Geology 230

Groundwater/ Surface Water Interaction

California State University, Sacramento

Week 7:

Carbon in stream environments



Upon completion of this unit students should be able to:

  • Discuss the components of the carbon cycle.

  • Identify sources and sinks of carbon in natural systems.

  • Distinguish between different types of carbon.

  • Trace the effects of upwelling and downwelling on carbon mobility and exchange.


Reading Assignments:

1) Jones and Mulholland:  pp. 237-253.


2) Bisson, P.A., and Bilby, R. E., Organic matter and trophic dynamics (ch. 15), in, River Ecology and Management, Lessons from the Pacific Coastal Region, Springer, ed. by Naiman and Bilby, pp. 373-398.


Bisson and Bilby


3) Wetzel, R. G., 2001, Allochthonous carbon (chaper 23), in, Limnology Lake and River Ecosystems, Academic Press, San Francisco, pp. 739-766.








Tim's summary of Jones and Mulholland, pp. 237-253:


Carbon in streams


Juliette: Bisson and Bilby carbon chapter question:


This paper focuses on food as a limiting factor for stream production. It mentions that nutrient enrichment may enhance trophic processes that support the production of undesirable organisms. What else might anthropogenic nutrient enrichment cause?


Summary of Bisson and Bilby chapter


Katy: Wetzel Carbon Chapter question:


Table 23-4 shows annual riverine DOC flux from different solids and vegetation habitat. Based on the reading, summarize what factors you think account for the differences in DOC flux between the different biomes and briefly theorize why.



Summary of Wetzel article