No Eden in the New World
Article Abstract:
New evidence suggests that Mesoamerican agricultural practices before the Spanish conquest in the 16th century were not environmentally harmless as has been widely assumed. Sarah L. O'Hara and coworkers deduced rates of erosion due to agriculture from 21 cores taken the bottom of Lake Patzcuaro in Mexico. The resulting data show that prehispanic agriculture caused as much damage in the form of erosion as did pre-industrial land use under Spanish rule.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1993
User Contributions:
Comment about this article or add new information about this topic:
The rise and growth of Tibet
Article Abstract:
The key to unraveling the uplifting history of the central Tibetan plateau is found in lake sediments on the plateau, some of which formed as long ago as 40 million years. The evolution of mountain topography reflects the balance between tectonic forces in Earth's crust and upper mantle, and climatically driven erosion of Earth's surface.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
Orbit-related long-term climate cycles revealed in a 12-Myr continental record from Lake Baikal
Article Abstract:
Research is presented concerning the climatic cycles occurring over the past 12-million-years which have been revealed through the study of sediment cores from Lade Baikal. The cooling of the Asian continent is discussed.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Why those who would save the world cannot. The making of a magazine. It's a man's world
- Abstracts: Heavy element synthesis in the oldest stars and the early Universe. The age of the Universe
- Abstracts: Two cradles for the heavy elements. X-rays from the edge of infinity. The dark cradles of stars
- Abstracts: Cretaceous age for the feathered dinosaurs of Liaoning, China. An early Cretaceous pellet
- Abstracts: Regional assessment of remote forests and black bear habitat from forest resource surveys. Multi-scale habitat partitioning in sympatric suiforms