Key points are not available for this paper at this time.
T. H. Sparks, P. D. Carey, The Responses of Species to Climate Over Two Centuries: An Analysis of the Marsham Phenological Record, 1736-1947, Journal of Ecology, Vol. 83, No. 2 (Apr., 1995), pp. 321-329
Sparks et al. (Sat,) studied this question.