Twenty years of litter manipulation reveals that above-ground litter quantity and quality controls soil organic matter molecular composition

Man, Meiling; Pierson, Derek; Chiu, Ricky Y.T.; Anaraki, Maryam Tabatabaei; vandenEnden, Lori; Ye, RenXi; Lajtha, Kate; Simpson, Myrna J.

doi:10.1007/s10533-022-00934-8

Cited by 16 publications

(10 citation statements)

References 77 publications

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“…Targeted analysis of numerous plant‐ and microbial‐derived compounds from BF, HF, and HJA DIRT experiments collected after 20 years of experiment was compiled into one single database. The detailed protocols and original data sets for these analyses are published and discussed in detail in Pisani et al (2016), Wang et al (2017) and Man et al (2022). Briefly, soil cores were collected from each experimental plot (two for BF and HF, and six for HJA) and combined into a composite sample, freeze‐dried, sieved to 2 mm, and ground for sequential chemical extractions, microbial phospholipid fatty acid (PLFA) analyses, and solid‐state 13 C nuclear magnetic resonance (NMR) spectroscopy.…”

Section: Methodsmentioning

confidence: 99%

“…In (b), percentages in parentheses represent the relative abundance of each species at each site and its litter C:N ratio, whereas x̅ C:N represents the weighted averages of leaf C:N of the dominant tree species. Data from a Bowden et al (2014), b Crow et al (2009), c Fanin et al (2020), d Lajtha et al (2014), e UC Davis Soil Resource Laboratory (2021), f Pierson et al (2021), g Man et al (2022), h BF 20 year harvest unpublished data, i Schwaner and Kelly (2019), j Adams and Angradi (1996) k Corrigan (2008) l King et al (2001) m Parsons et al (2004), n Stanek et al (2020), o Perakis et al (2012), p Yano et al (2005), q Edmonds (1980), r Edmonds and Thomas (1995), s Acker et al (2003), t Vanderbilt et al (2003), u Georgiou et al (2022).…”

Section: Introductionmentioning

confidence: 99%

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Soil organic matter molecular composition with long‐term detrital alterations is controlled by site‐specific forest properties

Castañeda‐Gómez

Lajtha

Bowden

et al. 2022

Global Change Biology

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Forest ecosystems are important global soil carbon (C) reservoirs, but their capacity to sequester C is susceptible to climate change factors that alter the quantity and quality of C inputs. To better understand forest soil C responses to altered C inputs, we integrated three molecular composition published data sets of soil organic matter (SOM) and soil microbial communities for mineral soils after 20 years of detrital input and removal treatments in two deciduous forests: Bousson Forest (BF), Harvard Forest (HF), and a coniferous forest: H.J. Andrews Forest (HJA). Soil C turnover times were estimated from radiocarbon measurements and compared with the molecularlevel data (based on nuclear magnetic resonance and specific analysis of plant-and microbial-derived compounds) to better understand how ecosystem properties control soil C biogeochemistry and dynamics. Doubled aboveground litter additions did not increase soil C for any of the forests studied likely due to long-term soil priming. The degree of SOM decomposition was higher for bacteria-dominated sites with higher nitrogen (N) availability while lower for the N-poor coniferous forest. Litter exclusions significantly decreased soil C, increased SOM decomposition state, and led to the adaptation of the microbial communities to changes in available substrates.Finally, although aboveground litter determined soil C dynamics and its molecular composition in the coniferous forest (HJA), belowground litter appeared to be more influential in broadleaf deciduous forests (BH and HF). This synthesis demonstrates that inherent ecosystem properties regulate how soil C dynamics change with litter manipulations at the molecular-level. Across the forests studied, 20 years of litter additions did not enhance soil C content, whereas litter reductions negatively impacted soil C concentrations. These results indicate that soil C biogeochemistry at these temperate forests is highly sensitive to changes in litter deposition, which are a product of environmental change drivers.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Soil organic matter molecular composition with long‐term detrital alterations is controlled by site‐specific forest properties

Castañeda‐Gómez

Lajtha

Bowden

et al. 2022

Global Change Biology

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“…Plants sequester carbon dioxide in their tissues through photosynthesis and sustain themselves by taking in water and nutrients ( Keenan and Williams 2018 ). During their growth phase, plants inject large amounts of litter, dead roots, and root exudates, which are the major sources of the soil C ( Chari and Taylor 2022 ;Man et al 2022 ;Panchal et al 2022 ). Vegetation restoration significantly increased the proportion of macroag-gregates in the soil (see Fig.…”

Section: Effects Of Vegetation Restoration On Soil C Stocksmentioning

confidence: 99%

“…Vegetation restoration can increase the soil OC content through the input of plant residues and roots (Zhong et al 2019; Wang et al 2020; Man et al 2022). It can also reduce OC mineralization by improving the soil physical and chemical properties, thus promoting the accumulation of C in the soil (Zhong et al 2019; Guan et al 2020; Angst et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Effects of Natural Succession and Forest Landscape Restoration on Soil C and Aggregate-Associated C in the Central Loess Plateau, China

Wang¹

2023

Rangeland Ecology & Management

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“…Indeed, OM added to the soils can take two main pathways: incorporation into soil organic layers or mineralization ( Angst et al, 2021 ). In the first pathway, OM may persist in soils, sometimes for thousands of years ( Schmidt et al, 2011 ), where it will be integrated into the organo-mineral layers, stocking up the soil’s organic carbon bank ( Man et al, 2022 ). In the second pathway, the decay of dead plant and animal material (i.e., litter) transforms complex organic molecules into simpler organic and inorganic molecules.…”

Section: Introductionmentioning

confidence: 99%

Solar radiation explains litter degradation along alpine elevation gradients better than other climatic or edaphic parameters

et al. 2023

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Organic matter (OM) decomposition has been shown to vary across ecosystems, suggesting that variation in local ecological conditions influences this process. A better understanding of the ecological factors driving OM decomposition rates will allow to better predict the effect of ecosystem changes on the carbon cycle. While temperature and humidity have been put forward as the main drivers of OM decomposition, the concomitant role of other ecosystem properties, such as soil physicochemical properties, and local microbial communities, remains to be investigated within large-scale ecological gradients. To address this gap, we measured the decomposition of a standardized OM source – green tea and rooibos tea – across 24 sites spread within a full factorial design including elevation and exposition, and across two distinct bioclimatic regions in the Swiss Alps. By analyzing OM decomposition via 19 climatic, edaphic or soil microbial activity-related variables, which strongly varied across sites, we identified solar radiation as the primary source of variation of both green and rooibos teabags decomposition rate. This study thus highlights that while most variables, such as temperature or humidity, as well as soil microbial activity, do impact decomposition process, in combination with the measured pedo-climatic niche, solar radiation, very likely by means of indirect effects, best captures variation in OM degradation. For instance, high solar radiation might favor photodegradation, in turn speeding up the decomposition activity of the local microbial communities. Future work should thus disentangle the synergistic effects of the unique local microbial community and solar radiation on OM decomposition across different habitats.

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Twenty years of litter manipulation reveals that above-ground litter quantity and quality controls soil organic matter molecular composition

Cited by 16 publications

References 77 publications

Soil organic matter molecular composition with long‐term detrital alterations is controlled by site‐specific forest properties

Soil organic matter molecular composition with long‐term detrital alterations is controlled by site‐specific forest properties

Effects of Natural Succession and Forest Landscape Restoration on Soil C and Aggregate-Associated C in the Central Loess Plateau, China

Solar radiation explains litter degradation along alpine elevation gradients better than other climatic or edaphic parameters

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