XII EVS CH 1&2 Revision

4. When succession occurs in salt water or saline soil it is known as _____.
7. ESV stands for Ecosystem services ______.
8. The destruction of an ecosystem, causing it’s entire loss is called_______.
9. Ecological succession that is occurring in a place that was initially inhabited but then destroyed is known as _____ succession.
14. Another word for soil is ________.
15. Balance in an ecosystem is called ______.
18. The initial establishment of a plant community in the new area is known as ____.
20. Ecological succession that is occurring in a previously uninhabited place is known as ______ succession.
21. Succession initiated by changes in organisms within the community is known as _____ succession.
23. Genetic diversity is a type of ____ service.
24. Food, fuel and medicines are classed as ________ services.
27. When the species in a growing community increase and come close to each other it is called ________.
28. We are uncertain about all the values an ecosystem may have in the future, this is _____ value.
31. The number of different species in an ecosystem is called _______.
32. The intermediate stage in ecological succession is known as a _____ community.
33. Early stages of ecological succession are called ____ stages.

1. Value for an ecosystem, even if we don’t use it is called _____ value.
2. Value for an ecosystem service that will be passed on to future generations is called ______ value.
3. Ecotourism is a type of ______ service.
5. The transitional space between communities is called __________.
6. The formation of a stable ecosystem over time is known as ecological ________.
10. Value for an ecosystem to make resources available to others in our generation is _______ value.
11. Agriculture, mining, and logging are examples of ______ disturbances.
12. Cyclones, earthquakes and wildfires are examples of _______ disturbances.
13. We determine the economic value for an ecosystem service that has direct influence on the price of other things is _________ pricing method.
16. Purification of water is a type of _____ service.
17. Succession initiated by changes in the environmental conditions is known as _____ succession.
19. When succession occurs in an aquatic habitat it is known as ______.
22. WTP stands for ________ to Pay.
25. When plants dominate early stages of succession it is called ______ succession.
26. PES stands for _________ for Ecosystem services.
29. The final stage of ecological succession is called _______ community.
30. When succession occurs on dry bare land it is known as ______.