نتایج جستجو برای: litter

تعداد نتایج: 13194  

Journal: :Ecology 2007
Antoine Lecerf Geta Risnoveanu Cristina Popescu Mark O Gessner Eric Chauvet

In view of growing interest in understanding how biodiversity affects ecosystem functioning, we investigated effects of riparian plant diversity on litter decomposition in forest streams. Leaf litter from 10 deciduous tree species was collected during natural leaf fall at two locations (Massif Central in France and Carpathians in Romania) and exposed in the field in litter bags. There were 35 s...

Journal: :Ecology 2009
Tana E Wood Deborah Lawrence Deborah A Clark Robin L Chazdon

Litter-induced pulses of nutrient availability could play an important role in the productivity and nutrient cycling of forested ecosystems, especially tropical forests. Tropical forests experience such pulses as a result of wet-dry seasonality and during major climatic events, such as strong El Niños. We hypothesized that (1) an increase in the quantity and quality of litter inputs would stimu...

2016
Kayleigh J. Wyles Sabine Pahl Katrina Thomas Richard C. Thompson

The beneficial effects of blue environments have been well documented; however, we do not know how marine litter might modify these effects. Three studies adopted a picture-rating task to examine the influence of litter on preference, perceived restorative quality, and psychological impacts. Photographs varied the presence of marine litter (Study 1) and the type of litter (Studies 2 and 3). The...

2009
M. Tuomi T. Thum H. Jarvinen S. Fronzek B. Berg M. Harmon J. A. Trofymow S. Sevanto J. Liski

Litter decomposition is an important process in the global carbon cycle. It accounts for most of the heterotrophic soil respiration and results in formation of more stable soil organic carbon (SOC) which is the largest terrestrial carbon stock. Litter decomposition may induce remarkable feedbacks to climate change because it is a climate-dependent process. To investigate the global patterns of ...

2005
Jake F. Weltzin Jason K. Keller Scott D. Bridgham J. Pastor P. B. Allen J. Chen

The accumulation of litter or thatch can affect plant community composition by affecting the temperature, nutrient availability, and light availability of the soil environment, thereby forming a potentially important linkage between recent productivity and current ecosystem processes. To investigate the importance of litter on a fen peatland plant community, we conducted a litter addition and r...

2009
JOHN S. KOMINOSKI CATHERINE M. PRINGLE

1. Understanding relationships between resource and consumer diversity is essential to predicting how changes in resource diversity might affect several trophic levels and overall ecosystem functioning. 2. We tested for the effects of leaf litter species diversity (i.e. litter mixing) on litter mass remaining and macroinvertebrate communities (taxon diversity, abundance and biomass) during brea...

Journal: :The Science of the total environment 2006
Michael B Jenkins Dinku M Endale Harry H Schomberg Ronald R Sharpe

The application of poultry litter to agricultural fields can provide plant nutrients for crops and forage production, but fecal bacteria and the sex hormones estradiol and testosterone are components of litter that can be detrimental to the environment. Our objective was to determine if applications of poultry litter to small watersheds would contribute to the load of fecal bacteria and sex hor...

Journal: :Journal of environmental quality 2013
A Adeli H Tewolde M W Shankle T R Way J P Brooks M R McLaughlin

Surface broadcast of broiler litter to no-till row crops exposes the litter and its nutrients to risks of loss in runoff water and volatilization and may limit the potential benefit of litter to the crops. Subsurface banding of litter could alleviate these risks. A field study was conducted in 2008 and 2009 on an upland Falkner silt loam soil to determine the effect of broiler litter placement ...

Journal: :iranian journal of basic medical sciences 0
atefeh noroozi department of animal sciences, college of agriculture, shiraz university, shiraz, iran mohammad reza jafarzadeh shirazi department of animal sciences, college of agriculture, shiraz university, shiraz, iran mohammad javad zamiri department of animal sciences, college of agriculture, shiraz university, shiraz, iran amin tamadon infertility research center, shiraz university of medical sciences, shiraz, iran transgenic technology research center, shiraz university of medical sciences, shiraz, iran amir akhlaghi department of animal sciences, college of agriculture, shiraz university, shiraz, iran nader tanideh department of pharmacology, school of medicine, shiraz university of medical sciences, shiraz, iran biotechnology institute, college of agriculture, shiraz university, shiraz, iran

objective(s): the effect of litter size and suckling intensity on the expression of kiss-1 mrna in the arcuate nucleus (arc) of rats were evaluated. materials and methods: thirty two pregnant and four non-lactating ovariectomized (as control group) rats were used in this experiment. lactating rats were allotted to eight equal groups. in three groups, litter size was adjusted to 5, 10, or 15 pup...

2013
Samantha K. Chapman Gregory S. Newman Stephen C. Hart Jennifer A. Schweitzer George W. Koch

To what extent microbial community composition can explain variability in ecosystem processes remains an open question in ecology. Microbial decomposer communities can change during litter decomposition due to biotic interactions and shifting substrate availability. Though relative abundance of decomposers may change due to mixing leaf litter, linking these shifts to the non-additive patterns o...

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