Linking Restoration and Ecological Succession (Springer ... - Inecol

NPP/transpiration
NPP/MSR
NPP/transpiration
NPP/MSR
mean species no.
N-balance
mean species no.
N-balance
Abandonment: Sere A
100 NPP
50
0
-50
-100
-150
C-balance
NPP
100
80
60
40
20
0
-20
C-balance
N-net mineralization
MSR
N-leaching
Denitrification
I II III IV
Succesional stages
N-net mineralization
MSR
N-leaching
Chapter 5 Succession and Restoration of Drained Fens 101
Denitrification
NPP/transpiration
NPP/MSR
NPP/transpiration
NPP/MSR
mean species no.
N-balance
mean species no.
N-balance
Abandonment: Sere B
NPP
100
80
60
40
20
0
-20
C-balance
NPP
100
80
60
40
20
0
-20
C-balance
N-net mineralization
MSR
N-leaching
Denitrification
Abandonment: Sere C Rewetting and abandonment of wet pastures
Wet pasture (5)
Tall sedge reed
eutrophic (2 B)
N-net mineralization
MSR
N-leaching
Denitrification
Alder carr
eutrophic (1 B)
Figure 5.5 Amoeba diagrams indicate the changes of species richness and simulated indicators after abandonment
of small sedge reeds (sere A), mesotrophic wet meadows (sere B), eutrophic wet meadows (sere C), and rewetting
of wet pastures. In each sere, the highest values of the parameters were set as 100 (%). Negative values (C-,
N-balances) characterize the systems as nutrient sinks.
5.3.2 Changes of Ecosystem Features in the Abandonment Seres
During succession, species richness decreased significantly in all abandonment
seres from stages I to III (Fig. 5.4). Significant differences between stages I and
II were only detected in successional sere A. In the seres A and C there was a
significant increase of species richness from stage III to IV.
Amoeba diagrams (Fig. 5.5) illustrate the changes in all simulated parameters
(mean values over the 20 years simulation period) for the abandonment
succession for all seres and for rewetting abandoned wet pastures. In sere A
all parameters except C-balance showed a progressive increase from stage 1 to
stage 4. Such a clear-cut “progressive” trend was not found for all parameters in
the other seres. In sere A (starting as the small sedge reed community 3) and B
(starting as the mesotrophic wet meadow 4A) the NNM values increased from
stage I to stage IV. In sere C (starting as the eutrophic wet meadow 4B), NNM
values decreased from stage I to II and III, and then increased in stage IV. Thus,