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The vegetation databank established by our working group covers the classes Festuco-Brometea, Koelerio-Corynephoretea, and Trifolio-Geranietea sanguinei in the Nordic and Baltic region. i.e. NE Germany, Denmark, Norway, Sweden, Finland, N Poland, Lithuania, Latvia, Estonia, and NW Russia. We aim to use these data to develop a consistent supra-national phytosociological classification of these xerothermic vegetation types in the study area and to analyse their biodiversity patterns. Up to now, we located some 12,500 relevés meeting our criteria, and more than 3,500 of them have already been included in the databank. We give an overview of the properties of these relevés as regards coverage of syntaxa and countries, source types, plot sizes, and cryptogam treatment. We also present first analyses for the basiphilous semi-dry grasslands (Brachypodietalia pinnati) within the Festuco-Brometea. For this group of communities, many different and incompatible classification schemes have been proposed. We give an overview of the alliance and association names that have been in use for them in the study area, accompanied by a nomenclatural assessment. The relevés presently included in the databank have been tentatively assigned to those vegetation classes whose diagnostic taxa were prevailing. Accordingly, more than 2,000 relevés have been placed in the Festuco-Brometea. These show considerable floristic differenccs compared to stands of the southern temperate Brachypodietalia pinnati alliances Bromion erecti, Cirsio-Brachypodion pinnati, and Agrostion vinealis. The presence degrees of Avenula pratensis and Homalothecium lutescens, for instance, are significantly increased in the study area, and those of Festuca rupicola and Euphorbia cyparissias decreased. An analysis of the species-area relationship yielded a power function with z = 0.09 which is considerably lower than increments determined by nested-plot analyses of this community type, indicating the probable incompleteness of the species lists for many of the larger plots. Finally, we give an outlook on the future objectives of the working group. © 2006, Universita degli Studi di Roma 'La Sapienza'. All rights reserved.
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
 nuova serie

WORKING GROUP ON DRY GRASSLANDS IN THE NORDIC AND
BALTIC REGION - OUTLINE OF THE PROJECT AND FIRST RESULTS
FOR THE CLASS FESTUCO-BROMETEA

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
 7' 

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
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
  

 

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
  
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  JO,


 
  




  
-        



          
     

  




   
    
    
       
2
          


        
         
  2,000         
          
         
          
     
z = 0.09 

            
    
KEY      


 
 
  
        












          
             
 
          

          

 

          
  

        

         
   
3
    
 




        


           
         

      
   
        
      
 


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          
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          
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4
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
  
       

  
            


   
        
           



5
Criteria for the inclusion of data

  

        


   
  
          


 

 

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



   


 
         
           

    
 
   
 
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
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 
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
   




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

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
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
         
 
             


 
Standardisation within the databank





6
  

 


 


   

 

+, 






 

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  
 



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






   

           
 and 
the  






      

 




          



   


        

 

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 
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8
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(a priori 
Data in the databank
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


  
         






           



         
 


 
          
          

 
  



10
 
        
          
          
     

       



            

          
 


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
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



           

         




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  

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           


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

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
 

 (=      

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  
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     
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

        

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    
         



  



 
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
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

     
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 
         
          
           
  

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 
   
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          
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






 
          

            
 
    
     
   
 
        
           

         
12
 
         


     
    
   
       
      

 
      
          

 
           
    
 
   
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     
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
 
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
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
 

       


 
 

           
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  
         


 
 
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 
      
            
    

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



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           


 





       

     
       
  
          
        

     



  

        
            
     
            










l 


          
= 
14

 









          




  
   
           

        

         

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7 -  Festuco-Brometea  
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