(Food webs) may pertain-to an ecosystem.Logical formLearned from5 sentences. Ecosystems can be balanced.Logical formLearned from5 sentences. Ecosystems may undergo an identification.Logical formLearned from5 sentences. Respect can be to an ecosystem.Logical formLearned from5 sentences. Ecosystems can be sensitive.Logical formLearned from5 sentences. Ecosystems can be difficult.Logical formLearned from5 sentences. An ecosystem can be plain.Logical formLearned from5 sentences. A (forest ecosystem) may pertain-to persons.Logical formLearned from5 sentences. An ecosystem may face threats.Logical formLearned from5 sentences. An ecosystem may pertain-to areas.Logical formLearned from5 sentences. An ecosystem can be untouched.Logical formLearned from5 sentences. Coastal ecosystems can be degraded.Logical formLearned from5 sentences. Ecosystems may pertain-to a continental-region.Logical formLearned from5 sentences. Nitrogen can be in ecosystems.Logical formLearned from5 sentences. Changes can be in (ecosystem function).Logical formLearned from5 sentences.