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MARINE BOTANY. FALL 2009 BIOL 202-MARINE BOTANY COURSE INSTRUCTOR: Dr. Mitra. WHAT IS MARINE BOTANY?. Study of marine plants in their natural habitats. Floras---Algae and Angiosperms. Seagrasses, Mangroves Marsh plants. Macroalgae/seaweeds. microalgae. Green, Red, and Brown.

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marine botany

MARINE BOTANY

FALL 2009

BIOL 202-MARINE BOTANY

COURSE INSTRUCTOR: Dr. Mitra

what is marine botany
WHAT IS MARINE BOTANY?
  • Study of marine plants in their natural habitats.
  • Floras---Algae and Angiosperms

Seagrasses,

Mangroves

Marsh plants

Macroalgae/seaweeds

microalgae

Green, Red, and Brown

green, blue-green, diatoms,

dinoflagellates

classification of marine plants
CLASSIFICATION OF MARINE PLANTS
  • MONERA

prokaryotes, absence of membrane-bound organelles, DNA is not organized into chromosomes.

  • PROTISTA

photosynthetic, presence of many pigments besides chlorophyll a, no protective tissue around gametic cells, variations in life cycles.

  • PLANTAE

photosynthetic, vascular tissues present, chlorophylls are dominant. Marine group has mostly angiosperms. Gymnosperms are non-marine, and very few species of mosses and ferns are marine.

  • FUNGI
  • ANIMALIA
botanical nomenclature
BOTANICAL NOMENCLATURE
  • Taxonomic Unit Ending of Unit

Division --phyta

Class --phyceae

Subclass --oideae

Order --ales

Family --aceae

Name (Genus and species)

botanical nomenclature5
BOTANICAL NOMENCLATURE
  • Binomial nomenclature—Ulvalactuca
  • Binomial Nomenclature was proposed by Linnaeus in 1753. Cited in Species Plantarum.
  • Type Specimen—The specimen from where the description is made. Collected and placed in a herbarium. Herbarium label—species name, location, date of collection, habitat, name of collector and identifier)
course organization marine botany
COURSE ORGANIZATION—MARINE BOTANY
  • MARINE PLANTS---MICROALGAE (PHYTOPLANKTON)
  • MARINE PLANTS---MACROALGAE (BENTHIC)
  • MARINE PLANTS AND ECOSYSTEMS—SAV, MANGROVES, SALT MARSH, CORAL REEFS
  • IMPACTS ON THE ECOSYSTEMS—NATURAL AND ANTHROPOGENIC
why are marine plants important
Why are marine plants important?
  • Primary producers---important component in the food chain; utilizing carbon-dioxide for photosynthesis; oxygen is produced as a result of photosynthesis;
  • Habitats for other plants and animals;
  • Filter pollutants from water—improve water clarity;
  • Stabilize the sediments (mostly marine angiosperms);
  • Bioabsorption and Bioremediation;
  • Algae as superfood---health benefits (antioxidants, brain-boosting nutrients (ex: Phosphatidylserine), treatment of skin infections, antimicrobial, prevention of allergies, lower cholesterol levels, combat diabetes and other chronic diseases).
examples of algae with health benefits
EXAMPLES OF ALGAE WITHHEALTH BENEFITS
  • Chlorella (Green Alga—Chlorophyta)
  • Spirulina (Blue-Green Alga—Cyanophyta)
  • Seaweeds---Fucus vesiculosus (Phaeophyceae), Ulva lactuca (Chlorophyta), and Gracilaria tikvahiae (Rhodophyta)
chlorella
Chlorella

Source: http://www.rbgsyd.nsw.gov.au/__data/assets/image/47350/chlorella2.gif

spirulina
Spirulina

Source: botit.botany.wisc.edu

seaweeds
Seaweeds

Photos are by Dr. Mitra’s Research Group.These pictures are not to be

used for any purpose without Dr. Mitra’s approval.

ecosystem approach
ECOSYSTEM APPROACH

Eelgrass with the macroalga Gracilaria tikvahiae

Photo by Dr. Mitra