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The impact of increased temperature on life history traits, dynamics of populations and community structure of Daphnia spp

Marcin Krzysztof Dziuba

Abstract

My PhD thesis focuses on the impact of temperature increase on body size and reproduction of Daphnia, as well as dynamics of their populations and structure of communities. I investigated communities of Daphnia longispina complex, inhabiting lakes heated by power plants, and I showed that Daphnia can adapt to elevated temperature by increase of constitutive body size and plastic change of size. Large body size maximizes their reproduction during mild winters, while plastic size reduction allows maintaining efficient reproduction under thermal extremes. Temperature elevation also induced Daphnia community reconstruction, with appearance of characteristic to Southern Europe D. galeata and reduced abundance of North-European D. longispina. I also found that Daphnia from heated lakes were reproducing equally well in the presence filamentous cyanobacteria and without them, while filaments reduced reproduction of Daphnia from non-heated lakes. The results obtained during my PhD program indicate that D. galeata is capable of evolutionary adaptation to temperature increase and frequent cyanobacterial blooms, and that makes it superior in climate change conditions. Body size adjustments and efficient resources allocation seem to be key traits determining the success of D. galeata in coping with climate warming.
Record ID
UAM6dcd3c23b34f49bba829f00cc74b2d32
Diploma type
Doctor of Philosophy
Author
Marcin Krzysztof Dziuba Marcin Krzysztof Dziuba,, Undefined Affiliation
Title in Polish
Wpływ podwyższonej temperatury na cechy historii życia oraz na dynamikę populacji i strukturę zgrupowań Daphnia spp
Title in English
The impact of increased temperature on life history traits, dynamics of populations and community structure of Daphnia spp
Language
eng (en) English
Certifying Unit
Wydział Biologii [nowa struktura organizacyjna] (SNP/WB)
Scientific discipline (2.0)
6.4 biological sciences
Year of creation
2021
Start date
26-01-2018
Defense Date
12-04-2021
Title date
23-04-2021
Supervisor
URL
https://hdl.handle.net/10593/26229 Opening in a new tab
Keywords in English
adaptation; climate change; cryptic evolution; lakes
Abstract in English
My PhD thesis focuses on the impact of temperature increase on body size and reproduction of Daphnia, as well as dynamics of their populations and structure of communities. I investigated communities of Daphnia longispina complex, inhabiting lakes heated by power plants, and I showed that Daphnia can adapt to elevated temperature by increase of constitutive body size and plastic change of size. Large body size maximizes their reproduction during mild winters, while plastic size reduction allows maintaining efficient reproduction under thermal extremes. Temperature elevation also induced Daphnia community reconstruction, with appearance of characteristic to Southern Europe D. galeata and reduced abundance of North-European D. longispina. I also found that Daphnia from heated lakes were reproducing equally well in the presence filamentous cyanobacteria and without them, while filaments reduced reproduction of Daphnia from non-heated lakes. The results obtained during my PhD program indicate that D. galeata is capable of evolutionary adaptation to temperature increase and frequent cyanobacterial blooms, and that makes it superior in climate change conditions. Body size adjustments and efficient resources allocation seem to be key traits determining the success of D. galeata in coping with climate warming.

Uniform Resource Identifier
https://researchportal.amu.edu.pl/info/phd/UAM6dcd3c23b34f49bba829f00cc74b2d32/
URN
urn:amu-prod:UAM6dcd3c23b34f49bba829f00cc74b2d32

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