Effects of microtopography on absorptive and transport fine root biomass, necromass, production, mortality and decomposition in a coastal freshwater forested wetland, southeastern USA
| hal.structure.identifier | Department of Forestry and Environmental Resources | |
| dc.contributor.author | LI, Xuefeng | |
| hal.structure.identifier | Department of Forestry and Environmental Resources | |
| dc.contributor.author | MINICK, Kevan J. | |
| hal.structure.identifier | Department of Forestry and Environmental Resources | |
| hal.structure.identifier | Rubenstein School of Environment and Natural Resources | |
| dc.contributor.author | LUFF, Jordan | |
| hal.structure.identifier | Department of Ecosystem Science and Management | |
| dc.contributor.author | NOORMETS, Asko | |
| hal.structure.identifier | Department of Forestry and Environmental Resources | |
| hal.structure.identifier | University of Illinois at Urbana-Champaign [Urbana] [UIUC] | |
| dc.contributor.author | MIAO, Guofang | |
| hal.structure.identifier | Department of Ecosystem Science and Management | |
| dc.contributor.author | MITRA, Bhaskar | |
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| dc.contributor.author | DOMEC, Jean-Christophe | |
| hal.structure.identifier | Eastern Forest Environmental Threat Assessment Center | |
| dc.contributor.author | SUN, Ge | |
| hal.structure.identifier | Eastern Forest Environmental Threat Assessment Center | |
| dc.contributor.author | MCNULTY, Steven | |
| hal.structure.identifier | Department of Forestry and Environmental Resources | |
| dc.contributor.author | KING, John S. | |
| dc.date.accessioned | 2024-04-08T12:05:24Z | |
| dc.date.available | 2024-04-08T12:05:24Z | |
| dc.date.issued | 2020 | |
| dc.identifier.issn | 1432-9840 | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/196354 | |
| dc.description.abstractEn | Forested wetlands are an important carbon (C) sink. Fine roots (diameter < 2 mm) dominate belowground C cycling and can be functionally defined into absorptive roots (order 1–2) and transport roots (order ≥ 3). However, effects of microtopography on the function-based fine root dynamics in forested wetlands are poorly understood. We studied fine root biomass allocation and biomass, necromass, mass loss rate, production, mortality and decomposition of absorptive and transport roots in hummocks and hollows in a coastal plain freshwater forested wetland (FFW) in the southeastern USA using dynamic-flow method. Biomass ratios of first- to second-order roots and absorptive to transport roots and the biomass and necromass of absorptive and transport roots were significantly higher in top 0–10 cm organic peat layer than in 10–20 cm muck and mineral layer, and were significantly higher in hummocks than in hollows. The mass loss rate, production, mortality and decomposition were significantly higher in hummocks than in hollows. Absorptive roots did not have a lower mass loss rate than transport roots. Microtopography significantly affected the contributions of absorptive and transport roots to the total production, mortality and decomposition. Production, mortality and decomposition of absorptive roots were higher than those of transport roots in hummocks but lower than those of transport roots in hollows. Total (hummocks plus hollows) fine root production, mortality and decomposition were 455 ± 106 g m−2 y−1, 475 ± 79 g m−2 y−1 and 392 ± 60 g m−2 y−1, respectively. Greater mortality than decomposition resulted in net fine root C input to soil. The observed microtopographic controls on fine root dynamics have great implications for soil C cycling. As sea level rises, the relative area of hollows in coastal plain FFWs will increase, causing a decrease in fine root mass loss rate, biomass, production, mortality and decomposition and it is the balance of these processes that will determine future soil C storage and cycling. | |
| dc.language.iso | en | |
| dc.publisher | Springer Verlag | |
| dc.subject | decomposition | |
| dc.subject.en | microtopography | |
| dc.subject.en | fine root | |
| dc.subject.en | necromass | |
| dc.subject.en | biomass | |
| dc.subject.en | production | |
| dc.subject.en | mortality | |
| dc.subject.en | forested wetland | |
| dc.title.en | Effects of microtopography on absorptive and transport fine root biomass, necromass, production, mortality and decomposition in a coastal freshwater forested wetland, southeastern USA | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1007/s10021-019-00470-x | |
| dc.subject.hal | Sciences du Vivant [q-bio] | |
| dc.subject.hal | Sciences de l'environnement | |
| bordeaux.journal | Ecosystems | |
| bordeaux.page | 1294–1308 | |
| bordeaux.volume | 23 | |
| bordeaux.hal.laboratories | Interactions Soil Plant Atmosphere (ISPA) - UMR 1391 | * |
| bordeaux.institution | Bordeaux Sciences Agro | |
| bordeaux.institution | INRAE | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-02623337 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-02623337v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ecosystems&rft.date=2020&rft.volume=23&rft.spage=1294%E2%80%931308&rft.epage=1294%E2%80%931308&rft.eissn=1432-9840&rft.issn=1432-9840&rft.au=LI,%20Xuefeng&MINICK,%20Kevan%20J.&LUFF,%20Jordan&NOORMETS,%20Asko&MIAO,%20Guofang&rft.genre=article |
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