The meaning of the creature indication and the indication creature

The ancient books of our country record that "there are green onions on the mountain, and silver under them; There is shallots on the mountain, and gold under them. "In recent years, studies have shown that Haizhou herb is an indicator organism of copper ore.

Hunan wild leek indicator gold mine; In the United States, a legume called "Acacia griformis" is an indicator of copper, and another cruciferous plant is found in Germany and Sweden that is an indicator of zinc. So far, the metal minerals found with the help of plant indicators are: nickel, chromium, aluminum, uranium, silver, gold, etc., and non-metallic minerals are:

Sulfur, oil, natural gas, etc.

Environmental confirmation by biology is called biological indication.

Organisms that can identify a certain type of environment are called indicator organisms or typical representative organisms.

生 [ shēng wù ].

Vocabulary book. Basic Definition Detailed Definition Dictionary Definition.

shēng wù ]

Refers to all living objects in general.

Every virus.

There is a certain range of hosts, and these hosts can be infected, resulting in certain types of symptoms. The symptoms produced by viruses infecting different hosts are often varied, but after some viruses infect a specific host plant, the host will produce characteristic typical symptoms, and the host plant that can produce unique typical symptoms after inoculation with a certain virus is called the indicator plant. In some virus diagnostics, the species and affiliation of the virus can be preliminarily determined based on the local or systemic symptomatic response of the indicator plant.

Biological counters, which are here.

Organisms or biological reactions that can reveal the presence or absence of contaminants through typical symptoms or self-measurable reactions. Usually choose the DAO

Organisms that have a certain indicator characteristic of an environment are called indicator organisms of that environmental feature. It can be divided into water pollution indicator organisms, air pollution indicator organisms, and soil pollution indicator organisms.

Select a condition. 1.There is enough sensitivity.

2.There is a wide geographical distribution and a sufficient number.

3.It is an important component of the ecosystem.

4.The laboratory is easy to propagate and cultivate.

5.He has a rich background in biology.

6.The response to a poison or factor can be measured.

7. It has important economic value and tourism value.

There are also many indicator organisms in terrestrial flora and fauna. Some birds are sensitive to air pollution, particularly carbon monoxide pollution. For example, canaries have been used to monitor carbon monoxide in coal mine tunnels for a long time.

Many plants are also sensitive to air pollution. For example, lichens, bryophytes, alfalfa, etc. are sensitive to sulfur dioxide, Tang Changpu and others are sensitive to cyanogen fluoride, and tobacco is sensitive to ozone. Many plants with long growth periods, easy to cultivate and manage, and sensitive to air pollution with obvious symptoms can be used as indicator organisms.