1 / 8

Aquatic Plants

Aquatic Plants. The Flowering Plants That have returned to Aquatic Environments. Why go back to the water? . Support from water Less need for strong, thickened stems Must be flexible to move with currents or waves Therefore they are all herbaceous (no shrubs/trees)

step
Télécharger la présentation

Aquatic Plants

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Aquatic Plants The Flowering Plants That have returned to Aquatic Environments

  2. Why go back to the water? • Support from water • Less need for strong, thickened stems • Must be flexible to move with currents or waves • Therefore they are all herbaceous (no shrubs/trees) • Protection in the water • Water as a medium for sexual reproduction • Emergent option (feet in the water, heads in the air) • Earth has a lot of water (marine, fresh, and brackish) • 79 families and 380 genera have made the switch!

  3. Adaptations • Leaves • Often long and narrow, with a central cluster or non-thickening conducting tubes • Stems • Spongy stem tissue through which gases can diffuse • To help ‘pump’ oxygen to the submerged roots • Roots • May have tuber-producing rhizomes • Flowers • Pollination and seed dispersal via insects and wind/water • Pollen grains are thread-like, why do you think this is?

  4. Asexual Reproduction • Very important in aquatic plants! • Resulting in extensive ‘clones’ of genetically identical plants in the surrounding area

  5. Who uses them? • Aquatic Food Webs • Fed upon by aquatic organisms (or indirectly) • Provide habitat or hunting areas • By blocking sunlight, the keep algae blooms down • Human Uses • Materials for food • Clothes, mats and baskets • Removal of invasive species, which choke waterways

  6. BC Native • Yellow Pond Lily • Nupharpolysepalum

  7. BC Native • Common Eel-Grass (Zostera marina) • The flowers are released to float upwards, cool eh?

  8. Our Bio11 Floaters! • Water Hyacinth • Water Lettuce • Take a sample to draw in actual size • Then view plant tissues with microscopes • Complete a sketch of the field of view for close up of leaves, stems, and roots • This will be handed in by tomrorow • Come after school for more microscope time

More Related