Climate warming reduces gut microbiota diversity in a vertebrate ectotherm

Bestion, Elvire; Jacob, Staffan; Zinger, Lucie; Gesu, Lucie Di; Richard, Murielle; White, Joël; Côté, Julien

doi:10.1038/s41559-017-0161

Cited by 152 publications

(185 citation statements)

References 28 publications

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“…; Bestion et al . ), it should be non‐random relative to thermal performance traits (Thomas et al . ) and the marked negative impact on production could be buffered to some degree, because the species with lower thermal tolerance that contribute least to production in the new environment (i.e.…”

Section: Discussionmentioning

confidence: 99%

“…Indeed, major changes in food web structure due to overharvesting and changes in top-down control are known to be a key driver of biodiversity loss in marine ecosystems (Pauly et al 1998) and are likely to be largely independent of thermal performance traits. However, if biodiversity loss is directly linked to climate warming (Thomas et al 2004;Bestion et al 2017), it should be non-random relative to thermal performance traits (Thomas et al 2012) and the marked negative impact on production could be buffered to some degree, because the species with lower thermal tolerance that contribute least to production in the new environment (i.e. those with lower species coefficients, see Fig.…”

Section: Discussionmentioning

confidence: 99%

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Abrupt declines in marine phytoplankton production driven by warming and biodiversity loss in a microcosm experiment

et al. 2020

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Rising sea surface temperatures are expected to lead to the loss of phytoplankton biodiversity. However, we currently understand very little about the interactions between warming, loss of phytoplankton diversity and its impact on the oceans' primary production. We experimentally manipulated the species richness of marine phytoplankton communities under a range of warming scenarios, and found that ecosystem production declined more abruptly with species loss in communities exposed to higher temperatures. Species contributing positively to ecosystem production in the warmed treatments were those that had the highest optimal temperatures for photosynthesis, implying that the synergistic impacts of warming and biodiversity loss on ecosystem functioning were mediated by thermal trait variability. As species were lost from the communities, the probability of taxa remaining that could tolerate warming diminished, resulting in abrupt declines in ecosystem production. Our results highlight the potential for synergistic effects of warming and biodiversity loss on marine primary production.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Abrupt declines in marine phytoplankton production driven by warming and biodiversity loss in a microcosm experiment

et al. 2020

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“…Contrasts between populations in uropygial gland chemicals might thus be one way in which hosts deal with different microbial environments. Although our work was limited to two populations, this result points out the potential importance of breeding habitat characteristics in shaping the microbiota and host–microbiota interactions (Lucas & Heeb, ; Ruiz‐Rodriguez, Lucas, Heeb, & Soler, ), and urges the need for experimental approaches to shed light on how hosts and their microbiota will respond to environmental changes (Bestion et al., ; Jacob et al., ).…”

Section: Discussionmentioning

confidence: 95%

“…Furthermore, the relationship between increased investment in specific chemical modules and lower body feather bacterial richness compared to the nest was stronger in the population where bacterial richness was the highest. Empirical studies have provided evidence for variability of microbiota composition along environmental gradients, such as for instance along temperature, altitude, vegetation diversity and cover (Delgado‐Baquerizo et al., ; Fierer, ; Thompson et al., ), and in response to climate warming (Bestion et al., ). When facing such differences in microbial exposure, hosts are expected to adjust their investment in antimicrobial defences, as experimentally demonstrated in this species (Jacob, Immer, et al., ).…”

Section: Discussionmentioning

confidence: 99%

“…However, the factors responsible for microbiota richness and composition on a host's body surfaces remain poorly understood (Schommer & Gallo, 2013), and still biased towards humans or laboratory animals. Given the relevance of the microbiota for the ecology and evolutionary biology of hosts (Bestion et al, 2017;Evans et al, 2017;Ezenwa et al, 2012;Jacob et al, 2015;Leclaire, Jacob, Greene, Dubay, & Drea, 2017;McFall-Ngai et al, 2013), our comprehension of the drivers of microbiota composition must extend to nonmodel wild organisms to improve our understanding of the occurrence and mechanisms underlying such processes.…”

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confidence: 99%

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Chemical regulation of body feather microbiota in a wild bird

et al. 2018

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The microbiota has a broad range of impacts on host physiology and behaviour, pointing out the need to improve our comprehension of the drivers of host-microbiota composition. Of particular interest is whether the microbiota is acquired passively, or whether and to what extent hosts themselves shape the acquisition and maintenance of their microbiota. In birds, the uropygial gland produces oily secretions used to coat feathers that have been suggested to act as an antimicrobial defence mechanism regulating body feather microbiota. However, our comprehension of this process is still limited. In this study, we for the first time coupled high-throughput sequencing of the microbiota of both body feathers and the direct environment (i.e., the nest) in great tits with chemical analyses of the composition of uropygial gland secretions to examine whether host chemicals have either specific effects on some bacteria or nonspecific broad-spectrum effects on the body feather microbiota. Using a network approach investigating the patterns of co-occurrence or co-exclusions between chemicals and bacteria within the body feather microbiota, we found no evidence for specific promicrobial or antimicrobial effects of uropygial gland chemicals. However, we found that one group of chemicals was negatively correlated to bacterial richness on body feathers, and a higher production of these chemicals was associated with a poorer body feather bacterial richness compared to the nest microbiota. Our study provides evidence that chemicals produced by the host might function as a nonspecific broad-spectrum antimicrobial defence mechanism limiting colonization and/or maintenance of bacteria on body feathers, providing new insight about the drivers of the host's microbiota composition in wild organisms.

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Extreme Temperatures Reduce Copepod Performance and Change the Relative Abundance of Internal Microbiota

Vu,

Pham,

Truong

et al. 2024

Ecology and Evolution

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Copepods are one of the most abundant invertebrate groups in the seas and oceans and are a significant food source for marine animals. Copepods are also particularly sensitive to elevated temperatures. However, it is relatively unknown how the internal microbiome influences copepod susceptibility to warming. We addressed this fundamental knowledge gap by assessing key life history traits (survival, development, and reproduction) and changes in the internal microbiome in the tropical calanoid copepod Acartia sp. in response to warming (26°C, 30°C, and 34°C). Copepod microbiomes were analyzed using high throughput DNA sequencing of V1–V9 of 16S rRNA hypervariable regions. Copepod performance was better at 30°C than at 26°C, as indicated by faster development, a higher growth rate, and fecundity. However, these parameters strongly decreased at 34°C. We recorded 1,262,987 amplicon sequence reads, corresponding to 392 total operational taxonomic units (OTUs) at 97% similarity. Warming did not affect OTU numbers and the biodiversity indices, but it substantially changed the relative abundance of three major phyla: Proteobacteria, Actinobacteria, and Bacteroidota. The thermophilic and opportunistic Proteobacteria and Bacteroidota increased under extreme temperatures (34°C) while Actinobacteria abundance was strongly reduced. Changes in the relative abundance of these bacteria might be related to reduced copepod growth, survival, and reproduction under extreme temperatures. Profiling the functional role of all internal bacterial groups in response to the temperature change will fundamentally advance our mechanistic understanding of the performance of tropical copepods and, more generally, marine invertebrates to a warming climate.

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Climate warming reduces gut microbiota diversity in a vertebrate ectotherm

Cited by 152 publications

References 28 publications

Abrupt declines in marine phytoplankton production driven by warming and biodiversity loss in a microcosm experiment

Abrupt declines in marine phytoplankton production driven by warming and biodiversity loss in a microcosm experiment

Chemical regulation of body feather microbiota in a wild bird

Extreme Temperatures Reduce Copepod Performance and Change the Relative Abundance of Internal Microbiota

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