Fill in the Blanks 1 - Changes in EcosystemsOnline version Chapter 1, Lesson 4: "Changes in Ecosystems". Use your textbook to help you fill in the blanks (write the words) pages 222 - 231. by Naneth Burquez 1 threatened endangered extinct limiting pioneer biodiversity climax biotic abiotic adapt succession 1 . - A species that has decreased until it is almost endangered is considered . 2 . - Species that no longer exists is considered . 3 . - The term used to describe the wide variety of life on Earth is . 4 . - Species that may become extinct if its population decreased further is considered . 5 . - A condition that controls the size or growth of a population is called a factor . 6 . - When a community has stabilized and succession has slowed down or stopped , it is a community . 7 . - The gradual replacement of one community by another is called . 8 . - The first species to establish themselves in a lifeless area form a community . 9 . - Organisms that remain in a region must to changes in the environment . 10 . - Some limiting factors are living , or and some are nonliving , or .
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