Ecological strategy

This has been discussed in terms of the plant strategy models of Grime in Chapter 4.

These models, in essence, integrate some of the factors already discussed, with regard to growth rate, etc., and are very useful aids to plant selection. A rather demanding example of this can be found in Hodgson (1989). Strategy data on individual native species are provided in Grime et al. (1988). Hitchmough (1994) has speculated on the strategies of a number of exotic species.

Ecological strategy

6.10

The effect of slug control during the first four weeks post-germination on the survival of sown North American prairie forbs: (a) the plot was pelleted with metaldehyde; and

(b) the plot was not pelleted

Table 6.13. Relative palatability of seedlings to slugs and snails (from Hanley et al. 1995; Scheidel and Brueheide 1999; and as yet unpublished research of the author)

Highly palatable

Low palatability

Arnica montana

Aster oolentangiensis

Asclepias tuberosa

Aster laevis

Baptisia australis

Aster novae-angliae

Cacalia atriplicifolia

Geranium sylvaticum and many other spp.

Centaurea orientalis

Knautia arvensis

Echinacea purpurea

Lychnis chalcedonica

Helianthus mollis

Persicaria bistorta

Liatris aspera

Primula veris

Ratibida pinnata

Ranunculus acris

Salvia nemorosa

Rudbeckia subtomentosa

Silphium

Rumex acetosa

terebinthinaceum

Schizachyrium scoparium

Trollius europaeus

Silphium integrifolium Sorghastrum nutans Sporobolus heterolepis Stachys officinalis Succisa pratensis Veronicastrum virginicum