منابع مشابه
Women and Food Chains:
hr ge the me oughout history, the social relations of food have been organized along lines of nder. Today, in most societies women continue to carry the responsibility for ntal and manual labor of food provision—the most basic labor of care. Women's involvement with food constructs who they are in the world—as individuals, family members, and workers—in deep, complex, and often contradictory wa...
متن کاملFood Chains, Food Webs and Ecological Pyramids
Photosynthesis is only the beginning of a chain of energy conversions. There are many types of animals that will eat the products of the photosynthesis process. Examples are deer eating shrub leaves, rabbits eating carrots, or worms eating grass. When these animals eat these plant products, food energy and organic compounds are transferred from the plants to the animals, known as a food chain. ...
متن کاملDeveloping sustainable food supply chains.
This paper reviews the opportunities available for food businesses to encourage consumers to eat healthier and more nutritious diets, to invest in more sustainable manufacturing and distribution systems and to develop procurement systems based on more sustainable forms of agriculture. The important factors in developing more sustainable supply chains are identified as the type of supply chain i...
متن کاملStochastic Lotka-Volterra food chains.
We study the persistence and extinction of species in a simple food chain that is modelled by a Lotka-Volterra system with environmental stochasticity. There exist sharp results for deterministic Lotka-Volterra systems in the literature but few for their stochastic counterparts. The food chain we analyze consists of one prey and [Formula: see text] predators. The jth predator eats the [Formula:...
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ژورنال
عنوان ژورنال: Mathematical and Computer Modelling
سال: 1998
ISSN: 0895-7177
DOI: 10.1016/s0895-7177(98)00011-9