Náttúrufræðingurinn - 2010, Blaðsíða 109

109
Tímarit Hins íslenska náttúrufræðifélags
Þakkir
Gunnar Stefánsson prófessor aðstoðaði við útreikninga og útfærslu á þumal-
fingursreglu Briggs (3. mynd). Kristín Svavarsdóttir, Árni Einarsson, Helgi
Björnsson og Ingibjörg Svala Jónsdóttir lásu greinina yfir og komu með
góðar ábendingar og leiðréttingar. Þeim eru öllum færðar þakkir fyrir.
Heim ild ir
Brochmann, C., Gabrielsen, T.M., Nordal, I., Landvik, J.Y. & Elven, R. 1.
2003. Glacial survival or tabula rasa? The history of North Atlantic
biota revisited. Taxon 52. 417–450.
Hafdís Hanna Ægisdóttir & Þóra Ellen Þórhallsdóttir 2005. Theories 2.
on migration and history of the North-Atlantic flora. A review. Jökull
54. 1–16.
Willig, M.R., Kaufman, D.M. & Stevens, R.D. 2003. Latitudinal gradi-3.
ents of biodiversity: Pattern, process, scale and synthesis. Annual
Review of Ecology and Systematics 34. 273–309.
ACIA 2005. Arctic Climate Impact Assessment. Cambridge University 4.
Press. 1042 bls.
Grundt, H.H., Kjölner, S., Borgen, L., Rieseberg, L.H. & Brochmann, C. 5.
2006. High biological species diversity in the arctic flora. Proceedings
of the National Academy of Sciences 103. 972–975.
Gaston, K.J. 2000. Global patterns in biodiversity. Nature 405. 220–227.6.
Hawkins, B.A., Field, R., Cornell, H.V., Currie, D.J., Guégan, J.-F., 7.
Kaufmann, D.M., Kerr, J.T., Mittelbach, G.G., Oberdorff, T., O’Brien,
E.M., Porter, E.E. & Turner, J.R.G. 2003. Energy, water, and broad-scale
geographic patterns of species richness. Ecology 84. 3105–3117.
Kreft, H. & Jetz, W. 2007. Global patterns and determinants of vascu-8.
lar plant diversity. Proceedings of the National Academy of Sciences
104. 5925–30.
Walker, M.D. 1995. Patterns and causes of arctic plant community 9.
diversity. Í: Arctic and Alpine Biodiversity: Patterns, Causes and Eco-
system Consequences (ritstj. Chapin, F.S. & Körner, C.H.). Springer
Verlag, Berlín. Bls. 3–17.
Longton, R.E. 1988. Biology of polar bryophytes and lichens. Cambridge 10.
University Press, Cambridge. 391 bls.
Takhtajan, A. 1986. Floristic Regions of the World. Translated into 11.
English by T.J. Crovello. University Press of California. 522 bls.
Elvebakk, A., Elven, R. & Razhivin, V.Y. 1999. Delimitation, zonal and 12.
sectorial subdivision of the arctic for the Panarctic Flora Project. Í: The
Species Concept in the High North: A Panarctic Flora Initiative (ritstj.
Nordal, I. & Razzihivin, V.Y.). The Norwegian Academy of Science
and Letters. Oslo. Bls. 375–386.
CAVM Team 2003. Circumpolar Arctic Vegetation Map. Scale 13.
1:7,500,000. Conservation of Arctic Flora and Fauna (CAFF) Map No.1.
U.S. Fish and Wildlife Service, Anchorage, Alaska.
Whittaker, R.J. & Fernández-Palacios, J.M. 2007. Island Biogeography. 14.
Ecology, evolution, and conservation. Oxford University Press. 401 bls.
Friðgeir Grímsson, Denk, T. & Leifur A. Símonarson 2007. Middle 15.
Miocene floras of Iceland – the early colonization of an island? Review
of Paleobotany and Palynology 144. 181–219.
Tiffney, B.H. & Manchester, S.R. 2001. The use of geological and pale-16.
ontological evidence in evaluation plant phylogeographic hypotheses
in the northern hemisphere tertiary. International Journal of Plant
Sciences, 162, No 6. Supplement. S3–S17.
Aleksandrova, V.D. 1988. Polar Desert Vegetation of the USSR. Þýtt á 17.
ensku úr rússneskri útgáfu 1983 af Doris Löve. Cambridge University
Press, Cambridge.
MacArthur, R.H. & Wilson, E.O. 1963. An equilibrium theory of insu-18.
lar zoogeography. Evolution 17. 373–87.
MacArthur, R.H. & Wilson, E.O. 1967. The theory of island biogeography. 19.
Princeton University Press. 224 bls.
Gillespie, R.G. & Roderick, G.K. 2002. Arthropods on islands: Coloni-20.
zation, speciation, and conservation. Annual Review of Entomology.
47, 595–7632.
Michaux, B. & Leschen, R.A.B. 2005. East meets west: biogeology of 21.
the Campbell Plateau. Biological Journal of the Linnean Society 86.
95–115.
Williamson, M.H. 1981. Island Populations. Oxford University Press, 22.
Oxford. 298 bls.
Heany, L.R. 2007. Is a new paradigm emerging for oceanic island 23.
biogeography? Journal of Biogeography 34. 753–757.
Cowie, R.H. & Holland, B.S. 2006. Dispersal is fundamental to bioge-24.
ography and the evolution of biodiversity on oceanic islands. Journal
of Biogeography 33. 193–198.
Nathan, R. 2006. Long-distance dispersal research: building a network 25.
of yellow brick roads. Diversity and Distributions 11. 125–130.
Whittaker, R.J., Triantis, K.A. & Ladle, R.J. 2008. A general dynamic 26.
theory of oceanic island biogeography. Journal of Biogeography 35.
977–994.
http://www.vedur.is/Medaltalstoflur-txt/Reykjavik_001_med6190.txt27.
Van der Putten, N., Verbruggen, C., Ochyra, R., Verleyen, E. & Frenot, 28.
Y. 2010. Subantarctic flowering plants: pre-glacial survivors or post-
glacial immigrants? Journal of Biogeography 37. 582–592.
Davis, S.S., Heywood, V.H., Herrera-MacBryde, O., Villa Lobos, J. & 29.
Hamilton A.C. (ritstj.) 1994–97. Centres of Plant Diversity. A Guide
and Strategy for their Conservation, I.–III. bindi. WWF & IUCN.
Böcher, T.W. & Petersen, P.M. 1997. Greenland. Í: Polar and Alpine 30.
Tundra (ritstj. Wielgolaski, F.E.). Ecosystems of the World 3. Elsevier,
Amsterdam. Bls. 685–720.
Válisti 1. Plöntur, 1996. Náttúrufræðistofnun Íslands, Reykjavík. 82 31.
bls.
Elvebakk, A. 1997. Tundra Diversity and Ecological Characteristics of 32.
Svalbard. Í: Polar and Alpine Tundra (ritstj. Wielgolaski, F.E.). Ecosys-
tems of the World 3. Elsevier, Amsterdam. Bls. 347–359.
UNESCO World Heritage Center, 2005 http://whc.unesco33. .org/ og á
heimasíðu Wrangel-eyju, http://whc.unesco.org/pg.cfm?cid=31&id_
site=1023&l=en.
Fosaa, A.M. 2000. Villar plantur i Föroyum – yvirlit. Föroya Náttúru-34.
gripasavn. 24 bls.
McGlone, M.S. 2002. The Late Quaternary peat, vegetation and climate 35.
history of the Southern Oceanic Islands of New Zealand. Quaternary
Science Reviews 21. 683–707.
Moore, D.M. 1968. The Vascular Flora of the Falkland Islands. British 36.
Antarctic Survey Scientific Reports no 60. British Antarctic Survey,
London. 202 bls.
Wardle, P. 1991. Vegetation of New Zealand. Cambridge University 37.
Press, Cambridge. 672 bls.
Selkirk, P.M, Seppelt, R.D. & Selkirk, D.R. 1990. Subantarctic Mac-38.
quarie Island: Environment and Biology. Cambridge University Press,
Cambridge. 285 bls.
Chown, S.L., Gremmen, N.J.M. & Gaston, K.J. 1998. Ecological biogeog-39.
raphy of southern ocean islands: species-area relationships, human
impacts and conservation. The American Naturalist 152. 562–575.
Selmi, S. & Boulinier, T. 2001. Ecological biogeography of Southern 40.
Ocean Islands: The importance of considering spatial issues. The
American Naturalist 158. 426–437.
Briggs, J.C. 1995. Global Biogeography. Developments in Paleontology 41.
and Stratigraphy 14. Elsevier, Amsterdam. 452 bls.
Lawson, I.T., Edwards, K.J., Church, M.J., Newton, A.J., Cook, G.T., 42.
Gathorne-Hardy, F.J. & Dugmore, A.J. 2008. Human impact on an
island ecosystem: pollen data from Sandoy, Faroe Islands. Journal of
Biogeography 35. 1130–1152.
acaulis61) og bláberjalyngi (Vaccin-
ium uliginosum62). Þetta gildir raun-
ar ekki bara um Ísland því þessar
erfðafræðilegu rannsóknir benda
til þess að háplöntuflóran við norð-
anvert Atlantshaf hafi borist þang-
að eftir ísöld.1
Í þessari grein hafa verið tal-
in upp ýmis rök sem benda til
skammrar sögu núverandi flóru á
Íslandi en ekkert fjallað um þau sem
benda til hins gagnstæða, þ.e. að
hér hafi hluti lífríkis hjarað a.m.k.
síðasta jökulskeið. Bjarni K. Krist-
jánsson og Jörundur Svavarsson
telja að hellamarflærnar sem áður
var minnst á kunni að hafa lifað ís-
öldina af neðanjarðar.63 Þá hefur
verið bent á að plöntur virðast hafa
numið land hratt eftir að ísa leysti og
sæmilega fjölskrúðugur gróður birt-
ist tiltölulega fljótt.64,65 Gróður náði
að breiðast út á skammvinnu hlý-
skeiði, kenndu við Alleröd/Bölling,
áður en jöklar stækkuðu á ný í loka-
fjörkipp síðasta jökulskeiðs (yngra
Dryas-skeiði, 10,3 Ka BP).66 Það er
ekki víst að úr því fáist nokkurn
tímann skorið með óyggjandi hætti
hvort einhverjar háplöntur tórðu
hér af ísöld eða síðasta hluta hennar.
Hitt virðist að minnsta kosti ljóst að
núverandi flóra ber sjálf ekki merki
langrar sögu í landinu.
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