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S O N D J F M A M J J A S O N D

1998

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5,000

1,000

100

10

5

Bacteria

Crenarchaeota

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14

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9

9

14

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9

All probes

0 20 40 60 80

10

100

1,000

5,000

Microbial domains

Crenarchaeota Euryarchaeota Bacteria

Negative controlSum of probes

Percentage of DAPI count

Depth (m)

a b

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103 104 105 106

10

100

1,000

Sum of probes5,000

Total microbial cells per ml

Depth (m)

ArchaeaBacteria

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Relatedness contrasts

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