Becker, Ralf (2011): Tab. 4: Vergesellschaftung von Nitella opaca in Nordwestdeutschland [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.762482, Supplement to: Becker, R (2010): Bemerkenswerte Characeen-Funde in Nordwest-Deutschland. Abhandlungen des Naturwissenschaftlichen Vereins zu Bremen, 46(3), 409-418, hdl:10013/epic.37692.d001
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Abstract:
New facts on the occurrence and distribution of the threatened and rare stoneworts Chara baltica, C. connivens, C. contraria, C. virgata, Nitella hyalina, N. opaca, N. gracilis, N. capillaris, N translucens and N. flexilis and the non-threatened species Chara globularis in the northwestern part of Lower Saxony (Germany) are presented. A description of the stonewort sites is given and the abundance and the degrees of endangering of the species are discussed. Data about the Vegetation of the habitats of Nitella hyalina and N. opaca are reported. Additionally former sites of Chara canescens have been checked again. References to determination problems concerning Nitella opaca and N flexilis are given. Finally the protection of stoneworts, management requirements and the need for future investigations are discussed.
Coverage:
Median Latitude: 53.405000 * Median Longitude: 7.558250 * South-bound Latitude: 52.930000 * West-bound Longitude: 7.300000 * North-bound Latitude: 53.584000 * East-bound Longitude: 7.730000
Date/Time Start: 2009-05-01T00:00:00 * Date/Time End: 2009-05-15T00:00:00
Minimum ORDINAL NUMBER: 1 * Maximum ORDINAL NUMBER: 14
Event(s):
Comment:
außerdem in laufender Nr. 5: Juncus bulbosus: +; Nr. 8: Peplis portula: 1, Myosotis scorpioides: 2, Alisma plantago-aquatica: +; Nr. 13: Chara virgata: +, Potamogeton pectinatus: 1, P. berchtoldii: +
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | ORDINAL NUMBER | Ord No | Geocode | |||
| 3 | Optional event label | Event 2 | ||||
| 4 | Location of event | Location | ||||
| 5 | Area | Area | m2 | Becker, Ralf | analyzed | |
| 6 | Depth, bathymetric | Bathy depth | m | Becker, Ralf | ||
| 7 | pH | pH | Becker, Ralf | |||
| 8 | Conductivity | Cond | mS/cm | Becker, Ralf | ||
| 9 | DATE/TIME | Date/Time | Geocode | |||
| 10 | Coverage | Cov | % | Becker, Ralf | ||
| 11 | Number of species | Spec No | # | Becker, Ralf | ||
| 12 | Nitella opaca | N. opaca | % | Becker, Ralf | ||
| 13 | Nitella flexilis | N. flexilis | % | Becker, Ralf | ||
| 14 | Isolepis fluitans | I. fluitans | % | Becker, Ralf | ||
| 15 | Eleocharis palustris | E. palustris | % | Becker, Ralf | ||
| 16 | Hydrocotyle vulgaris | Hyd.v | % | Becker, Ralf | ||
| 17 | Ranunculus flammula | R. flammula | % | Becker, Ralf | ||
| 18 | Callitriche hamulata | C. hamulata | % | Becker, Ralf | ||
| 19 | Elodea nultallii | E. nultallii | % | Becker, Ralf | ||
| 20 | Littorella uniflora | L. uniflora | % | Becker, Ralf | ||
| 21 | Potamogeton crispus | P. crispus | % | Becker, Ralf | ||
| 22 | Potamogeton natans | P. natans | % | Becker, Ralf | ||
| 23 | Pilularia globulifera | P. globulifera | % | Becker, Ralf |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
130 data points