Hannes Hoffmann

Publications

• The Towed Balloon Apparatus

  Hannes Hoffmann

  The Newsletter of The International Canopy Network. 01/2004; 10(3):7.

  In the last two decades, canopy access has developed in multiple directions, with both selfsupporting and mobile access techniques. However, problems of access have made statistically sound sampling difficult. Nearly all researchers admit to some degree of bias in their choice of trees; they must ei... [more] In the last two decades, canopy access has developed in multiple directions, with both selfsupporting and mobile access techniques. However, problems of access have made statistically sound sampling difficult. Nearly all researchers admit to some degree of bias in their choice of trees; they must either be of the appropriate size and architecture to climb safely, or occur directly below a canopy crane or canopy sled. Studies are still restricted to a finite and potentially biased set of trees without replication of stands. Furthermore, few tudies or sites can be directly and effectively compared (Nadkarni 2002). Techniques that have both mobile and self-supporting characteristics are needed to expand our reach, making previously unexplored areas accessible. To date, self-supporting canopy access techniques are not mobile and mobile ones are not self-supporting. Here, I discuss how proven technology for tree seed harvesting may close this gap.

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