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Nothofagus
Hello.
I just came across a problem concerning Nothofagus trees. There is a wealth of species from the southern hemisphere and they are supposed to have spread apart to very distant places (Chile, Australia, NZ) after continental the drift from Antartica. My question is simple. Are these shrubs and trees supposed to get their nitrogen from symbiotic bacteria, as it is known in other species as Casuarina (and desert oak in Australia) ? Is this case they would sustain poor soil conditions. This is true for instance for Alnus shrubs (Alder) growing on stony scree here in the french Alpes. Some people in France are trying to adapt some Nothofagus varieties, not only to the wild, but to gardens. Thank you in advance for your kind consideration and comments. -- Jean Pelmont for mail remove aky |
#2
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JRP wrote:
Hello. I just came across a problem concerning Nothofagus trees. There is a wealth of species from the southern hemisphere and they are supposed to have spread apart to very distant places (Chile, Australia, NZ) after continental the drift from Antartica. My question is simple. Are these shrubs and trees supposed to get their nitrogen from symbiotic bacteria, as it is known in other species as Casuarina (and desert oak in Australia) ? Is this case they would sustain poor soil conditions. This is true for instance for Alnus shrubs (Alder) growing on stony scree here in the french Alpes. Some people in France are trying to adapt some Nothofagus varieties, not only to the wild, but to gardens. Thank you in advance for your kind consideration and comments. Not sure how likely you are to get a useful answer here. Perhaps in a botanical newsgroup? |
#3
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Mike McBain wrote:
Nothofagus are ectomycorhizal. No appropriate fungal symbiont, no growth. Thanks for your reply. Most forest trees, at least in Europe, are ectomycorhized. Appropriate symbionts are available since a dozen species of Nothofagus are grown by distributors. My question is about bacteria and dinitrogen assimilation. No fungus is able to do that. Symbiotic bacteria help the plant to bypass the need for nitrogenous organic supplies. -- Jean Pelmont for mail remove aky |
#5
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JRP wrote:
Hello. I just came across a problem concerning Nothofagus trees. There is a wealth of species from the southern hemisphere and they are supposed to have spread apart to very distant places (Chile, Australia, NZ) after continental the drift from Antartica. Yes. There are 8 genera and 100 species spread throughout the world. However, there are only five of importance in NZ. Generally, they grow from sea level to about 1200 metres, and depending on the species, easily handle a variety of conditions and poor or stony soils. My question is simple. Are these shrubs and trees supposed to get their nitrogen from symbiotic bacteria, as it is known in other species as Casuarina (and desert oak in Australia) ? I dont think so. Is this case they would sustain poor soil conditions. They will. This is true for instance for Alnus shrubs (Alder) growing on stony scree here in the french Alpes. Some people in France are trying to adapt some Nothofagus varieties, not only to the wild, but to gardens. Thank you in advance for your kind consideration and comments. The species here a (ref JT Salmon) Nothofagus menziesii (silver beech) Grows over a wide range of condition, In moderate conditions will grow to 30 metres with a trunk up to 2 metres through, to a dwarf form in harsh mountain conditions. Grows 0 ASL to 900 m. I have a magnificent large dining room table made of the timber. N truncata (hard beech) Grows 0 - 900 m ASL. Widespread in the country. Up to 30m tall and 2 m through. Partly deciduous in late winter early spring. N fusca (red beech) Our best looking beech. Bright red foliage when young and for many years. 30m and 2-3 metres through. Widespread, 0-1050m ASL Handles wide range of conditions. N solandri (black beech) 30m and up to 1m through. Widespread. Grows 0-750 m. N solandri variety cliffortioides (mountain beech) 15m and up to 1m through. Grows 0-1200m and is mostly a sub alpine/mountain tree. Handles tough climates and poor soils. Our beechs are 50-100 million years old, typically found along the mountain ranges, handle almost any conditions and poor soils. The likes of mountain beech will "colonise" mountain scree. In bad conditions they simply grow slower and may only reach 1 m tall, but they survive. JC |
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