Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1111/j.1461-0248.2011.01654.x
Title (Primary) Linne's floral clock is slow without pollinators – flower closure and plant-pollinator interaction webs
Author Fründ, J.; Dormann, C.F.; Tscharntke, T.
Journal Ecology Letters
Year 2011
Department CLE
Volume 14
Issue 9
Page From 896
Page To 904
Language englisch
Keywords Capitulum closure; Cichorioideae; circadian; Crepis capillaris; flower opening; interaction networks; mutualism; pollination response; temporal specialisation; temporal turnover
Abstract

Temporal patterns of flower opening and closure within a day are known as Linne´!s floral clock. Time of flower
closure has been explained mainly by light in the traditional botanical literature. We show with a set of
experiments that Asteraceae flower heads can close within three hours after pollination, whereas un-pollinated
flower heads stay open until the late afternoon. This suggests that closing time strongly depends on pollinators.
Using plant-pollinator interaction webs we further demonstrate that the daily pattern of flower opening and the
rapid response to pollination can impose strong temporal dynamics on interspecific interactions within a single
day. We observed pollinator species turnover and changes in facilitation vs. competition among plants. Our
results show for the first time that pollination induces rapid flower closure on the community level. This causes
imprecision in Linne´!s floral clock with far-reaching consequences for plant-pollinator interactions.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=11430
Fründ, J., Dormann, C.F., Tscharntke, T. (2011):
Linne's floral clock is slow without pollinators – flower closure and plant-pollinator interaction webs
Ecol. Lett. 14 (9), 896 - 904