Ecosystems can be throughout a country.Logical formLearned from3 sentences. (Island ecosystems) can be terrestrial.Logical formLearned from3 sentences. Problems may face ecosystems.Logical formLearned from3 sentences. Programs may encourage protection of ecosystems.Logical formLearned from3 sentences. Trophic levels may pertain-to an ecosystem.Logical formLearned from3 sentences. Resources may exist within ecosystems.Logical formLearned from3 sentences. (River ecosystems) may undergo a degradation.Logical formLearned from3 sentences. Encroachment can be on ecosystems.Logical formLearned from3 sentences. (Tourism development) can be in terrestrial ecosystems.Logical formLearned from3 sentences. Ecosystems may undergo an investigation.Logical formLearned from3 sentences. A (production effort) can be a potential threat to ecosystems.Logical formLearned from3 sentences. A potential threat can be to ecosystems.Logical formLearned from3 sentences. An ecosystem can be semiarid.Logical formLearned from3 sentences. Coastal ecosystems can be around the world.Logical formLearned from3 sentences. Availability can be in ecosystems.Logical formLearned from3 sentences.