Abstract:
:Spatial distribution in the two collembolan species Tomocerus minor and Orchesella cincta is greatly influenced by the distribution of the environmental factors water and food. T. minor is totally restricted in distribution to water-saturated places, where it forms spaced-out aggregations. O. cincta assembles in water-saturated places during ecdysis and subsequent reproduction. This leads to dense contact-aggregations. 'Dispersal' follows during the feeding period, probably caused by food shortage, presence of other species and/or saturated conditions in the aggregation site. After feeding, orientation toward water-saturated places occurs by means of orthokinetic reactions and the aggregations are reestablished. The effect of this 'periodical aggregation" for the population is discussed.
journal_name
Oecologiajournal_title
Oecologiaauthors
Verhoef HA,Nagelkerke CJdoi
10.1007/BF00346922subject
Has Abstractpub_date
1977-01-01 00:00:00pages
215-226issue
2eissn
0029-8549issn
1432-1939pii
10.1007/BF00346922journal_volume
31pub_type
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