In the following folder you will find ascii files of selected MSFD descriptors/criteria, outputs of the Mediterranean HTL ecosystem model, used in the context of Blue2/MEME scenarios on nutrient reduction.
The two scenarios include, for the 2005-2012 period: 1) actual nutrient loads from river discharge (reference scenario, REF), and 2) maximum technically feasible reduction (MTFR scenario) of nutrient input to surface water.

The list, definition of the selected descriptors/criteria is described below:      

D3 Commercially-exploited fish and shellfish	
   C2: The Spawning Stock Biomass of populations of commercially-exploited species: for the exercise we selected Sardina pilchardus (European sardine)
D4 Food webs	
   C1: The diversity (species composition and their relative abundance): here we selected species diversity index, calculated as follow (Ainsworth and Pitcher, 2006): 
   Q_i=  0.8Fg/(log?(R_2/R_1 ))
   where Fg is the total number of functional groups in the model, R1 and R2 are the representative biomass values of the 10th and 90th percentiles in the cumulative abundance distribution.
   C2: The balance of total abundance (number of individuals or biomass in tonnes) between the trophic guilds: here we selected Small pelagic fish biomass, in particular commercial and non- commercial small (below <30cm) pelagic planktivorous fishes (classification extracted from Fishbase; www.fishbase.org). 

In addition to the MSFD criteria, other indicators were assessed to test if nutrient scenarios would have an impact on the trophic structure of the ecosystems. 
These include the trophic level of the community, excluding TL<2 (mTLco) (Shannon et al., 2014), calculated as:
mTLco_co=?_(i=1)^n (B_i·TL_i)/TB
where TB is total biomass, Bi is the biomass of species i and TLi is the trophic level of species i (note: TB, Bi and TLi vary in time); and the TL of the landed catches (TLc) (Christensen, 1996; Pauly et al., 1998), calculated as:
TL_c=?_(i=1)^n (Y_i·TL_i)/Y_L 
where YL is total landings, Yi is the landing of species i and TLi is the trophic level of species i (note: YL, Yi and TLi vary in time).