Biogeography of the free-living and particle-attached bacteria in Tibetan lakes

Liu, Keshao; Hou, Juzhi; Liu, Yongqin; Hu, Anyi; Wang, Mingda; Wang, Feng; Chen, Yuying; Gu, Zhengquan

doi:10.1093/femsec/fiz088

Cited by 38 publications

(35 citation statements)

References 51 publications

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“…Liu et al. (2019) reported that the spatial distribution of the FLBC was explained mainly by environment filtering rather than dispersal limitation; an interpretation for the spatial distribution of FLBC that is inconsistent with our results. Free‐living bacteria are generally considered to be smaller in size and have a higher dispersal ability than the particle‐attached lifestyle.…”

Section: Discussioncontrasting

confidence: 99%

“…However, dispersal limitation dominated over the selection processes and therefore determined much of the spatial distribution patterns observed for FLBC and PABC in both regions. Liu et al (2019) reported that the spatial distribution of the FLBC was explained mainly by environment filtering rather than dispersal limitation; an interpretation for the spatial distribution of FLBC that is inconsistent with our results. Free-living bacteria are generally considered to be smaller in size and have a higher dispersal ability than the particle-attached lifestyle.…”

Section: Ecological Processes Shaping the Spatial Distribution Of Lakeshore Bacterial Communities Differed Between Flbc And Pabccontrasting

confidence: 99%

“…The lakeshore habitat is quite shallow and wave-limited relative to open-water areas, greatly limiting the dispersal of both FLBC and PABC. Moreover, unlike the Tibetan lakes studied in Liu et al (2019), which exhibited a salinity gradient ranging from 0.1 to 47.8 g/L, all lakes involved in our study were freshwater. Salinity can be a strong selective force (Wu et al, 2006), overwhelming the effects of dispersal limitation in shaping the assembly of the FLBC, as observed in Liu et al (2019).…”

Section: Ecological Processes Shaping the Spatial Distribution Of Lakeshore Bacterial Communities Differed Between Flbc And Pabcmentioning

confidence: 76%

“…Salinity can be a strong selective force (Wu et al., 2006), overwhelming the effects of dispersal limitation in shaping the assembly of the FLBC, as observed in Liu et al. (2019).…”

Section: Discussionmentioning

confidence: 99%

“…Free‐living bacteria are generally considered to be smaller in size and have a higher dispersal ability than the particle‐attached lifestyle. Therefore, the relative importance of dispersal limitation would be reduced (Liu et al., 2019). However, inland lentic water bodies, such as lakes and ponds, can be viewed as special examples of biological islands located within terrestrial ecosystems (Ripley & Simovich, 2009).…”

Section: Discussionmentioning

confidence: 99%

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Distinct microhabitats affect the relative balance of ecological processes shaping the spatial distribution of bacterial communities in lakeshore habitats

Zeng

et al. 2021

Freshwater Biology

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1. The lakeshore habitat, which is an interface zone between lake and land, harbours various organic particles providing nutrient-rich microhabitats for bacterial colonisation. Revealing the mechanisms maintaining the bacterial diversity generated on these particles is vital for understanding the biogeochemical processes within lakeshore habitats. To date, however, the bacterial communities within lakeshore habitats have been rarely explored, and knowledge of the ecological processes associated with their spatial distribution is limited.2. Here, we employed amplicon-based high throughput sequencing technology to investigate the composition, co-occurrence patterns, spatial distribution, and assembly processes of free-living and particle-attached bacterial communities (FLBC vs. PABC) across 29 lakeshore zones within freshwater lakes from two typical regions: Middle-Lower Yangtze River Plain and Yunnan-Kweichow Plateau.3. We found significant community dissimilarity between both bacterial lifestyles and regions. PABC exhibited higher community dissimilarity between the plain and plateau regions than FLBC did. Furthermore, eight operational taxonomic units were detected as a core bacterial community within the lakeshore habitats across the plain and plateau regions. Network analysis revealed that bacterial taxa preferring a particle-attached lifestyle exhibited more co-occurrence associations for both intra-and inter-community than the free-living lifestyle. Both FLBC and PABC showed significant distance-decay relationships in these two regions.Dispersal limitation was the most important process associated with patterns in the spatial distribution of FLBC and PABC, whereas the relative importance of variable and homogeneous selection differed between the assembly of FLBC and PABC because of differences in their microhabitats. 4. Our results highlight that dispersal limitation may be strongly associated with the spatial distribution of lakeshore bacterial communities at a regional scale.

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Section: Discussioncontrasting

confidence: 99%

Section: Ecological Processes Shaping the Spatial Distribution Of Lakeshore Bacterial Communities Differed Between Flbc And Pabccontrasting

confidence: 99%

Section: Ecological Processes Shaping the Spatial Distribution Of Lakeshore Bacterial Communities Differed Between Flbc And Pabcmentioning

confidence: 76%

“…Salinity can be a strong selective force (Wu et al., 2006), overwhelming the effects of dispersal limitation in shaping the assembly of the FLBC, as observed in Liu et al. (2019).…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Distinct microhabitats affect the relative balance of ecological processes shaping the spatial distribution of bacterial communities in lakeshore habitats

Zeng

et al. 2021

Freshwater Biology

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Stochastic processes shape the aggregation of free‐living and particle‐attached bacterial communities in the Yangtze River Estuary, China

Shi

Zuo

et al. 2022

J Basic Microbiol

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An estuary plays an important role in material and energy exchange between the land and sea, where complex physical, chemical, and biological processes occur. Here, we investigated the assembly processes of free‐living (FL) and particle‐associated (PA) bacterial communities in two seawater layers at five stations in the Yangtze River Estuary (YRE) by using 16S rRNA sequencing methods. The results indicated that Proteobacteria was the most abundant phylum in the YRE. The α‐diversity of PA community was significantly higher than FL community, and analysis of similarity showed significantly different (Global R = 0.2809, p < 0.005). RDA revealed that phosphate (PO43−) was significantly correlated with PA bacterial community abundance (p < 0.05). An ecological null model showed that both PA and FL bacterial communities were mainly influenced by stochastic processes (PA: 100%, FL: 70%), which PA attached to nutrient particles and are less affected by environmental filtration. Dispersal limitation (50%) was the main assembly process of the PA community, while homogeneous selection (30%) and drift (30%) were important processes in the FL community assembly. The available substrate for colonization limits the transformation from FL to PA bacteria. This study would improve our understanding of FL and PA bacterial community structure and factors affecting assembly process in estuarine environments.

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Salinity as a key factor affecting viral activity and life strategies in alpine lakes

Zang,

Liu,

Jiao

et al. 2024

Limnology & Oceanography

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Viruses are major players in the biosphere, yet little is known about their dynamics and life strategies in alpine lakes, particularly those on the Tibetan Plateau. We investigated microbial abundance, viral dynamics, and viral life strategies in 10 high‐altitude Tibetan lakes and found that they harbor high levels of active viruses. Salinity was identified as a crucial factor influencing viral abundance, dynamics, as well as viral life strategies. Lytic and lysogenic viral productions in moderate‐ and high‐salinity lakes were significantly higher than those in freshwater lakes. A trade‐off between viral life strategies resulted in a switch from lysis to lysogeny in high‐salinity lakes. Virus‐mediated cell lysis and virus decay in sampled Tibetan lakes could release about 162.72 and 2.84 μg C L−1 d−1, respectively. These findings revealed the crucial role of viruses in the carbon cycle of Tibetan lakes, and a switch in viral life strategies may impact their contribution to the carbon cycle. The potential impact of salinity changes triggered by climate change on the carbon cycle in alpine lakes worldwide is highlighted.

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Biogeography of the free-living and particle-attached bacteria in Tibetan lakes

Cited by 38 publications

References 51 publications

Distinct microhabitats affect the relative balance of ecological processes shaping the spatial distribution of bacterial communities in lakeshore habitats

Distinct microhabitats affect the relative balance of ecological processes shaping the spatial distribution of bacterial communities in lakeshore habitats

Stochastic processes shape the aggregation of free‐living and particle‐attached bacterial communities in the Yangtze River Estuary, China

Salinity as a key factor affecting viral activity and life strategies in alpine lakes

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