Ecological genetics of sediment browsing behaviour in a planktonic crustacean

Arbore, Roberto; Andras, Jason P.; Routtu, Jarkko; Ebert, Dieter

doi:10.1111/jeb.12923

Cited by 5 publications

(7 citation statements)

References 51 publications

(89 reference statements)

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“…Browsing intensity, animal microbiota, and sediment bacteria. Consistently with a previous study (21), browsing behavior intensity varied among Daphnia clones ( Fig. 2).…”

Section: Resultssupporting

confidence: 92%

“…The animals were propagated from stock cultures maintained in the laboratory under standardized conditions and without any effort to modify their microbiota. The browsing behavior of these clones has been assessed before (21) and was shown to differ among genotypes.…”

Section: Methodsmentioning

confidence: 99%

“…The behavior assay was conducted over 2 days when the animals were 12 to 14 days old, with all replicates for the different clone-by-treatment combinations evenly distributed across time. The behavior assay was performed as described previously (21). Briefly, we measured the traces left by individual replicate animals on a smooth surface layer of sediment (loess) at the bottom of tall cylindrical glass jars (20 cm tall, 6.5 cm diameter) ( Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the physical contact with the sediments resulting from browsing might present both disease risks and benefits from increased contact with bacteria. Previous work found evidence of genetic variation for the levels of browsing activity in D. magna (21).…”

mentioning

confidence: 97%

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Environmental Sources of Bacteria and Genetic Variation in Behavior Influence Host-Associated Microbiota

Mushegian

Arbore

Walser

et al. 2019

Appl Environ Microbiol

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In many organisms, host-associated microbial communities are acquired horizontally after birth. This process is believed to be shaped by a combination of environmental and host genetic factors. We examined whether genetic variation in animal behavior could affect the composition of the animal's microbiota in different environments. The freshwater crustacean Daphnia magna is primarily planktonic but exhibits variation in the degree to which it browses in benthic sediments. We performed an experiment with clonal lines of D. magna showing different levels of sediment-browsing intensity exposed to either bacteria-rich or bacteria-poor sediment or whose access to sediments was prevented. We found that the bacterial composition of the environment and genotype-specific browsing intensity together influence the composition of the Daphnia-associated bacterial community. Exposure to more diverse bacteria did not lead to a more diverse microbiome, but greater abundances of environment-specific bacteria were found associated with host genotypes that exhibited greater browsing behavior. Our results indicate that, although there is a great deal of variation between individuals, behavior can mediate genotype-by-environment interaction effects on microbiome composition. IMPORTANCE An animal's behavior can affect its risk of infection, but it is not well understood how behavior affects microbiome composition. The aquatic crustacean Daphnia exhibits genetic variation in the extent to which it browses in the sediment at the bottoms of ponds. We show that this behavior affects the Daphnia microbiome, indicating that genetic variation among individuals may affect microbiome composition and the movement of bacteria in different environments.

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“…Browsing intensity, animal microbiota, and sediment bacteria. Consistently with a previous study (21), browsing behavior intensity varied among Daphnia clones ( Fig. 2).…”

Section: Resultssupporting

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 97%

See 2 more Smart Citations

Environmental Sources of Bacteria and Genetic Variation in Behavior Influence Host-Associated Microbiota

Mushegian

Arbore

Walser

et al. 2019

Appl Environ Microbiol

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show abstract

“…Previous work found evidence of genetic variation for the levels of browsing activity 101 in D. magna (Arbore et. al.…”

Section: Introduction 36mentioning

confidence: 98%

Environmental sources of bacteria and genetic variation in behavior influence host-associated microbiota

Mushegian

Arbore

Walser

et al. 2018

Preprint

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In many organisms, host-associated microbial communities are acquired horizontally after birth. This process is believed to be shaped by a combination of environmental and host genetic factors. We examined whether genetic variation in animal behavior could affect the composition of the animal’s microbiota in different environments. The freshwater crustacean Daphnia magna is primarily planktonic, but exhibits variation in the degree to which it browses in benthic sediments. We performed an experiment with clonal lines of D. magna showing different levels of sediment-browsing intensity exposed to either bacteria-rich or bacteria-poor sediment or whose access to sediments was prevented. We find that the bacterial composition of the environment and genotype-specific browsing intensity together influence the diversity and composition of the Daphnia-associated bacterial community. Exposure to more diverse bacteria did not lead to a more diverse microbiome, but greater abundances of environment-specific bacteria were found associated with host genotypes that exhibited greater browsing behavior. Our results indicate that individual behavior can mediate genotype-by-environment interaction effects on microbiome composition.Summary statementGenetic differences in Daphnia behavior contribute to the amount of environmental bacteria present in their microbiome

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The role of temperature in the start of seasonal infectious disease epidemics

Tadiri,

Ebert

2023

Oikos

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Many infectious diseases display strong seasonal dynamics. When both hosts and parasites are influenced by seasonal variables, it is unclear if the start of an epidemic is limited by host or parasite factors or both. The Daphnia–Pasteuria host–parasite system exhibits seasonal epidemics. We aimed to ascertain how temperature contributes to the timing of P. ramosa epidemics in early spring. To this aim, we experimentally disentangled this effect from the effects of temperature on host development and phenology and from that of host traits on parasite time to visible infection. We hypothesized that the parasite is additionally directly limited by low temperatures beyond its need for available hosts. We found that parasite time to visible infection decreased with increasing temperature at a faster rate than host time to hatching and maturity did, consistent with this hypothesis. We also found that hosts hatched from sexual resting stages are less likely to become infected than those produced clonally, and that hosts resistant to many known parasite strains are slower to show signs of visible infection compared to those susceptible to many. Together, these results imply that climate change could lead to earlier seasonal epidemics for this host–parasite system, which may also impact longer‐term population dynamics.

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Ecological genetics of sediment browsing behaviour in a planktonic crustacean

Cited by 5 publications

References 51 publications

Environmental Sources of Bacteria and Genetic Variation in Behavior Influence Host-Associated Microbiota

Environmental Sources of Bacteria and Genetic Variation in Behavior Influence Host-Associated Microbiota

Environmental sources of bacteria and genetic variation in behavior influence host-associated microbiota

The role of temperature in the start of seasonal infectious disease epidemics

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