AN ECOLOGICAL STUDY OF A CAMBRIDGESHIRE WOODLAND. 339 
Ax KeonogicAL’ тсру OF A CAMBRIDGESHIRE WoopLANDb. By R. К. 
AbawxsoX, M.A., В.е. Edinb., В.А. Emmanuel College, Cambridge. 
(Communicated by А. G. TaAxstEv, M.A., F.L.N.) 
(PrATES 12-17 and | Text-figure.) 
| Bead. 16th March, 1911.7 
CONTENTS, 
Page 
Introduction оа аана eese 990 
Gamlingay Wood, Situation and Geology ............ ина... 040 
Climate: Rainfall, Temperature, Маа... 341 
Soil... cc RII MED TOPPED 342 
VegetatloD, isse n nn TENER TEE ees 048 
(Ground Flora of the Caleareous Clay... eee 302 
Light, Evaporation, Soil-moisture ... 0.06... е . 952 
Details of the Plant Өосїейев.......................... O98 
Plant Societies of the Caleareous Clay ............ TEE 358 
Aquatic and Subaquatie Vegetation +... еее, ‚.... 869 
Plant Societies of the Loam .......- TEM TEM 
Periodic Changes in the Plant Societies ...................... 213 
General Notes on the Flora of the Wood .................... B75 
Individual Species неее nmn 374 
Comparison with other Cambridgeshire Woods „................ 375 
Effect of Environment........-. essen hm Г 916 
SUMMALY 2.22 en hee eene nen n B77 
Appendix A : Diagram of the Societies of the Caleareous Clay, Кс. 579 
" D: List of Plants found in Gamlingay Wood ........ 380 
List of Literature quoted.......+... ZEN Qa s ..... 988 
Supplement : Soil Analyses... nnn 385 
INTRODUCTION. 
Тик detailed study, both experimental and descriptive, of plant-associations * 
has of recent years received a certain amount of attention from ecologists in 
various parts of the world. Clements f was one of the first to insist upon 
the necessity of experimental work in ecology to make real advances, and 
his book is invaluable for suggestions as to the modes of attacking various 
problems. 
Of work dealing with woodlands in particular, the paper by Hesselman ў 
on the Swedish ^ Lofüngar," or * Wood-meadows," and Woodhead’s $ 
“ Ecology of Woodland Plants in the Neighbourhood of Huddersfield " are 
perhaps the most important. 
In addition to these, numerous American workers have studied the 
conditions in the natural forests on the other side of the Atlantic. 
ж Moss, 19102. + Clements, 1905, р. 161. 
{ Hesselman, 1904. $ Woodhead, 1906, 
