Disproportionate effects of keystone species

Biologia IBPaper 1A, maj 2026, TZ1wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 29

A keystone species disappears from a food web. Which outcome is plausible? A. All interactions necessarily become more stable B. Every remaining species immediately becomes extinct C. The number of trophic levels must increase by one D. Some previously…

Biologia IBPaper 2, maj 2025, TZ1wzorowane2 pktotwarteśrednie (szac.)

Zadanie 2c

A predator acts as a keystone species in a coastal food web. Explain possible effects of losing this species.

Biologia IBPaper 2, maj 2025, TZ2wzorowane2 pktotwarteśrednie (szac.)

Zadanie 4a

Reintroducing a native ecosystem engineer to a wetland changes water flow and creates pools and channels. Outline the importance of keystone species.

Biologia IBPaper 3, listopad 2023, TZ1wzorowane1 pktotwarteśrednie (szac.)

Zadanie 14c

Define a keystone species.

• Materiał graficzny

Biologia IBPaper 3, listopad 2023, TZ1wzorowane4 pktotwarteśrednie (szac.)

Zadanie 14d

Discuss advantages of protecting this bird through in situ conservation.

• Materiał graficzny

Biologia IBPaper 3, listopad 2023, TZ2wzorowane2 pktotwarteśrednie (szac.)

Zadanie 16c

Explain the effects of the sea star as a keystone species in this community.

• Materiał graficzny