Information AboutKrummholz |
|
The tree-line or '''timberline''' is the edge of the habitat at which Tree s are capable of growing. Beyond the tree-line, they are unable to grow due to inappropriate environmental conditions. There are several types:
, Poland.]] At the tree-line, tree growth is often very stunted, affected by wind, with the last trees forming low, densely matted bushes. These are known as krummholz, from the German for 'twisted wood'. The tree line, like many other natural lines ( Lake boundaries, for example), looks sharp from a distance, but upon sufficiently close inspection, it becomes a more gradual transition. Trees grow shorter towards the inhospitable climate until they simply stop growing. The Climate above the tree-line is called an Alpine Climate . See that article for more details on what climatic factors prevent trees from growing. Typical tree-line species growing close to the arctic tree-line in the Kolyma region, arctic northeast Siberia.]] Some typical tree-line tree species (note the predominance of Conifer s):
Table of alpine tree-lines The alpine tree-line at a location is dependent on local variables, such as Aspect of slope, Rain Shadow and proximity to either Geographical Pole . Given this caveat, here is a list of average tree-lines from locations around the globe: Table of arctic and antarctic tree-lines Like the alpine tree-lines shown above, polar tree-lines are heavily influenced by local variables such as Aspect of slope and degree of shelter; trees can often grow in river Valleys at latitudes where they could not grow on a more exposed site. Maritime influences such as Ocean Currents also play a major role in determining how far from the equator trees can grow. Here are some typical polar treelines: , 55°S.]] REFERENCES
|
|
|