An ecosystem may undergo observations.Logical formLearned from4 sentences. A basis can be for an ecosystem.Logical formLearned from4 sentences. Ecosystems can be in parts of the world.Logical formLearned from4 sentences. A (desert ecosystem) can be polar.Logical formLearned from4 sentences. An ecosystem can be as a whole.Logical formLearned from4 sentences. Aquatic ecosystems may function.Logical formLearned from4 sentences. A course can be with ecosystems.Logical formLearned from4 sentences. An impact can be on health of an ecosystem.Logical formLearned from4 sentences. (Ecosystem services) may undergo a restoration.Logical formLearned from4 sentences. Sustainable management can be constituted-of-or-filled-with (forest ecosystems).Logical formLearned from4 sentences. (Ecosystem goods) may undergo a valuation.Logical formLearned from4 sentences. Pressures can be on ecosystems.Logical formLearned from4 sentences. Indices can be constituted-of-or-filled-with (ecosystem status).Logical formLearned from4 sentences. Losses may be caused by a degradation of ecosystems.Logical formLearned from4 sentences. Ecosystems can be mixed.Logical formLearned from4 sentences.