Benthic Communities of Coastal Water Bodies at Different Stages of Isolation from the White Sea in the Vicinity of the White Sea Biological Station, Moscow State University, Kandalaksha Bay, White Sea

Mardashova, M. V.; Voronov, Dmitry A.; Krasnova, E. D.

doi:10.1134/s1062359020090095

Cited by 7 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The second example is the lagoon on Cape Zeleny [38]. Benthos [39], coastal vegetation [40], microbial community [41], and partly zooplankton [42,43] were studied in this lagoon, but information on PhP is still fragmentary [1,44]. The aim of this work is to trace the seasonal dynamics of PhP in the coastal meromictic lagoon on Cape Zeleny, partially isolated from the White Sea.…”

Section: Introductionmentioning

confidence: 99%

Annual Dynamics of a Layered Phytoplankton Structure in a Meromictic Lagoon Partially Isolated from the White Sea

Radchenko,

Aksenova,

Voronov

et al. 2023

Diversity

View full text Add to dashboard Cite

In a saline semi-isolated lagoon on Cape Zeleny (White Sea), the annual dynamics of the vertical hydrological structure and the seasonal dynamics of phytoplankton were traced. Species composition, vertical distribution, abundance, nutrition type, and biomass were analyzed. In total, 293 species and supraspecific taxa of algae and cyanobacteria were found. Most of the identified species are marine, and 38 species are freshwater. Taxonomic composition changed in the lagoon throughout the year. Dinoflagellates dominated in winter and early June; unidentified cocci and flagellates in July; diatoms, dinoflagellates, and unidentified cells in August; dinoflagellates in September; and unidentified cocci and flagellates in October–November. The abundance of algae also changed in the lagoon throughout the year. The integrated biomass in the water column varied from 0.01 g C/m2 in January to 0.78 g C/m2 in early September. According to the environmental parameters, the water column of the lagoon was subdivided into several zones with different environmental conditions and corresponding phytoplankton communities. The similarity between the communities of different horizons was 32–46% in summer and 7% in winter. The chemocline layer was the most populous. It contained a maximum of phytoplankton biomass, 1–2 orders of magnitude higher than that in the overlying horizons. Despite the connection to the sea, the phytoplankton structure in the surface water layer in the lagoon and in the sea differed significantly in composition, quantitative parameters, and seasonal dynamics. The similarity between the communities never exceeded 50%. In terms of biomass dynamics, the lagoon lagged behind the sea until mid-summer, but, starting from August, it outnumbered it, and the phytoplankton development in the lagoon lasted longer, until late autumn. According to sequential tests DistLM, the phytoplankton structure and dynamics in the lagoon and in the sea were related to the daylength, water salinity, oxygen content, and pH by 24.5%. At the same time, the PhP structure did not depend on water temperature, underwater illuminance, or depth. Oxygen content and pH were defined by PhP activity. Salinity serves as a vector of the vertical sequence of ecological niches. The day length seems to be the crucial factor of the seasonal PhP dynamics in the semi-isolated coastal stratified lakes and lagoons.

show abstract

Section: Introductionmentioning

confidence: 99%

Annual Dynamics of a Layered Phytoplankton Structure in a Meromictic Lagoon Partially Isolated from the White Sea

Radchenko,

Aksenova,

Voronov

et al. 2023

Diversity

View full text Add to dashboard Cite

show abstract

“…Data were collected at Vodoprovodnoye Lake, which is located near the Arctic Circle, in the vicinity of the White Sea Biological Station of Lomonosov Moscow State University. It is a small shallow freshwater lake with a maximum depth of about 2.7 m and a surface area of about 0.6 ha (Bizina, 2000 ; Mardashova et al, 2020 ; A. N. Pantyulin, personal communication). Secchi disk transparency regularly recorded during the study period in 2013 was 1.4 ± 0.2 m (mean ± SD; n = 23), which suggests a eutrophic state (Bigham Stephens et al, 2015 ).…”

Section: Methodsmentioning

confidence: 99%

Section: Study Site and Ecological Environmentmentioning

confidence: 99%

Temporal resolution of birth rate analysis in zooplankton and its implications for identifying strong interactions in ecology

Polishchuk

Kasparson

2023

Ecology and Evolution

View full text Add to dashboard Cite

Expanding on Haeckel's classical definition, ecology can be defined as the study of strong and weak interactions between the organism and the environment, hence the need for identifying strong interactions as major drivers of population and community dynamics. The solution to this problem is facilitated by the fact that the frequency distribution of interaction strengths is highly skewed, resulting in few or, according to Liebig's law of the minimum, just one strong interaction. However, a single strong interaction often remains elusive. One of the reasons may be that, due to the ever-present dynamics of ecological systems, a single strong interaction is likely to exist only on relatively short time intervals, so methods with sufficient temporal resolution are required. In this paper, we study the temporal resolution of contribution analysis of birth rate in zooplankton, a method to assess the relative strength of bottom-up (food) versus top-down (predation) effects. Birth rate is estimated by the Edmondson-Paloheimo model. Our test system is a population of the cladoceran Bosmina longirostris inhabiting a small northern lake with few planktivorous predators, and thus likely controlled by food. We find that the method's temporal resolution in detecting bottom-up effects corresponds well to the species' generation time, and the latter seems comparable to the lifetime of a single strong interaction. This enables one to capture a single strong interaction "on the fly," right during its time of existence.We suggest that this feature, the temporal resolution of about the lifetime of a single strong interaction, may be a generally desirable property for any method, not only the one studied here, intended to identify and assess strong interactions. Success in disentangling strong interactions in ecological communities, and thus solving one of the key issues in ecology, may critically depend on the temporal resolution of the methods used.

show abstract

“…On the coast of the White Sea, due to post-glacial uplift, some water bodies with stable stratification were formed, which are at different stages of isolation from the sea [4][5][6][7]. The hydrological feature of the meromictic water bodies found on the coast of the White Sea is a specific vertical stratification of the water column with a transition from surface fresh (or brackish) water to salt water at a depth caused by the overlay of marine water by fresh runoff.…”

Section: Introductionmentioning

confidence: 99%

Optical Proxies of Euxinia: Spectroscopic Studies of CDOM, Chlorophyll, and Bacteriochlorophylls in the Lagoon on Zeleny Cape (the White Sea)

et al. 2023

Self Cite

View full text Add to dashboard Cite

Along the shoreline of the White Sea, due to the post-glacial uplift of the coast, some water bodies with stable stratification have been formed. They have been classified as meromictic as they are at different stages of isolation from the Sea. As separation progresses, significant changes occur in the water column, including the composition of chromophoric dissolved organic matter (CDOM) and the structure of the aquatic microbial community. In this work, we searched for optical proxies of euxinia (anoxic conditions with accumulated hydrogen sulfide) in the water column of the meromictic lagoon on Zeleny Cape. The lagoon is separated from the White Sea basin by a shallow threshold that completely isolates the lagoon during low tide, but marine water enters the lagoon during high tide. The ecosystem in the lagoon is characterized by the marine salinity of water and a high organic matter content in the bottom water and sediments. In this study, spectral methods were used to obtain the depth distribution of CDOM, chlorophyll, and bacteriochlorophyll in the lagoon with strong water stratification and euxinic conditions in the bottom water. The measured optical CDOM characteristics were compared with hydrochemical data (water salinity, Eh, pH, dissolved oxygen), phytoplankton (oxygenic phototrophs), and green sulfur bacteria (anoxygenic phototrophs) distribution along the water column. The spectroscopic methods showed to have the advantages of not requiring water sample pre-treatment and allowing rapid sensing of CDOM and photosynthetic pigments at each horizon.

show abstract

Benthic Communities of Coastal Water Bodies at Different Stages of Isolation from the White Sea in the Vicinity of the White Sea Biological Station, Moscow State University, Kandalaksha Bay, White Sea

Cited by 7 publications

References 6 publications

Annual Dynamics of a Layered Phytoplankton Structure in a Meromictic Lagoon Partially Isolated from the White Sea

Annual Dynamics of a Layered Phytoplankton Structure in a Meromictic Lagoon Partially Isolated from the White Sea

Temporal resolution of birth rate analysis in zooplankton and its implications for identifying strong interactions in ecology

Optical Proxies of Euxinia: Spectroscopic Studies of CDOM, Chlorophyll, and Bacteriochlorophylls in the Lagoon on Zeleny Cape (the White Sea)

Contact Info

Product

Resources

About