نتایج جستجو برای: grazing food chain
تعداد نتایج: 568347 فیلتر نتایج به سال:
The phytoplankton in warm oligotrophic regions of the open oceans is dominated by ,2-mm cells too small for efficient direct consumption by mesozooplankton. However, these primary producers are hypothetically linked to higher trophic levels via the cascading impacts of mesozooplankton grazing on intermediate consumers. To assess the magnitudes of these indirect trophic linkages, grazing experim...
in iran we already use laminate tubes only in cosmetics industry. laminate tube manufacturers via using the most modern technology of the world, faced with the laminate tube market being saturated in cosmetics industry for packaging the cosmetic creams and toothpaste. but considering the great food market and therefore laminate tube features such as beautiful packaging, ease of use for the fina...
Food safety crises usually receive widespread publicity and an extensive media coverage which evidently is mainly negative. Based on previous research, the purpose of this article is to illustrate the impact of positive and negative food safety information on demand both in the short and long term. Apparently, asymmetric effects of media coverage provoke a shift in the consumers’ perception of ...
The food supply chain is a critical infrastructure that is an attractive target for terrorist attacks. Despite its importance, relatively little research has focused on improving the security of the food supply chain infrastructure. This is largely due to a lack of awareness on the part of food supply chain stakeholders and authorities about the threats. This paper describes a methodology for a...
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...
Ruminant livestock provides meat and dairy products that sustain health and livelihood for much of the world's population. Grazing lands that support ruminant livestock provide numerous ecosystem services, including provision of food, water, and genetic resources; climate and water regulation; support of soil formation; nutrient cycling; and cultural services. In the U.S. southern Great Plains,...
The temporal variability of streamflow is known to be a key feature structuring and controlling fluvial ecological communities and ecosystem processes. Although alterations of streamflow regime due to habitat fragmentation or other anthropogenic factors are ubiquitous, a quantitative understanding of their implications on ecosystem structure and function is far from complete. Here, by experimen...
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