aIn Arizona, man made dams across the Colorado River have made two large lakes in the middle of the dry desert country. At Lake Powell, the red stone arch of Rainbow Bridge rises high above the blue lake. 在亚利桑那,人被制作水坝横跨科罗拉多河在干燥沙漠国家中间做了二个大湖。 在湖Powell,彩...
In Arizona man-made dams across the Colorado River had made two large lakes in the middle of the dry desert country. At lake Powell the red stone arch(拱状)of Rainbow(彩虹)Bridge rises high above the blue lake. There are few roads. Many areas of Lake Powell's shore can only be reach...
The other, called the Global Paleofire Database, has records of charcoal (木炭) deposited in lakes from 160 sites worldwide, which show changes in fire activity nearby.The team found that the biggest increases in fire activity were in the continents, such as South America, which lost the ...
The flood channel, called Ma'adim Vallis, is said to be larger than the Grand Canyon in Arizona. The abundance of dry valleys on Mars could indicate that water once flowed on the pla...
The Kayapo have uncontested constitutional rights to their land and natural resources, including the legal right to defend their territory. Under the Brazilian Constitution (art. 231(2)), native communities have exclusive use rights to the riches of the soil, forests, rivers, and lakes within the...
More than half of the world’s rivers dry up periodically, but our understanding of the biological communities in dry riverbeds remains limited. Specifically, the roles of dispersal, environmental filtering and biotic interactions in driving biodiversity
We present observations on the frequency of large branchiopod associations found in north-central Mexico, and in Arizona, USA. Of a total of 25 species involved in these assemblages, 12 were common in both areas. Fifty-eight (43.3%) of the ponds in Mexico, and seventy-eight (47%) of ...
Prehistoric and recent extinctions of large-bodied terrestrial herbivores had significant and lasting impacts on Earth’s ecosystems due to the loss of their distinct trait combinations. The world’s surviving large-bodied avian and mammalian herbivores
Coupled fluid–solid phase continuum problems associated with large deformation as geotechnics experts encounter in slope stability problems have been
1). The urban areas, dry lakes, and lakes in those ecoregions were removed from the study area by using the GAP dataset (McMahon et al., 2001). 3.2. Field data collection The Landscape Approach Data Portal (https://landscape.blm.gov/geoportal) contains field measurements from BLM lands (...