Paragraf tamamlamaSoru #11137
The reintroduction of gray wolves into Yellowstone National Park in 1995 triggered a profound ecological phenomenon known as a trophic cascade. By regulating overpopulated elk herds, wolves prevented excessive grazing along river valleys and mountain slopes. ----. Consequently, the return of a single top predator rejuvenated an entire landscape.
- A)This allowed willows and aspens to recover, which in turn brought back beavers, songbirds, and cooled stream temperatures for native trout
- B)Elk populations expanded to such immense numbers that all plant life in the national park vanished
- C)Park rangers were forced to erect high electric fences across the wilderness to keep all animals indoors
- D)Beaver colonies immediately abandoned Yellowstone because wolves hunted them to complete extinction
- E)Riverbanks collapsed into mudslides because tree roots were completely destroyed by the predators
Cevabı ve çözümü göster
Doğru cevap: A) This allowed willows and aspens to recover, which in turn brought back beavers, songbirds, and cooled stream temperatures for native trout
Çözüm: Geyiklerin aşırı otlamasını engelleyerek nehir kenarındaki söğütlerin yeniden büyümesi ve kunduzların, kuşların dönmesi trofik çağlayan (trophic cascade) zincirini açıklar. Doğru cevap A'dır.