Page 228 - Introduction to Paleobiology and The Fossil Record

PROTISTS 215

100 m planktonic foraminifera 3000 m

20 10 100% relative abundance of
30 Textulariina
40 90
50
60 80
70
80 90 70
Miliolina 100% 60 50
10
20 40 Globigerinoides Globorotalia
30
40 50 30
60 20 Rotaliina
70
80
90 10 abyssal
T 100% spinose planktonics keeled planktonics
M hypersaline lagoons % agglutinated forms
Triloculina Discoris 3000 m

T R

M normal marine lagoons and carbonate platforms bathyal % planktonics (Globigerinacea) Foram test and environments: distribution of test types and genera of Foraminifera against environmental gradients.
Quinqueloculina Cibicides T R Reophax

Ammonia brackish lagoons and estuaries
M 200 m

T relative abundance of benthic Foraminifera on the sea floor maximum diversity of agglutinated forms
R
most shelf seas
M shelf (neritic)

T 100 m
R maximum diversity of calcareous benthic forms
M
freshwater % calcareous benthic forms 50 m (From Armstrong & Brasier 2005.)

Allogromia R

0 m Figure 9.7