Najas marina subsp. marina

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Data

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Distribution

Continentality: 7

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Continentality

Continentality degree is derived from the position of species distribution range on the gradient from oceanic Western Europe to continental Middle Asia. The concept and data were taken from Berg et al. (2017), who revised and corrected a previous system of indicator values for continentality developed by Ellenberg et al. (1991). Higher values on the ordinal scale from 1 to 9 indicate species distributed in more continental areas. The species that extend over more than four regions assigned to different continentality classes as defined by Jäger (1968) are considered to be indifferent unless their lower continentality border is located in the regions assigned to continentality class 2 or higher.

Data source and citation

Berg C., Welk E. & Jäger E. J. (2017). Revising Ellenberg’s indicator values for continentality based on global vascular plant species distribution. Applied Vegetation Science, 20(3), 482–493. https://doi.org/10.1111/avsc.12306

Further references

Ellenberg H., Weber H. E., Düll R., Wirth V., Werner W. & Paulißen D. (1991). Zeigerwerte von Pflanzen in Mitteleuropa. Scripta Geobotanica, 18, 1–248.
Jäger E. J. (1968) Die pflanzengeographische Ozeanitätsgliederung der Holarktis und die Ozeanitätsbindung der Pflanzenareale. – Feddes Repertorium 79: 157–335.
Continentality amplitude: 8

?

Continentality amplitude

The concept and data were taken from Berg et al. (2017), who revised and corrected a previous system of indicator values for continentality developed by Ellenberg et al. (1991). Continentality degree is derived from the position of species distribution range on the gradient from oceanic Western Europe (class 1) to continental Middle Asia (class 10). Consequently, continentality amplitude corresponds to the number of phytogeographic continental classes where given species is distributed.

Data source and citation

Berg C., Welk E. & Jäger E. J. (2017). Revising Ellenberg’s indicator values for continentality based on global vascular plant species distribution. Applied Vegetation Science, 20(3), 482–493. https://doi.org/10.1111/avsc.12306

Further references

Ellenberg H., Weber H. E., Düll R., Wirth V., Werner W. & Paulißen D. (1991). Zeigerwerte von Pflanzen in Mitteleuropa. Scripta Geobotanica, 18, 1–248.
Jäger E. J. (1968) Die pflanzengeographische Ozeanitätsgliederung der Holarktis und die Ozeanitätsbindung der Pflanzenareale. – Feddes Repertorium 79: 157–335.
Country-based map: Euro+Med Plantbase

No subordinate taxa were found for this item.