Roles of Woody Root-Associated Fungi in Forest Ecosystem Processes: Recent Advances in Fungal Identification

Mountain, Rocky; Hoff, Jill A.; Klopfenstein, Ned B.; Tonn, Jonalea R.; McDonald, Geral I.; Zambino, Paul J.; Rogers, Jack D.; Peever, Tobin L.; Carris, L. M.

doi:10.2737/rmrs-rp-47

Cited by 9 publications

(9 citation statements)

References 19 publications

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“…In contrast, harvesting significantly increased CWD by 115% in EAM stands and mineral soil C by 14% in UAM stands, compared with NHM. It is not surprising that CWD increased with harvesting, because a large amount of residual tree slash is typically left on-site (Harmon et al 1990;Hoff et al 2004;Houghton 1996). However, we were surprised that only the EAM sites showed this increase at MOFEP.…”

Section: Discussionmentioning

confidence: 99%

Effects of timber harvest on carbon pools in Ozark forests

Chen

Moorhead

et al. 2007

Can. J. For. Res.

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We quantified and compared carbon (C) pools at a Missouri Ozark experimental forest 8 years after different harvest treatments. Total C pools were 182, 170, and 130 Mg CÁha -1 for the control (no-harvest management; NHM), singletree, uneven-age management (UAM), and clearcut even-age management (EAM) stands, respectively. Harvesting reduced the live tree C pool by 31% in the UAM, 93% in EAM stands, and increased the coarse woody debris (CWD) C pool by 50% in UAM and 176% for EAM, compared with NHM stands. UAM significantly (p = 0.02) increased the mineral soil C pool by 14%, whereas EAM had no effect. More interestingly, the distribution of C among various components (i.e., live, dead wood, CWD, litter, and soil) ranged from 0.7% to 29% on NHM stands and from 0.1% to 43% on EAM stands. Soil nitrogen (N) (%) was significantly correlated with soil C (%) in the UAM stands, whereas soil temperature was negatively related to live tree C. Soil N (%) and canopy cover were significantly correlated with live tree and soil C (%) pools at EAM stands. Our results revealed that the largest C pool in these forests was living trees. The soil and CWD C pool sizes suggest the importance of dynamics of decaying harvest debris, which influences N retention.Résumé : Nous avons quantifié et comparé les réservoirs de carbone (C) dans une forêt expérimentale située dans les monts Ozark au Missouri huit ans après que différents traitements de récolte eurent été appliqués. La quantité totale de carbone dans les différents réservoirs de carbone atteignait respectivement 182, 170 et 130 Mg CÁha -1 dans le traitement témoin (aménagement sans récolte), avec un aménagement inéquienne par pied d'arbre (AIPA) et avec un aménagement équienne et une coupe à blanc (AECB). La récolte a réduit le réservoir de C des arbres vivants de 31 % dans le système AIPA et de 93 % dans le système AECB et augmenté le réservoir de C dans les débris ligneux grossiers (DLG) de 31 % dans le système AIPA et de 176 % dans le système AECB comparativement aux peuplements non récoltés. Le système AIPA a significativement (p = 0,02) augmenté le réservoir de C du sol minéral de 14 % tandis que le système AECB n'a eu aucun effet. Il était plus intéressant de constater que la distribution de C parmi les diverses composantes (c.-à-d. le bois vivant, le bois mort, les DLG, la litière et le sol) variait de 0,7 % à 29 % dans les peuplements non coupés et de 0,1 % à 43 % dans les peuplements coupés à blanc. L'azote (N) (%) dans le sol était significativement corrélé avec le C (%) dans le sol dans le système AIPA. Nos résultats révèlent que le plus important réservoir de C dans ces forêts est constitué des arbres vivants. La dimension des réservoirs de C du sol et des DLG montre l'importance de la dynamique de la décomposition des déchets de coupe qui influence la rétention de N.[Traduit par la Rédaction]

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Section: Discussionmentioning

confidence: 99%

Effects of timber harvest on carbon pools in Ozark forests

Chen

Moorhead

et al. 2007

Can. J. For. Res.

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“…Any putative Armillaria spp. isolates were identified to genet and North American Biological Species by our cooperator Dr. Ned Klopfenstein or his students using established tester cultures and amplified restriction fragment length polymorphism molecular assays (Hoff 2002;Hoff et al 2004aHoff et al , 2004b. We also isolated and identified any fungal endophytes that were present in roots (Hoff 2002;Hoff et al 2004aHoff et al , 2004b.…”

Section: Identifying Tree-killing Root Pathogensmentioning

confidence: 99%

“…To provide more information about such communities, we conducted an exploratory survey of the fungal endophyte community of dry forests using the same increment cores extracted from the woody roots of the asymptomatic Douglas-fir and ponderosa pine that were sampled for latent root disease. Fungal isolates were cultured on standard media, and then were identified using a combination of molecular and morphological methods (Hoff et al 2004b). Fungal genera and species identified in this study provide baseline data for future surveys of fungal endophytes.…”

Section: Fungal Endophytesmentioning

confidence: 99%

“…Fungal genera and species identified in this study provide baseline data for future surveys of fungal endophytes. A complete write-up and explanation of the ecological roles of endophytes, methods for isolation, and a discussion of their importance may be found in Hoff 2002, andHoff et al 2004b. genera, 111 (38.4 percent) yielded growth of one fungal genus, and 151 (52.2 percent) yielded no fungi (table 7-1).…”

Section: Fungal Endophytesmentioning

confidence: 99%

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Dry forests of the Northeastern Cascades Fire and Fire Surrogate project site, Mission Creek, Okanogan-Wenatchee National Forest

Agee¹,

Lehmkuhl²

2009

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The Forest Service of the U.S. Department of Agriculture is dedicated to the principle of multiple use management of the Nation's forest resources for sustained yields of wood, water, forage, wildlife, and recreation. Through forestry research, cooperation with the States and private forest owners, and management of the National Forests and National Grasslands, it strives-as directed by Congress-to provide increasingly greater service to a growing Nation. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.

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“…The microbial components of soil are entirely responsible for the decomposition of organic matter (Forsyth, 2009). The roles of microbes as summarized by Hoff et al (2004) include…”

Section: Introductionmentioning

confidence: 99%

Molecular characterization of some bacteria and fungi associated with the decomposition of leaf litters of <i>Eucalyptus camaldulensis</i> and <i>Tectona grandis</i>

Ndibe¹,

Onwumere²

2019

Nig. J. Biotechnol

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Eucalyptus camaldulensis and Tectona grandis, have the characteristics of fast growth rate. The decomposition of litter biomass of these exotic plants is necessary in order to return the nutrients taken up by the plants. Some of the major nutrients include nitrogen, carbon, phosphorus, potassium, calcium and magnesium. To have a better understanding of the decomposition of leaf litters of E. camaldulensis and T. grandis, bacteria and fungi associated with their decomposition were investigated. Soil and leaf litters of these exotic plant species were collected from six sampling sites of each plantation designated as E1-E6 for E. camaldulensis and T1-T6 for T. grandis, respectively. Litterbag technique was employed for the decomposition study which lasted for 60 days. Using standard methods, analysis of carbon (IV) oxide evolution and microbial population were done at day 1, 30 and 60 of the decomposition period. Results showed that there was a general decrease in the percentage mass loss of E. camaldulensis and T. grandis leaf litter samples, which ranged from 71-85% and 40-61% respectively. The amount of carbon, nitrogen, phosphorus, potassium, calcium and magnesium decreased in the leaf litter but increased in the soil during decomposition. The evolution of CO was highest in E4 on day 60 (554.4 µg/g/day) among E. camaldulensis samples, 2 whereas the evolution of CO was highest in T2 on day 30with a value of 516.5 µg/g/day 2 among T. grandis samples. The bacteria isolated during the decomposition periods were Bacillus licheniformis, Pseudomonas putida, Bacillus subtilis, Micrococcus luteus, Proteus vulgaris while fungi were Aspergillus niger and Penicillium notatum. Bacillus licheniformis was the most prevalent bacteria isolated. There is need to molecularly establish the specific capability of each microbial isolate with the view to identifying those that sequentially elaborate enzymes that can completely metabolize the leaf litters to their elemental form for adequate enrichment of the soil. This will enhance rapid recovery of the composite undergrowth and also promote diverse microbial colonization.

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Roles of Woody Root-Associated Fungi in Forest Ecosystem Processes: Recent Advances in Fungal Identification

Cited by 9 publications

References 19 publications

Effects of timber harvest on carbon pools in Ozark forests

Effects of timber harvest on carbon pools in Ozark forests

Dry forests of the Northeastern Cascades Fire and Fire Surrogate project site, Mission Creek, Okanogan-Wenatchee National Forest

Molecular characterization of some bacteria and fungi associated with the decomposition of leaf litters of <i>Eucalyptus camaldulensis</i> and <i>Tectona grandis</i>

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