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Becker, Ralf (2011): Tab. 4: Vergesellschaftung von Nitella opaca in Nordwestdeutschland. 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):
11121314T (T) * Latitude: 53.522000 * Longitude: 7.481000 * Location: Tannhausen bei Aurich * Device: Water sample (WS)
123LW (LW) * Latitude: 53.584000 * Longitude: 7.722000 * Location: Lavay westlich Wittmund * Device: Water sample (WS)
45678LO (LO) * Latitude: 53.584000 * Longitude: 7.730000 * Location: Lavay östliches Gewässer * Device: Water sample (WS)
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):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2ORDINAL NUMBEROrd NoGeocode
3Optional event labelEvent 2
4Location of eventLocation
5AreaAream2Becker, Ralfanalyzed
6Depth, bathymetricBathy depthmBecker, Ralf
7pHpHBecker, Ralf
8ConductivityCondmS/cmBecker, Ralf
9DATE/TIMEDate/TimeGeocode
10CoverageCov%Becker, Ralf
11Number of speciesSpec No#Becker, Ralf
12Nitella opacaN. opaca%Becker, Ralf
13Nitella flexilisN. flexilis%Becker, Ralf
14Isolepis fluitansI. fluitans%Becker, Ralf
15Eleocharis palustrisE. palustris%Becker, Ralf
16Hydrocotyle vulgarisHyd.v%Becker, Ralf
17Ranunculus flammulaR. flammula%Becker, Ralf
18Callitriche hamulataC. hamulata%Becker, Ralf
19Elodea nultalliiE. nultallii%Becker, Ralf
20Littorella unifloraL. uniflora%Becker, Ralf
21Potamogeton crispusP. crispus%Becker, Ralf
22Potamogeton natansP. natans%Becker, Ralf
23Pilularia globuliferaP. globulifera%Becker, Ralf
Size:
130 data points

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