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- Title
The restoration of sedge meadows: seed viability, seed germination requirements, and seedling growth of Carex species
- Authors
Gordon, Elizabeth; van der Valk, Arnold G.; Bremholm, Tony L.
- Abstract
To better understand how to establish Carex species from seed in created and restored wetlands, a series of experimental studies was conducted on Carex seed and seedlings. These studies included (1) the effect of seed age (1 to 18 months after collection) on viability and germination, (2) storage conditions (+4, -4 or +4/-4 % C; wet or dry) on seed germination, (3) soil moisture on seed germination, and (4) soil amendments (fertilizer, topsoil, and compost) on seedling recruitment and growth. Seeds of Carex species of several provenances would not germinate to any appreciable extent once they were more than six months old. For Carex aquatilis, germination could be increased by storing its seed at either 4 % C or -4 % C. For Carex lacustris and Carex stricta, seed germination decreased significantly by about 50 to 100% in all 8 storage treatments. Germination of Carex stipata seed washighest in 1 cm of standing water, and its seed did not germinate inthe driest soil moisture treatment. Carex stricta seed germination was not affected very much by soil moistures. No Carex spp. were recruited from seed in any of the field soil-amendment treatment plots. Inboth the greenhouse and field, the addition of compost, topsoil, andfertilizer increased the growth of Carex stricta. In a greenhouse study, above ground, below ground, and total dry mass increased linearly with the percent compost added. Our results suggest that the probability of establishing Carex spp. from seed in created and restored wetlands in the Upper Midwest would be maximized by using fresh seed, preferably seed produced earlier in the same growing season; by keeping soil moisture levels as high as possible; and by raising the soil9sorganic matter content, if need be, through the use of suitable soilamendments to levels found in natural sedge meadows.
- Subjects
BOTANY; GERMINATION; PLANT growth; SOIL chemistry; WETLANDS; SEEDLINGS
- Publication
Wetlands, 1999, Vol 19, Issue 4, p756
- ISSN
0277-5212
- Publication type
Article