Attack of the Aquatic Habitat Snatchers - University of Arizona

Attack of the Aquatic Habitat Snatchers By: Cynthia Ribitzki For: SWES 474 Aquatic Habitat Snatchers Alter the surrounding ecosystem by Changing surround benthic and pelagic animal communities Displacing native plants Shifting chemical processes (i.e. like the nutrient cycle) Changing sediment characteristics and

deposition Tamarix (Salt Cedar) Eliminates surface water, lowering the local water table Increases salinity of soil

Tolerates up to 36,000ppm Increases frequency, intensity, and effect of fires and floods Melaleuca Quinquenervia (Melaleuca) Turning River of Grass into River of

Trees In 50 years, it has taken over hundreds of thousands of acres of Everglades Typha Angustifolia

Displaces native plants Impedes water flow Increases sedimentation Changes sediment chemistry Green Areas indicate Typha regions Eichhornia Crassipes (Water Hyacinth)

an acre of water hyacinth can weigh more than 200 tons; infestations can be many, many acres in size; mats may double their size in as little as 6-18 days Ill enlighten you on the problems this can cause. Myriophyllum Spicatum (Eurasian water-milfoil)

Explosive growth during early colonization Forms dense mats Reduces food quality Reduces oxygen levels in water

Hydrilla verticillata (Hydrilla) One square meter of hydrilla can produce 5,000 tubers. Tubers can withstand ice cover, drying, herbicides, and ingestion and regurgitation by waterfowl.

Once hydrilla becomes established, it is readily spread by waterfowl and boating activities. Growth creates dense mats Promotes anoxia Limits movement of predatory species Spartina Alterniflora (Smooth Cord Grass) Ecosystem Engineers

The San Francisco INVASION The European INVASION S. Alterniflora (cont.) Ecosystem Engineering The indirect or direct control of resource availability mediated by an organisms ability to cause physical state changes in abiotic or biotic materials in essence the creation,

destruction, or modification of habitats. -(Crooks 2002) S. Alterniflora vs. S. Foliosa S. foliosa is the native species of cordgrass in the San Francisco Bay area. S. alterniflora was introduced in the mid-1970s.

60 cm taller Produces almost 10-fold the above ground biomass Higher potential for sexual reproduction Spreads laterally 1.5 times faster The S. Alterniflora Invasion Continues

Impedes water flow Causes threat of channel blockage in narrow up-river channels Covers open mud Changes patterns of species diversity The European Invasion: S. anglica is born! S. Alterniflora is the maternal genome donor of S. anglica. This could

explain why S. anglica is covering most of the coast along the British Isles. The Threat of Invasion S. alterniflora has the ability to homogenize biotas across biogeographic realms and alter evolutionary pathways. A few offspring of S. alterniflora can threaten the abundance of plant species

in Europe and the extinction of S. foliosa in the San Francisco bay area, if the hybrids have superior male fitness. Conclusion? Aquatic Habitat Snatchers are running a muck! AGH! Just Kidding! Solutions Suggested Control Methods for S. alterniflora and its hybrids Selectively removing them from native marshes where invasion has not run a muck Herbicide sprays

Monitor un-invaded marshes to prevent future invasions Use only S. foliosa for restoration projects

Recently Viewed Presentations

  • Slide 1

    Slide 1

    Outline EIC Design Specifications Proposed EIC Designs Luminosity Concepts Machine Designs eRHIC ELIC LHeC R&D Required Performance Summary Conclusions EIC Accelerator Design Specifications Various Drivers: High L for spin physics (Ecm ~ 20+ GeV): Polarized H, D, 3He Large Reach...
  • Schedule: Thursday, 2/27 and Tuesday, 3/11 (after break),

    Schedule: Thursday, 2/27 and Tuesday, 3/11 (after break),

    Skinner does not, however, neglect the listener First, Skinner indicates that the listener must learn to reinforce the verbal behavior of the speaker (society teaches the listener how to do this) Second, Skinner explicitly addresses the listener's behavior in several...
  • Title


    The Education Act 2002 requires schools to deliver a broad and balanced curriculum and for preparing young people for adult life. Academies Act 2010 makes the subject 'Citizenship' statutory - to promote interest and understanding in the democratic electoral process,...
  • Cluster Analysis - Tongji University

    Cluster Analysis - Tongji University

    Cluster analysis provides an abstraction from individual data objects to the clusters in which those data objects reside. ... K-means is a prototype-based clustering technique which creates a one-level partitioning of the data objects. ... Bisecting K-means.
  • UC Kappa Alpha Theta (@UCTheta) | Твиттер

    UC Kappa Alpha Theta (@UCTheta) | Твиттер

    Последние твиты от UC Kappa Alpha Theta (@UCTheta). Surround yourself with people who are going to lift you higher ✨ Alpha Tau https Kappa Alpha ThetaПодлинная учетная запись @BettieLocke. "This scholarship means more than a monetary contribution to my future.
  • PowerPoint Presentation

    PowerPoint Presentation

    Through the roof, you might say.") (CLICK) Draw a forecast line going up. This is the forecast of where we're headed if we don't do anything. ... This is your action plan. 9. So now you've implemented your action plan....
  • Snímek 1

    Snímek 1

    * Historie 2 1853 - důkaz krve - Ludvik Karol Teichmann 1880 - využití teploty těla pro určení doby smrti 1883 - bertillonáž - Louis Alphonse Bertillon 1901 - daktyloskopie (Scotland Yard) 1903 - kapalinová chromatografie M.S.Cvet) 1910 - první...