Effect of salinity on the distribution of Ponto-Caspian gammarids in a non-native area - environmental and experimental study

Aldona Dobrzycka-Krahel , Bożena Graca

Abstract

The native area of gammarids from the so-called ‘Caspian complex’, Pontogammarus robustoides (G.O. Sars, 1894), Obesogammarus crassus (G.O. Sars, 1894), Dikerogammarus haemobaphes (Eichwald, 1841) and D. villosus (Sowinsky, 1894), is associated with brackish waters. Over the last several decades they have colonized the European inland waters and part of the brackish Baltic Sea. It is believed that anthropogenic increase in the salinity of inland waters facilitated their expansion. However, the influence of salinity on the dispersal of gammarid species outside their native area is not fully understood. We tested the hypothesis that salinity was a major factor in determining distribution, based on the abundance of Gammaridae in three coastal areas of low salinity (brackish Baltic), i.e. 0.3, 3.4 and 7.3 PSU, successfully inhabited by them. Additionally, for the first time, the effect of water salinity on the osmoregulatory capacity of O. crassus was examined under laboratory conditions, for the salinities given above. The experiments showed that similarly as in the case of other Caspian complex species, salinity values of about 7 PSU create better conditions for osmoregulation in O. crassus than lower salinities (i.e. 0.3 and 3.4 PSU). In the environmental part of the study, we observed that only D. villosus achieved a significantly higher abundance in the area of 7.3 PSU. Thus, we concluded that in the range of 0.3–7.3 PSU, salinity is not a key factor governing the distribution of Ponto-Caspian gammarids.
Author Aldona Dobrzycka-Krahel (FOG / IO / DEEMO)
Aldona Dobrzycka-Krahel,,
- Division of Experimental Ecology of Marine Organisms
, Bożena Graca (FOG / IO / DMChEP)
Bożena Graca,,
- Division of Marine Chemistry and Environmental Protection
Journal seriesMarine Biology Research, ISSN 1745-1000, (A 25 pkt)
Issue year2018
Vol14
No2
Pages183-190
Publication size in sheets0.5
Keywords in Englishabundance, distribution pattern, gammarids, invasive species, ionic composition, osmoregulatory capacity
ASJC Classification1104 Aquatic Science; 1105 Ecology, Evolution, Behavior and Systematics; 1910 Oceanography
DOIDOI:10.1080/17451000.2017.1406666
URL https://doi.org/10.1080/17451000.2017.1406666
Languageen angielski
Score (nominal)25
Score sourcejournalList
ScoreMinisterial score = 25.0, 27-03-2020, ArticleFromJournal
Publication indicators WoS Citations = 4; Scopus Citations = 4; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.488; WoS Impact Factor: 2018 = 1.291 (2) - 2018=1.42 (5)
Citation count*4 (2020-03-15)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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