolshaya Volokovaya Bay, which is in the Barents Sea, to the west of the Cape Nemetskiy. The organic horizons of the tundra podzols and podburs on the Rybachy Peninsula are less acid in comparison with the continental tundra soils of the region. Number of microfungi in the Peninsula soils varied from 9 to 70 thousand colony-forming units per 1 g of soil (CFU/g). It was the least in the cryogenic soils. The fungal mycelium length was significant in all the soils with the exception of the undeveloped one – more than 1 thousand m in 1 g of soil. The biomass amounted to 1.7 mg/g of soil. The species diversity of the soil micromycetes complexes is represented by 12 species. The species Penicillium decumbens dominated by the abundance and frequency of occurrence in the podburs, dry-peaty soils, podzols and peats low moor soils. P. raistrickii and P. glabrum predominated in the undeveloped soils, while Mortierella stylospora prevailed in the cryogenic soils. 62 eukaryotic algae as well as 18 species of cyanobacteria were found in the soil samples from Peninsula. The cryogenic and undeveloped soils, as well as Al-Fe-humus podzols and podburs were characterized by low species diversity, predominantly of green algae of classes Chlorophyceae and Trebouxiophyceae. Cyanobacteria and diatoms were noted by their considerable diversity in the dry-peaty soils and peats low moor soils.

scholarly journals Identifikasi Nematoda Tanah Pada Perkebunan Sawi (Brassica juncea L.) di Kelurahan Landasan Ulin Utara, Banjarbaru, Kalimantan Selatan

2020 ◽  
Vol 2 (2) ◽  
pp. 41-46
Author(s):  
Yusinta Oktaviani ◽  
Abdul Gafur
Keyword(s):  
Species Diversity ◽  
Brassica Juncea ◽  
Soil Samples ◽  
Soil Biota ◽  
Soil Nematodes ◽  
Morphometric Measurements ◽  
Mustard Plant ◽  
High Species Diversity ◽  
Different Types ◽  
Identification Stage

Nematodes are microscopic worms belonging to the soil biota with high species diversity. Nematodes have different compositions in different types of soil and areas. This research is conduct to determine the presence and genus of soil nematodes found in mustard plantations in Landasan Ulin Utara Village, Banjarbaru, South Kalimantan. Soil samples are taken from community vegetable plantations with a depth of 0-20 cm around the mustard plant rhizosphere located in ??Jalan Kurnia and Jalan Sukamara, Landasan Ulin Utara Village, Banjarbaru. Extraction to separate nematodes from soil using the Whitehead & Hemming method (1965) and nematode fixation using the Seinhorst method (1959). Furthermore, the permanent nematode preparations were made for the identification stage by morphological observations and morphometric measurements. The identification results showed that the genera of nematodes found in the study site's soil samples were Iotonchus, Crustorhabditis, Ironus, and Xiphinema.

scholarly journals New Approach on Organizing the Monitoring of Macrophytobenthos in the Russian Arctic

2020 ◽  
Author(s):  
Sergey Malavenda ◽  
Svetlana Malavenda
Keyword(s):  
Climate Change ◽  
Species Diversity ◽  
Barents Sea ◽  
Sampling Station ◽  
Russian Arctic ◽  
New Approach ◽  
Regulatory Documents ◽  
The Barents Sea ◽  
Special Software ◽  
Minimum Number

The minimum number of samples was estimated based on the studies of the distribution of macrophytobenthos. The existing norms of three replicates per sampling station do not always allow to obtain reliable average values. The collection of a large number of samples, especially seasonally, will lead to significant changes in the studied community. It is recommended to put into practice the use of the method of photographing the areas of particular size along transects for further analysis using special software. It is proposed also to amend the existing regulatory documents on sampling of macrophytobenthos in the Barents Sea and other seas of the Russian Arctic. In particular, it is worth making the most of landscape surveys and mapping. The development of a monitoring system for species diversity and macrophytobenthos distribution in the seas of the Russian Arctic is justified in regard to the monitoring of the community state, including that considering the climate change.

scholarly journals Polychaete diversity patterns on two Arctic shelves: impacts of ice and primary production?

Zoosymposia ◽  
2009 ◽  
Vol 2 (1) ◽  
pp. 457-485 ◽  
Author(s):  
WILLIAM G. AMBROSE, JR. ◽  
PAUL E. RENAUD ◽  
SABINE K.J. COCHRANE ◽  
STANISLAV G. DENISENKO ◽  
JOFRID SKARÐHAMAR
Keyword(s):  
Grain Size ◽  
Species Diversity ◽  
Organic Carbon ◽  
Primary Production ◽  
Barents Sea ◽  
Ice Cover ◽  
Small Scale ◽  
Algal Pigments ◽  
Sediment Grain Size ◽  
The Barents Sea

We used data sets from two Arctic shelves to examine relationships between primary production (or a proxy), ice cover, and the diversity of polychaetes. Benthic samples were collected from the Northeast Water Polynya on the Northeast Greenland shelf and from the Barents Sea. Each of these areas is characterized by large differences in seasonal ice cover and primary production on a mesoscale. In addition to enumerating polychaete diversity, we also quantified the concentration of benthic algal pigments, sediment percent organic carbon, ice cover for the four years preceding sampling, and sediment grain size. In the Barents Sea, primary production was estimated from an ecosystem model. In both northeast Greenland and the Barents Sea, locations with lower primary production (Barents Sea) or proxies for primary production (benthic algal pigments: Greenland and Barents Sea), exhibited the greatest taxonomic richness. In Greenland, the area with the lowest concentration of benthic pigments had an ES(201) up to 30% higher than values from areas with four times more pigments. In the Barents Sea, ES(201) was greatest in the North under heaviest ice cover (>25% cover per year), again approximately 30% higher than in the South (<15% cover) or under the Polar Front (15–25% cover). Other factors also explained diversity: multiple regressions and Principal Component Analysis indicated that grain size, water depth and concentration of sediment organic carbon were important predictors of species diversity (Shannon-Wiener Index and Simpson’s Reciprocal Index), but the results of these analyses were occasionally different from the patterns observed in the species accumulation curves or ES(201) values. Simpson’s Index indicated that high ice-cover (and low primary production and benthic pigment) areas in the Barents Sea had greater evenness (lower dominance) than regions with higher indicators of food supply to the benthos. Low resource levels may prevent a few species from becoming very abundant and out-competing rare species. Diversity indices from northeast Greenland did not vary significantly among regions. We did not address habitat heterogeneity, but patchy distribution of food, combined with small- scale sediment heterogeneity also could enhance richness in food-poor areas. While the mechanism for the relationship between polychaete species richness and ice concentration or primary production is not clear, it does suggest that a change in polychaete diversity may need to be added to the list of possible responses of the benthos to climate-driven changes in ice cover.

scholarly journals Species diversity of seaweeds in different areas of the Barents Sea

Vestnik MGTU ◽  
2017 ◽  
Vol 20 (2) ◽  
pp. 336-351
Author(s):  
S. V. Malavenda ◽  
◽  
E. V. Shoshina ◽  
V. I. Kapkov ◽  
◽  
...  
Keyword(s):  
Species Diversity ◽  
Barents Sea ◽  
The Barents Sea

Acidity in organic horizons of arctic soils on the Barents Sea coast

2017 ◽  
Vol 50 (11) ◽  
pp. 1283-1293 ◽  
Author(s):  
E. V. Shamrikova ◽  
S. V. Deneva ◽  
O. S. Kubik ◽  
V. V. Punegov ◽  
E. V. Kyz”yurova ◽  
...  
Keyword(s):  
Barents Sea ◽  
Arctic Soils ◽  
The Barents Sea ◽  
Organic Horizons ◽  
Sea Coast

Method application of optimal multi-parameter analysis to assess the distribution of water masses as an example of CTD data of the Barents Sea in summer 2017

2019 ◽  
pp. 38-51
Author(s):  
Valeriy G. Yakubenko ◽  
Anna L. Chultsova
Keyword(s):  
Barents Sea ◽  
Field Measurements ◽  
Structural Similarity ◽  
Water Masses ◽  
Parameter Analysis ◽  
Water Dynamics ◽  
Phosphorus Concentration ◽  
Nitrogen And Phosphorus ◽  
The Barents Sea ◽  
Expert Assessments

Identification of water masses in areas with complex water dynamics is a complex task, which is usually solved by the method of expert assessments. In this paper, it is proposed to use a formal procedure based on the application of the method of optimal multiparametric analysis (OMP analysis). The data of field measurements obtained in the 68th cruise of the R/V “Academician Mstislav Keldysh” in the summer of 2017 in the Barents Sea on the distribution of temperature, salinity, oxygen, silicates, nitrogen, and phosphorus concentration are used as a data for research. A comparison of the results with data on the distribution of water masses in literature based on expert assessments (Oziel et al., 2017), allows us to conclude about their close structural similarity. Some differences are related to spatial and temporal shifts of measurements. This indicates the feasibility of using the OMP analysis technique in oceanological studies to obtain quantitative data on the spatial distribution of different water masses.

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