AMY WELSH WEST VIRGINIA UNIVERSITY GENETIC CONSIDERATIONS IN ECOSYSTEM RESTORATION.

Slides:

Advertisements

Similar presentations

Evolutionary Change in Populations

Advertisements

Gene flow is the movement of alleles between populations.

The Five Factors of Evolution

Captive breeding programs Peter de Sève. Saving species Assuming a decline is already well under way: what to do? - remove threats (harvest regulation,

Habitat Fragmentation 1. A reduction in total area 2. Creation of separate isolated patches from a larger continuous distribution 3. Leads to overall reduction.

Hardy-Weinberg equilibrium if p = frequency of allele A q = frequency of allele a p + q = 1, ( p + q ) 2 = 1 p 2 + 2pq + q 2 = 1 if only law of probability.

Microevolution Chapter 18 contined. Microevolution  Generation to generation  Changes in allele frequencies within a population  Causes: Nonrandom.

Smaller populations, larger frequency change? What about allele size effects What about environmental variation Are large populations limited to one peak.

Population Genetics I. Evolution: process of change in allele

Genetics The rate of evolutionary change in a population is proportional to the amount of genetic diversity available.

Population Genetics A.The Hardy-Weinberg principle B.Factors that can change allele frequencies.

BIOE 109 Summer 2009 Lecture 6- Part I Microevolution – Random genetic drift.

1 Midterm Exam: Weds. 15 March what’s covered on the test? Lecture material through 14 March Text reading assignments.

Population Genetics What is population genetics?

Inbreeding. inbreeding coefficient F – probability that given alleles are identical by descent - note: homozygotes may arise in population from unrelated.

Salit Kark Department of Evolution, Systematics and Ecology The Silberman Institute of Life Sciences The Hebrew University of Jerusalem Conservation Biology.

KEY CONCEPT A population shares a common gene pool.

PROCESS OF EVOLUTION I (Genetic Context). Since the Time of Darwin  Darwin did not explain how variation originates or passed on  The genetic principles.

2: Population genetics. Problem of small population size Small populations are less fit (more vulnerable) than large populations.

What is Conservation Genetics? -- Application of

Biodiversity IV: genetics and conservation

Population Genetics Reconciling Darwin & Mendel. Darwin Darwin’s main idea (evolution), was accepted But not the mechanism (natural selection) –Scientists.

The plant of the day Welwitschia is a monotypic gymnosperm genus

Natural Selection Developed by Charles Darwin in 1859

Breed conservation - secure D. PHILLIP SPONENBERG, DVM, PHD VIRGINIA-MARYLAND REGIONAL COLLEGE OF VETERINARY MEDICINE VIRGINIA TECH, BLACKSBURG, VA AND.

Reintroductions & Translocations Continue to be an important tool in wildlife management.

Gene flow is the movement of alleles between populations.

Population Genetic Hardy-Wienberg Law Genetic drift Inbreeding Genetic Bottleneck Outbreeding Founder event Effective population size Gene flow.

IT’S ALL GENETIC…. Get my drift? Founder effect When a new population is started by only a few individuals some rare alleles may be at high frequency;

KEY CONCEPT Natural selection is not the only mechanism through which populations evolve. Five factors that can lead to evolution.

Section 8 Genetically Viable Populations Habitat loss = loss of living space for threatened and endangered species. mammals56% birds53% reptiles62% amphibians64%

BIOLOGY 30 POPULATION GENETICS. CHAPTER OUTCOMES Define a gene pool. Describe the gene pool of a population at genetic equilibrium. Summarize the five.

Chapter 5 Characterizing Genetic Diversity: Quantitative Variation Quantitative (metric or polygenic) characters of Most concern to conservation biology.

Tier 1 Avoid population extinction using captive technology. Conserve population genetic diversity. Increase the number of individuals in the population.

Genetic consequences of small population size Chapter 4

NGSSS SC.912.L.15.14* Discuss mechanisms of evolutionary change other than natural selection such as genetic drift and gene flow. (MODERATE)

Mechanisms of Evolution & their Effects on Populations.

Mechanisms of Evolution 16.1 Causes of microevolution.

blank  The Movement of Alleles  The Movement of Alleles Migration and Inter-breeding.

Section 6 Maintenance of Genetic Diversity Levels of genetic diversity result from the joint impacts of: Mutation & migration adding variation Chance &

The plant of the day Bristlecone pine - Two species Pinus aristata (CO, NM, AZ), Pinus longaeva (UT, NV, CA) Thought to reach an age far greater than any.

AP Biology Evolution of Populations AP Biology Populations evolve  Natural selection acts on individuals  differential survival  “survival.

Evolution and Population GENETICS

Conservation Genetics

MECHANISMS FOR EVOLUTION DO POPULATIONS OR INDIVIDUALS EVOLVE? DO POPULATIONS OR INDIVIDUALS EVOLVE? WHAT IS A GENE POOL WHAT IS A GENE POOL HOW CAN THE.

Gene Flow   Aims:   Must be able to outline, with examples, genetic drift.   Should be able to explain what population bottlenecks are, and their.

The plant of the day Pinus longaevaPinus aristata.

11.3 Other Mechanisms of Evolution KEY CONCEPT Natural selection is not the only mechanism through which populations evolve.

Shaping Evolutionary Theory

Topics How to track evolution – allele frequencies

Chapter 23 Notes: Population Genetics.

Gene flow is the movement of alleles between populations.

Mechanisms of Evolution

Evolutionary Change in Populations

Introduction to Population Genetics

Gene flow is the movement of alleles between populations.

Mechanisms of Evolution

Evolutionary Mechanisms

Evolutionary Mechanisms

GENE POOL All the genes of all members of a particular population.

Gene flow is the movement of alleles between populations.

Gene flow is the movement of alleles between populations.

Mechanisms of Evolution

16-2 Evolution as Genetic Change

Copyright Pearson Prentice Hall

Gene flow is the movement of alleles between populations.

Evolutionary Processes

Vocab #21 Mr. Addeo.

Gene flow is the movement of alleles between populations.

Gene flow is the movement of alleles between populations.

Presentation transcript:

AMY WELSH WEST VIRGINIA UNIVERSITY GENETIC CONSIDERATIONS IN ECOSYSTEM RESTORATION

GENETIC GOAL OF RESTORATION Avoid inbreeding in the short term Maintain long-term evolutionary potential HIGH GENETIC DIVERSITY

SOURCES OF GENETIC CHANGE Migration Selection Drift Mutation

MIGRATION Natural Colonization Natural migration pattern Few genetic consequences Translocation Source population???? Considerations: Adapted to new environment? Founder effect Effects on source population Outbreeding depression

EXAMPLE: LAKE STURGEON Identification of Genetic Stocking Units (GSUs)

SELECTION Founding individuals/populations Adaptation to captivity

GENETIC DRIFT Founder effect Inbreeding

EFFECTIVE POPULATION SIZE Size of an ideal population that loses genetic diversity at the same rate as the actual population Ideal population: Equal sex ratios Equal family sizes Constant population size

RECOMMENDATIONS Natural colonization (when possible) Select source population from similar environment & genetically similar Large number of founders Minimize time in captivity Natural captive environment Avoid inbreeding Maximize effective population size

CRITERIA FOR SUCCESS Avoid inbreeding in the short term Maintain long-term evolutionary potential HIGH GENETIC DIVERSITY MONITORING