نتایج جستجو برای: leaf litter

تعداد نتایج: 96434  

2006
Dennis M. Gray John Dighton

Temperature dependant mineralization dynamics during fire of litter species characteristic of the New Jersey pine barrens was determined. Senescent leaf material of pitch pine (Pinus rigida), white oak (Quercus alba) and black huckleberry (Gaylusssacia baccata) were collected at the time of abscission; sorted, ground and oven-dried at 70 8C. Replicate samples were then heated for 2 h at: 70, 10...

Journal: :ecopersia 0
javad mirzaei assistant professor, faculty of agriculture, university of ilam, ilam, iran mostafa moradi assistant professor, faculty of natural resources and environment, behbahan khatam al-anbia university of technology, behbahan, iran farzad seyedi m.sc. in environmental sciences, ilam provincial directorate of environmental protection, ilam, iran

carbon sequestration in soil, leaf and litter of three tree species, viz. eucalyptuscamaldulensis, prosopisjuliflora and ziziphus spina-christi, plantation was investigated in the dehloran city, iran. results showed that the amount of sequestered c in leaf, litter and soil was significantly different among these species. the highest amount of sequestrated c was in leaf and the lowest amount in ...

Journal: :Journal of experimental marine biology and ecology 2001
Zhou

The responses of major meiofaunal taxa and nematode species assemblage to the decaying leaf litter of the mangrove Kandelia candel were investigated through a field colonization experiment in subtropical Hong Kong. Sixty-four replicate azoic and organic-free sediment cores were treated with leaf litter additions of 0x, 0.5x, 1x and 2x natural sediment organic concentration, respectively, and re...

Journal: :Anais da Academia Brasileira de Ciencias 2011
Carlos F D Rocha Davor Vrcibradic Mara C Kiefer Carla C Siqueira Mauricio Almeida-Gomes Vitor N T Borges Júnior Fábio H Hatano Angélica F Fontes Jorge A L Pontes Thais Klaion Lívia O Gil Monique Van Sluys

We studied the leaf-litter frog community of Estação Ecológica Estadual Paraíso, in Guapimirim, Rio de Janeiro State, southeastern Brazil. Herein we combined three sampling methods (large plots, visual encounter surveys and pit-fall traps) to present data on species composition, richness, relative abundance and densities. The local assemblage of frogs associated to the leaf-litter was composed ...

Journal: :Neotropical entomology 2011
Paulo S D Silva A G D Bieber M M Corrêa I R Leal

The search for factors shaping leaf-litter ant communities has received particular attention due to the essential role of these insects in many ecological processes. Here, we aimed to investigate how the number of leaves and leaf morphotypes affect the litter-ant species density at forest edge and interior in an Atlantic Forest remnant in the state of Alagoas, Brazil. This study was developed b...

2007
John S. Kominoski Paul A. Moore Robert G. Wetzel Nancy C. Tuchman

Elevated atmospheric CO2 increases plant C fixation, and much of the soluble C content of deciduous leaf litter entering streams is leached as dissolved organic C (DOC). The effects of DOC from trembling aspen (Populus tremuloides Michaux) leaf litter grown under elevated (ELEV 1⁄4 720 ppm) and ambient (AMB1⁄4 360 ppm) CO2 on stream periphyton were measured during a 35-d experiment in outdoor a...

Journal: :Environmental science & technology 2010
Alexander W Cheesman Benjamin L Turner Patrick W Inglett K Ramesh Reddy

The microbially mediated transformation of detrital P entering wetlands has important implications for the cycling and long-term sequestration of P in wetland soils. We investigated changes in P forms in sawgrass (Cladium jamaicense Crantz) and cattail (Typha domingensis Pers.) leaf litter during 15 months of decomposition at two sites of markedly different nutrient status within a hard-water s...

Journal: :Molecular ecology 2013
Jennifer Kerekes Michael Kaspari Bradley Stevenson R Henrik Nilsson Martin Hartmann Anthony Amend Thomas D Bruns

Microbial communities play a major role in terrestrial ecosystem functioning, but the determinates of their diversity and functional interactions are not well known. In this study, we explored leaf litter fungal diversity in a diverse Panama lowland tropical forest in which a replicated factorial N, P, K and micronutrient fertilization experiment of 40 × 40 m plots had been ongoing for nine yea...

2005
Heraldo L. Vasconcelos William F. Laurance

Amazonian forest fragments and secondgrowth forests often differ substantially from undisturbed forests in their microclimate, plant-species composition, and soil fauna. To determine if these changes could affect litter decomposition, we quantified the mass loss of two contrasting leaf-litter mixtures, in the presence or absence of soil macroinvertebrates, and in three forest habitats. Leaf-lit...

2013
Corey L. Pray Weston H. Nowlin Michael J. Vanni

Many freshwater ecosystems receive allochthonous resource subsidies from adjacent terrestrial environments. In eastern North American forests, geographic broods of periodical cicadas emerge every 13 to 17 y to breed, and local abundances can sometimes be .300 individuals/m. Most individuals avoid predation, senesce after breeding, and become a resource pulse for forest ecosystems; some cicada c...

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