Basics of Marine Life Ms Reinhard Marine Science
Basics of Marine Life Ms. Reinhard Marine Science
What does it mean to be living? Nutrition Synthesis Transport Regulation Respiration Excretion Reproduction
Types of Cells Prokaryotic: No nucleus Usually bacteria Smaller cells Examples: Thiomargarita namibiensis Cyanobacteria Eukaryotic: Nucleus Protists, fungi, plants, animals Larger cells Examples: Diatoms, dinoflagellates Sponges, Algae, Mollusks, Crustaceans, Fish
How do we classify organisms? 91% of ocean species have yet to be classified So how do we classify new organisms we discover? Berardius minimus (beaked whale) Phylogeny: evolutionary relationships Some organisms look like others but are not actually related. This is called convergent evolution: environment acts on distantly related populations (sharks and bony fishes). https: //www. youtube. com/watch? v=MMwpk. O 9 h. Pb. Q
Cladograms Show phylogenetic relationships between organisms. Derived characteristics: shared trait amongst organisms before a new branching point.
Taxonomy Binomial nomenclature: 2 name system. Based on latin. Why can’t we use the common name? Least inclusive Spisula solidissima Genus Species Most inclusive
Six Kingdoms Archaea: extremophiles. Bacteria at hydrothermal vents. Eubacteria: more than a billion microorganisms live in each litre of seawater. Protista: uni/multicellular. Algae, diatoms, foraminifera, and diatoms. Fungi: not really prevalent in marine ecosystems. . . Plantae: seagrasses Animalia: from sponges to whales and everything in between.
- Slides: 8