BIOTIC FACTORS - All the living things in an ecosystem., ECOSYSTEM - A biological community that occurs in a certain geografical area and includes the living and non living elements., PRIMARY SUCCESSION - Type of succession that starts in a barren area., DISASTERS - Secondary ecological successions start after natural ________, ABIOTIC - The environmental elements of an ecosystem.  , LICHENS - They are considered a pioneer species., ECOTONE - The transition between two ecosystems., BIODIVERSITY - the variety of living creatures in an ecosystem., ECOLOGICAL SUCCESSION - The predictable changes in the development of an ecosystem., BARE - Primary succession starts from _______ rocks., PIONEER SPECIES - The first colonizers in a barren area., CLIMAX COMMUNITY - The last stage in a balanced ecosystem., SECONDARY - The type of succession that occurs more frequently.,

Ecosystems

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