1 Lina Munsterhjelm & Annika Seppälä 30.9.2008Aquatic Plants Lina Munsterhjelm & Annika Seppälä

2 Aquatic Plants Are plants that have adapted to living in or on aquatic environments Aquatic vascular plants can be ferns or angiosperms Algae are not plants! Produce oxygen in to water systems

3 Some plants grow under water, some float on the surface and some have aerial stemsHydrophytes have smaller need to regulate transpiration due to the abundance of water in its environment Aquatic plants require numerous special adaptations

4 Characteristics of hydrophytes:A thin cuticle Stomata that are open most of the time An increased number of stomata A less rigid structure Flat leaves and air sacs for flotation Smaller and feathery roots Specialized roots able to take in oxygen

5 Aquatic plants in Finland112 species (83 actual aquatic plants and 29 aerial stems) The number of species decreases gradually when going from south to north Plants have to adapt to Finnish winter (low water temperature and freezing)

6 Aquatic plant life forms

7 Aquatic plants with aireal stemsCommon reed, water horsetail, bulrush

8 Leaves under water 2. Water milfoil, perfoliate pondweed, Canadian waterweed

9 Floating leaves 3. Yellow waterlily, water-lily, broad-leaved pondweed

10 Under water sprouts 4. Quillwort family, water lobeliahttps://www-hotel1.it.helsinki.fi/~ekuva/virtuaalikasvio/plant.php?id=4816

11 Free floaters 5. Duckweed, frogbit

12 6. Rigid hornwort, common bladderwort

13 Water mosses 7. Peat moss

14 Aquatic plants in Baltic seaThere is brackish water in Baltic sea -> fresh and salt water plants Plants have to adapt the diversity of the salt gradient Species and the variety of them changes with the salt gradient

15 Right answers 1. Pond water-crowfoot = järvisätkin2. Broad-leaved pondweed = uistinvita 3. Water horsetail = järvikorte 4. Common reed = järviruoko 5. Perfoliate pondweed = ahvenvita 6. Yellow waterlily = ulpukka 7. Water-lily = lumme 8. Duck weed = limaska

16 Thanks