Tree diversity effects on litter decomposition are mediated by litterfall and microbial processes

Oikos, Год журнала: 2023, Номер 2023(10)

Опубликована: Июль 12, 2023

Forest ecosystems are critical for their carbon sequestration potential. Increasing tree diversity has been shown to enhance both forest productivity and litter decomposition. Litter increases decomposability by increasing the of substrates offered decomposers. However, relative importance decomposer community in mediating effects on decomposition remains unknown. Moreover, modulation litterfall spatial distribution, consequently decomposition, rarely tested. We studied leaf its mediation amount litterfall, species richness decomposability, soil microorganisms a large‐scale experiment subtropical China. Furthermore, we examined how functional identity affect decomposability. Finally, tested traits, biomass, structure drive distribution. found evidence that increased litterfall. showed this perform 84–87% changes microbial explained 19–37% variance. Additionally, up 20% variance was while itself determined identity, diversity, richness. Tree (+200% from monoculture eight‐species neighborhood). further demonstrated species‐specific with proximity modulated traits. These drivers heterogeneity thus highlighted multiple biomass‐ diversity‐mediated ecosystem properties driving nutrient cycling. conclude considering variability biotic will improve our mechanistic understanding functioning.

Язык: Английский

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No home‐field advantage in litter decomposition from the desert to temperate forest

Functional Ecology, Год журнала: 2023, Номер 37(5), С. 1315 - 1327

Опубликована: Янв. 28, 2023

Abstract Litter decomposition rates are determined by the interplay of climate, decomposer organisms and litter quality. It has been suggested that community may be locally adapted to quality, providing a home‐field advantage (HFA) resulting in accelerated local compared non‐local litter, after accounting for differences due quality functional capacity microorganisms. Although widely tested forests, this hypothesis remains controversial lacks support its generality across climates. We therefore HFA four contrasting ecosystems along an extensive climatic gradient Chile, using translocation experiment involving from 20 species. In addition comparing mass loss, we adopted novel way disentangle effects climate effects, based on loss elements actively released decomposers during breakdown versus simply leached precipitation. used ratios nitrogen potassium losses (N/K loss) phosphorus (P/K unravel relative role microbial (N P physical leaching (K gradient. Thus, at each site, whether N/K P/K presented additional litter. Across wide range environments types, our findings unequivocally contradicted hypothesis. observed no significantly positive gradient; however, general ability influenced much more strongly than origin or location Our study questions applicability calls studies include large conditions understand context‐dependency HFA. Read free Plain Language Summary article Journal blog.

Язык: Английский

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Home‐field advantage, N‐priming and precipitation independently govern litter decomposition in a plant diversity manipulation

Functional Ecology, Год журнала: 2024, Номер 38(4), С. 820 - 831

Опубликована: Фев. 5, 2024

Abstract Litter decomposition facilitates the recycling of often limiting resources, which may promote plant productivity responses to diversity, that is, overyielding. However, direct relationship between decomposition, k , and overyielding remains underexplored in grassland diversity manipulations. We test whether local adaptation microbes, home‐field advantage (HFA), N‐priming from inputs or precipitation drive generates Within a diversity‐manipulation, altering richness (1, 2, 3 6 species), composition (communities composed plants single‐family multiple‐families) (50% 150% ambient growing season precipitation), we conducted litter experiment. In spring 2020, deployed four replicate switchgrass, Panicum virgatum bags (1.59 mm mesh opening), collecting them over 7 months estimate . Precipitation was strong, independent driver decomposition. Switchgrass accelerated with grass decelerated as phylogenetic dissimilarity switchgrass increased, suggesting is fastest at ‘home’. slowed density. plots contained observed no fungal saprotroph switchgrass. without increasing Combined these findings suggest HFA strongest when closely related neighbours, heterospecific are present community, rather than other individuals same species, conspecifics. Legumes more N remaining those plots, N‐inputs planted legumes priming C. were unrelated legume communities. While communities, positively low densities neighbours. species community stimulate through multiple mechanisms, including N‐priming, but only microbes on correlates overyielding, likely resource recycling. Our results link ecosystem processes facilitating above‐ground productivity. Whether loss will affect both contingent resident traits locally adapted soil microbiome maintained. Read free Plain Language Summary for this article Journal blog.

Язык: Английский

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Soil fungal and bacterial communities reflect differently tundra vegetation state transitions and soil physico‐chemical properties

New Phytologist, Год журнала: 2024, Номер 243(1), С. 407 - 422

Опубликована: Май 15, 2024

Summary Strong disturbances may induce ecosystem transitions into new alternative states that sustain through plant–soil interactions, such as the transition of dwarf shrub‐dominated graminoid‐dominated vegetation by herbivory in tundra. Little evidence exists on soil microbial communities states, and along slow process return predisturbance state. We analysed vegetation, activities well physico‐chemical properties historical reindeer enclosures northernmost Finland following plot types: control heaths surrounding tundra; graminoid‐dominated; ‘shifting’; recovered inside enclosures. Soil fungal followed changes whereas bacterial were more affected properties. Graminoid plots characterized moulds, pathotrophs dark septate endophytes. Ericoid mycorrhizal saprotrophic fungi typical for plots. showed contingency, their spatial variation was high despite being homogeneous. Self‐maintaining feedback loops between plant functional types, communities, carbon nutrient mineralization act effectively to stabilize but once reestablishes itself, back towards

Язык: Английский

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Tree species identity and mixing ratio affected the release of several metallic elements from mixed litter in coniferous-broadleaf plantations in subtropical China

The Science of The Total Environment, Год журнала: 2022, Номер 838, С. 156143 - 156143

Опубликована: Май 21, 2022

Язык: Английский

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