XII EVS CH 1&2 Revision

5. ESV stands for Ecosystem services ______.
7. Ecological succession that is occurring in a place that was initially inhabited but then destroyed is known as _____ succession.
8. When the species in a growing community increase and come close to each other it is called ________.
9. When plants dominate early stages of succession it is called ______ succession.
11. Food, fuel and medicines are classed as ________ services.
13. Purification of water is a type of _____ service.
16. The number of different species in an ecosystem is called _______.
17. The formation of a stable ecosystem over time is known as ecological ________.
18. When succession occurs on dry bare land it is known as ______.
21. Genetic diversity is a type of ____ service.
22. When succession occurs in an aquatic habitat it is known as ______.
24. The transitional space between communities is called __________.
25. Succession initiated by changes in the environmental conditions is known as _____ succession.
26. Early stages of ecological succession are called ____ stages.
29. We determine the economic value for an ecosystem service that has direct influence on the price of other things is _________ pricing method.
31. PES stands for _________ for Ecosystem services.
32. Ecological succession that is occurring in a previously uninhabited place is known as ______ succession.

1. The destruction of an ecosystem, causing it’s entire loss is called_______.
2. Ecotourism is a type of ______ service.
3. The intermediate stage in ecological succession is known as a _____ community.
4. Balance in an ecosystem is called ______.
6. Agriculture, mining, and logging are examples of ______ disturbances.
10. WTP stands for ________ to Pay.
12. Value for an ecosystem to make resources available to others in our generation is _______ value.
14. Value for an ecosystem, even if we don’t use it is called _____ value.
15. Succession initiated by changes in organisms within the community is known as _____ succession.
19. The initial establishment of a plant community in the new area is known as ____.
20. We are uncertain about all the values an ecosystem may have in the future, this is _____ value.
22. When succession occurs in salt water or saline soil it is known as _____.
23. Value for an ecosystem service that will be passed on to future generations is called ______ value.
27. Cyclones, earthquakes and wildfires are examples of _______ disturbances.
28. Another word for soil is ________.
30. The final stage of ecological succession is called _______ community.