This area, part of the Guayana Shield, represents one of the most pristine watersheds in South America, due in large part to the excellent stewardship of its principal indigenous group, the Ye'Kuana. It nonetheless faces a number of threats, ranging from a major hydroelectric dam and increased fishing pressure to rises in both tourism and agriculture. Documents 87 species of aquatic insect and 4 species of crab.
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On behalf of Parque Nacional Nahuel Huapi I would like to thank NHBS. The book will be very useful for my students.
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