Search results
Results from the WOW.Com Content Network
Fire frequency - this refers to the number of times fire occurs in a given area under a defined geologic time. The concept of fire frequency is often applied to local fire events. [25] Fire intensity - also known as fire severity or magnitude is the degree of fire or the magnitude of fire event. Fire intensity is categorized into low fire ...
Tree core sample collected with an increment boarer A cat-face fire scar on a ponderosa pine A cross section of a ponderosa pine fire scar showing several dated fire events The growth record of a tree in seasonal climates is preserved in the growth rings in the stem wood; the field of dendrochronology is the study of the record of climate and ...
The fossil record of fire first appears with the establishment of a land-based flora in the Middle Ordovician period, 9] permitting the accumulation of oxygen in the atmosphere as never before, as the new hordes of land plants pumped it out as a waste product.
The UK's biggest ever dinosaur trackway site has been discovered in a quarry in Oxfordshire. About 200 huge footprints, which were made 166 million years ago, criss-cross the limestone floor.
By using that method, some areas have tree-ring records dating back a few thousand years. Older wood not connected to a contemporary record can be dated generally with radiocarbon techniques. A tree-ring record can be used to produce information regarding precipitation, temperature, hydrology, and fire corresponding to a particular area.
One of the major factors that affect chironomid distribution is the climate conditions at local, regional, and global scales. Changes in these conditions are preserved as a fossil record over large periods of time. Through paleolimnological methods, including chironomid assessment, these changes can be extrapolated to predict future climate change.
Fire was an important factor in expanding and developing societies of early hominids. One impact fire might have had was social stratification. The power to make and wield fire may have conferred prestige and social position. [35] Fire also led to a lengthening of daytime activities, and allowed more nighttime activities. [45]
[6] [1] The analyses of the fossil record from past warm intervals of Earth's history (Paleogene-Eocene Thermal Maximum) provides an adequate comparison to test this hypothesis. Data shows that, during warmer climates, the frequency and diversity of insect damage to North American plants increased significantly, [ 7 ] providing support to the ...