Multiple dimensions of bacterial diversity unrelated to functioning, stability and multifunctionality

Roger, Fabian; Bertilsson, Stefan; Langenheder, Silke; Ahmed, Omneya; Gamfeldt, Lars

doi:10.7287/peerj.preprints.1688v1

Cited by 2 publications

(2 citation statements)

References 38 publications

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“…However, when bacterial diversity was analyzed simultaneously with habitat diversity the link between bacterial diversity and multifunctionality was less clear. This is in line with recent literature, showing that biogeochemistry can be the single most important driver for the functioning of bacterial dominated systems [31] and that changes in bacterial diversity often have little effect on ecosystem functioning [32] (but see Delgado-Baquerizo et al [33]). In autumn, however, the effect of habitat diversity on landscape multifunctionality was indirect and mediated through changes in bacterial diversity.…”

Section: Discussionsupporting

confidence: 89%

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Supplemental Information 5: Table S5: Linear Model of Multifunctionality ~ Algal Diversity × Season

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In this study, we demonstrate how changes in the diversity of habitat and bacterial communities affect landscape multifunctionality. Habitat diversity may beget species diversity by increasing niche availability and resource complementarity. Species diversity, in turn, generally promotes multifunctionality, i.e. the simultaneous performance of multiple ecosystem functions. However, the relationship between habitat diversity and functioning remains to be explicitly explored. In order to test the relationship between habitat diversity and multifunctionality we constructed experimental landscapes of four different habitats common in shallow-water sediment ecosystems: cyanobacterial mats, Ruppia maritima meadows, silty mud and sandy beach. We manipulated the diversity of these habitats over three consecutive seasons and measured bacterial diversity, benthic microalgal diversity and four functions related to marine nitrogen cycling (gross primary production, nitrogen fixation, denitrification and uptake of dissolved inorganic nitrogen). Our results showed that higher habitat and bacterial diversity, but not benthic microalgal diversity, increased landscape multifunctionality. However, the relative importance of habitat and bacterial diversity varied with season. Habitat diversity was generally the strongest driver, affecting multifunctionality directly in summer and indirectly via bacterial diversity in autumn. In spring, neither of the two aspects of diversity was important. Our study demonstrates the importance of considering temporal differences in both habitat and species diversity for landscape multifunctionality, and the importance of direct and indirect effects in mediating ecosystem functions. Habitat homogenization in concert with loss in biodiversity can thus be a driving force of declining ecosystem functioning and the services they underpin.

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Section: Discussionsupporting

confidence: 89%

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Supplemental Information 5: Table S5: Linear Model of Multifunctionality ~ Algal Diversity × Season

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“…Despite having a central role in the Earth’s biogeochemical cycles, microbial diversity studies have been neglected until the last decade 1 , 2 . The central issue regarding biodiversity and ecosystem functioning (BEF, abbreviation) involves how depletion and/or decline in species diversity affect essential ecosystem functioning processes 3 – 6 .…”

Section: Introductionmentioning

confidence: 99%

The depleted mineralization of the fungicide chlorothalonil derived from loss in soil microbial diversity

Souza

Andrade

Pereira

et al. 2017

Sci Rep

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There are lack of studies regarding the effects of microbial diversity on specific soil functions, such as pesticides degradation. This study evaluated the role of bacterial community diversity and biochar on chlorothalonil (CTN) degradation, using ‘dilution to extinction’ approach, PCR-DGGE/16S rRNA gene technique, and radiorespirometry (14C-CTN). Biochar and microbial community dilution affected structure of the microbial community. In spite of that, CTN mineralization was slow, but dissipation was very fast (D50 < 1.0 d) due to immediate chemical degradation and formation of non-extractable (bound) residues. However, any depletion on soil microbial diversity strongly affected CTN mineralization, suggesting that this function is related to less abundant but specific microbial groups (CTN degraders) or to soil microbial diversity. The extent of these effects will strongly depend on the compound nature (recalcitrance) and soil matrix/substrate (bioavailability). It can be corroborated by the fact that biochar affected CTN sorption, its bioavailability, and subsequently its mineralization rate in the NS. These data indicate a strong relationship between soil microbial diversity and pesticide degradation, which is an acting form to mitigate xenobiotics accumulation in the environment.

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Multiple dimensions of bacterial diversity unrelated to functioning, stability and multifunctionality

Cited by 2 publications

References 38 publications

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The depleted mineralization of the fungicide chlorothalonil derived from loss in soil microbial diversity

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