Anthropogenic carbon as a basal resource in the benthic food webs in the Neva Estuary (Baltic Sea)

Голубков, С. М.; Golubkov, Mikhail; Tiunov, Alexei V.

doi:10.1016/j.marpolbul.2019.06.037

Cited by 19 publications

(20 citation statements)

References 55 publications

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“…At the same time, freshwater and euryhaline species increase biodiversity in the freshened parts of the Baltic. Amongst them are species that benefit from organic and nutrient enrichment (Balushkina and Golubkov 2018;Golubkov et al 2019).…”

Section: Composition and Succession Of Zoobenthosmentioning

confidence: 99%

“…The explosive development of non-indigenous worms Marenzelleria occurred in the eastern part of the Gulf of Finland in 2009 after a series of hypoxicanoxic events that led to the decline of native zoobenthos communities, which were dominated by the amphipod M. affinis and the isopod S. entomon, over a large area of the Gulf (Maximov 2015). Currently, M. arctia dominates the zoobenthos of the easternmost Gulf of Finland (Maximov 2015;Golubkov et al 2017Golubkov et al , 2019.…”

Section: Introductionmentioning

confidence: 99%

“…SIA can detect potential diet overlap and feeding competition between species and estimating the proportion of different preys and carbon sources in the diet (e.g. Zwerschke et al 2018;Golubkov et al 2019;Verstijnen et al 2019;Golubkov et al 2020a;Haubrock et al 2020). Accordingly, it can be used to investigate and predict the impact of invasive species on native ones and on the whole local communities (Haubrock et al 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Outputs from the Bayesian models are in the form of the probability distributions, rather than just summaries of all feasible solutions. As a result of the informative predictions generated by the Bayesian mixing model approach, the SIAR modelling method has become a standard quantitative application for estimating diet resources (Layman et al 2012;Colborne et al 2016;Golubkov et al , 2019.…”

Section: Introductionmentioning

confidence: 99%

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Food-web modification in the eastern Gulf of Finland after invasion of Marenzelleria arctia (Spionidae, Polychaeta)

Голубков¹,

Tiunov²,

Golubkov³

2021

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The paucity of data on non-indigenous marine species is a particular challenge for understanding the ecology of invasions and prioritising conservation and research efforts in marine ecosystems. Marenzelleria spp. are amongst the most successful non-native benthic species in the Baltic Sea during recent decades. We used stable isotope analysis (SIA) to test the hypothesis that the dominance of polychaete worm Marenzelleria arctia in the zoobenthos of the Neva Estuary after its invasion in the late 2000s is related to the position of this species in the benthic food webs. The trend towards a gradual decrease in the biomass of Marenzelleria worms was observed during 2014–2020, probably due to significant negative relationships between the biomass of oligochaetes and polychaetes, both of which, according to SIA, primarily use allochthonous organic carbon for their production. The biomass of benthic crustaceans practically did not change and remained very low. The SIA showed that, in contrast to the native crustacean Monoporeia affinis, polychates are practically not consumed either by the main invertebrate predator Saduria entomon, which preys on M. affinis, oligochaetes and larvae of chironomids or by benthivorous fish that prefer native benthic crustaceans. A hypothetical model for the position and functional role of M. arctia in the bottom food web is presented and discussed. According the model, the invasion of M. arctia has created an offshoot food chain in the Estuary food webs. The former dominant food webs, associated with native crustaceans, are now poorly developed. The lack of top-down control obviously contributes to the significant development of the Marenzelleria food chain, which, unlike native food chains, does not provide energy transfer from autochthonous and allochthonous organic matter to the upper trophic levels. The study showed that an alien species, without displacing native species, can significantly change the structure of food webs, creating blind offshoots of the food chain.

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Section: Composition and Succession Of Zoobenthosmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Food-web modification in the eastern Gulf of Finland after invasion of Marenzelleria arctia (Spionidae, Polychaeta)

Голубков¹,

Tiunov²,

Golubkov³

2021

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“…A more detailed description of the estuary is given in Telesh et al (2008). The Neva Estuary is the recipient of discharges of treated and untreated wastewaters from St. Petersburg City, which is the largest megalopolis in the Baltic region with a population of more than five million citizens (Golubkov et al, 2019). The estuary area is intensively used for recreation, sport and commercial fishing, different industries, including the nuclear power station, and shipping.…”

Section: Study Areamentioning

confidence: 99%

Effects of Environmental Gradients on the Biomass of Alien Cercopagis pengoi in the Neva Estuary

2020

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Biological invasions are a global trend due to globalization of the world. An important goal of invasion biology is to identify environmental characteristics that may make a region receptive to invasions. We tested the hypothesis that environmental variables have stronger effect on the biomass of the alien Cercopagis pengoi in the Neva Estuary than biotic interactions with other zooplankton species. Hierarchical cluster, principal component and Pearson correlation analyzes were used to elucidate changes within the zooplankton community along environmental gradients. The data analysis showed that the biomass of C. pengoi was higher in waters with higher salinity, low temperature, high transparency, lower chlorophyll a concentration and lower proportion of chlorophyll in particulate suspended matter. The biomass of C. pengoi showed significant positive correlations with biomasses of its potential preys. However, we did not find direct significant negative correlations between C. pengoi and larger zooplankton predators Leptodora kindtii and Bythotrephes spp. This research generally supports the hypothesis that if environmental variables are appropriate for an exotic species, then that species is likely to invade successfully, regardless of the native species already present.

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Co-occurrence and potential resource partitioning between oligochaetes and chironomid larvae in a sediment depth gradient

et al. 2021

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Although detritivorous Tubificinae and chironomid larvae are important groups in functioning of both, fresh and brackish water ecosystem, their co-occurrence patterns in sediment is weakly known. We carried out two-year-long research in the brackish Vistula Lagoon (southern Baltic Sea), where both Tubificinae (Limnodrilus hoffmeisteri and Potamothrix hammoniensis) and larvae of Chironomus balatonicus occur in high densities. Because of different source of their food, we hypothesized that the ecological interactions between those two groups of detritivores are not antagonistic, thus allowing for their co-occurrence along the depth of sediment profile with lack of competition for space. Here we show that maximum burrowing depth, occasionally reaching 25 cm was significantly affected by the total density of the each group in the entire core. Tubificinae and C. balatonicus showed the highest density at 0–10 cm depth, where they co-occurred most frequently, with significant co-occurrence in the layers of 0–2 cm and 2–5 cm. We propose a hypothetical model of interactions between apparently the same functional groups and the complementary role they play in sediment reworking. It points to their coexistence in the shared microhabitat, but using space and food resources differently. Also, the consequences of their activity and habitat structuring are opposite—Chironomus larvae mostly affect the deeper layers of the sediments, while Oligochaeta both the deeper and surface layers. Thus, their requirements and ecological roles seem not to overlap, preventing competitive exclusion and allowing for co-occurrence.

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Anthropogenic carbon as a basal resource in the benthic food webs in the Neva Estuary (Baltic Sea)

Cited by 19 publications

References 55 publications

Food-web modification in the eastern Gulf of Finland after invasion of Marenzelleria arctia (Spionidae, Polychaeta)

Food-web modification in the eastern Gulf of Finland after invasion of Marenzelleria arctia (Spionidae, Polychaeta)

Effects of Environmental Gradients on the Biomass of Alien Cercopagis pengoi in the Neva Estuary

Co-occurrence and potential resource partitioning between oligochaetes and chironomid larvae in a sediment depth gradient

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