O spartina grasses filter 34 o plankton which is

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o Spartina grasses filter 34. o Plankton which is third group of bars prefers sulfur 34 more than any other groups. 3 groups of plants. Upland C3 is above ground in upland areas- their leaves may be transported back and forth by ocean. As shredders break them apart, the organists that each those plants can pick up material as well as mussels! Second is popular in wetland- can be picked up by mussels and animals that eat them into their muscle get. Having different combinations is different signatures. It’s like a barcode. You can go to mussels and see what they got in their body- tells you what they prefer to eat. ° ° On a gradient that describes distance away from the ocean- the right side is furthest away from the ocean- 9 is the closest. Wherever you have those sites, there are smaller channels where the clams live. Number one is furthest. We have a gradient from furthest to closest- you can plot this composition because it’s a three way composition- you need at least two axis on left( depleted c13 and depleted s34) vs. enriched.
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Forms a gradient that indicates sites that progressively have more and more phytoplankton signature- corresponds to picture on left- site 9 eats marine stuff. Site 1 is dominated by terrestrial depending on where they sit, they eat different things! ° ° Summary Terrestrial PP is limited by temperature and moisture biomes are an expression of this (living activity and constrains on living activity) Aquatic is not limited by moisture, but by nutrients different by freshwaters (limited by P). o Ocean is not limited by P, but more by N. o It’s also limited by Iron- micronutrient- less available in ocean than in soils. o In Indian ocean iron precipitates because it’s not very soluble. o You can fertilize an ocean by spreading iron dust P immediately goes up. Consumer activity can change P- especially if consumption is at intermediate levels; boosts productivity. There’s this regular physically defined pattern of energy availability decline from one trophic level to another- plants, herbivores, predators, etc. Each suite of organists assigned to a level metabolize (use energy for that dissipated as heat!). Why are most fish cold blooded? o They probably could be warmer, but losses of energy would be greater than on land- fish gave up on the solution- only one found a solution (a few) managed to retain energy: tuna (higher body temperature than environment), big sharks… best heated shark is salmon shark- heats in northern waters in pacific- these sharks are capable of maintaining temperature of 20 degrees over ambient- if water is 7, body is 27 degrees result is that they can be so fast and that helps them to be salmon sharks because hey outswim salmon. One of the many methods you can use to track energy is using stable isotopes- good because they are already in environment so we just need to measure them and draw some inferences.
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  • Spring '11
  • Cartwright
  • Ecology

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