COWTENTS 



Pduat 



ImibFodhnidtJisii^ ...... ......... . ... ......... . — .... 33 



GeneiraJL taeriptitu ef 1Ae i^um amd Uneatiam «tf the eeolagiieal statuna 3S 



L, Oeiienl deaoriqpltiioii of 1tlie iF^jum 35 



n. The eeologieal istatums 3S 



Desenpilioii of Umb paixm haMtalts and animals .. 40-56 



I. Piniiie area morfh of diailesltoii, Station 1 40 



1. doloi^ of mmmp glares (Sj^eatiam and Ettfmmt}, citatum !,«. . 41 



2. Clolony of villd i^e, MlsftKiis im-§imam saibi^E&m, Station ^ e. . 43 



3. Weft axea of snmmap milkneed (Atd^pms imeesrmestajg Station !,<! 44 



4. Cone-flower and la^in-TCeed eoionj. Station I,e 4S 



5. Colony of Mme stem (Aiiidimjposiim} and drop-eeed (SpmmtmSies}, 



boi^leied 1^ siimmp niJQIkneed, Station 1, 9 49 



6. Snpplementaiy eoDeetions firorn Station I S2 



H. Piairie aiea near laosa, lUinaia, Station H 52 



m. Piairie area east of Charleston, Station HI S5 



Beseription of the finest haJbitata and amimabi 56-S6 



1. The Bates woods. Station I¥ 36 



2. The MpDand oak-ldebny finest. Station IV, a Sf 



3. Emtorrasi Tale^ and laTine aHopes, £arested by the oak-hiehoiy 



a^oeiatian, Station IV, 6 59 



4^ Lowland or "seeond Isottom," led oak-dm-sngai' nuaqple wood- 

 land a^oeiation. Station IV, e 62 



5. Snrppleniientarj eoDeetions from the Bates woods. Station IV 65 



6u Skiull tempoiaiy streani in the sonth ravine, Stadtum IV, «t 65 



Qenenil ehaiaeteristies of tte gross environment 66-lti@ 



1. Topography and swls of the ^tate 66 



2. Oiniatie eonditions 67 



3. Oimatie eenteis of inflmienee 69 



4. BelafiTe himidity and evaporating power of the air 71 



5. TVmperatnre relations in iflie open and in forests S3 



6. Soil moistnre and its relation to vegclation S6 



7. Ventilation of land haMtats SS 



8. The tree trunk as a habitat 91 



9. Prairie and forest v^etation and animal life 91 



10. Somrees and i61e of water nsed bj piairie and forest animals 98 



Aiiiim»l associations of the piairie and the finest 102-158 



I. Introdnetion 



IL The piairie assoeintion 



1. Swamp prairie a^oeiation 



2. The eottonwood eomnnmil^ ' 



3. Swamp-gia^ a^oeiatifm 



4^ Low prairie a^oriation 



5. Upland piairie assoaation 



6. The SoUdago eommmiil^ 



7. Drf piairie grass ai^ociation m 



8. A milkweed eommimity 113 



XUL Belation of prairie animals to their environment 113 



1. The bfaiA soQ piairie eommnnil^ 114 



2. The piairie v^etation eonmnmity 117 



4. Interrelations within the piairie a^oeixtion US 



.03 



.05 



[09 

 09 



