Distinct microbiotas of anatomical gut regions display idiosyncratic seasonal variation in an avian folivore

Drovetski, Sergei V.; O’Mahoney, Michael; Matterson, Kenan O.; Schmidt, Brian K.; Graves, Gary R.

doi:10.1186/s42523-019-0002-6

Cited by 29 publications

(28 citation statements)

References 67 publications

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“…Previous studies on wild birds have demonstrated low bacterial diversity and community composition differences in the midgut region (stomach and small intestine) compared to the crop microbiota. This suggests that the highly-acidic conditions in the midgut region acts as a barrier for environmental and foodborne bacteria [14,66,76,77]. This is further evident when we look at previously published mealworm gut microbiomes [78], where only a small fraction of the microbiome consists of bacterial genera that we identi ed in the gut microbiomes of mealworm-fed P. major.…”

Section: P Major Gut Microbiomes Respond To Diet Changes But Not Asmentioning

confidence: 73%

Flexibility and resilience of Great tit (Parus major) gut microbiomes to changing diets

Bodawatta

Freiberga

Puzejova

et al. 2020

Preprint

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Background: Gut microbial communities play important roles in nutrient management and can change in response to host diets. The extent of this flexibility and the concomitant resilience is largely unknown in wild animals. To begin untangling the dynamics of avian-gut microbiome symbiosis associated with diet changes, we exposed Parus major (Great tits) fed with a standard diet (seeds and mealworms) to either a mixed (seeds, mealworms and fruits), a seed, or a mealworm diet for four weeks, and examined the flexibility of gut microbiomes to these compositionally different diets. To assess microbiome resilience (recovery potential), all individuals were subsequently reversed to a standard diet for another four weeks. Cloacal microbiomes were collected weekly and characterised through sequencing the v4 region of the 16S rRNA gene using Illumina MiSeq. Results: Initial microbiomes changed significantly with the diet manipulation but the communities did not differ significantly between the three diet groups (mixed, seed and mealworm), despite multiple diet-specific changes of specific bacterial genera. Reverting birds to the standard diet led to only a partial recovery in gut community compositions. The majority of the bacterial taxa that increased significantly during diet manipulation decreased in relative abundances after reversion to the standard diet; however, bacterial taxa that decreased during the manipulation rarely increased after diet reversal.Conclusions: The gut microbial response and partial resilience to dietary changes support that gut bacterial communities of P. major play a role in accommodating dietary changes experienced by wild avian hosts. This may be a contributing factor to the relaxed association between microbiome composition and bird phylogeny. Our findings further imply that interpretations of wild bird gut microbiome analyses from single-time point sampling, especially for omnivorous species or species that have changing seasonal diets, should be done with caution. The partial community recovery implies that ecologically relevant diet changes (e.g., seasonality and migration) open up gut niches that may be filled by previously abundant microbes or replaced by different symbiont lineages, which has important implications for the integrity and specificity of long-term avian-symbiont associations.

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Section: P Major Gut Microbiomes Respond To Diet Changes But Not Asmentioning

confidence: 73%

Flexibility and resilience of Great tit (Parus major) gut microbiomes to changing diets

Bodawatta

Freiberga

Puzejova

et al. 2020

Preprint

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“…Sharon A. Huws I am proud to announce the official launch of Animal Microbiome. We launch today with 'Distinct microbiotas of anatomical gut regions display idiosyncratic seasonal variation in an avian folivore [1]' and have many articles accepted and ready for publication in due course.…”

Section: Welcome To Animal Microbiomementioning

confidence: 99%

Welcome to Animal Microbiome

Huws

2019

anim microbiome

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“…Gut bacterial taxa play an important role in organismal health, including regulating digestion [1], nutrient uptake [2], fat metabolism [3], and vitamin synthesis [4]. A range of factors influence gut bacterial community composition and diversity, including diet [5], environment [6,7], and seasons [8]. However, the unique life cycle of birds, especially migratory birds, makes it interesting to study their gut bacterial community [9].…”

Section: Introductionmentioning

confidence: 99%

Significant Differences in the Gut Bacterial Communities of Hooded Crane (Grus monacha) in Different Seasons at a Stopover Site on the Flyway

Zhang

Xiang

Dong

et al. 2020

Animals

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Intestinal bacterial communities form an integral component of the organism. Many factors influence gut bacterial community composition and diversity, including diet, environment and seasonality. During seasonal migration, birds use many habitats and food resources, which may influence their intestinal bacterial community structure. Hooded crane (Grus monacha) is a migrant waterbird that traverses long distances and occupies varied habitats. In this study, we investigated the diversity and differences in intestinal bacterial communities of hooded cranes over the migratory seasons. Fecal samples from hooded cranes were collected at a stopover site in two seasons (spring and fall) in Lindian, China, and at a wintering ground in Shengjin Lake, China. We analyzed bacterial communities from the fecal samples using high throughput sequencing (Illumina Mi-seq). Firmicutes, Proteobacteria, Tenericutes, Cyanobacteria, and Actinobacteria were the dominant phyla across all samples. The intestinal bacterial alpha-diversity of hooded cranes in winter was significantly higher than in fall and spring. The bacterial community composition significantly differed across the three seasons (ANOSIM, P = 0.001), suggesting that seasonal fluctuations may regulate the gut bacterial community composition of migratory birds. This study provides baseline information on the seasonal dynamics of intestinal bacterial community structure in migratory hooded cranes.

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Distinct microbiotas of anatomical gut regions display idiosyncratic seasonal variation in an avian folivore

Cited by 29 publications

References 67 publications

Flexibility and resilience of Great tit (Parus major) gut microbiomes to changing diets

Flexibility and resilience of Great tit (Parus major) gut microbiomes to changing diets

Welcome to Animal Microbiome

Significant Differences in the Gut Bacterial Communities of Hooded Crane (Grus monacha) in Different Seasons at a Stopover Site on the Flyway

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