I'm working on a meta-analysis of factors influencing cotton-strip degradation in streams and rivers and thus am collating a large database in collaboration with Dr Scott Tiegs from the USA and Dr Guy Woodward in the UK. I already have a lot of data from various sources, however, the more data I can use the better. Does anyone have any cotton-strip data (i.e., tensile strength loss) and if possible, congruent litter breakdown and physicochemical data that they wouldn't mind sharing for our study? If used, your contribution will be fully cited.
Hi Francis, have you talked to Kathryn L Korbel and Grant Hose at University of Technology Sydney? That's rather subsurface than surface though, i.e. hyporheos and groundwater.
I think that Ralf Schaefer might have that kind of data. http://www.uni-koblenz-landau.de/campus-landau/faculty7/environmental-sciences/landscape-ecology/Staff/ralf-schaefer/ralf-schaefer
Hey Francis! Probably Annika Wangenhoff or someone else from Christoph Matthaei group have some NZ data. (Maybe you have already talked to them). In Spain, I don't know people working with cotton-stips, just leaves or wood sticks. Good luck with your cool study!
For Australian urban stream data, you might contact Sam Imberger or the other coauthors on this paper: doi:10.1111/j.1365-2427.2010.02469.x
Hi Francis. I did some cotton strip work a few years back, comparing 1 regulated and 1 unregulated Tasmanian stream, two sites on each river, and did a visual comparison with benthic leaf decomposition . I'll try to find the data for you, though it was pretty basic stuff.
For Tasmanian work on headwater streams and a long term data set on cotton strips, see Clapcott & Barmuta (2010) http://www.jstor.org/stable/10.1899/09-040.1
and Burrows et al (2014) DOI: 10.1016/j.foreco.2014.04.041
Both were PhD studies and worked on the same set of streams
Hi Francis
I've attached the data file for my cotton strip trial and some documentation. Hope it helps your study. If the attachment doesn't work, you'll have to give me your email address
Thanks Ann, much appreciated and of course your data will be fully cited. You don't happen to have water temperature data for the period that the cotton strips were incubated - also some estimates of dissolved N and P?
Anne, sorry, hopefully my last request - do you also have the tensile strength data for the control strips? I would like to express your data as % tensile strength loss. Thanks, Frank.
Hi Frank
This is testing my memory and dodgy filing system. Attached file has raw tensile strength data, in Kg. The previous file I sent you was the R conversion against the controls. I used separate controls for fine and coarse bags. Separate worksheets in file for water temperature and nutrients close to study date, but not done specifically for this trial
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