 
	
							
	
							
								
							Above – A composite early warning index comprising all four indicators is highly sensitive to the onset of critical slowing down. a, Time-specific calculations of…
 
	
							
	
							
								
							Background A partial differential equation model of population growth and dispersal developed by Lewis and Karieva (1993) predicts that invading populations subject to an Allee…

 
   
   
   
    
   
   
   
  