The afterlife effects of fungal morphology: Contrasting decomposition rates between diffuse and rhizomorphic necromass

Certano, Amanda K.; Fernandez, Christopher W.; Heckman, Katherine; Kennedy, Peter G.

doi:10.1016/j.soilbio.2018.08.002

Cited by 27 publications

(23 citation statements)

References 43 publications

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“…Wilkinson, Alexander, and Johnson (2011) found no significant effect of the C or N contents or the C:N ratio of the necromass on necromass decomposition either. Other factors affecting necromass decomposition may include the composition of soil mineral (Amelung, Miltner, Zhang, & Zech, 2001), variations in the concentration of Ca (Langley & Hungate, 2003), the hydrophobicity of the microbial tissue (Lützow et al., 2006), and the morphology of the necromass (Certano et al., 2018). The newly formed necromass started to accumulate from day 9 and became a significant component of MAOM (Figure 5) after 21 days of incubation.…”

Section: Discussionmentioning

confidence: 99%

“…The ratio of aromatic to aliphatic functional groups has been shown to increase with greater recalcitrance of SOM (Chefetz et al., 1998). The amide I (1,655 cm −1 ) and the amide II (1,525 cm −1 ) bands were not involved in the calculation because of the confounding effects of multiple bond vibrations in these wave numbers (Certano, Fernandez, Heckman, & Kennedy, 2018).…”

Section: Methodsmentioning

confidence: 99%

“…(1,655 cm −1 ) and the amide II (1,525 cm −1 ) bands were not involved in the calculation because of the confounding effects of multiple bond vibrations in these wave numbers (Certano, Fernandez, Heckman, & Kennedy, 2018).…”

Section: Necromass Generationmentioning

confidence: 99%

See 2 more Smart Citations

Elevated temperature increases the accumulation of microbial necromass nitrogen in soil via increasing microbial turnover

Wang

Cotrufo

et al. 2020

Global Change Biology

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Microbial-derived nitrogen (N) is now recognized as an important source of soil organic N. However, the mechanisms that govern the production of microbial necromass N, its turnover, and stabilization in soil remain poorly understood. To assess the effects of elevated temperature on bacterial and fungal necromass N production, turnover, and stabilization, we incubated 15 N-labeled bacterial and fungal necromass under optimum moisture conditions at 10°C, 15°C, and 25°C. We developed a new 15 N tracing model to calculate the production and mineralization rates of necromass N. Our results showed that bacterial and fungal necromass N had similar mineralization rates, despite their contrasting chemistry. Most bacterial and fungal necromass 15 N was recovered in the mineral-associated organic matter fraction through microbial anabolism, suggesting that mineral association plays an important role in stabilizing necromass N in soil, independently of necromass chemistry. Elevated temperature significantly increased the accumulation of necromass N in soil, due to the relatively higher microbial turnover and production of necromass N with increasing temperature than the increases in microbial necromass N mineralization. In conclusion, we found elevated temperature may increase the contribution of microbial necromass N to mineral-stabilized soil organic N.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Elevated temperature increases the accumulation of microbial necromass nitrogen in soil via increasing microbial turnover

Wang

Cotrufo

et al. 2020

Global Change Biology

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“…Further, the general absence of an incubation time effect on microbial diversity indicates that fungal necromass likely represents a sustained ‘hotspot’ of decomposition (sensu Brabcová et al, 2016), even after the rapid mass loss observed during the first weeks of incubation. The general equivalency in microbial community diversity over time appears to be due to substitutions rather than gains or losses in local OTU dominance, likely reflecting shifts in substrate chemistry and the availability of resources during the course of necromass decomposition (Certano, Fernandez, Heckman, & Kennedy, 2018; Drigo et al, 2012; Fernandez, Heckman, et al, 2019; Ryan, Schreiner, Swenson, Gagne, & Kennedy, in press; Tláskal, Voříšková, & Baldrian, 2016).…”

Section: Discussionmentioning

confidence: 99%

Substrate quality drives fungal necromass decay and decomposer community structure under contrasting vegetation types

et al. 2020

Self Cite

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Fungal mycelium is increasingly recognized as a central component of soil biogeochemical cycling, yet our current understanding of the ecological controls on fungal necromass decomposition is limited to single sites and vegetation types. By deploying common fungal necromass substrates in a temperate oak savanna and hardwood forest in the midwestern USA, we assessed the generality of the rate at which high‐ and low‐quality fungal necromass decomposes; further, we investigated how the decomposer ‘necrobiome’ varies both across and within sites under vegetation types dominated by either arbuscular or ectomycorrhizal plants. The effects of necromass quality on decay rate were robust to site and vegetation type differences, with high‐quality fungal necromass decomposing, on average, 2.5 times faster during the initial stages of decay. Across vegetation types, bacterial and fungal communities present on decaying necromass differed from bulk soil microbial communities and were influenced by necromass quality. Moulds, yeasts and copiotrophic bacteria consistently dominated the necrobiome of high‐quality fungal substrates. Synthesis. We show that regardless of differences in decay environments, high‐quality fungal substrates decompose faster and support different types of decomposer micro‐organisms when compared with low‐quality fungal tissues. These findings help to refine our theoretical understanding of the dominant factors affecting fast cycling components of soil organic matter and the microbial communities associated with rapid decay.

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“…For example, chitin is modified easily, possibly providing an important source of soil C and N; by contrast, melanin is not modified easily, reducing the overall tissue decomposition ability [33]. Moreover, the different morphologies and biochemical composition of dead hyphae can influence their rate of decay [66]. In short, SOM decay is subjected to simultaneous regulation by the abovementioned five factors.…”

Section: Ecmf Promote the C N And P Cycles Through Involvement In Smentioning

confidence: 99%

Ectomycorrhizal Fungi: Participation in Nutrient Turnover and Community Assembly Pattern in Forest Ecosystems

Liu

Kou

2020

Forests

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Ectomycorrhizal fungi (EcMF) are involved in soil nutrient cycling in forest ecosystems. These fungi can promote the uptake of nutrients (e.g., nitrogen (N) and phosphorus (P)) and water by host plants, as well as facilitate host plant growth and resistance to stresses and diseases, thereby maintaining the aboveground primary productivity of forest ecosystems. Moreover, EcMF can acquire the carbon (C) sources needed for their growth from the host plants. The nutrient regulation mechanisms of EcMF mainly include the decay of soil organic matter via enzymatic degradation, nonenzymatic mechanism (Fenton chemistry), and priming effects, which in turn promote C and N cycling. At the same time, EcMF can secrete organic acids and phosphatases to improve the availability of soil P, or increase mycelium inputs to facilitate plant acquisition of P. The spatiotemporal distribution of EcMF is influenced by a combination of historical factors and contemporary environmental factors. The community of EcMF is associated with various factors, such as climate change, soil conditions, and host distribution. Under global climate change, investigating the relationships between the nutrient cycling functions of EcMF communities and their distribution patterns under various spatiotemporal scales is conducive to more accurate assessments of the ecological effects of EcMF on the sustainable development of forest.

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The afterlife effects of fungal morphology: Contrasting decomposition rates between diffuse and rhizomorphic necromass

Cited by 27 publications

References 43 publications

Elevated temperature increases the accumulation of microbial necromass nitrogen in soil via increasing microbial turnover

Elevated temperature increases the accumulation of microbial necromass nitrogen in soil via increasing microbial turnover

Substrate quality drives fungal necromass decay and decomposer community structure under contrasting vegetation types

Ectomycorrhizal Fungi: Participation in Nutrient Turnover and Community Assembly Pattern in Forest Ecosystems

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