Some of these factors include imperialism, nationalism, and militarism. Imperialism is the desire for land.
May 14, Temperature changes over Asia, A vast array of physical and biological systems across the earth are being affected by warming temperatures caused by humans, says a new analysis of information not previously assembled all in one spot.
The study appears in the May 15 issue of the leading scientific journal Nature. Rosenzweig and researchers from 10 other institutions across the world analyzed data from published papers on physical systems and some 28, plant and animal systems, stretching back to Their analysis of revealed a picture of changes on continental scales; previous studies had looked mainly at single phenomena, or smaller areas.
These include wastage of glaciers on all continents; melting permafrost; earlier spring river runoff; and warming of water bodies.
The researchers say it is unlikely that any force but human-influenced climate change could be driving all this; factors like deforestation or natural climate variations could not explain it. On the other continents, including South America, Australia and Africa, documentation of changes in physical and biological systems is sparse, even though there is good evidence there of human-influenced warming itself.
The authors say that there is an urgent need to study these environmental systems, especially in tropical and subtropical areas. American holly, sassafras, box elder maple in Washington, D.
Cannibalism and declining populations among polar bears in southern Beaufort Sea.
Rapid melting of Alaska glaciers. Earlier breeding and earlier arrival dates of birds American robins are arriving 14 days earlier in Colorado. Shoreline retreat in southern Gulf of St.
Advancing spring flight of butterflies in lowa and California. Change in mollusk poulations in Monterey, California. Earlier high river flows in New England. Earlier peak migration of Atlantic salmon in New England. Earlier breakup and later freezing dates in lake and rive ice over wide areas.
Declining mountain snowpack in the West. Earlier streamflow timing across the West. Changes in diatoms in northern Canadian lakes. Genetic shift in pitcher plant mosquito to more warm-adapted type in Eastern U. Marmots are emerging 38 days earlier in the Rockies.
Frogs including the bullfrog and the American toad are calling earlier in Ithaca, N.Angela A Stanton, PhD, is a Neuroeconomist who evaluates changes in behavior, chronic pain, decision-making, as a result of hormonal variations in the brain.
48 Dirty Little Secrets Cryptographers Don't Want You To Know. Over the past year, more than 10, people participated in the Matasano crypto challenges, a staged learning exercise where participants implemented 48 different attacks against realistic cryptographic constructions.
Preliminary versions of economic research. Did Consumers Want Less Debt? Consumer Credit Demand Versus Supply in the Wake of the Financial Crisis. Desertification Effects, Causes, And Examples List Desertification is a process of land-degradation by which a region becomes progressively drier and drier.
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