No, the forest is about many sets of interconnected, symbiotic actions and reactions. To look at any part on the nano scale and then keep it in proper perspective will all the other parts, frankly has never been done. Please try if you think you can...
E. O. Wilson in his book, Consilience talks about how we are drowning in data while starving for wisdom. Nano technology is all about data, but where is the wisdom? And who is the master, Nature or our nano technology? Can we understand 'externalizations and unintended consequences' as they relate to nano technology verses Nature?
Your question is forest ecosystem field monitoring at present world wide more effectively used technique GIS and GPS monitoring techniques. Nanotechnology technique is not much explored practically as on date......
Kenneth, Yes and in retrospect, how well are we doing? Can you name one place on the planet that is living in balance with Nature while leaving future generations with as much opportunity as we had? The evidence is overwhelming, if one's eye's are wide open...
Thinking from first principle. Nano-materials have all kinds of specific light, water and plant nutrient absorption characteristics. And these are the inputs of the forest ecosystem. Consequently all kinds of monitoring instruments could be designed for (forest) ecosystems. What would you like to measure.
Knowing that one of the main problems of rubber trees in South and Central America is the evil-of-leaf disease caused by the fungus Microcyclis ulei.
I think nanotechnology could contribute to characterize the supercial structure of the leaves of the trees that have to be resistant to certain diseases, if known the contamination mechanism can be selected and or turn the leaf surface and have varieties in comprehensive resistant scale to these diseases leaf.