Parameter
Proxy
Basic assumption(s/ Empirical relationship
biological
37a transfer function
I ) the deep·sea
local correlations
production 4
:
benthic community
between faunal
organic
depends on organic
assemblage composition
matter input from
changes and food supply
surface (except
(see
1)
hydrothermal vent
systems)
2) the impact of food
supply dominates
small physicochemical
changes
37b accumulation rate accumulation rate
of
the number of infaunal
of infaunal
infaunal benthic
benthic forams will
benthic foramiforaminifera is
increase as more food
nifera (indicator
indicator
of high
becomes available
species)
productivity
38. L'.OI3C(b-p)
"biological pump":
AOl3
C (difference
1)
Corg is enriched in
between benthic and
l2C.
planktic foraminifers) is
2) decomposition of
a measure for the AOIJC
Corg at seafloor
gradient with depth
simultaneously
increases
l:C02 and
nutrients
38b
Ao 13
C,.p
different species
Ao 13
C (difference
occupy different depth
between two planktic
habitats
foraminifers) is a
measure for the
~013C
gradient with depth or
growth season
38c
~OIJCcpi-endo
1) endofaunal species intensity
of oxydation as
record pore water
expressed by the O 13
C
2) epifaunal species
difference between epirecord sediment/water
and enda-faunal benthics
interface
is a function of organic
matter supply (flux)
-
-
Selected rejerence(s!'
Precision (lab.
revroducib.)
Vincent and Berger
see
1
(1981); Miller and
Lohmann (1982);
Corliss (1985);Mix
(1989); Loubere (1994);
Schmiedl et al. (1997)
Corliss and Chen
see 1
(1988);
Loubere (1991);
Gooday (1993);
Kit.zato (1994);
Loubere (1994);
Thomas et al. (1995);
Mackensen (1997)
Broecker and Peng
see
30
(1982);
Shackleton et al. (1983)
Kroon and Ganssen
see
41
(1989);
Schneider et
a1. (1994)
Zahn et al. (1986);
see 30
McCorkle et al. (1990)
Accurac/
see 1
qualitative
?
?
?
Pitfalls
sec
1
I) see
1
2) events rather than average
production (seasonality). e.g.
E.
exigua is indicator for periodic Cflux (Turley et al. 1993)
3)
taxonomic knowledge required;
labor-intensive
see 30
I) depth habitat may be vary
regionally (e.g. Bijma and
Hemleben 1994)
2) see 30
1)
see 30
2) how well do infaunal species
record pore-water
OI3C?
3)
are species co-occuring?
4) are there threshold values?
a,
.j:>.
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