Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Historic Sanctuary of Machu Picchu' has mentioned 'Ecosystem' in the following places:
Occurrence Sentence Text Source
Since the time of inscription consistent concerns have been expressed about ecosystem degradation through logging, firewood and commercial plant collection, poor waste management, poaching, agricultural encroachment in the absence of clear land tenure arrangements, introduced species and water pollution from both urban waste and agro-chemicals in the Urubamba River, in addition from pressures derived from broader development in the region.