Bibliografie tematiche / Litterfall

Letteratura scientifica selezionata sul tema "Litterfall"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 20 febbraio 2023

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Articoli di riviste sul tema "Litterfall"

1

Thomas, K., GA Chilvers e RH Norris. "Short Communication: Litterfall in riparian and ajacent forest zones near perennial upland stream in the Australian Capital Territory". Marine and Freshwater Research 43, n. 2 (1992): 511. http://dx.doi.org/10.1071/mf9920511.

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Abstract (sommario):
Litterfall into Lees Creek from eucalypt-dominated riparian vegetation and litterfall in adjacent eucalypt forest was measured monthly for 2.5 years. Mean annual litterfall for riparian vegetation was 4.52 t ha-1, of which overstorey leaf fall accounted for 44%, understorey leaf fall 12.5%, twigs 16.75%, bark 12% and miscellaneous material 14.75%. Mean annual litterfall in adjacent forest was 4.20 t ha-1, of which overstorey leaf fall accounted for 52.3%, understorey leaf fall 2.9%, twigs 18%, bark 12% and miscellaneous material 14.8%. More than 50% of all litterfall occurred from December to March with leaf fall the largest component (60-70%) during this period. Minimum litterfall was in winter with twigs contributing up to 40% of total litterfall during this period. Timing of litterfall into Lees Creek and the adjacent forest is similar to litterfall in other Australian forests and to litterfall from sclerophyllous vegetation into streams of the south-western Cape of South Africa.
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2

Yang, Yulian, Honglin Yang, Qiang Wang, Qing Dong, Jiaping Yang, Lijun Wu, Chengming You, Jinyao Hu e Qinggui Wu. "Effects of Two Management Practices on Monthly Litterfall in a Cypress Plantation". Forests 13, n. 10 (27 settembre 2022): 1581. http://dx.doi.org/10.3390/f13101581.

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Optimizing stand structure can enhance plantation forest ecosystem service functions by regulating litterfall patterns; however, the effects of close-to-nature management on litterfall production remain unclear. Here, we selected three cypress (Cupressus funebris) plantations, including one using the practice of strip filling (SF), one using the practice of ecological thinning (ET), and one pure cypress plantation without any artificial interference. The production of total litterfall and its components (leaf, twig, reproductive organ and miscellaneous litterfall) were investigated monthly over one year from September 2019 to August 2020. Compared with that of the pure plantation, the total annual litterfall production of the SF and ET plantations decreased significantly by 10.8% and 36.44%, respectively. The annual production of leaf and reproductive organ litter was similar to that of total litterfall, but that of twig and miscellaneous litter was higher in the SF and ET plantations than in the pure plantation. Moreover, total, leaf and reproductive organ litterfall production displayed unimodal dynamics regardless of plantation, although the peaks of reproductive organ litter production occurred in different months. In contrast, the production of twig litter showed bimodal dynamics in the pure plantation, while unimodal and irregular dynamics were observed in the plantations with ET and SF, respectively. Additionally, insignificant differences in the isometric growth index of leaf litter and total litterfall were observed. The allometric indices of twig litterfall versus total litterfall, reproductive organ litterfall versus total litterfall, and leaf litterfall versus twig litterfall were higher in the plantations with SF and ET than in the pure plantation. Redundancy analysis (RDA) revealed that diameter at breast height and air temperature were the most important factors shaping the annual and monthly production of litterfall, respectively. These results provide efficient data to support the rectification of the material circulation of cypress plantations and their future management.
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3

Dellenbaugh, Mary, Mark J. Ducey e James C. Innes. "Double sampling may improve the efficiency of litterfall estimatesContribution No. 2335 of the New Hampshire Agricultural Experiment Station, Durham, N.H." Canadian Journal of Forest Research 37, n. 4 (aprile 2007): 840–45. http://dx.doi.org/10.1139/x06-274.

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The effort required for an extensive litterfall measurement campaign can be prohibitive. We propose a double sampling approach, in which a large set of traps is used in each stand to estimate total litterfall, and only a subset of these traps is sorted to the relevant components. We examine its feasibility using data from a regional litterfall study of eastern white pine ( Pinus strobus L.), in which the variables of interest were biomass of foliar litterfall from pine and nitrogen content of foliar litterfall from all vegetation. Double sampling was more efficient than simple random sampling but only if every trap received a rapid presorting to remove twigs and cones. The optimal strategy when pine foliar litterfall biomass was the target variable was to conduct full sorting on 33% of the traps. When foliar litterfall N was the target, sorting only 20% of the traps was optimal. Holding time costs constant, the variance of estimated pine foliar litterfall biomass could be reduced by 18%, whereas that for foliar litterfall N could be reduced by 49%. Alternately, when variance was held constant, the time cost could be reduced by 17% for pine foliar litterfall biomass or 44% for foliar litterfall N.
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4

Jia, Bingrui, Hongru Sun, Wenying Yu e Guangsheng Zhou. "Quantifying the interannual litterfall variations in China’s forest ecosystems". Journal of Plant Ecology 13, n. 3 (14 marzo 2020): 266–72. http://dx.doi.org/10.1093/jpe/rtaa010.

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Abstract Aims Litterfall is a key parameter in forest biogeochemical cycle and fire risk prediction. However, considerable uncertainty remains regarding the litterfall variations with forest ages. Quantifying the interannual variation of forest litterfall is crucial for reducing uncertainties in large-scale litterfall prediction. Methods Based on the available dataset (N = 318) with continuous multi-year (≥2 years) measurements of litterfall in Chinese planted and secondary forests, coefficient of variation (CV), variation percent (VP), and the ratio of next-year litterfall to current-year litterfall were used as the indexes to quantify the interannual variability in litterfall. Important Findings The interannual variations of litterfall showed a declining trend with increasing age from 1 to 90 years. The litterfall variations were the largest in 1–10 years (mean CV = 23.51% and mean VP = −28.59% to 20.89%), which were mainly from tree growth (mean ratio of next-year to current-year = 1.20). In 11–40 years, the interannual variations of litterfall gradually decreased but still varied widely, mean CV was ~18% and mean VP ranged from −17.69% to 21.19%. In 41–90 years, the interannual variations minimized to 8.98% in mean CV and ~8% in mean VP. As a result, forest litterfall remained relatively low and constant when stand age was larger than 40 years. This result was different from the previous assumptions that forest litterfall reached relatively stable when stand age was larger than 30, 20 or even 15 years. Our findings can improve the knowledge about forest litter ecology and provide the groundwork for carbon budget and biogeochemical cycle models at a large scale.
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5

Sinaga, Tonggo. "Study Productivity And Decomposition Litterfall In Sibolangit Forest, Deli Serdang To Support Field Trip Plantation Ecology". JURNAL BIOSAINS 1, n. 3 (20 gennaio 2016): 57. http://dx.doi.org/10.24114/jbio.v1i3.2924.

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The research was conducted in mountain rain forest of Sibolangit, Deli Serdang, Northen Sumatera. The objectives of this research are to know litter fall productivity, decomposition and litterfall nutrients. Litterfall is the fallen leaves, twigs, flowers and fruits to forest-floor, which one of the input of nutrients to anorganic sril. This input is one of the nutrients cycling to forest ecosystem and the other form atmosfer and a lot of animals. Based on available data on 20 traps, litterfall productivity 5,91 gr/m2/week or 3073,2 kg/ha/year in high topography. Litterfall productivity 4,92gr/m2/week or 2558,4 kg/ha/year in low topography. Litterfall decomposition (lossed of weight) about 25,48% in 30 days ( 1 month ) for meranti ( Shorea sp ) and leaves of Ficus sp had lossed of weight about 8,09% in 30 days ( 1 month ). Ration C/N (Carbon-Nitrogen) litterfall and soil moisture made differrent litterfall decomposition (lossed of weight) Keywords : Productivity, Decomposition, Litterfall, Productivity.
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6

Ferrari, James B. "Fine-scale patterns of leaf litterfall and nitrogen cycling in an old-growth forest". Canadian Journal of Forest Research 29, n. 3 (1 marzo 1999): 291–302. http://dx.doi.org/10.1139/x98-198.

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Spatial patterns of litterfall and soil nitrogen (N) mineralization were investigated in an old growth hemlock-hardwood forest to test the hypothesis that the lignin/N ratio of litterfall is negatively correlated with soil N availability. Litterfall was measured at 50 small subplots on a 7.2-ha mapped plot in Sylvania Wilderness Area, Michigan, where there is pronounced patchiness of species in the canopy. Nitrogen mineralization and nitrification were measured concurrently at the subplots using buried-bag incubations. Total aboveground litterfall was 3723 kg·ha-1 per year with leaf litterfall contributing 69% of the total, and N mineralization was 68.0 kg·ha-1 per year. The lignin/N ratios of leaf litter and total litterfall were negatively correlated with soil N mineralization and nitrification at the 50 subplots. Nitrogen mineralization rates, especially percent nitrification, were higher where basswood and sugar maple litterfall dominated and lower where hemlock litterfall was high, demonstrating the importance of litterfall and leaf litter chemistry to soil N pattern on a fine spatial scale. The effect of leaf litter chemistry on soil N may be a positive feedback mechanism that maintains the landscape-scale canopy mosaic at Sylvania.
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7

Vitousek, Peter M., Grant Gerrish, Douglas R. Turner, Lawrence R. Walker e Dieter Mueller-Dombois. "Litterfall and nutrient cycling in four Hawaiian montane rainforests". Journal of Tropical Ecology 11, n. 2 (maggio 1995): 189–203. http://dx.doi.org/10.1017/s0266467400008634.

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ABSTRACTThe mass of fine litterfall and nutrient circulation through litterfall were determined in four Melrosideros polymorpha/Cibotium spp.-dominated rainforests that differed in substrate age, parent material texture and annual precipitation on Kilauea and Mauna Loa volcanoes on the island of Hawaii. Three of the sites had rates of litterfall of 5.2 Mg ha−1 y−1; the fourth, which was on the most fertile soil, produced 7.0 Mg ha−1 y−1 of litterfall with higher concentrations of nitrogen and phosphorus. Tree ferns of the genus Cibotium cycled relatively large amounts of nitrogen, phosphorus and potassium through litterfall; their contribution to nutrient circulation was disproportionate to their mass in the forest, or in litterfall. The forest on the youngest substrate, which also had the lowest concentrations of nitrogen in litterfall, was fertilized with complete factorial combinations of nitrogen, phosphorus and a treatment consisting of all other plant nutrients. Additions of nitrogen increased the quantity and nitrogen concentration in litterfall during the second year following the initiation of fertilization, while no other treatment had a significant effect. Additions of nitrogen had no effect on litterfall mass or nutrient concentrations in the most nutrient-rich site.
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8

Edmonds, Robert L., e Georgia LD Murray. "Overstory litter inputs and nutrient returns in an old-growth temperate forest ecosystem, Olympic National Park, Washington". Canadian Journal of Forest Research 32, n. 4 (1 aprile 2002): 742–50. http://dx.doi.org/10.1139/x01-227.

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Overstory litterfall rates and nutrient returns were determined in an old-growth temperate rainforest watershed in the Hoh River valley, Olympic National Park, Washington. Litter was sorted into green needles, senescent needles, fine wood, reproductive, and miscellaneous litter (mostly arboreal lichens and mosses). Understory and coarse woody debris inputs were not determined. Total annual overstory litterfall averaged 3594 kg·ha–1 and varied among the six plant communities in the watershed. There was a trend for litterfall to be higher in the upper watershed; elevations ranged from 180 to 850 m. Needles provided the greatest amount of litterfall (60%) with woody litter and other material averaging 18 and 22%, respectively. Highest senescent needle litterfall occurred from July to October, but highest woody litterfall was from January to April. Green needles provided only 3% of annual needle litterfall. Green and senescent needle litterfall were related to western hemlock (Tsuga heterophylla (Raf.) Sarg.) basal area, suggesting that this shade-tolerant species was the greatest contributor to needle litterfall. The following quantities (kg·ha–1) of nutrients were returned to the forest floor annually: Ca, 26.8; N, 24.6; K, 4.0; Mg, 3.0; P, 2.9; Mn, 1.7; and Na, 1.2.
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9

Kulmann, Matheus Severo de Souza, Grasiele Dick e Mauro Valdir Schumacher. "Litterfall and Accumulated Nutrients in Pinus taeda Plantation and Native Forest in Southern Brazil". Forests 12, n. 12 (17 dicembre 2021): 1791. http://dx.doi.org/10.3390/f12121791.

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Abstract (sommario):
The dynamics of the production, chemical composition, and accumulated nutrients in litterfall are essential to understand the availability of nutrients and, consequently, possible gains in productivity in different forest types. Thus, the objective of the present study was to evaluate the litterfall and the accumulated nutrients in litterfall in a Pinus taeda plantation and native forest from southern Brazil. Two forest types: (i) an eight-year-old Pinus taeda L. plantation; and (ii) a native forest fragment, located in southern Brazil, were studied for four years. The monthly and annual litterfall production, chemical composition, accumulated nutrients, and nutrient use efficiency of the litterfall were evaluated. The Pinus taeda plantation showed higher values of leaves/needles litterfall and N, P, K, Ca and Mg use efficiency. This demonstrates that Pinus taeda plantations have a high production of needle biomass, which, in turn, has increased cell division, favoring the entry of these nutrients into the soil via decomposition. Our results show that total litterfall production did not significantly influence the accumulated nutrient and nutrient efficiency of litterfall, demonstrating that evaluating litterfall fractionation, such as leaves/needles, twigs and miscellaneous, is essential to understand the quantity and quality of litterfall and, thus, the nutrient cycling, which can contribute to possible silvicultural practices to be implemented, which can provide growth gains in forest types.
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10

Chave, J., D. Navarrete, S. Almeida, E. Álvarez, L. E. O. C. Aragão, D. Bonal, P. Châtelet et al. "Regional and temporal patterns of litterfall in tropical South America". Biogeosciences Discussions 6, n. 4 (27 luglio 2009): 7565–97. http://dx.doi.org/10.5194/bgd-6-7565-2009.

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Abstract. The production of aboveground soft tissue represents an important share of total net primary production in tropical rain forests. Here we draw from a large number of published and unpublished datasets (n=81 sites) to assess the determinants of litterfall variation across South American tropical forests. We show that across old-growth tropical rainforests, litterfall averages 8.61±1.91Mg/ha/yr. Secondary forests have a lower annual litterfall than old-growth tropical forests with a mean of 8.01±3.41 Mg/ha/yr. Annual litterfall shows no significant variation with total annual rainfall, either globally or within forest types. It does not vary consistently with soil type, except in the poorest soils (white sand soils), where litterfall is significantly lower than in other soil types (5.42±1.91Mg/ha/yr). Litterfall declines significantly with increasing N:P. We also study the determinants of litterfall seasonality, and find that it does not depend on annual rainfall or on soil type. However, litterfall seasonality is significantly positively correlated with rainfall seasonality. Finally, we assess how much carbon is stored in reproductive organs relative to photosynthetic organs. Mean leaf fall is 5.74±1.83 Mg/ha/yr (71% of total litterfall). Mean allocation into reproductive organs is 0.69±0.40Mg/ha/yr (9% of total litterfall). The investment into reproductive organs divided by leaf litterfall is negatively related to the N:P ratio, suggesting that on poor soils, the allocation to photosynthetic organs is prioritized over that to reproduction. Finally, we discuss the ecological and biogeochemical implications of these results.
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Più fonti

Tesi sul tema "Litterfall"

1

Thomas, Raquel Simone. "Forest productivity and resource availability in lowland tropical forests in Guyana". Thesis, University of London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325358.

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2

Zhang, Ping. "Nutrient inputs from trees via throughfall, stemflow and litterfall in an intercropping system". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0003/MQ43241.pdf.

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3

Martinez-Sanchez, Jose Luis. "Aspects of rain forest nutrition dynamics at Los Tuxtlas, Mexico". Thesis, University of Stirling, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311704.

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4

Firmino, Paulo Neves. "Análise do módulo da queda de folhada em eucaliptais no modelo 3-PG". Master's thesis, ISA/UTL, 2011. http://hdl.handle.net/10400.5/3946.

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Abstract (sommario):
Mestrado em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia
An underestimation of accumulated leaf biomass obtained with the 3-PG model when applied to a fertilization and irrigation trial of Eucalyptus globulus, conduced to install three plots in seminal high forest of Eucalyptus globulus with different ages and different site indexes to support the tendency observed in the fertilization and irrigation trial. Plots 1 and 2 were installed in a 4,5 years old eucalyptus stand, while plot 3 was installed in a 8,5 years old stand. Acummulated litterfall (dried) biomass during the period 15 March – 26 October 2011, was 1,12 Mg ha-1, 1,86 Mg ha-1 e 2,82 Mg ha-1 respectively. A higher site index distinguished results of the same age stands, while the plot at the older stand achieved superior biomass. Although the reduced number of litterfall collects, estimates obtained by 3-PG when applied to the three plots confirm the underestimation of litterfall. It’s necessary to complete this study for at least one year and possibly install more plots in different combinations of age and site index to confirm the need of improvement of the litterfall module of 3-PG model in Portugal.
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Oelbermann, Maren. "Litterfall and nutrient fluxes across the terrestrial-aquatic ecotone in a rehabilitated riparian environment". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0004/MQ43193.pdf.

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6

Coelho, Joaquim Matheus Santiago. "Serrapilheira aplicada como biomonitor na avaliação do bosque urbano do Instituto de Pesquisas Energéticas e Nucleares, São Paulo,SP". Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-24082012-162944/.

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Abstract (sommario):
Diversos processos são considerados responsáveis pela manutenção de ecossistemas. Entre eles podemos destacar a ciclagem mineral que corresponde ao ciclo dos elementos químicos que fluem entre os compartimentos bióticos, folhas e serrapilheira, e abióticos, atmosfera e solo. Esses elementos químicos se acumulam de forma ativa via absorção nos tecidos desses organismos, possibilitando sua aplicação como biomonitor na avaliação da qualidade do ambiente. Partindo dessa premissa é possível, a partir do estudo de ciclagem bioquímica de serrapilheira, conhecer a proveniência dos elementos químicos observados nas folhas diagnose das árvores. Este trabalho teve como objetivo avaliar, em escala espacial e temporal, as características da produção e sazonalidade da deposição da serrapilheira bem como estudar a composição química das folhas originadas desta serrapilheira depositada no campus do Instituto de Pesquisas Energéticas e Nucleares, IPEN, São Paulo, (RMSP) visando seu emprego como indicador do estagio de conservação ou degradação das áreas estudadas. Foram instalados 10 coletores de serrapilheira, com as dimensões de 1m x 1m, profundidade de 45 cm e 2 mm de malha, dispostos a 20 cm do solo sob a copa das árvores. Para determinação da produção de serrapilheira foram recolhidas deposições mensais nos coletores entre os meses: Fevereiro/2010 à Janeiro/2011. A determinação dos elementos químicos foi realizada utilizando as técnicas de fluorescência de raios-X por dispersão de comprimento de onda (WDXRF) e espectrometria de emissão ótica com fonte de plasma de argônio induzido (ICP-OES). Para a análise estatística dos dados foi aplicada a análise de componentes principais. A heterogeneidade temporal observada foi conseqüência da sazonalidade, interferindo na produção de serrapilheira em relação à quantidade e às porcentagens das frações. A produção de serrapilheira (base seca) durante o período de desenvolvimento da pesquisa foi de 5,86 Kg m-2 ano-1 sendo a espécie Psidiumguajara com maior índice de serrapilheira. Entre as frações, o compartimento folhas foi o mais representativo com 53,12% seguido do compartimento madeira com 26,84% e das partes reprodutivas que representou 20,04% de toda serrapilheira. Os elementos analisados foram Ca, Si, K, P, Fe Cl, Ni, Sr, Zn, Cu, Th, U, Mn, Al, Ti, Na, Mg, S e Br. Os elementos mais abundantes foram Ca, Si e K (1,8%, 0,5% e 0,6%, respectivamente) representando a composição foliar. Apesar de no passado ter havido unidades piloto de purificação de urânio e de tório, bem como considerando as atuais instalações do ciclo do combustível, foi observado que o material monitorado não se apresentou impactado quanto aos elementos químicos avaliados, e as instalações existentes não afetaram o ciclo biogeoquímico das plantas. O estudo trouxe resultados extremamente relevantes para se entender melhor em que estado se encontra o bosque em torno das instalações nucleares do IPEN/SP.
Several processes are considered responsible for ecosystems maintaining. Among them we can highlight mineral cycling that corresponds to the cycle of chemical elements that flow between the biotic compartments, leaves and litterfall, and abiotic, atmosphere and soil. These chemical elements accumulate of the active form through the absorption in the tissues of these organisms, allowing its use as a use as biomonitor in the environment quality evaluation. Based on this premise it is possible, from the biochemical cycling study of litterfall, to know the origin of chemical elements observed in diagnosis leaves of trees. The objective of this study was evaluate, on spatial and temporal scale, the characteristics of the production and seasonality of the litterfall deposition and study the chemical composition of leaves arising from this litterfall deposited on the campus of the Nuclear and Energy Research Institute IPEN, São Paulo (RMSP), aiming the employment as an indicator of the conservation or degradation stage of the studies areas. Were installed 10 litterfall collectors, measuring 1m², depth of 45 cm and 2 mm mesh, placed at 20 cm from soil under the crown of 10 trees. To determinate the production of litterfall was collected the deposition monthly during the months of February/2010 through January/2011. The determination of chemical elements was realized by X-ray fluorescence for dispersion of wavelength (WDXRF) and inductively coupled plasma optical emission spectroscopy (ICP-OES). For the statistical analysis was applied to principal component analysis. The temporal heterogeneity observed was consequence of seasonality, interfering in the litterfall production relative to the amount and percentages of fractions. The production of litterfall (dry basis), during the development of the research was 5.86 kg m² year-1, being the Psidiumguajava species with the highest litterfall rate. Among the fractions, the most representative compartment was leaves with 53.12%, followed by wood with 26.84% and reproductive parts thats represented 20.04%, of all litterfall. The elements analyzed were Ca, Si, K, P, Fe Cl, Ni, Sr, Zn, Cu, Th, U, Mn, Al, Ti, Na, Mg, S e Br. The most abundant were Ca, Si, and K (1.8%, 0.5% and 0.6 respectively) representing the leaf composition. Although in the past have been pilot units of uranium and thorium purification, as well considering the current fuel cycle installations, it was observed that monitored material not be presented impacted as to the chemical elements evaluated, and the installations existing do not affect the biogeochemical cycle of plants. The study brought highly relevant results to better understand in what state is the forest around the nuclear facilities of IPEN/SP.
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7

Acker, Marty. "Base cation concentration and content in litterfall and woody debris across a northern hardwood forest chronosequence". Lexington, Ky. : [University of Kentucky Libraries], 2006. http://lib.uky.edu/ETD/ukyfore2006t00460/Acker.pdf.

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Abstract (sommario):
Thesis (M.S.)--University of Kentucky, 2006.
Title from document title page (viewed on August 22, 2006). Document formatted into pages; contains: vi, 79 p. : ill. Includes abstract and vita. Includes bibliographical references (p. 71-78).
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8

Acker, Marty. "BASE CATION CONCNETRATION AND CONTENT IN LITTERFALL AND WOODY DEBRIS ACROSS A NORTHERN HARDWOOD FOREST CHRONOSEQUENCE". UKnowledge, 2006. http://uknowledge.uky.edu/gradschool_theses/286.

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Forest floor calcium (Ca) declines in northern hardwood forests are of interest because Ca availability may limit future forest growth. In the 1990s investigations into Ca pools and fluxes across a northern hardwood forest chronosequence showed decreases across stand age in the mass of forest floor base cations and litterfall cation concentrations. I undertook a study of factors that influence litterfall chemistry to develop a better understanding of base cation biogeochemistry in developing northern hardwood forests. Although Ca, potassium (K), and magnesium (Mg) concentrations in litterfall significantly declined with stand age, species composition and soil nutrient availability also influenced litterfall chemistry. The interplay between these factors, such as the distribution of species with different nutrient demands in areas of base cation availability or limitation, influences forest floor chemistry and may impact the time in which soil Ca depletion occurs. Additionally, I examined the quantity and qualities (species composition, decay class, size, and nutrient concentrations and contents) of woody debris across the same northern hardwood forest chronosequence. The objectives of this study were to quantify cation pools in woody debris, describe how the qualities of these woody debris pools change with stand development, and establish a baseline for long-term measurements of woody debris accumulation and chemistry with stand age. Decomposition of woody debris transfers base cations to the forest floor, and may be partially responsible for forest floor Ca gains in young stands. Calcium and K pools in woody debris were most strongly influenced by woody debris biomass, whereas Mg content was influenced by both woody debris biomass and species composition. In young stands, woody debris pools were strongly influenced by management practices during harvest. By 20 years since harvest woody debris pools reflected processes of stand development. For example, from 20 to nearly 40 years since harvest woody debris biomass and species composition was dominated by mortality of early successional species. Woody debris in more mature stands reflected small-scale stochastic disturbances including disease and single-tree mortality. Litterfall and woody debris are each components of within-stand cation cycling that will be critical to future forest growth with limited Ca availability.
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Morris, David Michael. "Biogeochemical cycling of macroelements in black spruce (Picea mariana (Mill.) B.S.P.) ecosystems, quantifying precipitation and litterfall fluxes". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0022/NQ51042.pdf.

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SANTOS, AGNI HEVEA DOS. "LANDSCAPE TRANSFORMATION OF AN URBAN FOREST IN PEDRA BRANCA MASSIF: THE LITTERFALL AS A TOOL OF ANALYSIS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33004@1.

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Abstract (sommario):
PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
A compreensão da estrutura e funcionalidades ecológicas inscritas na transformação da Mata Atlântica fluminense, compreendida por fragmentos florestais em meio à crescente urbanização, são de suma importância ao entendimento do conteúdo da paisagem via história ambiental e ecologia da paisagem. A complexidade ambiental característica da contemporaneidade geográfica instaura a coadunação de diversas abordagens tanto epistemológicas quanto metodológicas na apreensão da paisagem enquanto mosaico e resultante das multiescalares intervenções de seus elementos fundantes: estruturais e funcionais. Tais elementos encontram-se estabelecidos sob diferenciadas condições devido à orientação da encosta –vertentes soalheiras e Noruega - apresentam níveis de umidade, temperatura e precipitações diferenciadas em até 160 porcento. O estudo utiliza os parâmetros e métodos de análise ambientais como: fitossociologia, físico-química do solo, aporte, decomposição e retenção hídrica de serrapilheira na compreensão da resultante ecológica das distintas orientações e sítios topográficos. Para tanto a influência de tais variáveis na produtividade florestal foram analisadas utilizando-se 12 coletores de serrapilheira no sítio amostral da bacia do Camorim – sítio St. Agostinho, relancionando-os aos dados de pluviosidade da estação meteorológica do Riocentro (GEORIO). Foram realizadas coletas quinzenais para a produção e trimestrais para o estoque de serrapilheira durante um ano. A produção de serrapilheira na orientação NE (bacia do Camorim) foi de 10.733,80 kg.ha.ano-1 e superior em relação à orientação SW no mesmo período (Bacia do Caçambe), com 9.463,88 kg.ha.ano-1, sendo a fração folhas preponderante às demais. Os resultados sugerem a influência tanto dos usos pretéritos – legado dos carvoeiros, quilombolas e agricultores tradicionais – quanto das variáveis ecológicas – orientação de encosta, sítio topográfico, precipitação e a condição vegetacional da floresta atlântica, etc. Entretanto, os limites analíticos vão além da impossibilidade de generalizar e simplificar a paisagem. As imprecisões científicas – comuns aos diversos campos epistemológicos – inscrevem-se na abordagem co-evolutiva ao apontar os desafios da padronização e modelagem da paisagem. A transformação da Mata Atlântica mesmo que no recorte espacial (bacias do Camorim e Caçambe) adotado, não é passível de simplificação analítica e os resultados obtidos confirmam tais limitações.
The comprehension of the ecological structure and functions wrote by transformation of Atlantic Rainforest, understood as forest fragments involved by rising urbanization, is of basic importance in the understanding of the landscape by Environmental History and Landscape Ecology. The characteristically environmental complexity of the contemporary Geography settles the approaches convergence both epistemological as methodological in the landscape understandings, so as a patch and as a resultant of the multiscalar actions of their foundations elements: structurals and functionals ones. These elements are found under different conditions due to slope aspect – with different humidity, temperature and rainfall almost as 160 percent in the north slope. The currently study uses some parameters and environmental analysis as: phytosociology, soil phical-chemestry and litterfall production, decomposition and hydrological retention capacity in the understanding of the ecological resultants of the different orientation and topographic sites – soalheira and noruega slope. To investigate the influence of these variables on the forest productivity the litter dynamics were analyzed employing 12 littertraps randomly distributed at the sample site in Camorim basin – St. Agostinho site, and investigating the relation between pluviosity regime using rainfall data from GEORIO Metereological Station of Riocentro. The samples were collected at each 15 days for litter production and at three months for litter stock during one year. The litter production at NE aspect (Camorim Basin) was 10.733,80 kg.ha.ano-1 and greater than that found at Caçambe Basin (SW) - 9.463,88 kg.ha.ano-1, with leaf fraction greater than the others. The results suggest that the past uses - environmental legacy of the use of the coal collectors, quilombolas and traditional agriculture – and the ecological variables – slope aspects, topographic sites, precipitation, and rainforest vegetal condition etc. Despite that, the analytical limits bypass the impossibilities of landscape simplification. The science inaccuracies – common to all epistemological science areas – are written on the coevolutive approache when shows the challenges of landscape standardization and modeling. The rainforest transformation, even in the case of a well known adopted area (Camorim and Caçambe basins), were not easy to an analytical simplification as was demonstrated by the observed results.
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Libri sul tema "Litterfall"

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Keane, Robert E. Surface fuel litterfall and decomposition in the northern Rocky Mountains, U.S.A. [Fort Collins, CO]: U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Research Station, 2008.

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Capitoli di libri sul tema "Litterfall"

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Rodríguez, Humberto Gonzaález, Ratikanta Maiti e Ch Aruna Kumari. "Litterfall Chemistry". In Experimental Ecophysiology and Biochemistry of Trees and Shrubs, 129–31. Includes bibliographical references and index.: Apple Academic Press, 2020. http://dx.doi.org/10.1201/9780429322266-22.

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Ohkubo, Tatsuhiro, Hiroko Suzuki, Mineaki Aizawa e Kazuya Iizuka. "Movement of Radiocesium as Litterfall in Deciduous Forest". In Radiocesium Dynamics in a Japanese Forest Ecosystem, 151–58. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8606-0_8.

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Poikolainen, Jarmo, e Mikko Kuusinen. "Abundance of Epiphytic Lichens in Litterfall During 1967–1994". In Forest Condition in a Changing Environment, 171–72. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-015-9373-1_19.

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Wilcke, Wolfgang. "Litterfall in Andean Forests: Quantity, Composition, and Environmental Drivers". In The Andean Cloud Forest, 89–110. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-57344-7_5.

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Bellot, J., J. R. Sánchez, M. J. Lledó, P. Martínez e A. Escarré. "Litterfall as a measure of primary production in Mediterranean holm-oak forest". In Quercus ilex L. ecosystems: function, dynamics and management, 69–76. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-017-2836-2_6.

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Laiho, Raija, Kari Minkkinen, Jani Anttila, Petra Vávřová e Timo Penttilä. "Dynamics of Litterfall and Decomposition in Peatland Forests: Towards Reliable Carbon Balance Estimation?" In Wastewater Treatment, Plant Dynamics and Management in Constructed and Natural Wetlands, 53–64. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-8235-1_6.

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Bergmann, C., T. Fischer e R. F. Hüttl. "Seasonal variability of organic matter and N input with litterfall in Scots pine stands". In Nutrients in Ecosystems, 177–86. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9022-8_11.

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Victoria, Diego, e Rodà Ferran. "Litterfall Responses to Increased availability of Water, Nitrogen and Phosphorus in a Holm oak Forest". In Responses of Forest Ecosystems to Environmental Changes, 673–74. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2866-7_110.

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Klyashtorin, A. L. "Peculiarities of 137Cs Vertical Migration in Pine Ecosystem With Stem Flow, Throughfall, Litterfall, and Infiltration". In Contaminated Forests, 77–84. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4694-4_8.

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Berg, B., e P. Gerstberger. "Element Fluxes with Litterfall in Mature Stands of Norway Spruce and European Beech in Bavaria, South Germany". In Ecological Studies, 271–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-06073-5_16.

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Atti di convegni sul tema "Litterfall"

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Nurhanim, M. N., e W. A. Wan Juliana. "Temporal variation of vegetation litterfall and oil characteristics at Tasik Chini Biosphere Reserve, Pahang". In THE 2013 UKM FST POSTGRADUATE COLLOQUIUM: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2013 Postgraduate Colloquium. AIP Publishing LLC, 2013. http://dx.doi.org/10.1063/1.4858688.

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Sainte-Marie, J., A. Henrot, M. Barrandon, Y. Nouvellon, O. Roupsard, J. P. Laclau e L. Saint-Andre. "Modeling the environmental and seasonal influence on canopy dynamic and litterfall of even-aged forest ecosystems by a model coupling growth & yield and process-based approaches". In 2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications (PMA). IEEE, 2012. http://dx.doi.org/10.1109/pma.2012.6524853.

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Rapporti di organizzazioni sul tema "Litterfall"

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Keane, Robert E. Surface fuel litterfall and decomposition in the northern Rocky Mountains, U.S.A. Ft. Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2008. http://dx.doi.org/10.2737/rmrs-rp-70.

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Grizzard, T. Henderson, G.S. Clebsch, E. Seasonal Nutrient Dynamics of Foliage and Litterfall on Walker Branch Watershed, a Deciduous Forest Ecosystem. Office of Scientific and Technical Information (OSTI), gennaio 1999. http://dx.doi.org/10.2172/814435.

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