NDLI: Historical frequency of wind dispersal events and role of topography in the dispersal of anostracan cysts in a semi-arid environment

Content Provider	Springer Nature Link
Author	Parekh, Priya A. Paetkau, Mark J. Gosselin, Louis A.
Copyright Year	2014
Abstract	Propagules of several freshwater invertebrates are passively dispersed by wind, but the importance of wind as a dispersal vector remains poorly understood. We examined the historical frequency of wind dispersal events in cysts of Artemia franciscana. A threshold wind speed of ~5 km/h was required to begin dispersing surface-resting cysts, beyond which cyst dispersal increased rapidly with increasing wind speed. The analysis of wind speed and cyst dispersal data from our field experiment and wind data for the last 45 years from a nearby airport revealed that wind events strong enough to disperse most cysts at a wind-exposed site are common, occurring on ~16 snow-free days per year and occurring consistently over long time periods. In a topographically uneven landscape, however, wind speeds vary substantially from one location to another; wind speeds at our exposed site were 69% higher than in a nearby wind-sheltered depression. Accordingly, winds strong enough to disperse most cysts from this sheltered site occurred on only 5 days of the 45 year period. Cysts are thus less likely to disperse from, and more likely to settle in, sheltered depressions than wind-exposed areas. Sheltered areas could thus function as traps for wind-dispersing propagules.
Starting Page	51
Ending Page	59
Page Count	9
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	740
Issue Number	1
e-ISSN	15735117
Language	English
Publisher	Springer International Publishing
Publisher Date	2014-06-19
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Zooplankton Aquatic invertebrates Dormant propagules Migration Wind speed Pond communities Freshwater & Marine Ecology Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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