Table 2 Mixed-effect model analysis of species richness (total as well as of the three functional groups) to exploratories, land use, treatment in the two experimental periods with plot-ID as random effect (see Fig. 1)

2

35

19.8***

39

4.79*

35

21.3***

39

10.6***

2

35

7.81**

39

1.40^n.s.

35

10.2***

39

3.46*

1

43

2.00^n.s.

43

7.08*

43

0.263^n.s.

43

0.328^n.s.

4

35

4.78**

35

9.33***

2

32

23.0***

36

2.04^n.s.

32

29.5***

36

13.9***

2

32

13.2**

36

1.60^n.s.

32

17.5***

36

4.19*

1

40

0.738^n.s.

40

2.26^n.s.

40

0.603^n.s.

40

0.122^n.s.

4

32

3.16**

32

6.29***