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Microzooplankton grazing dynamics: parameterizing grazing models with dilution experiment data from the California Current Ecosystem
| Content Provider | Semantic Scholar |
|---|---|
| Author | Li, Qian P. Franks, Peter J. S. Landry, Michael R. |
| Copyright Year | 2011 |
| Abstract | Coupled physical-biological models are essential tools for enhancing our under- standing of the potential effects of long-term climate change on planktonic ecosystems in the world's ocean. A major impediment to utilizing such models is obtaining accurate parameteriza- tions of the modeled rate processes, such as growth and grazing. The California Current Ecosys- tem Long-Term Ecological Research (CCE-LTER) program has generated detailed data of phyto- plankton growth and zooplankton grazing rates obtained in the field by the dilution technique. Here, we examine how data from dilution experiments can be used with nonlinear grazing models to study the dynamics of microzooplankton grazing. We use data from experiments conducted in 2007 to parameterize 3 different grazing functions and then test them against a more extensive data set from a CCE-LTER process cruise in 2006. We found that system-level parameterizations of the functional response relationships, representing the aggregate behaviors of predators and prey adapted to different environmental conditions, reasonably predict the shapes and magni- tudes of vertical profiles of microzooplankton grazing in both coastal and open-ocean environ- ments in the CCE. Predicting the magnitude of grazing rates — as opposed to just the concentra- tions of grazers — presents a much greater challenge for models in previous studies. Model-data comparisons are often difficult due to the lack of extensive data from different environments. Our study is a significant advance in the parameterization of zooplankton grazing models in the field and will serve as a solid base on which to pursue further studies of the planktonic ecosystems of the northeastern Pacific. |
| Starting Page | 59 |
| Ending Page | 69 |
| Page Count | 11 |
| File Format | PDF HTM / HTML |
| DOI | 10.3354/meps09320 |
| Volume Number | 438 |
| Alternate Webpage(s) | https://www.int-res.com/articles/meps2011/438/m438p059.pdf |
| Alternate Webpage(s) | http://cce.lternet.edu/docs/bibliography/Public/171ccelter.pdf |
| Alternate Webpage(s) | https://doi.org/10.3354/meps09320 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
