BIO 514 San Diego State

Division Cyanophyta Diagnostic Cyanobacteria (blue green algae) were the first living algae (3.5 billion ya) (slide 1-2) More closely related to Prokaryotic bacteria than Eukaryotic algae (Slide 3-4) Pigments = chl a, biliproteins, carotenoids.ALL

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Community ecology of marine algae Carnivores Herbivores Plants Bottom-up Top-down Hairston et al. 1960 Am. Nat.; Fretwell 1987 Oikos Tertiary Carnivores Strength of arrows Secondary Carnivores Carnivores Herbivores Autotrophs Increasing Chai

Cyanobacteria THE FIRST ALGAE! Evolution Old 3.5 billion years Dominated as biogenic reefs During Proterozoic Age of Bacteria (2.5 bya 750 mya) they were wide spread Then multicellularity took over Cyanobacteria were first algae! Cyanobacte

Marsh and Dune Plants Mostly vascular plants Probably reinvaded marsh and wetlands Kingdon Plantae 2 divisions (Trachaeophyta and Anthophyta) Dune Plants/environment These are \"halophytic\" (adapted to living in salt or salt spray environment) Adap

Sea grasses and mangroves Mangroves Occur in protected water on tropical to subtropical coasts Diverse group of trees and shrubs Grow to 30 m Can be FW or SW (tallest ones are FW) Roots are specialized o Horizontal cable roots are just below sur

Community ecology of marine algae Carnivores Herbivores Plants Bottom-up Top-down Hairston et al. 1960 Am. Nat.; Fretwell 1987 Oikos Tertiary Carnivores Strength of arrows Secondary Carnivores Carnivores Herbivores Autotrophs Increasing Chai

Marsh and Dune Plants Mostly vascular plants Probably reinvaded marsh and wetlands Kingdon Plantae 2 divisions (Trachaeophyta and Anthophyta) Dune Plants/environment These are \"halophytic\" (adapted to living in salt or salt spray environment) Adap