This study investigated the effects of organic and inorganic nutrients on the microbial degradation of the common soil contaminant pyrene. The material used in this investigation was collected from potted trees that had been growing for over a year in a soil artificially contaminated with polycyclic aromatic hydrocarbons. Soil was removed from the nonroot (bulk) and root (rhizosphere) zones of ...

OBJECTIVES To determine inorganic nutrient and contaminant concentrations in subsistence foods consumed by Alaska Natives, concentration changes related to common preparation methods and provide a basic risk-benefit analysis for these foods. STUDY DESIGN Eleven essential and six non-essential elements were measured in foods derived from spotted seals and sheefish. METHODS Essential nutrient...

We present a theory extending the source-sink concept with an ecosystem perspective. We analyze a model for meta-ecosystem dynamics in a heterogeneous environment to study how the spatial flows of materials such as inorganic nutrients and nutrients sequestered into producers, herbivores, and detritus affect the community dynamics. We show that spatial flows of an inorganic nutrient (direct nutr...

Human activities in the watersheds of the tributaries of Pamlico Sound (PS) in North Carolina have resulted in increased riverine loading of nutrients. Pamlico Sound is a regionally important aquatic resource, and provides crucial foraging and nursery habitats for Southeast Atlantic fisheries. Changes in phytoplankton community composition that may result from increased frequency and quantity o...

Balanced nutrients are essential for healthy plant growth, but there is no sensor available to monitor such as N and K. Electrical conductivity (EC) one of the key parameters that could be adopted nutrient contents because soil EC influenced by nutrients. Therefore, main objective this study was examine effects different basal fertilizers, including inorganic, organic, compost application ratio...