By Peter Wohlleben
Ein neuer Blick auf alte Freunde
Erstaunliche Dinge geschehen im Wald: Bäume, die miteinander kommunizieren. Bäume, die ihren Nachwuchs, aber auch alte und kranke Nachbarn liebevoll umsorgen und pflegen. Bäume, die Empfindungen haben, Gefühle, ein Gedächtnis. Unglaublich? Aber wahr! – Der Förster Peter Wohlleben erzählt faszinierende Geschichten über die ungeahnten und höchst erstaunlichen Fähigkeiten der Bäume. Dazu zieht er die neuesten wissenschaftlichen Erkenntnisse ebenso heran wie seine eigenen unmittelbaren Erfahrungen mit dem Wald und schafft so eine aufregend neue Begegnung für die Leser: Wir schließen Bekanntschaft mit einem Lebewesen, das uns vertraut schien, uns aber hier erstmals in seiner ganzen Lebendigkeit vor Augen tritt. Und wir betreten eine völlig neue Welt ...
Peter Wohlleben, geboren 1964, studierte Forstwirtschaft und arbeitete 23 Jahre in der Landesforstverwaltung Rheinland-Pfalz. 2006 gab er seine Stelle auf und übernahm als Förster ein 1200 Hektar großes Waldgebiet in der Eifel. Dort setzt er seine Vorstellungen von einem ökologisch wie ökonomisch vertretbaren Naturschutz erfolgreich um. Nebenbei entdeckte er seine Lust am Schreiben.
Er ist Gast in zahlreichen TV-Sendungen und gibt sein Wissen in Büchern und Seminaren, aber auch durch ungewöhnliche occasions wie den Bau von Blockhäusern weiter.
Read or Download Das geheime Leben der Bäume: Was sie fühlen, wie sie kommunizieren - die Entdeckung einer verborgenen Welt PDF
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Extra resources for Das geheime Leben der Bäume: Was sie fühlen, wie sie kommunizieren - die Entdeckung einer verborgenen Welt
Example text
For example, b1 could be the land area that a manager can use, b2 the amount of money available to spend. In that case, each aij is a constant that measures how much of resource i is used per unit of activity j. For example, keeping the interpretation of b2 just given and assuming that X1 is the number of hectares planted in a given year, a21 is the cost of planting one hectare. More generally, this interpretation means that the product aijXj is the amount of resource i used when activity j is at the level Xj.
Move to adjacent extreme point in direction that most increases the objective function, Z Yes Has move improved Z ? 5 Flowchart of the simplex algorithm. 40 Decision Methods for Forest Resource Management Z occurs, indicating that the optimum solution was obtained in the penultimate iteration. 6). Step a: Find an initial basic feasible solution. 6; that is: Nonbasic variables: X1 = 0, X2 = 0 Basic variables: S1 = 40, S2 = 50, S3 = 180 Objective function: Z0 = 0 The three slack variables are basic in this initial solution.
The area managed in each timber type cannot exceed the area available; that is: X1 ≤ 40 ha of red pine X 2 ≤ 50 ha of northern hardwoods Time Constraint Another constraint is set by the fact that the poet does not want to spend more than half his time, let us say 180 days a year, managing his woods. In order to 13 Principles of Linear Programming: Formulations write this constraint in terms of the decision variables, we note that the time he has spent managing red pine during the past 10 years (800 days for 40 ha of land) averages to 2 days per hectare per year (2 d/ha/y).