Tropical Forest Litter Decomposition under Seasonal Drought: Nutrient Release, Fungi and Bacteria

Oikos ◽  
1994 ◽  
Vol 70 (2) ◽  
pp. 183 ◽  
Author(s):  
Fernando H. Cornejo ◽  
Amanda Varela ◽  
S. Joseph Wright
Keyword(s):  
Tropical Forest ◽  
Litter Decomposition ◽  
Nutrient Release ◽  
Forest Litter ◽  
Seasonal Drought

scholarly journals Adequacy assessment of mathematical models in the dynamics of litter decomposition in a tropical forest Mosaic Atlantic, in southeastern Brazil

2015 ◽  
Vol 75 (2) ◽  
pp. 268-272
Author(s):  
FP. Nunes ◽  
QS. Garcia
Keyword(s):  
Mathematical Models ◽  
Tropical Forest ◽  
Litter Decomposition ◽  
Nonlinear Models ◽  
Biosphere Reserve ◽  
Forest Litter ◽  
Southeastern Brazil ◽  
Native Forest ◽  
Significant Difference ◽  
Convergence Problems

The study of litter decomposition and nutrient cycling is essential to know native forests structure and functioning. Mathematical models can help to understand the local and temporal litter fall variations and their environmental variables relationships. The objective of this study was test the adequacy of mathematical models for leaf litter decomposition in the Atlantic Forest in southeastern Brazil. We study four native forest sites in Parque Estadual do Rio Doce, a Biosphere Reserve of the Atlantic, which were installed 200 bags of litter decomposing with 20×20 cm nylon screen of 2 mm, with 10 grams of litter. Monthly from 09/2007 to 04/2009, 10 litterbags were removed for determination of the mass loss. We compared 3 nonlinear models: 1 – Olson Exponential Model (1963), which considers the constant K, 2 – Model proposed by Fountain and Schowalter (2004), 3 – Model proposed by Coelho and Borges (2005), which considers the variable K through QMR, SQR, SQTC, DMA and Test F. The Fountain and Schowalter (2004) model was inappropriate for this study by overestimating decomposition rate. The decay curve analysis showed that the model with the variable K was more appropriate, although the values of QMR and DMA revealed no significant difference (p> 0.05) between the models. The analysis showed a better adjustment of DMA using K variable, reinforced by the values of the adjustment coefficient (R2). However, convergence problems were observed in this model for estimate study areas outliers, which did not occur with K constant model. This problem can be related to the non-linear fit of mass/time values to K variable generated. The model with K constant shown to be adequate to describe curve decomposition for separately areas and best adjustability without convergence problems. The results demonstrated the adequacy of Olson model to estimate tropical forest litter decomposition. Although use of reduced number of parameters equaling the steps of the decomposition process, no difficulties of convergence were observed in Olson model. So, this model can be used to describe decomposition curves in different types of environments, estimating K appropriately.

Investigating diversity dependence of tropical forest litter decomposition: experiments and observations from Central Africa

2011 ◽  
Vol 23 (2) ◽  
pp. 223-235 ◽  
Author(s):  
Kelvin S.-H. Peh ◽  
Bonaventure Sonké ◽  
Hermann Taedoung ◽  
Oliver Séné ◽  
Jon Lloyd ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Litter Decomposition ◽  
Central Africa ◽  
Forest Litter ◽  
Decomposition Experiments

scholarly journals Comparative Dynamics of Nutrient Release through Litter Decomposition in Eucalyptus grandis Hill ex Maiden and Pinus taeda L. Stands

Forests ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1227
Author(s):  
Andrés Baietto ◽  
Andrés Hirigoyen ◽  
Jorge Hernández ◽  
Amabelia del Pino
Keyword(s):  
Pinus Taeda ◽  
Litter Decomposition ◽  
Nutrient Recycling ◽  
Eucalyptus Grandis ◽  
Nutrient Release ◽  
Forest Litter ◽  
Low Fertility ◽  
Native Pastures ◽  
K Concentration ◽  
Pinus Taeda L

The installation of commercial stands with exotic forest species on low fertility soils originally covered by native pastures is an unusual situation worldwide. In recent years, the area occupied by forest systems designed for pulp or wood production with immediate replanting has increased strongly in the Pampean region of South America. In this context, the study of nutrient recycling from forest litter decomposition acquires particular relevance. This work seeks to evaluate and compare the nutrient release from the decomposition of forest litter produced by 14-year-old Eucalyptus grandis Hill ex Maiden and Pinus taeda L. stands and test the applicability of a new sampling methodology in the nutrient recycling assessment. For two years, the evaluation of N, P, K, Ca, Mg, Fe, Mn, Cu and Zn dynamics during litter decomposition was carried out. In general, K concentration decreased through decomposition, meanwhile, all other nutrients showed some degree of immobilization, but this was counteracted by biomass loss for most of them. This mainly resulted in net nutrient release from litter. A higher release rate of all nutrients from P. taeda forest litter compared to E. grandis, with the exception of Mn, was verified. Fe immobilization was observed in both species showing a higher immobilization rate in E. grandis compared to P. taeda. Finally, Zn exhibited immobilization processes in E. grandis and releases in P. taeda. This might suggest higher temporal and quantitative availability of nutrients in P. taeda, due their faster return to the soil. These findings could be relevant in the development of models for sustainable management, adapting the demand for nutrients to the supply during forest rotations.

Effects of nitrogen deposition on litter decomposition and nutrient release mediated by litter types and seasonal change in a temperate forest

2020 ◽  
Vol 100 (1) ◽  
pp. 11-25 ◽  
Author(s):  
Guoyong Yan ◽  
Xiongde Dong ◽  
Binbin Huang ◽  
Honglin Wang ◽  
Ziming Hong ◽  
...  
Keyword(s):  
Mass Loss ◽  
Litter Decomposition ◽  
Nutrient Release ◽  
N Deposition ◽  
Pinus Koraiensis ◽  
N Addition ◽  
Entire Study ◽  
Mixed Litter ◽  
Negative Effect ◽  
Four Levels

We conducted a field experiment with four levels of simulated nitrogen (N) deposition (0, 2.5, 5, and 7.5 g N m−2 yr−1, respectively) to investigate the response of litter decomposition of Pinus koraiensis (PK), Tilia amurensis (TA), and their mixture to N deposition during winter and growing seasons. Results showed that N addition significantly increased the mass loss of PK litter and significantly decreased the mass loss of TA litter throughout the 2 yr decomposition processes, which indicated that the different responses in the decomposition of different litters to N addition can be species specific, potentially attributed to different litter chemistry. The faster decomposition of PK litter with N addition occurred mainly in the winter, whereas the slower decomposition of TA litter with N addition occurred during the growing season. Moreover, N addition had a positive effect on the release of phosphorus, magnesium, and manganese for PK litter and had a negative effect on the release of carbon, iron, and lignin for TA litter. Decomposition and nutrient release from mixed litter with N addition showed a non-additive effect. The mass loss from litter in the first winter and over the entire study correlated positively with the initial concentration of cellulose, lignin, and certain nutrients in the litter, demonstrating the potential influence of different tissue chemistries.

scholarly journals Nitrogen Addition Significantly Affects Forest Litter Decomposition under High Levels of Ambient Nitrogen Deposition

PLoS ONE ◽  
2014 ◽  
Vol 9 (2) ◽  
pp. e88752 ◽  
Author(s):  
Li-hua Tu ◽  
Hong-ling Hu ◽  
Gang Chen ◽  
Yong Peng ◽  
Yin-long Xiao ◽  
...  
Keyword(s):  
Nitrogen Deposition ◽  
Litter Decomposition ◽  
Forest Litter ◽  
Nitrogen Addition

scholarly journals Litter mixing effect on decomposition rate and nutrient release: low quality leaves of coastal species

2021 ◽  
Author(s):  
Lili Wei
Keyword(s):  
Litter Decomposition ◽  
Decomposition Rate ◽  
Nutrient Release ◽  
Additive Effect ◽  
Nutrient Concentrations ◽  
Mangrove Species ◽  
Litter Bag ◽  
Litter Mixtures ◽  
Coastal Species ◽  
Litter Mixing

Coastal wetlands are among the most carbon-rich ecosystems in the world. Litter decomposition is a major process controlling soil carbon input. Litter mixing has shown a non-additive effect on the litter decomposition of terrestrial plants particularly of those species having contrasting litter quality. But the non-additive effect has been rarely tested in coastal plants which generally having low-quality litters. We selected three common mangrove species and one saltmarsh species, co-occurring in subtropical coasts, to test whether the non-additive effect occurs when the litters of these coastal species mixing together. We are also concerned whether the changes in the decomposition rate of litter will affect the nutrient contents in waters. A litter-bag experiment was carried out in a glasshouse with single and mixed leaf litters. A non-additive effect was observed in the litter mixtures of mangrove species Aegiceras corniculatum vs. Kandelia obovata (antagonistic) and A. corniculatum vs. Avicennia marina (synergistic). Whereas, the mixture of A. corniculatum (mangrove species) and Spartina alterniflora (saltmarsh species) showed an additive effect. The strength of the non-additive effect was unrelated to the initial trait dissimilarity of litters. Instead, the decomposition rate and mass remaining of litter mixtures were strongly related to the carbon concentrations in litters. Nutrient content in waters was dependent on the decomposition rate of litter mixtures but not on the initial nutrient concentrations in litters. Despite the behind mechanisms were not yet revealed by the current study, these findings have improved our understanding of the litter decomposition of coastal species and the consequent nutrient release.

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