Skógræktarritið - 15.05.2001, Page 184
through several filters in the
pathway of regeneration. As pre-
sented, the particular plant trait
may be an advantage in some
phases and a disadvantage in
another. In an alpine meadow,
several changes happen in the
relative proportions of growth
References
ARCHIBOLD, O. W. 1984. A compari-
son of seed reserves in arctic, sub-
arctic and alpine soils. Can. Field-
Nat. 98: 337-344.
ARCHIBOLD, O. W. 1995. Ecology of
World Vegetation. London.
Chapman & Hall. 510 pp.
BILLINGS, W. D. 1974. Arctic and
alpine vegetation: plant adapta-
tions to cold summer ciimates. In:
ives, J. D. and Barry, R. G. (eds.),
Arctic and Alpine environments,
pp. 403-443. London, Methuen.
Bliss, L. C. 1971. Arcticand alpine
plant life cycles. Ann. Rev. Ecol.
Syst. 2: 405-438.
CHAMBERS, J. C. 1993. Seed and veg-
etation dynamics in alpine herb
field: effects of disturbance type.
Can. J. Bot. 71: 471-485.
CHAMBERS, J. C. 1995. Disturbance,
life history, and seed fates in
alpine herbfield communities. Am.
J. Bot. 82: 421-433.
CHAMBERS, J. C., MACMAHON, J. A.
and BROWN, R. W. 1991. Alpine
seedling establishment: the influ-
ence of disturbance type. Ecoiogy
71: 1323-1341.
ERIKSSON, O. 1992. Evolution of
seed dispersal and recruitment in
clonal plants. Oikos 63: 439-448.
FOX, J. F. 1983. Germinable seed
banks of interior Alaskan tundra.
Arct. Alp. Res. 15: 405-411.
FREEDMAN, B., HILL, N., SVOBODA,
|. and HENRY, G. 1982. Seed banks
and seedling occurence in a high
Arctic oasis at Alexandra Fjord,
Ellesmere Island, Canada. Can. J.
Bot. 60: 2112-2118.
GRIME, J. P., MASON, A. G„ CURTIS,
A. V„ RODMAN, J„ BAND, S. R„
MOWFORTH, M. A. G„ NEAL, A. M.
and SHAW, S. 1981. A comparative
study of germination characteristics
in a local flora. Journal of Ecology
69: 1017-1059.
forms, states of clonality, dias-
pore morphologies and seed
sizes across the regeneration
pathway, partly in an expected
way (Welling and Laine b, in
prep.). These changes are the
reasons for relatively low floristic
similarity between the consecu-
JOHNSON, E. A. 1975. Buried seed
populations in the subarctic forest
east of Great Slave Lake, Norhwest
Territories. Can. J. Bot. 53: 2933-
2941.
KIVINIEMl, K. 1999. Evolution of seed
attributes, dispersal and popula-
tion dynamics of plants, with spe-
cial emphasis on fragmented habi-
tats. Doct. Diss. Department of
Botany, Stockholm University.
MCGRAW, J. B. and SHAVER, G. R.
1982. Seedling density and seeling
survival in Alaskan cotton grass tus-
sock tundra. Hol. Ecol. 5: 212-217.
MOLAU, U. and LARSSON, E.-L. 2000.
Seed rain and seed bank along an
alpine altitudinal gradient in
Swedish Lapland. Can. J. Bot. 78:
728-747.
ROACH, D. A. 1983. Buried viable
seed and standing vegetation in
two tundra habitats, northern
Alaska. Oecologia 60: 359-364.
SCHUPP, E. W. 1995. Seed-seedling
conflicts, habitat choice, and pat-
terns of plant recruitment. Am. J.
Bot. 82: 399-409.
SHUTZ, W. and RAVE, C. 1999. The
effects of cold stratification and
light on the seed germination of
temperate sedges (Carex) from vari-
ous habitats and implications for
regenerative strategies. Plant
Ecology 144: 215-230.
SEMENOVA, G. V. and ONIPCHENKO,
V. G. 1993. Soil seed banks. In:
Onipchenko, G. and BLINNIKOV,
M. S. (eds.J, Experimental investi-
gation ofalpine plant communities
in the Northwest Caucasus.
Veröffentlichungen des
Geobotanischen institutes der
Eidg. Tech. Hochschule, Stftung
Rubel, in Ziirich, I 15. Heft,
pp. 69-82.
SIMPSON, R. L„ LECK, M. A. and
PARKER, V. P. 1989. Seed banks:
tive regeneration phases in the
regeneration pathway. However,
despite this low similarity, aclon-
al plants dominate the standing
vegetation. This indicates that
regeneration by seed is effective
in this community.
General concepts and methodolog-
ical issues. In : Leck, M. A„ Parker,
V. T. and Simpson, R. L. (eds.l.
Ecology of soil seed banks, pp. 3-8.
SÖYRINKI, N. 1938. Studien uberdie
generative und vegetative
Vermehrung der Samenpflanzen in
der Alpinen Vegetation Petsamo
Laplands. I. AllgemeinerTeil. -
Diss. University of Helsinki,
Helsinki. 31 i pp.
THOMPSON, K. 1978. The occurrence
of buried viable seeds in relation
to environmental gradients.).
Biogeogr. 5: 425-430.
THOMPSON, K„ BAKKER, J. P.
BEKKER, R. M. and HODGSON, J.
G. 1998. Ecological correlates of
seed persistence in soil in the
northwest European flora.). Ecol.
86: 163-169.
WAGER, H. G. 1938. Growth and sur-
vival of plants in the Arctic. J. Ecol.
26: 390-410.
WELLING, P. 2000. Characteristics of
seedling flora and soil seed bank
in alpine vegetation, subartic
Finland. Licentiate Thesis.
University of Oulu.
WELLING, P. and LAINE, K. 2000.
Characteristics of the seedling flora
in alpine vegetation, subarctic
Finland. I. Seedling densities in 15
plant communities. Ann. Bot. Fenn.
37: 69-76.
WELLING, P. and LAINE, K. a. The
pathways of regeneration in two
alpine plant communities. I. The
early regeneration of plant cover.
MS.
WELLING, P. and LAINE, K. b. The
pathways of regeneration in two
alpine plant communities. II.
Quantitative plant trait spectra in
standing vegetation and changes in
the plant traits across the pathway
of regeneration. MS.
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