Historical biogeography

KGA172 Space, Place and NaturePresented by Associate Professor Elaine StratfordSemester 2

http://commons.wikimedia.org/wiki/File:Tragopogon_dubius_seedhead1.jpg

LOOKING BACK, LOOKING FORWARD

Part 1

Revising Lecture 2.91. Name and define six elements of

ecosystem function.2. What are the key differences between

habitat and niche? In practical terms, why is it important to understand these differences?

3. Explain the concept ‘potential’ niche. How does that differ from ‘realized’ niche?

4. Name, describe and explain the interrelationships among three key limits on biota, providing examples for each.

5. Using light as your focus, describe and explain the interrelationships among growth, productivity and competition.

6. In what ways is water both an environmental condition and resource?

7. How and why is it important that environmental studies is an area of multi- [and even inter-] disciplinary study?

A Woman Thinking

Learning ObjectivesModule 2 Lecture 10• be able to describe and

explain a range of ideas and cite a range of examples to show understanding of:

– biotic realms

– relicts

– continuous and disjunct

distributions

– centres of local endemism

– pangeographic nodes

– refugia

KGA172• Know and be able to (a) employ basic

geographical terminology and concepts, (b) find, evaluate, analyse and reference appropriate literature, (c) contribute to debates about development and sustainability

• Comprehend and be able to explain spatial patterns, generate basic maps, field sketches and graphs, and communicate in written and graphical forms

• Apply key academic skills and (a) engage in critical thinking, discussion and listening, and in self-reflection and reflection upon the viewpoints of others and (b) research, plan and conduct fieldwork to collect data

• Analyse and interpret basic spatial, numerical and qualitative information

• Synthesize and integrate knowledge of social and Earth systems

Textbook Reading Bergman and Renwick (2008) graze through parts of chapter 4..

Critical reading1.What is the author’s purpose?2.What key questions or problems does the author raise?3.What information, data and evidence does the author present?4.What key concepts does the author use to organize this information, this evidence?5.What key conclusions is the author coming to? Are those conclusions justified? 6.What are the author’s primary assumptions?7.What viewpoints is the author writing from?8.What are the implications of the author’s reasoning?[from Foundation for Critical Thinking]

Old Woman Reading a Lectionary, Gerard Dou

KEY IDEAS IN HISTORICAL BIOGEOGRAPHY

Part 2

Kirkpatrick 1999

Biotic realms

Relicts

Continuous and

disjunct distributions

Centres of local

endemism

Pangeographic nodes

Refugia

Joy Tivy (1982) Biogeography. 2nd ed. Longmans.

Biotic realms

1. Boreal2. Palaeo-

tropical3. Neo-

tropical4. Australian5. Antarctic

influence

www.astrospringville.org

Rel

icts

Continuous and disjunct distributions

Joy Tivy (1982) Biogeography. 2nd ed. Longmans.

Local endemism, pangeographic nodes, and refugia

Myosotis de Bourbon, endemic to Reunion Island

Centres of local endemism

.

Dispersal and migration

Modes of dispersal and their effectiveness

Active dispersal• Flight, perambulation,

swimming

Passive dispersal• wind, water, animal (endozoic and ectozoic)

Dispersal and migration

Martin Kellman (1980). Plant Geography. 2nd ed., Methuen.

Active dispersal

(Slide modified from one by Dr Emma Pharo)

Perambulation

www.kenyatravelideas.com

Swimming[Atlantic Salmon]

(Adapted from slide by Dr Emma Pharo)

Barry Kovish

Passive dispersal - wind

Passive dispersal - Water

Ectozoic and endozoic animal transport

Factors affecting the probability of migration and the theory of island biogeography

Theory of island biogeography

Diagrams from McArthur and Wilson Theory of Island Biogeography

allele A

allele B

allele C

Donn

elly

R

W a r r e n R

Shan

non

R

Gard

ner

R

G . r o s e a r a n g e lim it s

C o a s t

R iv e r

S c a le (k m )

0 2 0

N

L O C A T I O N

Distribution of alleles at the Lgg locus

Donnelly R

W a r r e n R

Shannon R

Gardner R

G . r o s e a r a n g e l i m i t s

C o a s t

R i v e r

S c a l e ( k m )

0 2 0

N

L O C A T I O N

13 2

46

5

13

246

5

132

4 65

132

W

D

G

S

N1

3 2

45 6

Genetic groups within Geocrinia rosea

Don Driscoll

Roseate Froglet, Karri Froglet (Geocrinia rosea)

The Hawaiian islands are a chain of volcanoes some 4,000km from the nearest continental land mass. Shown are the central islands of Kahoolawe, Maui, Lanai, Molokai and Oahu, from lower right to upper left. Source: P McQuillan

Source: P McQuillan

The rates of immigration and extinction differ with island size.

Hence the equilibrium number of species, or species richness (S) differs between large and small islands.

Source: P McQuillan

(unknown)

The breakdown of biotic realms and

kingdoms

Buchanan Bush Regeneration