نتایج جستجو برای: litter and soil0

تعداد نتایج: 16828864  

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...

2009
Kelly S. Ramirez Christian L. Lauber Noah Fierer K. S. Ramirez C. L. Lauber N. Fierer

Substantial amounts of volatile organic compounds (VOCs) can be released during decomposition and these compounds can affect atmospheric chemistry, belowground processes, and the structure of microbial communities in litter and soil. However, we have a limited understanding of the types, quantities and ecological impacts of VOCs emitted from litter. Here we used a closed flow-through system and...

Journal: :Journal of environmental quality 2015
Sarah A Doydora Dorcas Franklin Peizhe Sun Miguel Cabrera Aaron Thompson Kimberly Love-Myers John Rema Vaughn Calvert Spyros G Pavlostathis Ching-Hua Huang

Polyether ionophores, monensin, and salinomycin are commonly used as antiparasitic drugs in broiler production and may be present in broiler litter (bird excreta plus bedding material). Long-term application of broiler litter to pastures may lead to ionophore contamination of surface waters. Because polyether ionophores break down at low pH, we hypothesized that decreasing litter pH with an aci...

2015
Lucy C. Woodall Laura F. Robinson Alex D. Rogers Bhavani E. Narayanaswamy Gordon L. J. Paterson

*Correspondence: Lucy C. Woodall, Department of Life Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, UK e-mail: [email protected] Marine litter is a global challenge that has recently received policymakers’ attention, with new environmental targets in addition to changes to old legislation. There are no global estimates of benthic litter because of the scarcity of data an...

Journal: :Poultry science 2012
Z T Williams J P Blake K S Macklin

Controlling Salmonella populations on commercial broiler grow out farms is a crucial step in reducing Salmonella contamination in processing plants. Broiler litter harbors many species of pathogenic bacteria including Salmonella. Sodium bisulfate has been shown to reduce concentration of bacteria in broiler litter. In experiments 1 and 2, sodium bisulfate was applied to broiler litter at rates ...

Journal: :Marine pollution bulletin 2016
Allan Thomas Williams Peter Randerson Carlo Di Giacomo Giorgio Anfuso Ana Macias José Antonio Perales

A total of 59 categories of litter items were found at 20 beaches (13 mechanically cleaned, 7 non-cleaned) in the Cádiz tourist environment, Spain. Cluster Analysis and Principal Components Analysis were used to highlight similarities and contrasts between sites and/or associations between litter categories. Multivariate analyses separated beaches according to the total numbers of litter items ...

Journal: :Ecology letters 2012
Kyle Wickings A Stuart Grandy Sasha C Reed Cory C Cleveland

The chemical complexity of decomposing plant litter is a central feature shaping the terrestrial carbon (C) cycle, but explanations of the origin of this complexity remain contentious. Here, we ask: How does litter chemistry change during decomposition, and what roles do decomposers play in these changes? During a long-term (730 days) litter decomposition experiment, we tracked concurrent chang...

2014
Xiang Li Jianzhi Niu Baoyuan Xie Ben Bond-Lamberty

The role of leaf litter in hydrological processes and soil erosion of forest ecosystems is poorly understood. A field experiment was conducted under simulated rainfall in runoff plots with a slope of 10%. Two common types of litter in North China (from Quercus variabilis, representing broadleaf litter, and Pinus tabulaeformis, representing needle leaf litter), four amounts of litter, and five r...

Journal: :Journal of animal science 1990
G L Bennett K A Leymaster

Direct selection for ovulation rate, uterine capacity, litter size and embryo survival and selection for indexes of ovulation rate with each of the remaining traits were simulated for a swine population. The relationships among these traits were determined from a simulation model that assumed that litter size was always less than or equal to both ovulation rate and uterine capacity. Heritabilit...

2006
E. J. Sayer A. L. Lacey

Differences in forest productivity due to climate change may result in permanently altered levels of litterfall and litter on the forest floor. Using experimental litter removal and litter addition treatments, we investigated the effects of increased and decreased litterfall on early-stage litter decomposition and the abundance of meso-arthropods in a moist tropical forest. Litterbags containin...

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