Deep Vents. LP 10 AdVENTurous Findings on the Deep Sea Floor Mystery of the Megaplume from Submarine Ring of Fire LP 22 Who Promised You a Rose Garden LP 18 Let’s Make a Tubeworm!. Packet Hydrothermal Vent Challenge The Volcano Factory – both from the 2004 Submarine Ring of Fire.
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Compare your work with these data.
Deep vent systems are extremely geologically active, dynamic systems
What changes are observed over time? In 1979 the Rose Garden had extensive fields of the tubeworm Riftia, mussels were abundant and clams were absent.
Compare the 1985 map of the Rose Garden with the 1979 observations.
Some organisms use methane as an energy and carbon source and some use hydrogen sulfide as an energy source with carbon dioxide as a carbon source.
Methane hydrate is a clathrate – a lattice of one compound (water) inside which a second compound (methane) is contained. There are no covalent bonds. Stable due to pressure and temperature. Methane may be released rapidly when conditions change.
Bivalves – mussels and clams tested for 13C – a stable isotope of carbon
Carbon from sea water is 0 o/oo
Carbon from photosynthetically dervied material is 18-20 o/oo
Carbon from methane is 40 o/oo or higher
Carbon from sulfide metabolism is 30-40 o/oo
Note error on page 130 higher not lower
1. Count the number of species for site A and B, seep and non-seep areas and record your findings.
2. Use the form provided to make a bar graph, comparing seep and non-seep numbers of individuals in each species. Use two colors on one graph as lines side by side. Do site A.