October 11, 2011
Cool Things - Part I
Application of profiling buoys to determine whole lake metabolism in stratified lakes - P. Staehr
- Accounting for physical changes between depths
- Respiration and NPP higher in metalimnion
- High variability of biological processes driven mix layer depth, light attenuation
Deep chlorophyll maxima - Kevin Rose
- Implicatinos for ecosystem structure and metabolism estimates
- UV and PAR with manual profiler
- Chlorophyll peaks line up with 1.7% PAR and forms a 1:1 linear relationship (R^2 = 0.98)
Would help to know what deep chlorophyll maxima are
- Looking for PAR and UV profile data
Unnamed presentation shall remain unnamed
- I'm going to skip this one but will bet $5 that the speaker goes way over the time limit. Any takers?
- Rainfall increase increases UV absorbance due to accompanying increase in fresh DOC.
- Moderator is standing and the speaker is going strong. Double or nothing?!?!?
- No time for questions, I win the day.
Earth Microbiome Project - Ashley Shade
- Interesting side note: Ashley made the shortlist for an EEB faculty position a few years ago. She's now post-docing at Yale University.
- EMP Goal: characterizing microbial life on earth
- Four products - Gene Atlas, Assembled Genomes, Metabolic Reconstruction, Visualization Portal
- Opportunity to get microbes at UMBS sequenced
Novel approaches for assessing ecosystem metabolism and greenhouse gas fluxes at the Experimental Lakes Area - Scott Higgins
- Plug for Experimental Lakes Area
- NW Ontario research area with ~40 years of data
- Have sediment flux chambers deployed
- Supped up garden hose rack hooked to a data logger which controls raising and lowering of sensor package
Analysis of future scenarios of simulated water temperature data using lake analyzer - Nihar Samal
- Use climate model predictions to guestimate future water temps and feed into Lake Analyzer to model physical structure of the lake
- Interesting combination of climate change models and limnological models. However, models derived from models of models yields skepticism - error propagation, anyone?
- Schmidt Stability increases 15-20%
CALON project: Circumarctic Lakes Observation Network - John Lenters
- Note: Lenters also has projects on Lake Superior with collaborators from N. Michigan University
- This is a new site report, next GLEON should have data
- Arctic Observing Network - NSF/NOAA initiative, funding CALON
- One site in Barrow, Emaiksoun Lake and one other
Meta: We've two talks left and it is now lunchtime :|
I pledge to keep my talk very short - which probably won't matter because I am slated to go last tomorrow and we'll almost surely be 20 minutes behind by then.
Meta II: Nevermind, they're cancelling talks to get us to lunch.
Renconciling differences in the temperature-dependence of ecosystem respiration across time scales and ecosystem types
Complete aside: internet speed appears to decrease when boring talks are given - Gabriel Yvon-Durocher
- take home: this person is doing a nice job of linking terrestrial carbon to aquatic ecoystems
Working Group Reports
It's a live-blog people. Buckle up!
Lake Metabolism Working Group
- Comparing GPP, R and NEP among 25 lakes
- Mendota - night time metabolism
- Linking chlorophyll and metabolism
- Diel patterns in respiration (identifying different drivers)
- Physical affects on lake metabolism (Rose et al)
- Newest = high-frequency DO with Chl fluorescence data
- No UMBS data
Signal Processing Working Group
- Scales of variability in chl fluorescence
- inter-lake variability
- linking with biological variables
- Established QA/QC methods
- Day/night flourescence relationships
- Chl A variance at monthly/daily scales (Jim Rusak)
- Disturbance impacts on Chl A
- No UMBS data
Climate and Lake Physics Working Group
- Lake Analyzer consumes temp profiles, met variables and yields thermocline depth, smith stability, water density and other variables
- expansion planned: QA/QC
- Physical variability of lakes (K. Rose)
- Convective/wind mixing - causes of turbulence (J. Read)
- Extreme events synthesis
- Yes UMBS data
Lake Ecosystem Modelling Working Group
- Multi-model comparisons
what kind of model?
I don't know
- Other stuff goes here.
- PhD student opportunity in Denmark, contact Dennis
The Theory Group Working Group
- Award for non-name name
- Phytoplankton dynamics across different types of lakes
- Use lake physical parameters and link to phytoplankton assemblage dynamics
- Use low-res manual sampling as well
Sounds like community ecology, no?
- Seems course/REU data from UMBS could fit into this working group
- Need phytoplankton assemblage on monthly scale, currently with 3 lakes and not ready to add more :|
- Will be assessing data strengths
IT Working Group
- received supplemental funds to improve information management practices
- Looking to form task force to prioritize resource allocation (not much else here, more tomorrow?)
- Existing infrastructure:
- Data from 44 sites (Douglas Lake included) -> Plotting tools via Vega Database
- LakeBase (note to self: get DL metadata into this) - basic descriptors
- People Database - GLEON membership info
Unnamed Working Group Shall Remain Unnamed Working Group
- Microbial Working Group
- Microbes under ice!
- Autonomous detection/sampling devices
- Need DNA samples from Lakes (they will analyze for you)
- Currently done at high altitude, western lakes (K. Rose)
- Will be developing sampling protocols/policies
- First samples in 2012
- Earth Microbiome Project (Ashley)
Episodic Events Virtual Group Working Group
- Manuscript in press: Impacts of weather related episodic events in lakes: an analysis based on high frequency data