trophic transfer

См. также в других словарях:

• Trophic level — First trophic level The plants in this image, and the algae and phytoplankton in the lake, are primary producers. They take nutrients from the soil or the water, and manufacture their own food by photosynthesis, using energy from the sun. The… …   Wikipedia

• Trophic dynamics — In ecology, trophic dynamics is the system of trophic levels (Greek trophē , food), which describe the position that an organism occupies in a food chain what it eats, and what eats it. Energy economy Ecologists study the energy economies of… …   Wikipedia

• trophic level — /trɒfɪk ˈlɛvəl/ (say trofik levuhl) noun a level in a food chain, represented as one of a succession of steps in the transfer of matter and energy in an ecosystem. The natural flow of energy in an ecosystem is from the sun to the plants (the… …  

• Integrated Multi-Trophic Aquaculture — (IMTA) is a practice in which the by products (wastes) from one species are recycled to become inputs (fertilizers, food) for another. Fed aquaculture (e.g. fish, shrimp) is combined with inorganic extractive (e.g. seaweed) and organic extractive …   Wikipedia

• Food web — A freshwater aquatic and terrestrial food web. A food web (or food cycle) depicts feeding connections (what eats what) in an ecological community. Ecologists can broadly lump all life forms into one of two categories called trophic levels: 1) the …   Wikipedia

• Biomagnification — Biomagnification, also known as bioamplification, or biological magnification is the increase in concentration of a substance, such as the pesticide DDT, that occurs in a food chain as a consequence of: * Food chain energetics * Low (or… …   Wikipedia

• Mercury in fish — Fish and shellfish concentrate mercury in their bodies, often in the form of methylmercury, a highly toxic organic compound of mercury. Fish products have been shown to contain varying amounts of heavy metals, particularly mercury and fat soluble …   Wikipedia

• Saxitoxin — Chembox new ImageFile = Saxitoxin structure.png ImageSize = IUPACName = (3aS (3a α,4 α,10aR*))2,6 diamino 4 (((amino carbonyl)oxy)methyl) 3a,4,8,9 tetrahydro 1H,10H pyrrolo(1,2 c)purine 10,10 diol OtherNames = Section1 = Chembox Identifiers CASNo …   Wikipedia

• Nanoparticule — Une nanoparticule (ou particule ultra fine) est définie par la norme ISO TS/27687 comme étant un nano objet dont les trois dimensions sont à l échelle nanométrique, c est à dire une particule dont le diamètre nominal est inférieur à 100 nm… …   Wikipédia en Français

• Biomagnificación — Saltar a navegación, búsqueda La biomagnificación es un proceso de bioacumulación de una sustancia tóxica. Ésta se presenta en bajas concentraciones en organismos al principio de la cadena trófica y en mayor proporción a medida que se asciende en …   Wikipedia Español

• Presencia de mercurio en peces — Presencia de mercurio en la cadena de alimentación. Los peces y bivalvos concentran mercurio en sus organismos, a menudo como metilmercurio, un compuesto orgánico del mercurio que es sumamente tóxico. Las investigaciones realizadas han permitido… …   Wikipedia Español