Threats to Biodiversity: - Fort Lewis College

Threats to Biodiversity: A Case Study of Hawaiian Birds Biological Diversity of the Hawaiian Islands Why are the islands so unique, and so diverse?

Why are the islands so unique, and so diverse? Most isolated islands in the world o 2500 miles from N. America! o 3900 miles from Asia! 40 million years old

How often might a colonization event occur? o Every 20-40,000 years! o Evolutionary radiations Large elevation change o Sea level to 14,000! Why are the islands so unique, and so diverse?

As a result of all of these variables, Hawaii is home to many endemic species Is Biodiversity threatened in Hawaii? Species that are globally critically imperiled (less than 1,000 individuals remaining) or globally imperiled (1,000-3,000 individuals

remaining): 30 vertebrates, 102 invertebrates, 515 plants New Jersey (about same size as Hawaii): 3 vertebrates, 14 invertebrates, 21 plants Why are the native species so threatened? No native mammalian predators

No native large grazers No native diseases Hawaiis Native Birds Very diverse In steep decline

Case Study: Threats to diversity of native Hawaiian Birds modified from an exercise by Sarah K. Huber, Organismic and Evolutionary Biology, University of Massachusetts at Amherst Paula P. Lemons, Biology Department, Duke University

Case Study: 1. Examine the data presented in Table 1. How many of these species are currently extinct? What other trends do you notice? What factors might contribute to these trends? Case Study:

2. A) One factor that leads to a decline in biodiversity is the introduction of non-native species. However, most species that are introduced to an area do not become established. What are some characteristics of species that might make them more likely to thrive in a new habitat?

Case Study: 2. B) What are some ways that non-native species could impact natives? List on board possible types of interactions that could be involved. Case Study: 3. Several species of large rats arrived to Hawaii

as stowaways on ships. These rats live in a variety of habitats and eat a variety of foods, both plants and animals. Speculate about how these introduced rats could directly and indirectly affect native bird species. Case Study: 4. Researchers hypothesize that several factors may

affect the extent of predation by rats on birds. These factors include: o bird size o nesting site o amount of time young spend in the nest (duration of egg incubation and nestling period) Formulate hypotheses about how these factors

might affect predation. Case Study: 5. Examine the data given to you (Table 2a, 2b, or 2c each group analyze one set of data). Do the data support or refute your hypothesis? Can you summarize the data with a graph, or

in some other way? Bring the results of your group discussions to class next time. Case Study: Rats are not the only invaders impacting bird diversity in Hawaii For next class period, draw a model/diagram that shows

how these other invasive species interact with each other to cause extinctions in native birds: Mosquitos Cattle Mongoose Wild pigs Exotic plants (like Banana Poka)

You may use this website for more background:

Recently Viewed Presentations

  • ILC Cryogenic Systems - ILC Agenda (Indico)

    ILC Cryogenic Systems - ILC Agenda (Indico)

    T. Peterson M. Geynisman, A. Klebaner, V. Parma, L. Tavian, J. Theilacker 20 July 2007 Reference Design A Global Design Effort (GDE) began in 2005 to study a TeV scale electron-po
  • How to write a paragraph

    How to write a paragraph

    2. 5 or more sentences (supporting details) 3. a concluding sentence . How to write a paragraph. Topic sentence. 1. State your main idea for the paragraph. 2. Has to capture the reader's interest. What is wrong with these topic...
  • Listening - COMMClub

    Listening - COMMClub

    Listening is an active process of selecting, attending to, interpreting and remembering sounds. Selecting essentially refers to becoming aware of and choosing a given sound among many competing sounds. Attending involves consciously focusing on sounds because they are interesting, expected,...
  • Synchrotron-light for Experimental Science and Applications in the

    Synchrotron-light for Experimental Science and Applications in the

    2- 4 identical standard consols (bays 1-4) without any special software or hardware (provide the same functionality, no special purpose consols), each with 4 display monitors . 7- A meetings table is very useful for operation or commisioning meetings. For...
  • 3856535 - Amazon S3

    3856535 - Amazon S3

    Microencapsulation is a process by which very tiny droplets or particles of liquid or solid material are surrounded or coated withacontinuous film of . polymeric material. The product obtained by this process is called as micro particles, microcapsules. Particles having...
  • Medicine, Nursing and Health Sciences School of Public

    Medicine, Nursing and Health Sciences School of Public

    Title: Slide 1 Author: Catherine Last modified by: yhodgson Created Date: 10/18/2011 3:49:54 AM Document presentation format: On-screen Show (4:3) Company
  • 1  30131  (Nomenclature)  28  25 2 cations -

    1 30131 (Nomenclature) 28 25 2 cations -

    Cl Name: Iron (II) chloride You try: CuCl Cr2O3 * * การเรียกชื่อเขียนสูตร สารประกอบไอออนิก อ.ศราวุทธ Writing formulas for Binary Ionic Compounds with Transition Metals The roman numeral in the compound name gives the oxidation number of the metal ion.
  • Section A: Introducing e Geogebra Tutorial: Graphing 2x

    Section A: Introducing e Geogebra Tutorial: Graphing 2x

    The Swiss mathematician Euler was the first to use the notation e for this irrational number in 1731. Use your calculators to find an approximate value for e. Lesson interaction. rit. 19/10/2012. Section A. Geogebra Tutorial. Index. Introduction.