EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
6/08/2017 | 2:15 PM - 2:30 PM | TRAIT-BASED DISTURBANCE ANALYSIS: DISPERSAL STRATEGIES AND STREAM COLONIZATION BY AQUATIC MACROINVERTEBRATES | 302B
TRAIT-BASED DISTURBANCE ANALYSIS: DISPERSAL STRATEGIES AND STREAM COLONIZATION BY AQUATIC MACROINVERTEBRATES
Lowland streams are highly dynamic water bodies that are exposed to a variety of environmental stressors. When conditions become unfavourable, aquatic macroinvertebrates disperse to other stretches of stream. The dispersal capacity of macroinvertebrates depends on possession and expression of specific traits. However, it remains unknown which key traits or combination of traits leads to successful dispersal and subsequent colonization of streams by macroinvertebrates. We hypothesize that species 1) do not necessarily use all of their potentially useful traits and 2) traits tend to act in combinations. These hypotheses were tested by monitoring three restored stretches of stream for two years. All dispersed species were identified and compared to the upstream source population to determine which trait combinations lead to successful dispersal and which traits have a negative impact on dispersal capacity. Results show that a combination of feeding strategy, larval locomotion type and number of life cycles per year determines if new habitat is reached and colonized. The outcome of this study will contribute to our knowledge of specific life-history strategies and can improve stream restoration efficiency.
- C29 Life Histories
- C15 Population Ecology
- S30 The future of trait-based approaches in research and management
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Presenters/Authors
Judith Westveer
(), University of Amsterdam, j.j.westveer@uva.nl;
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Piet F.M. Verdonschot
(), University of Amsterdam / Wageningen Environmental Research , piet.verdonschot@wur.nl;
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Harm Van der Geest
(), University of Amsterdam, H.G.vandergeest@uva.nl;
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