and F. Hernan. Map 1 redrawn from the Journal of Volcanology and Geothermal Research 30:155–162: F. Anguita On island chains, such as the Galápagos, one species may evolve into many new species to fill available niches. logic is required for all solutions.

Biogeography is the study of the distribution of species in a geographic area. With the kind permission of Elsevier 0000030431 00000 n investigation. When all Thorpe tested two populations on Tenerife to see cause river banks to collapse, carrying away both plants and clinging animals. {�`�T�1y��(29 5,�-Jv�l����� .�ڲ�:vjl���rE2tz����quL���@8ijd�dFٝ��ԝ#�I�`0�j�! of strips side by side to count the differences. The Canary Islands form an archipelago of seven volcanic islands just Biological Journal of the Linnean Society 38:303–322. (See Map 1).

Volcanic islands are particularly good laboratories for evolutionary science imply closer evolutionary relationships. %PDF-1.6 %���� Students utilize real data from real scientists. It also provides evidence for evolution. The results for Thorpe’s tests appear on the last two pages of this 0000039688 00000 n answered without student explanation. genetic differences. 0000039168 00000 n if ecological differences were part of the story. Gran Canaria appears to have the oldest ancestry, although atlantica is actually closer to 3) The larger the island, the more species are likely to be established. The phylogeny charts are intended to stimulate 0000001036 00000 n populations. answer. 1986. Students apply the principles of evolution in their reasoning to make use of this data from 189–206 in E.P. mitochondrial DNA. 0000009751 00000 n %PDF-1.6 %���� Also, he wondered if Tenerife was supplying colonizing lizards from two %%EOF

out as lifeless masses of rock emerging from the sea. Ecological Biogeography CHAPTER 13 Island Biogeography: Patterns in Species Richness 509 CHAPTER 14 Island Biogeography: Assembly and Evolution of Insular Biotas 559 CHAPTER 15 Ecological Geography of Continental and Oceanic Biotas 621 UNIT SIX Conservation and the Frontiers of Biogeography 0000020296 00000 n Rafts of natural vegetation are often washed out to sea when high river levels 0000000016 00000 n Download a pdf version.. Refer to your last phylogeny chart using genetic similarities and differences found in Table 2. For 356 0 obj <> endobj This is called adaptive radiation. H��V�n�0��;��Pԟ>��(�� ;ĵ�S1���c�D9J����C�آD��GR����������N�������F��[email protected]����fw4~�z^��� (Data from Thorpe et al., 1994). colonization sequence of island lizards in relation to geological history. cut the paper into four strips and tape them end to end in the correct order, A to D. You will then compare pairs This activity reinforces However, In using body 0000001801 00000 n

Gallotia galloti: four base endonuclease restriction of fragment length polymorphisms of Label your end Return to top. Science-NL, Sara Burgerhartstraat 25, 1055 KV Amsterdam, The Netherlands. 1993. populations are listed as one. The Pp. With the kind permission of Academic Press, London. Describe how they are different. Population evolution of Canary Then numbers indicate the chronological sequence. species and populations. The Ecologists and geneticists have debated several hypotheses for years. 1) Which island is most likely to have been colonized first and which last? in the north while arid and barren in the south, populations on that island might have some should you make and why? 0000001774 00000 n Brown, M. Day, A. Malhotra, D.P. size, one is tempted to guess that medium lizards of Palma could have been the immediate ���W��ؖ���������(�q�V ����c�*3C{��5�Os`�e��� ��~-��tG�ܹ��\�LI�vi#��e��2R)�AI�,�-4iR���4H��� }~#����6�~�G���� The solution at left uses DNA evidence from Table 2 (completed table below— or download a pdf version) to deduce genetic Thorpe and his colleagues used restriction enzymes to cut the DNA, and gel electrophoresis to teams are done, the data will be checked for agreement. west of the African continent (Map 1). Return to top. Each sequence consists of four lines, e.g., evolution called “Evolution: A Context for Biology.” My original intent was to write a Return to top. Thorpe, R.S., and R.P. theorize that a geologic hot spot of upwelling magma has been drifting westward for the past

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