Not logged in
Data Publisher for Earth & Environmental Science

Meijering, Meertinus P D (1979): Tab. 1: Geographical, temperature and chemical features of sites on Bear Island and Spitsbergen [dataset]. PANGAEA,, Supplement to: Meijering, MPD (1979): Life cycle, ecology, and timing of Macrothrix hirsuticornis Norman & Brady (Cladocera, Crustacea) in Svalbard. Polarforschung, 49(2), 157-171, hdl:10013/epic.29480.d001

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX Citation

In arctic populations of Macrothrix hirsuticornis life cycles are mainly governed by temperature. This was found by using laboratory cultures in combination with the analysis of population samples from waters in Svalbard. In arctic waters ex-ephippio-++ usually produce gamogenetic F1-++ together with a high percentage of oo, which have to fertilize the resting eggs. Temperatures around 14°C, which are very rare in waters of Svalbard, will induce parthenogenetic oo in the F1 and even the F2-generation, a mode of reproduction normally found in Macrothrix-populations of Central Europe. This was found in laboratory cultures of M. hirsuticornis from Bear Island, and there was evidence, that a similar cycle occurs in warm wells in Spitsbergen. The arctic distribution of M. hirsuticornis mainly depends on temperature, which regulates the speed of individual development. But this can only be understood together with the length of time, during which suitable life conditions are given. Physiological adaptations to life in waters in high latitudes could not be found, in spite of the extreme northern occurrence of M. hirsuticornis.
Median Latitude: 75.831429 * Median Longitude: 17.217143 * South-bound Latitude: 74.450000 * West-bound Longitude: 11.880000 * North-bound Latitude: 79.470000 * East-bound Longitude: 19.250000
Minimum DEPTH, water: m * Maximum DEPTH, water: m
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
3Area/localityAreaMeijering, Meertinus P D
4DEPTH, waterDepth watermGeocode
5Temperature, waterTemp°CMeijering, Meertinus P Dfrom
6Temperature, waterTemp°CMeijering, Meertinus P Dto
7pHpHMeijering, Meertinus P D
8Conductivity, electrolyticECµS/cmMeijering, Meertinus P Dunit given: µmho
9Chloride anionCl-meq/lMeijering, Meertinus P D
10Alkalinity, totalATmmol(eq)/lMeijering, Meertinus P D
48 data points

Download Data

Download dataset as tab-delimited text — use the following character encoding:

View dataset as HTML