“bioaccumulation”的概念、定义、翻译、参考文献-科学参考

bioaccumulation

Chemistry

An increase in the concentration of chemicals, such as pesticides, in organisms that live in environments contaminated by a wide variety of organic compounds. These compounds are not usually decomposed in the environment (i.e. they are not biodegradable) or metabolized by the organisms, so that their rate of absorption and storage is greater than their rate of excretion. The chemicals are normally stored in fatty tissues. DDT is known as a persistent pesticide, as it is not easily broken down and bioaccumulates along food chains, so that increasing concentrations occur in individual organisms at each trophic level.

Biology

An increase in the concentration of chemicals, such as pesticides, in organisms that live in environments contaminated by a wide variety of organic compounds. These compounds are not usually decomposed in the environment (i.e. they are not biodegradable) or metabolized by the organisms, so that their rate of absorption and storage is greater than their rate of excretion. The chemicals are normally stored in fatty tissues. DDT is known as a persistent pesticide, as it is not easily broken down and accumulates along food chains, so that increasing concentrations occur in individual organisms at each trophic level—a process termed biomagnification.

Geography

The build-up of poisonous substances in an organism, occurring when that organism absorbs a toxic substance faster than it sheds it. ‘The accumulation of toxins in specific parts of the ecosystem (usually at the higher levels of food chains) due to the greater ability of some chemicals to accumulate in zones where they become bioavailable, and are taken up and stored by producers and consumers. (The materials must be stored in those parts of the individual that will be consumed). It may result in severe adverse effects on an ecosystem once a threshold level of toxin storage is reached’ (J. Holden 2005).

单词	bioaccumulation
释义	bioaccumulation Chemistry An increase in the concentration of chemicals, such as pesticides, in organisms that live in environments contaminated by a wide variety of organic compounds. These compounds are not usually decomposed in the environment (i.e. they are not biodegradable) or metabolized by the organisms, so that their rate of absorption and storage is greater than their rate of excretion. The chemicals are normally stored in fatty tissues. DDT is known as a persistent pesticide, as it is not easily broken down and bioaccumulates along food chains, so that increasing concentrations occur in individual organisms at each trophic level. Biology An increase in the concentration of chemicals, such as pesticides, in organisms that live in environments contaminated by a wide variety of organic compounds. These compounds are not usually decomposed in the environment (i.e. they are not biodegradable) or metabolized by the organisms, so that their rate of absorption and storage is greater than their rate of excretion. The chemicals are normally stored in fatty tissues. DDT is known as a persistent pesticide, as it is not easily broken down and accumulates along food chains, so that increasing concentrations occur in individual organisms at each trophic level—a process termed biomagnification. Geography The build-up of poisonous substances in an organism, occurring when that organism absorbs a toxic substance faster than it sheds it. ‘The accumulation of toxins in specific parts of the ecosystem (usually at the higher levels of food chains) due to the greater ability of some chemicals to accumulate in zones where they become bioavailable, and are taken up and stored by producers and consumers. (The materials must be stored in those parts of the individual that will be consumed). It may result in severe adverse effects on an ecosystem once a threshold level of toxin storage is reached’ (J. Holden 2005).
随便看	natural kind natural language natural language processing natural-language processing natural-language understanding natural laws natural law theory natural logarithm natural monopoly natural number natural numbers natural parameter natural pollutant natural rate of interest natural rate of unemployment natural region natural remanent magnetism natural resource natural resource evaluation natural resource management natural resources natural rights natural selection natural theology natural units