Temporal dynamics
18 important questions on Temporal dynamics
What are some expamples of legacies climate wise?
Post-glacial migration (many species are still migrating poleward)
What are some examples of legacies soils wise?
Methane flux from Siberian lakes (source is pleistocene SOM)
What is ecosystem resistance?
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What is recovery, regarding ecosystem change?
What are the properties of a disturbance regime?
Intensity
Frequency
Type
Size
Pattern
Timing
What is severity (disturbance regime)
What is Intensity (disturbance regime)
What is frequency (disturbance regime)
What is size (disturbance regime)
What is pattern (disturbance regime)
What is Timing (disturbance regime)
What scale of ecosystem variation is explained with succesion?
climate and topography moreso explain regional patterns
What is the difference between the kinds of succesion?
secondary succession: many of the initial colonisers are already present right after disturbance
How does the NPP change over time during primary succession?
The presence of N fixing plants or other sources of N determine the biomass production
2. Forest productivity often the highest mid-succession
3. Forest productivity declines followingn canopy closure (maximum LAI)
What are possible explanations for the decrease of productivity following canopy closure?
Decreased nutrient availability
How is the GPP divided between NPP and plant respiration?
Can you temporally scale the observation by multiplicatoin from hours to days for instance?
What is the effect of primary and secondary succession on nutrient cycling?
(N accumulation of 3 to 16 g N m^-2 y^-1 for 50 to 100 years
During early secondary succession a pulse of nutrient availability , which fate depends on retention mechanisms
- plant uptake
- microbial uptake
- adsorption to minerals
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