Gassmann, F; Klotzli, F; Walther, GR: Vegetation change shows generic features of non-linear dynamics, JOURNAL OF VEGETATION SCIENCE, 16(6), 703-712 (2005)
Question: In non-linear physical, or chemical, systems dynamic instability limits predictability and external fluctuations cause interesting, and sometimes counter intuitive, effects. We ask how these generic properties of complex systems are seen in vegetation change. Methods: An interacting particle system is used to simulate possible developments of a plant community that was observed for 30 years on a test area in the Luneburger Heide (Germany). We investigate simulated trajectories for five plant types over several decades. The internal updating rule, simulating the interactions between the five plant types, is completely deterministic, the only sources of stochasticity being the initial conditions and the external climatic variations. Results: Though the results of our simulation model share many aspects with those of stochastic models with probabilistic transition matrices, the solution manifold of our non-linear model goes beyond the possibilities of stochastic models. Among many stable developments, chaotic trajectories were also found. Climatic fluctuations increased the frequency of certain plant types. These properties of vegetation dynamics match the long-term field observations. They reflect generic features of complex systems. Conclusions: The presented non-linear model can provide insights into the dynamics of vegetation change, even though the mechanisms observed in the real world are modelled only in a rather general way. The rich behavioural. repertoire, resulting from deterministic internal dynamics, can simulate observed properties that are beyond the possibilities of models with probabilistic internal dynamics.
Aktuelle Termine

Mo. 18.07.2022
BayCEER Retreat 2022
Do. 07.07.2022
Postponed to WS 22/23: Preserving ecosystem services and biodiversity on agricultural land
Bayreuther Stadtgespräch(e):
Mi. 06.07.2022
Der Süden Neuseelands – Ursprüngliche Ökosysteme und ihre Bedrohung
Ökologisch-Botanischer Garten:
So. 03.07.2022 aktuell
Führung | "Mäusedorn und Katzenschwanz: Katzen und Botanik"
So. 03.07.2022 aktuell
Ausstellungseröffnung | "Natur und Kunst" - Malerei und Graphik von Christel Gollner
Wetter Versuchsflächen
Luftdruck (356m): 976.5 hPa
Lufttemperatur: 12.7 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 4.1 km/h
Wind (Max.): 7.6 km/h
Windrichtung: S

Globalstrahlung: 0 W/m²
Lufttemperatur: 11.9 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 0.0 km/h

Diese Webseite verwendet Cookies. weitere Informationen