Information associated with the population dynamics of organisms
Melampus bidentatus (coffee bean snail) length and biomass measurements for Rowley River tidal creeks associated with long term fertilization experiments, Rowley and Ipswich, MA. The TIDE project aims to simulate eutrophication on a large scale by the addition of NO3- aiming to reach 70μM concentrations from May to September every year during the growing season. This fertilization of the marsh has been going on at Sweeney Creek since the 2004 growing season through 2011 and at Clubhead Creek in 2005 and from 2009 till 2011.
All samples taken in late August(2009) and early September(2010). 10 snails were randomly selected from field-collected snails and measured for shell height (from the spire to the tip of operculum). In the field, 10 quadrats were haphazardly tossed in the high marsh (dominated by Spartina patens) of each creek branch. Data can be paired with high-marsh invertebrate density file.
Reference creeks are West and Nelson
Nutrient Enriched creeks are Sweeney and Clubhead. Sweeney has been fertilized every summer from 2004-2011. Clubhead had been fertilized in 2005 and then from 2009-2011.
All creeks have two branches determined by direction at confluence while facing upstream (Left or Right).
Version 01: January 27, 2012, updated data and metadata. Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 1/18/12 4:51 PM for QA/QC to EML 2.1.0
Version 02: June 20, 2013 data and metadata updated to comply with importation to Drupal and LTER PASTA. Research location name and description updated.Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 3/14/13 12:02 PM for QA/QC to EML 2.1.0