Melanin mitigates the accelerated decay of mycorrhizal necromass with peatland warming

Christopher W. Fernandez, Katherine Heckman, Randall Kolka, Peter G Kennedy

Research output: Contribution to journalLetter

2 Citations (Scopus)

Abstract

Despite being a significant input into soil carbon pools of many high-latitude ecosystems, little is known about the effects of climate change on the turnover of mycorrhizal fungal necromass. Here, we present results from the first experiment examining the effects of climate change on the long-term decomposition of mycorrhizal necromass, utilising the Spruce and Peatland Response Under Changing Environments (SPRUCE) experiment. Warming significantly increased necromass decomposition rates but was strongest in normally submerged microsites where warming caused water table drawdown. Necromass chemistry exerted the strongest control on the decomposition, with initial nitrogen content strongly predicting early decay rates (3 months) and initial melanin content determining mass remaining after 2 years. Collectively, our results suggest that as global temperatures rise, variation in species biochemical traits as well as microsites where mycorrhizal necromass is deposited will determine how these important inputs contribute to the belowground storage of carbon in boreal peatlands.

Original languageEnglish (US)
Pages (from-to)498-505
Number of pages8
JournalEcology letters
Volume22
Issue number3
DOIs
StatePublished - Mar 1 2019

Fingerprint

melanin
peatlands
peatland
warming
deterioration
decomposition
climate change
degradation
drawdown
soil carbon
water table
turnover
experiment
carbon sequestration
carbon sinks
ecosystem
nitrogen
carbon
nitrogen content
Picea

Keywords

  • Bog microtopography
  • carbon cycling
  • decomposition
  • microbial residues
  • nitrogen cycling

PubMed: MeSH publication types

  • Letter

Cite this

Melanin mitigates the accelerated decay of mycorrhizal necromass with peatland warming. / Fernandez, Christopher W.; Heckman, Katherine; Kolka, Randall; Kennedy, Peter G.

In: Ecology letters, Vol. 22, No. 3, 01.03.2019, p. 498-505.

Research output: Contribution to journalLetter

Fernandez, Christopher W. ; Heckman, Katherine ; Kolka, Randall ; Kennedy, Peter G. / Melanin mitigates the accelerated decay of mycorrhizal necromass with peatland warming. In: Ecology letters. 2019 ; Vol. 22, No. 3. pp. 498-505.
@article{5d731933990346ab80564909b9916625,
title = "Melanin mitigates the accelerated decay of mycorrhizal necromass with peatland warming",
abstract = "Despite being a significant input into soil carbon pools of many high-latitude ecosystems, little is known about the effects of climate change on the turnover of mycorrhizal fungal necromass. Here, we present results from the first experiment examining the effects of climate change on the long-term decomposition of mycorrhizal necromass, utilising the Spruce and Peatland Response Under Changing Environments (SPRUCE) experiment. Warming significantly increased necromass decomposition rates but was strongest in normally submerged microsites where warming caused water table drawdown. Necromass chemistry exerted the strongest control on the decomposition, with initial nitrogen content strongly predicting early decay rates (3 months) and initial melanin content determining mass remaining after 2 years. Collectively, our results suggest that as global temperatures rise, variation in species biochemical traits as well as microsites where mycorrhizal necromass is deposited will determine how these important inputs contribute to the belowground storage of carbon in boreal peatlands.",
keywords = "Bog microtopography, carbon cycling, decomposition, microbial residues, nitrogen cycling",
author = "Fernandez, {Christopher W.} and Katherine Heckman and Randall Kolka and Kennedy, {Peter G}",
year = "2019",
month = "3",
day = "1",
doi = "10.1111/ele.13209",
language = "English (US)",
volume = "22",
pages = "498--505",
journal = "Ecology Letters",
issn = "1461-023X",
publisher = "Wiley-Blackwell",
number = "3",

}

TY - JOUR

T1 - Melanin mitigates the accelerated decay of mycorrhizal necromass with peatland warming

AU - Fernandez, Christopher W.

AU - Heckman, Katherine

AU - Kolka, Randall

AU - Kennedy, Peter G

PY - 2019/3/1

Y1 - 2019/3/1

N2 - Despite being a significant input into soil carbon pools of many high-latitude ecosystems, little is known about the effects of climate change on the turnover of mycorrhizal fungal necromass. Here, we present results from the first experiment examining the effects of climate change on the long-term decomposition of mycorrhizal necromass, utilising the Spruce and Peatland Response Under Changing Environments (SPRUCE) experiment. Warming significantly increased necromass decomposition rates but was strongest in normally submerged microsites where warming caused water table drawdown. Necromass chemistry exerted the strongest control on the decomposition, with initial nitrogen content strongly predicting early decay rates (3 months) and initial melanin content determining mass remaining after 2 years. Collectively, our results suggest that as global temperatures rise, variation in species biochemical traits as well as microsites where mycorrhizal necromass is deposited will determine how these important inputs contribute to the belowground storage of carbon in boreal peatlands.

AB - Despite being a significant input into soil carbon pools of many high-latitude ecosystems, little is known about the effects of climate change on the turnover of mycorrhizal fungal necromass. Here, we present results from the first experiment examining the effects of climate change on the long-term decomposition of mycorrhizal necromass, utilising the Spruce and Peatland Response Under Changing Environments (SPRUCE) experiment. Warming significantly increased necromass decomposition rates but was strongest in normally submerged microsites where warming caused water table drawdown. Necromass chemistry exerted the strongest control on the decomposition, with initial nitrogen content strongly predicting early decay rates (3 months) and initial melanin content determining mass remaining after 2 years. Collectively, our results suggest that as global temperatures rise, variation in species biochemical traits as well as microsites where mycorrhizal necromass is deposited will determine how these important inputs contribute to the belowground storage of carbon in boreal peatlands.

KW - Bog microtopography

KW - carbon cycling

KW - decomposition

KW - microbial residues

KW - nitrogen cycling

UR - http://www.scopus.com/inward/record.url?scp=85059523618&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85059523618&partnerID=8YFLogxK

U2 - 10.1111/ele.13209

DO - 10.1111/ele.13209

M3 - Letter

VL - 22

SP - 498

EP - 505

JO - Ecology Letters

JF - Ecology Letters

SN - 1461-023X

IS - 3

ER -