Wood decomposition over a first-order watershed: Mass loss as a function of lignocellulase activity

Sinsabaugh, Robert L.; Antibus, Robert K.; Linkins, Arthur E.; McClaugherty, Charles; Rayburn, L.; Repert, Deborah A.; Weiland, Timothy

doi:10.1016/0038-0717(92)90248-v

Cited by 149 publications

(76 citation statements)

References 21 publications

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“…Moreover, the chemical nature of streambed substrata, such as the tannin content or the physical properties of leaves (high waxy cuticles), has been proposed as a major determinant of breakdown rate (Barlöcher et al 1995). Sinsabaugh et al (1992) determined that phenol oxidase activity was substrate-related but not site-related.…”

Section: Introductionmentioning

confidence: 99%

Organic matter decomposition by fungi in a Mediterranean forested stream : contribution of streambed substrata

Artigas

Romaní

Sabater

2004

Ann. Limnol. - Int. J. Lim.

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Aquatic microfungi play a fundamental role in organic matter decomposition in fluvial ecosystems. These micro-organisms degrade leaf recalcitrant compounds like lignin, thereby enhancing the utilization of organic material by the microbial community. The main input of allochthonous organic matter in Mediterranean streams occurs during the autumn. In-stream breakdown processes can be affected by high physical abrasion during flooding but changes in stream water chemistry may also affect decomposition enzymatic activities of stream microorganisms. We measured two ligninolytic activities (phenol oxidase and peroxidase) and a cellulolytic activity (cellobiohydrolase) in leaves, branches, sand and gravel substrata in a reach of a Mediterranean stream. Highest ligninolytic activities were measured in biofilm developed on inorganic substrata (sand and gravel) where also accumulated the highest fungal biomass (ranging from 3.3 x 10 -4 to 7.22 mg Ergosterol gAFDM -1 ) especially in sand substrata. Conversely, cellulolytic activities were significantly higher in biofilm on organic substrata (leaves and branches). Physical and chemical factors, such as discharge and stream water nutrient concentration (Dissolved Inorganic Nitrogen) were affecting enzymatic activities, particularly enhancing the phenol oxidase. Moreover, the chemical composition of the available OM (high cellulose in leaves, high lignin in detritic material) strongly influenced the decomposition activity in each biofilm. A precise description and quantification of the benthic substrata was used to obtain enzymatic activity values in terms of stream reach. Those results showed a temporal pattern in the decomposition activities in the reach, beginning with the decomposition of cellulose (October) followed by lignin compounds (November and December).

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Section: Introductionmentioning

confidence: 99%

Organic matter decomposition by fungi in a Mediterranean forested stream : contribution of streambed substrata

Artigas

Romaní

Sabater

2004

Ann. Limnol. - Int. J. Lim.

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“…Since the concentration of lignin in plant material is inversely related to its decomposition rate (Meentmeyer 1978: Berendse et al 1987Sinsabaugh et al 1992), 1 hypothesized that N additions would alter the active bacterial and fungal biomass and the degradation of 14 C-cellulose-labeled lignocellulose and 14C-lignin-labeled lignocellulose in blackwater and redwater forested wetland soils.…”

Section: Introductionmentioning

confidence: 99%

Influence of nitrogen on cellulose and lignin mineralization in blackwater and redwater forested wetland soils

Entry

2000

Biology and Fertility of Soils

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Microcosms were used to determine the influence of N additions on active bacterial and active fungal biomass, cellulose degradation and lignin degradation at 5, 10 and 15 weeks in soils from blackwater and redwater wetlands in the northern Florida panhandle. Blackwater streams contain a high dissolved organic C concentration which imparts a dark color to the water and contain low concentrations of nutrients. Redwater streams contain high concentrations of suspended clays and inorganic nutrients, such as N and P, compared to blackwater streams. Active bacterial and fungal biomass was determined by direct microscopy; cellulose and lignin degradation were measured radiometrically. The experimental design was a randomized block. Treatments were: soil type (blackwater or redwater forested wetlands) and N additions (soils amended with the equivalent of 0, 200 or 400 kg N ha-1 as NH4NO3 ). Redwater soils contained higher concentrations of C, total N, P, K, Ca, Mn, Fe, B and Zn than blackwater soils. After N addition and 15 weeks of incubation, the active bacterial biomass in redwater soils was lower than in blackwater soils; the active bacterial biomass in blackwater soils was lower when 400 kg N ha', but not when 200 kg N ha-1 , was added. The active fungal biomass in blackwater soils was higher when 400 kg N ha-1 , but not when 200 kg N ha-1 , was added. The active fungal biomass in redwater wetland soils was lower when 200 kg N ha-1 , but not when 400 kg N ha-1 , was added. Cellulose and lignin degradation was higher in redwater than in blackwater soils. After 10 and 15 weeks of incubation, the addition of 200 or 400 kg N as NH4NO3 ha-1 decreased cellulose and lignin degradation in both wetland soils to similar levels. This study indicated that the addition of N may slow organic matter degradation and nutrient mineralization, thereby creating deficiencies of other plant-essential nutrients in wetland forest soils.

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“…Degradation of cellulose is a slow process that is limited by several factors involving cellulases, such as concentration, location, and mobility of the enzymes [32]. Decomposition of lignocellulosic residues is directly mediated by extracellular enzymes [33]; therefore, analysis of the dynamics involved in increase of cellulolytic activity with exposure of ZnO-NPs may clarify the mechanisms relating the rate of decomposition with substrate quality and nutrient availability as reported by Sinsabaugh and Linkins [34]. In recent years, there is increasing interest in how soil fauna shapes the composition of soil ecosystem; thereby affecting decomposition, nutrient cycling and bioremediation.…”

Section: Increase In Cellulolytic Activitymentioning

confidence: 99%

Bioaccumulation of ZnO-NPs in Earthworm Eisenia fetida (Savigny)

Gupta¹,

Yadav²

2014

J Bioremed Biodeg

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Wood decomposition over a first-order watershed: Mass loss as a function of lignocellulase activity

Cited by 149 publications

References 21 publications

Organic matter decomposition by fungi in a Mediterranean forested stream : contribution of streambed substrata

Organic matter decomposition by fungi in a Mediterranean forested stream : contribution of streambed substrata

Influence of nitrogen on cellulose and lignin mineralization in blackwater and redwater forested wetland soils

Bioaccumulation of ZnO-NPs in Earthworm Eisenia fetida (Savigny)

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