Elevation rather than season determines the assembly and co-occurrence patterns of soil bacterial communities in forest ecosystems of Mount Gongga

Zhu, Bingjian; Li, Chaonan; Wang, Junming; Li, Jiabao; Li, Xiangzhen

doi:10.1007/s00253-020-10783-w

Cited by 34 publications

(24 citation statements)

References 78 publications

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“…First, only once time of samples collected between July and August was used for analyzing microbial communities in our study, which could only reflect the microbial dynamics during the maximum growing season. The variations of microbial taxonomic and functional communities across the seasonal scale should be further explored by multiple times of sampling in other seasons (Zhu et al, 2020). Second, the soil C release used to explore the linkage with microbial communities was based on laboratory incubation.…”

Section: Discussionmentioning

confidence: 99%

Altered microbial structure and function after thermokarst formation

Liu

Kou

Chen

et al. 2020

Global Change Biology

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Permafrost thaw could induce substantial carbon (C) emissions to the atmosphere, and thus trigger a positive feedback to climate warming. As the engine of biogeochemical cycling, soil microorganisms exert a critical role in mediating the direction and strength of permafrost C‐climate feedback. However, our understanding about the impacts of thermokarst (abrupt permafrost thaw) on microbial structure and function remains limited. Here we employed metagenomic sequencing to analyze changes in topsoil (0–15 cm) microbial communities and functional genes along a permafrost thaw sequence (1, 10, and 16 years since permafrost collapse) on the Tibetan Plateau. By combining laboratory incubation and a two‐pool model, we then explored changes in soil labile and stable C decomposition along the thaw sequence. Our results showed that topsoil microbial α‐diversity decreased, while the community structure and functional gene abundance did not exhibit any significant change at the early stage of collapse (1 year since collapse) relative to non‐collapsed control. However, as the time since the collapse increased, both the topsoil microbial community structure and functional genes differed from the control. Abundances of functional genes involved in labile C degradation decreased while those for stable C degradation increased at the late stage of collapse (16 years since collapse), largely driven by changes in substrate properties along the thaw sequence. Accordingly, faster stable C decomposition occurred at the late stage of collapse compared to the control, which was associated with the increase in relative abundance of functional genes for stable C degradation. These results suggest that upland thermokarst alters microbial structure and function, particularly enhances soil stable C decomposition by modulating microbial functional genes, which could reinforce a warmer climate over the decadal timescale.

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Section: Discussionmentioning

confidence: 99%

Altered microbial structure and function after thermokarst formation

Liu

Kou

Chen

et al. 2020

Global Change Biology

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“…However, bacterial community richness, diversity and composition varied significantly between habitats as described from other alpine habitats from Tibetan Plateau and mountains in China and European Alps [22,68,69] The habitat-specific patterns of bacterial community suggest that other factors than elevation might play crucial role in shaping their community [60]. Elevation provides comprehensive changes in habitat types where various biotic and abiotic factors influence bacterial diversity and composition [69]. For example, we found an unexpected result of highest bacterial richness and diversity in AM (higher elevation) when compared to SF and AS (lower elevation habitats).…”

Section: Discussionmentioning

confidence: 94%

“…Unlike plant [63][64][65], animal and birds [66,67] bacterial communities are known to exhibit inconsistent relationship with elevation. However, bacterial community richness, diversity and composition varied significantly between habitats as described from other alpine habitats from Tibetan Plateau and mountains in China and European Alps [22,68,69] The habitat-specific patterns of bacterial community suggest that other factors than elevation might play crucial role in shaping their community [60]. Elevation provides comprehensive changes in habitat types where various biotic and abiotic factors influence bacterial diversity and composition [69].…”

Section: Discussionmentioning

confidence: 99%

“…Unlike plant [63–65], animal and birds [66, 67] bacterial communities are known to exhibit inconsistent relationship with elevation. However, bacterial community richness, diversity and composition varied significantly between habitats as described from other alpine habitats from Tibetan Plateau and mountains in China and European Alps [22, 68, 69]…”

Section: Discussionmentioning

confidence: 99%

“…Earlier studies have suggested that temperature causes variations in soil bacterial community in natural environments by regulating their growth and metabolism [77], and a range of climatic factors (mean annual temperature, mean annual daily max temperature, mean annual precipitation, monthly mean air temperature, monthly mean precipitation etc.) are good predictors of variations in soil bacterial taxonomic diversity and composition [61, 69, 78]. Such effects of temperature can also be explained by species/group specific life strategies.…”

Section: Discussionmentioning

confidence: 99%

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Soil bacterial community diversity and composition vary more with elevation than seasons in alpine habitats of western Himalaya

Bhattacharya

Mondol

Talukdar

et al. 2020

Preprint

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Soil heterotrophic respiration-driven CO2 emissions, its impact on global warming and the mechanistic roles of soil bacterial communities in this process have been an area of active research. However, our knowledge regarding the effects of environmental changes on soil bacterial communities is limited. To this end, the climate-sensitive high-altitude alpine ecosystems offer ideal opportunities to investigate relationship between climate change and bacterial communities. While data from several high-altitude mountain regions suggest that local environment factors and geological patterns govern bacterial communities, no information is available from the Himalaya. Here we provide baseline information on seasonal soil bacterial community diversity and composition along a 3200-4000 m elevation gradient covering four alpine habitats (subalpine forest, alpine scrub, alpine meadow and moraine) in Gangotri National Park, western Himalaya. Bacterial metabarcoding data from 36 field-collected samples showed no elevation trend in the bacterial richness and a non-monotonous decrease in their diversity. Further, their community diversity and composition varied significantly among habitats along elevation but were stable seasonally within each habitat. The richness was primarily influenced by soil inorganic carbon (SOC) and total nitrogen (TN), whereas temperature, SOC and TN affected diversity and composition patterns. Given the importance of the Himalaya in the context of global carbon cycle this information will help in accurate modeling of climate adaptation scenarios of bacterial niches and their downstream impacts towards climate warming.

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Elevational patterns of microbial species richness and evenness across climatic zones and taxonomic scales

Huang,

Su,

Lin

et al. 2023

Ecology and Evolution

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Understanding the elevational patterns of soil microbial diversity is crucial for microbial biogeography, yet the elevational patterns of diversity across different climatic zones, trophic levels, and taxonomic levels remain unclear. In this study, we investigated the elevational patterns of species richness, species evenness and the relationship between species richness and evenness (RRE) in the forest soil bacterial and fungal communities and individual phyla across three climatic zones (tropical, subtropical, and cold temperate). Our results revealed that soil bacterial richness (alpha diversity) decreased with elevation, while fungal richness exhibited a hump‐shaped pattern in the tropical and cold‐temperate forests. Elevational patterns of evenness in bacterial and fungal communities showed the hump‐shaped pattern across climatic zones, except for bacterial evenness in the tropical forest. Both bacterial and fungal richness and evenness were positively correlated in the subtropical and cold‐temperate forests, while negatively correlated for bacteria in the tropical forest. The richness and evenness of soil microorganisms across different regions were controlled by climatic and edaphic factors. Soil pH was the most important factor associated with the variations in bacterial richness and evenness, while mean annual temperature explained the major variations in fungal richness. Our results addressed that the varieties of elevational patterns of microbial diversity in climatic zones and taxonomic levels, further indicating that richness and evenness may respond differently to environmental gradients.

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Elevation rather than season determines the assembly and co-occurrence patterns of soil bacterial communities in forest ecosystems of Mount Gongga

Cited by 34 publications

References 78 publications

Altered microbial structure and function after thermokarst formation

Altered microbial structure and function after thermokarst formation

Soil bacterial community diversity and composition vary more with elevation than seasons in alpine habitats of western Himalaya

Elevational patterns of microbial species richness and evenness across climatic zones and taxonomic scales

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