Influences of land reclamation on soil bacterial communities of abandoned salt pans in the Yellow River Delta

Zhu, Yihao; Song, Xiliang; Liu, Xiaoli; Chen, Weifeng; Niu, Xuchang; Zhou, Weizhi

doi:10.1002/ldr.4384

Cited by 4 publications

(1 citation statement)

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“…There may be no latitudinal gradient in key soil characteristics causing differences in diversity successional patterns. For example, it has been found that the main environmental factor affecting the bacterial community variation was soil SOC in tropics succession (Wang et al., 2020); the bacterial community was significantly influenced by changes in the concentration of TN in temperate succession (Zhu et al., 2022), and it also may be regulated by multiple factors, including TP, pH in another temperate study (Jangid et al., 2013). Thus, there is a need to further examine mechanisms driving α and β‐diversity during secondary succession to gain a comprehensive understanding of the causes of change.…”

Section: Discussionmentioning

confidence: 99%

Species pool, local assembly processes: Disentangling the mechanisms determining bacterial α‐ and β‐diversity during forest secondary succession

Zhang,

Dai,

Huang

et al. 2023

Molecular Ecology

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Across ecology, and particularly within microbial ecology, there is limited understanding how the generation and maintenance of diversity. Although recent work has shown that both local assembly processes and species pools are important in structuring microbial communities, the relative contributions of these mechanisms remain an important question. Moreover, the roles of local assembly processes and species pools are drastically different when explicitly considering the potential for saturation or unsaturation, yet this issue is rarely addressed. Thus, we established a conceptual model that incorporated saturation theory into the microbiological domain to advance the understanding of mechanisms controlling soil bacterial diversity during forest secondary succession. Conceptual model hypotheses were tested by coupling soil bacterial diversity, local assembly processes and species pools using six different forest successional chronosequences distributed across multiple climate zones. Consistent with the unsaturated case proposed in our conceptual framework, we found that species pool consistently affected α‐diversity, even while local assembly processes on local richness operate. In contrast, the effects of species pool on β‐diversity disappeared once local assembly processes were taken into account, and changes in environmental conditions during secondary succession led to shifts in β‐diversity through mediation of the strength of heterogeneous selection. Overall, this study represents one of the first to demonstrate that most local bacterial communities might be unsaturated, where the effect of species pool on α‐diversity is robust to the consideration of multiple environmental influences, but β‐diversity is constrained by environmental selection.

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Section: Discussionmentioning

confidence: 99%