نتایج جستجو برای: litterfall dynamic

تعداد نتایج: 406508  

2003
Jose Manuel Maass James M. Vose Wayne T. Swank Angelina Martinez-Yrizar

Light canopy transmittance and the Beer-Lambert equation were utilized to assess monthly leaf area index (LAI) of a tropical deciduous forest ecosystem on the west coast of Mexico. The light transmittance coefficient (k) was obtained by analyzing vertical leaf and light distribution in the forest canopy. An independent LAI estimate was obtained using litterfall data. The calculated k value was ...

Journal: :Ecology 2008
Adam D Kay Josh Mankowski Sarah E Hobbie

Fires can generate spatial variation in trophic interactions such as insect herbivory. If trophic interactions mediated by fire influence nutrient cycling, they could feed back on the more immediate consequences of fire on nutrient dynamics. Here we consider herbivore-induced effects on oak litter quality and decomposition within a long-term manipulation of fire frequency in central Minnesota, ...

Journal: :SMCC Higher Education Research Journal 2020

2006
antonia. caritat

From 1996 to 2002 the monthly litterfall in a Quercus suber forest ecosystem of Montseny (NE Spain) was recorded and its relationship to meteorological variables was statistically analysed. The average annual production (477 g m−2 yr−1) was similar to those found in other Mediterranean evergreen forests with relatively high rainfall. The main components were the leaves (55% of the total biomass...

Journal: :international journal of environmental research 0
z. miletić institute of forestry, department for silviculture, plantation establishment and forest ecology, belgrade, serbia m. knežević faculty of forestry, department of forest ecology, belgrade, serbia s. stajić institute of forestry, department for silviculture, plantation establishment and forest ecology, belgrade, serbia o. košanin faculty of forestry, department of forest ecology, belgrade, serbia i. đorđević institute of forestry, department for silviculture, plantation establishment and forest ecology, belgrade, serbia

the effect of european black alder (alnus glutinosa l.) on the contents of carbon and nitrogen,exchangeable base cations, and plant available forms of phosphorus in the reclaimed mine soils formed bywaste deposition from opencast lignite mines was researched in central serbia. it was concluded that thegreatest part of dead organic residues reaching the soil under european black alder monocultur...

2001
ADRIEN C. FINZI ANDREW S. ALLEN EVAN H. DELUCIA DAVID S. ELLSWORTH WILLIAM H. SCHLESINGER

Increases in tree biomass may be an important sink for CO2 as the atmospheric concentration continues to increase. Tree growth in temperate forests is often limited by the availability of soil nutrients. To assess whether soil nutrient limitation will constrain forest productivity under high atmospheric CO2, we studied the changes in forest litter production and nutrient cycling in a maturing s...

Journal: :Journal Of Geophysical Research: Biogeosciences 2021

Litterfall is a good indicator of overall forest functions in ecosystems. Globally, litterfall has been extensively investigated, however, there lack long-term data analysis to show the various components relation environmental factors on monthly and yearly scales. Here, (May–October) annual (1981–2018) including leaves, twigs, bark, reproductive, miscellaneous fractions were collected mixed ma...

Journal: :Journal of forest science 2023

Litterfall of silver fir contributes to development forest floor similarly like Norway spruce litterfall does. The nutrient return soil can be intensified by mixing these conifers with other tree species whose effects on are positive; our study deals European rowan. aimed at firs and rowans in alternating rows (Fi-Ro) compared the monospecific plantation (Fi) two former meadow sites stan...

پایان نامه :0 1392

it is definitely necessary to understand the concept and behavior of causation of life insurance policies and its determinants for insurance managers, regulators, and customers. for insurance managers, the profitability and liquidity of insurers can be increasingly influenced by the number of causation through costs, adverse selection, and cash surrender values. therefore, causation is a materi...

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