In the intensive livestock production systems, with decrease in grazing land and intensification of agriculture, the animal feeds are most likely to be contaminated with pesticides, dioxins, radionuclide, heavy metals, bacterial, fungal / mycotoxin contaminants etc., which may , market, it is the need of the hour to produce the livestock products free from contaminants. The feeds and fodders ar...

Seagrass beds play a vital role in estuarine systems worldwide by providing substrate, food, refuge from predation, and nursery habitat for a diverse assemblage of associated organisms (Williams & Heck 2001). Mesograzers, mobile epifaunal invertebrates, are important components of seagrass communities, serving as a link in the food chain from primary producers to higher-order consumers (Kikuchi...

Protistan grazers and viruses are major agents of mortality in marine microbial communities with substantially different implications for food-web dynamics, carbon cycling and diversity maintenance. While grazers and viruses are typically studied independently, their impacts on microbial communities may be complicated by direct and indirect interactions of their mortality effects. Using a modif...

11 The fate of benthic bacterial biomass in benthic food webs is a topic of major importance 12 but poorly described. This paper describes an alternative method for evaluation of bacterial 13 grazing rate by meiofauna and macrofauna using bacteria pre-enriched with stable isotopes. 14 Natural bacteria from the sediment of an intertidal mudflat were cultured in a liquid medium 15 enriched with 1...

Panicum turgidum is one of the most drought resistant plants in the Egyptian desert. Five habitat types were selected for the study: sand dunes (North Sinai and in Wady El-Natrun), gravel desert, coastal plain, and water runnels of a wadi bed (South Sinai and Eastern Desert). About 47.4% of the studied sites were subjected to high grazing pressure, 26.3% to moderate grazing pressure; the remain...

Background: In Burkina Faso, the agricultural sector accounts for 35% of the gross domestic product (GDP) and employs 82% of the active population. The agri-food industries must apply the requirements of the management systems to improve their economic position and ensure sustainable development. The present study aimed to highlight the similarities and particularities of these repositories gro...

Decline of native pelagic species in estuarine systems is an increasing problem, especially for native fishes in the San Francisco Estuary and Delta (SFE-D). Addressing these losses depends on understanding trophodynamics in the food web that supports threatened species. We quantified the role of microzooplankton (heterotrophic–mixotrophic protists <200 μm) in the food web of the upper SFE-D. W...

Salmonella was the archetypal food poisoning organism of the 20th century. It achieved a high public profile following the salmonella-in-eggs crisis of 1988–89, but by then had been the subject of public health concern and scientific interest for over a century. Early associated with animal foods, the advent of phage typing in the 1940s began to reveal the complexity of its environmental associ...