Distinct Community Assembly Processes of Abundant and Rare Soil Bacteria in Coastal Wetlands along an Inundation Gradient

Abstract

Coastal wetlands are one of the important ecosystems that play a crucial role in the regulation of climate change. Rare taxa (RT) exist in one habitat along with abundant taxa (AT).

Distinct Responses of Rare and Abundant Microbial Taxa to In Situ Chemical Stabilization of Cadmium-Contaminated Soil

“…4C ). Similar observations have been documented in agricultural fields ( 43 ) and coastal wetlands ( 31 ). The distinct assembly processes between rare and abundant bacterial communities could be due to discrepancies in response and niche breadth to environmental disturbances.…”

“…These unaffected rare taxa might be dormant or extremely slow growing but could be activated or become dominant when the environment is favorable ( 28 , 29 ). In addition, distinct assembly processes of abundant and rare communities have been found in many ecosystems, likely due to their differential responses to environmental changes ( 30 , 31 ). During in situ chemical stabilization process, applications of stabilizing amendments lead to multiple changes in soil properties, including metal speciation, soil pH, and available nutrients ( 32 ).…”

Morel Production Related to Soil Microbial Diversity and Evenness

“…Given that the entire period of morel fructification lasts only for about 1 month, the composition of microbiota in the soils is not expected to shift drastically. Like other studies with soil samples collected at a single time point ( 20 – 24 ), which are still able to provide valid information and conclusions in soil microbial ecology, our investigation covering 128 samples from 32 sites could provide insights into the ecophysiological factors either benefiting or obstructing morel fructification.…”

Soil phosphorus determines the distinct assembly strategies for abundant and rare bacterial communities during successional reforestation

“…This may be due to the difference in sampling time. In coastal wetland soils, rare species were more phylogenetically clustered and primarily governed by deterministic process, while abundant species were more over-dispersed and dominated by dispersal limitation (Gao et al, 2020). However, the opposite trends were observed in oil-contaminated soil (Jiao et al, 2017a).…”

“…A null model analysis was used to evaluate assembly processes of microbial community based phylogenetic and taxonomic βdiversity metrics (βNTI and Bray-Curtis-based Raup-Crick, RCbray) (Stegen et al, 2013), which could well quantify the contributions of each assembly process. Assembly mechanisms of the abundant and rare bacteria communities have been investigated in a wide range of habitats, including agricultural soil Hou et al, 2020), oilcontaminated soil (Jiao et al, 2017a), temperate deserts (Wang et al, 2021), coastal wetlands (Gao et al, 2020), marine (Wu et al, 2017;Mo et al, 2018), and inland freshwater (Liu et al, 2015) habitats. In agricultural soil, the deterministic process was the main assembly processes for both the abundant and rare sub-communities , but a contrasting result was found in another study in rice fields that communities of rare bacterial taxa were driven mainly by stochastic process (Hou et al, 2020).…”