Gassmann, F; Klotzli, F; Walther, GR: Vegetation change shows generic features of non-linear dynamics, JOURNAL OF VEGETATION SCIENCE, 16(6), 703-712 (2005)
Abstract:
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


BayCEER-Kolloquium:
Do. 18.04.2024
The Canvas of Change: Creative Marketing for Behaviour Change, Sustainability and Social Good
Do. 18.04.2024
Survival, 'dormancy', and resuscitation of microorganisms in water-limited environments: insights from coastal salt flats and desert soil crusts
BayCEER Short Courses:
Di. 16.04.2024
Geographical information system and R environment for conservation biology
Ökologisch-Botanischer Garten:
So. 07.04.2024
Führung | Talking Tree: Was Bäume über´s Klima erzählen
Fr. 19.04.2024
Führung | Gesteine im Ökologisch-Botanischen Garten
Wetter Versuchsflächen
Luftdruck (356m): 956.0 hPa
Lufttemperatur: 13.3 °C
Niederschlag: 1.3 mm/24h
Sonnenschein: 1 h/d

...mehr
Globalstrahlung: 406 W/m²
Lufttemperatur: 12.4 °C
Niederschlag: 1.3 mm/24h
Wind (Höhe 32m): 11.3 km/h

...mehr
Diese Webseite verwendet Cookies. weitere Informationen