Ctenophores Beroe cucumis and newly discovered Beroe pseudocucumis: global distribution and background abiotic conditions
Kazmin, A.S.; Shiganova, T.A.; Alekseenko, E.V.; Lüskow, F.; Abyzova, G.A. (2025). Ctenophores Beroe cucumis and newly discovered Beroe pseudocucumis: global distribution and background abiotic conditions. Mar. Environ. Res. 211: 107460. https://dx.doi.org/10.1016/j.marenvres.2025.107460
In: Marine Environmental Research. Applied Science Publishers: Barking. ISSN 0141-1136; e-ISSN 1879-0291, more
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| Keywords |
Climatology
Beroe cucumis Fabricius, 1780 [WoRMS]; Beroe pseudocucumis Shiganova & Abyzova, 2021 [WoRMS]
World Oceans [Marine Regions]
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| Author keywords |
Ctenophores; Global distribution; Occurrence ranges; Seasonal and interannual variability; World ocean |
| Authors | | Top |
- Kazmin, A.S.
- Shiganova, T.A., more
- Alekseenko, E.V.
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| Abstract |
Geographical aspects of the global distribution of ctenophores Beroe cucumis and newly discovered Beroe pseudocucumis in the World Ocean along with background abiotic environmental conditions and climatology, as well as seasonal and interannual variability of their habitat areas were studied. The considered species inhabit both hemispheres, predominantly in the coastal waters. Temperature and salinity ranges of species occurrence, defined from observations, were used to detect areas of favorable conditions based on climatological temperature and salinity on a global scale. These areas form zonally oriented continuous belts, adjacent to each other and separated by narrow intersection strips where conditions are favorable for both species. Zones of species habitat mostly correspond to climatic zonation of the World Ocean with some deviations in the regions affected by large-scale oceanic currents. In general, B. cucumis is confined to colder, less saline climatic zones, while B. pseudocucumis inhabits warmer, more saline waters. Besides the seasonal variations in favorable zones' area, during the summer season a virtual spatial shift of those zones to the north occurs, synchronous in both hemispheres. Long-term trends indicate that the regions with favorable habitat conditions since 2010-12 slightly expanded for B. cucumis, while such regions for B. pseudocucumis diminished. Projections of expected changes in these regions by 2050 and 2099, associated with global warming, are considered. |
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