Ecosystem changes in the Neva Estuary (Baltic Sea): Natural dynamics or response to anthropogenic impacts?

Голубков, С. М.; Алимов, А. Ф.

doi:10.1016/j.marpolbul.2010.02.014

Cited by 28 publications

(16 citation statements)

References 23 publications

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“…The morphometric and hydrochemical features of the Neva Estuary have been previously described in many publications (e.g. Golubkov and Alimov 2010;.…”

Section: Study Site and Samplingmentioning

confidence: 99%

“…Potamothrix hammoniensis (Michaelsen) and Limnodrilus hoffmeisteri Claparède (Oligochaeta), as well as larvae of Chironomus plumosus (Linnaeus) (Diptera, Chironomidae), were subdominant. Indigenous crustacean S. entomon (Isopoda) and M. affinis (Amphipoda) that dominated in zoobenthos before 2000s (Maximov 2003;Golubkov and Alimov 2010) were rare.…”

Section: Composition and Biomass Of Zoobenthosmentioning

confidence: 99%

“…All these trends are actual for the zoobenthic community in the middle part of the Neva Estuary. Historical data show that, at the beginning of the last century, benthic communities were rather species-poor and dominated by indigenous crustaceans, Monoporeia affinis and Saduria entomon (Golubkov and Alimov 2010). Later, due to the increase in organic pollution from St. Petersburg, the oligochaetes, Potamothrix hammoniensis and Limnodrilus hoffmeisteri and the larvae of Chironomus plumosus, which are typical in fresh or slightly brackish polluted waters, also became common.…”

Section: Composition and Succession Of Zoobenthosmentioning

confidence: 99%

“…Later, due to the increase in organic pollution from St. Petersburg, the oligochaetes, Potamothrix hammoniensis and Limnodrilus hoffmeisteri and the larvae of Chironomus plumosus, which are typical in fresh or slightly brackish polluted waters, also became common. This community existed until the mid-1990s, when, after a series of hypoxic events, the biomass of zoobenthos, especially of hypoxic sensitive crustacean, as well as the energy flow in benthic communities, decreased many times (Golubkov and Alimov 2010;Maximov 2015). The restoration of benthic communities was associated with the development of the alien polychaete Marenzelleria arctia, firstly recorded in 2009, which became the dominant species of zoobenthos (Maximov 2011).…”

Section: Composition and Succession Of Zoobenthosmentioning

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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“…The morphometric and hydrochemical features of the Neva Estuary have been previously described in many publications (e.g. Golubkov and Alimov 2010;.…”

Section: Study Site and Samplingmentioning

confidence: 99%

Section: Composition and Biomass Of Zoobenthosmentioning

confidence: 99%

Section: Composition and Succession Of Zoobenthosmentioning

confidence: 99%

Section: Composition and Succession Of Zoobenthosmentioning

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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“…The Neva Estuary is located at the top of the Gulf of Finland and is the most northeastern part of the Baltic Sea (Golubkov and Alimov, 2010). The primary productivity and biomasses of autotrophic organisms in the estuary are high, mainly due to eutrophic effects of the large nutrient inflow from the Neva River, which is the major contributor of freshwater to the Baltic Sea (Golubkov, 2009;Golubkov and Alimov, 2010;Golubkov et al, 2017). Phytoplankton communities of the estuary include freshwater and marine species; eurytopic species also make up a significant proportion (Golubkov et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Relationships Between Northern Hemisphere Teleconnection Patterns and Phytoplankton Productivity in the Neva Estuary (Northeastern Baltic Sea)

Golubkov

Голубков

2021

Front. Mar. Sci.

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Teleconnection patterns can be an important tool for investigating the impact of climate change on biological communities. The aim of the study was, using 2003–2020 data on chlorophyll a concentrations (CHL) and plankton primary production (PP) in midsummer, to determine which of the teleconnection patterns have most pronounced effects on phytoplankton productivity in the estuary located on the border between western and eastern Europe. CHL correlated significantly with the winter values of the North Atlantic Oscillation (NAOw) and Scandinavia (SCANDw) indices, as well as with the values of the annual Polar/Eurasian (POLy) and annual Arctic Oscillation (AOy) indices. PP was significantly correlated with the values of POLy. East Atlantic/Western Russia pattern showed no significant correlation with both phytoplankton indicators. Stepwise multiple linear regressions were performed to determine the most influential indices affecting CHL and PP in the Neva Estuary. POLy, SCANDw, and NAOw appeared to be the main predictors in CHL multiple regression model, while the values of POLy and the July NAO and SCAND values were the main predictors in the PP model. According to our research, the productivity of phytoplankton in the Neva Estuary, located in the most northeastern part of the Baltic Sea, showed a significant relationship with the POL, which determines weather conditions in the northeastern regions of Eurasia. Possible mechanisms of the influence of these teleconnection patterns on phytoplankton productivity are discussed. Using the obtained multi-regression equations and the values of climatic indices, we calculated the values of CHL and PP for 1951–2002 and compared them with the results of field observations. The calculated and measured values of CHL and PP showed a significant increase in phytoplankton productivity in the Neva Estuary in the second half of the 2010s compared to earlier periods. In some years of the 1950s, 1980s, and late 1990s, CHL could also be above average and the low phytoplankton productivity should have been observed in the 1960s–1970s. This indicates a significant contribution of current climate change to fluctuation in phytoplankton productivity observed in recent decades, which should be taken into account when developing measures to protect aquatic ecosystems from eutrophication.

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Impacts of anthropogenic activities on the Changjiang (Yangtze) estuarine ecosystem (1998–2012)

Chen

Dai

et al. 2015

Acta Oceanol. Sin.

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Estuarine ecosystem has greatly changed in the recent decades due to anthropogenic perturbations in the Changjiang Estuary. Change patterns and impact factors were analyzed based on the continuous data in relation to the Changjiang estuarine ecosystem from 1998 to 2012. The results showed significant decreases in plankton species and annual output of Coilia nasus, Coilia mystus. Furthermore, species and biomass of benthos showed abrupt change in 2003, downward before that and upward after that. It was noted that, Eriocheir sinensis, a high value commercial fish, had an annual production increase of 97%. Reduction of riverine nutrients, especially dissolved silicate (DSI) loads into the estuary could contribute to the decline in Bacillariophyta species. Dredging and dumping works of the North Passage led to the decreases in regional plankton species. However, the species reproduction and releasing projects could restore the estuarine ecosystem through increasing the output of E. sinensis, as well as species and biomass of benthos.

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Ecosystem changes in the Neva Estuary (Baltic Sea): Natural dynamics or response to anthropogenic impacts?

Cited by 28 publications

References 23 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)

Relationships Between Northern Hemisphere Teleconnection Patterns and Phytoplankton Productivity in the Neva Estuary (Northeastern Baltic Sea)

Impacts of anthropogenic activities on the Changjiang (Yangtze) estuarine ecosystem (1998–2012)

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