Invertebrate Diversity:
Phylum Porifera
Great video showing active pumping of water through sponges using dyed water:
http://vimeo.com/40240443
Phylum Cnidaria
http://www.youtube.com/watch?v=HG17TsgV_qI
Baker et al. 2004: Interesting (and fairly straight-forward) article about changes in zooxanthellae composition of corals following bleaching events. The exciting part is that there’s a clade that appears more robust and less susceptible to bleaching events (it’s about time for some good news about the future of corals, isn’t it?!).
https://drive.google.com/file/d/0B9Otn2N-sSitMXotdkJlQjYtMFVDWWRBcWl4R3hfVzJLUkxr/edit?usp=sharing
Excerpt from Jackson et al. 2001: see highlighting on p. 634. This is a fabulous (and sad) paper that reviews many cases of fishing-induced ecosystem collapse. One fascinating part of the paper is that it gives you a feeling for the tremendous diversity and abundance of marine organisms that we had around the US, not too long ago (and… the diversity and abundance that could be restored!). I’ve highlighted a really interesting section on oysters. It’s easy to underappreciate oysters and the effects of oyster fishing, but this passage (and citations within) are a great place to draw interesting information from. For example, most students would never guess that oysters reefs in Chesapeake Bay were so vast about 100 yrs ago that they probably filtered the “equivalent of the entire water column every 3 days”!
https://drive.google.com/file/d/0B9Otn2N-sSitWnBUOVZNS0dHSmp3aF9nMmFIVDVTTGtZQjY0/edit?usp=sharing
Phylum Porifera
- No true tissues, and no symmetry
- No body cavity
- There is a central cavity, but not a body cavity
- Every cell "fends for itself"
- No digestive system, no circulatory system
- Each cell in the animal is on it's own - no way to move materials from cell to cell - uses diffusion
- Free swimming larva stage, sessile as adults
Great video showing active pumping of water through sponges using dyed water:
http://vimeo.com/40240443
Phylum Cnidaria
- jellyfish, hydra, coral, sea anemones
- Two germ layers
- radial symmetry
- no cephalization
- Incomplete digestive system - only one opening
- Gastrovascular cavity
- polyp and medusa stages
- tentacles
- nematocysts
http://www.youtube.com/watch?v=HG17TsgV_qI
Baker et al. 2004: Interesting (and fairly straight-forward) article about changes in zooxanthellae composition of corals following bleaching events. The exciting part is that there’s a clade that appears more robust and less susceptible to bleaching events (it’s about time for some good news about the future of corals, isn’t it?!).
https://drive.google.com/file/d/0B9Otn2N-sSitMXotdkJlQjYtMFVDWWRBcWl4R3hfVzJLUkxr/edit?usp=sharing
Excerpt from Jackson et al. 2001: see highlighting on p. 634. This is a fabulous (and sad) paper that reviews many cases of fishing-induced ecosystem collapse. One fascinating part of the paper is that it gives you a feeling for the tremendous diversity and abundance of marine organisms that we had around the US, not too long ago (and… the diversity and abundance that could be restored!). I’ve highlighted a really interesting section on oysters. It’s easy to underappreciate oysters and the effects of oyster fishing, but this passage (and citations within) are a great place to draw interesting information from. For example, most students would never guess that oysters reefs in Chesapeake Bay were so vast about 100 yrs ago that they probably filtered the “equivalent of the entire water column every 3 days”!
https://drive.google.com/file/d/0B9Otn2N-sSitWnBUOVZNS0dHSmp3aF9nMmFIVDVTTGtZQjY0/edit?usp=sharing
Vocabulary
- Larva
- Asymmetry
- Radial Symmetry
- Bilateral symmetry
- Cephalization
- Coelom
- Pseudocoelom
- Monoecious
- Dioecious
- Invertebrate
- Spongocoel
- Osculum
- Spicules
- Choanocyte
- Budding
- Spongin
- Polyp
- Tentacles
- Medusa
- Nematocyst
- Gastrovascular cavity
- Epidermis
- Gastrodermis
- Mesoglea
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