Is it better to be big and old or small and young to overcome drought? – a case study of Gammarus fossarum after-drought recolonization of intermittent streams

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F16%3A00090331" target="_blank" >RIV/00216224:14310/16:00090331 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Is it better to be big and old or small and young to overcome drought? – a case study of Gammarus fossarum after-drought recolonization of intermittent streams
Original language description
The ongoing climate change affects the flow regime especially of small brooks and is probably related to more frequent extreme droughts, which impact populations of aquatic organisms. An example of strongly affected species is amphipod Gammarus fossarum that inhabits majority of small streams in the Czech Republic. We compared Gammarus populations from 5 pairs of permanent and intermittent sites with similar abiotic characteristics, to find out how were the population structures impacted by previous drought. The populations of gammarids were sampled in autumn after two months of recolonization, and the length of the head (from the upper edge of the head to the base of second antenna) was measured using the image analysis and later recalculated to body length. Intermittent sites had (i) lower after-drought abundance, (ii) predominance of males over females and (iii) fewer juveniles than permanent streams.
Czech name
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Czech description
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Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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