EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/26/2021 | 8:30 AM - 10:30 AM | SUCCESSFUL REINTRODUCTION OF TRICHOPTERA IN A RESTORED LOWLAND STREAM | Virtual Platform
SUCCESSFUL REINTRODUCTION OF TRICHOPTERA IN A RESTORED LOWLAND STREAM
Positive effects of stream restoration on macroinvertebrate communities can be limited as a result of isolation from source populations of the targeted organisms. This was demonstrated by carrying out an experimental reintroduction of the functionally important caddisfly Lepidostoma basale in a restored lowland stream in the Netherlands. In spring 2014 2400 last instar larvae were released at a single site within a stream with suitable habitat requirements, but which had become increasingly isolated from potential source populations. Population development was monitored the subsequent years by surveying woody debris, the substrate preferred by the species, along the entire length of the stream. Also streams in adjacent watersheds were surveyed to determine if individuals dispersed in lateral direction. The observed number of individuals increased strongly over time. This indicates that isolation from source populations and not the post-restoration environmental conditions were limiting establishment. In such cases reintroduction can be considered as a management option.
- Biodiversity
- Stream
- Ecosystem functioning
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Presenters/Authors
Ralf C.M. Verdonschot
(), Wageningen Environmental Research, ralf.verdonschot@wur.nl;
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Piet F.M. Verdonschot
(), University of Amsterdam / Wageningen Environmental Research , piet.verdonschot@wur.nl;
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