which is more vulnerable to disturbances, a simple food web with only a few species or a more complex one

few species

Explanation:

in a complex one im not sure as to how the question measures complexity but a complex one may have more options and more things to adapt to

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.