DESCRIBE SEAWEED How does seaweed benefit life in the ocean? Humans? READ ARTICLE

SEAWEED CHARACTERISTICS Multicellular algae/ macroscopic algae Photosynthetic Producer Autotrophic SEAWEEDS are CLASSIFIED by color Red green brown

INSTRUCTIONAL OBJECTIVES SEAWEEDS 1. Classify the main kinds of multicellular algae(seaweeds) 2. Distinguish between the different types of multicellular algae. 3. Describe characteristics and habitats of the multicellular algae.

SEAWEED BENEFITS TO HUMANS Food source Oxygen Habitat and nutrient source for ocean life Toothpaste Photography film Skin care vitamins

SEAWEED BENEFITS

SEAWEED Seaweeds are a type of MULTICELLULAR ALGAE that are photosynthetic, multicellular and have sexual and asexual reproduction. Their reproduction stage has two parts the gametophyte stage is sexual and the sporophyte stage is asexual. They are classified in kingdom Protista. They are CLASSIFIED according to their color red, green or brown. Guess the AIM???

AIM: How can we classify multicellular algae(seaweeds)? Label Diagram http://t3.gstatic.com/images?q=tbn:ANd9GcQgo4NxD5tj6WoYaIkSLtHmUyyWJQEEA7N_KWZEulI_ci48Q7q0tg:www.mbgnet.net/salt/oceans/pict/kelp.jpg

SEAWEED STRUCTURE AND FUNCTION SEAWEED FUNCTION BLADE STIPE AIR BLADDER THALLUS/FROND HOLDFAST

SEAWEED STRUCTURE and FUNCTION 1. blade-leaf 2. stipe-stem 3. air bladder 4. holdfast-roots 5. thallus-leafy part of plant 1. Photosynthesis 2. Transport of nutrients/flexibility 3. Buoyancy 4. attach to substrate(rocks) 5. leafy part of seaweed SEAWEED STRUCTURE and FUNCTION

SEAWEED FUNCTION Photosynthesis Flexibility: supports structure and transports nutrients Buoyancy Hold to substrate so it is not washed away Leafy part of structure

How does seaweed get nutrition?

SEAWEED NUTRITION Seaweed gets energy from photosynthesis and gets other nutrients and minerals from absorbing them from the ocean Carbon dioxide + Light + water  oxygen + glucose

SEAWEED REPRODUCTION alternation of generations

Ulva Alternation of Generations

SEAWEED ACTIVITY Research seaweed types using references Look up the type of algae(red, green or brown) Look up phylum using classification tree Look up common name if there is one List unique characteristics list habitat/zone

Genus/common name Kingdom/phylum Type or color characteristics habitat Ulva/sea lettuce Acetabularia Codium Enteromorpha Fucus/rockweed Laminaria/kelp Sargassum Corallina Chondrus crispus/irish moss Porphyra

SEAWEED SUMMARY The multicellular algae/seaweed are classified in three different phyla based on the color of their pigments. Seaweeds are adapted to live in a variety of marine habitats, from the intertidal and subtidal zones to the open ocean. They are photosynthetic organisms and provide, oxygen, a food source and habitat for other ocean organisms.

SEAWEED or MULTICELLULAR ALGAE EXIT QUIZ 1. True or False. Correct for full credit. Ulva or sea lettuce is classified in phylum Rhodophyta. 2. Which seaweed is not green algae? A. Chondrus crispus B. Acetabularia C. Ulva D. Codium 3. I am a brown, multicellular algae. I live in the intertidal zone and my common name is Rockweed. Who am I? A. Irish moss B. Sea lettuce C. Enteromorpha D. Fucus 4. Describe 2 differences between Acetabularia and Corallina in a Ven diagram or double tt chart.