Microbial enzymatic responses to drought and to nitrogen addition in a southern California grassland

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Effects of past and current drought on the composition and diversity of soil microbial communities (2019, background): “Drought experiments have reported decreases in microbial biomass and activity (Hueso et al., 2012; Alster et al., 2013; Hartmann et al., 2017; Castaño et al., 2018), reductions in carbon and nitrogen mineralisation (Hueso et al.”
Life in Dry Soils: Effects of Drought on Soil Microbial Communities and Processes (2018, background): “However, enzyme activities do not show consistent responses to moisture (Alster et al. 2013, Sardans et al. 2008), perhaps because actual enzyme responses can result from changes in either the amount of enzyme present or the activity of individual enzyme molecules.”
Drought Stress and Root-Associated Bacterial Communities (2018, background): “By contrast, under drought soil bacterial activity tends to decrease as microbes die or enter dormancy (Jensen et al., 2003; Alster et al., 2013), although elevated gene abundance for complex carbon degradation has been observed (Bouskill et al., 2016b).”
Elemental stoichiometry of Fungi and Bacteria strains from grassland leaf litter (2014, background): “Litter microbial communities aredominatedbybacterial biomass, thoughFungi representup to ~20% of microbial biomass in summer (Alster et al., 2013).”