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Biology Articles » Hydrobiology » Marine Biology » Impact of polychaetes (Nereis spp. and Arenicola marina) on carbon biogeochemistry in coastal marine sediments » Tables

Tables
- Impact of polychaetes (Nereis spp. and Arenicola marina) on carbon biogeochemistry in coastal marine sediments

Table 1
Examples of irrigation rate of Nereis virens, N. diversicolor and Arenicola marina. Results are presented both as individual rates [(g worm) h-1] and as population rates (m2 d-1). The abbreviations (ns) and (s) indicate non-suspension-feeding and suspension-feeding N. diversicolor.[9,28]


Irrigation


Species
 Density/m-2
 Individual/ml g-1 h-1
 Population/1 m-2 d-1
N. virens
 600
 21–62
 60–180
N. diversicolor (ns)
 600
 200–250
 580–720
N. diversicolor (s)
 600
 450–500
 2600–2900
A. marina
 50
 10–13
 120–160
Table 2
Examples of annual particle reworking rates by Nereis diversicolor and Arenicola marina. Results are presented both as volume of sediment m-2 and as depth of sediment reworked[19,52]


Reworking


Species
 Density/ind. m-2
Volume/1 m-2 y-1
 Depth/cm y-1
N. diversicolor
 1000
 7
 0.7
A. marina
 40–80
 170–400
 17–40
Table 3
Enhancement of benthic metabolism (O2 uptake or CO2 release) in sandy sediment inhabited by Nereis spp. and Arenicola marina. Values are given as percent difference between faunated and defaunated sediment (flux enhancement). The experimental conditions are indicated as: homog. = homogenized sediment in laboratory, intact = intact, but defaunated sediment in laboratory, in situ = in situ measurementa
Species
 Exp. conditions
 Density/ind. m-2
 Flux enhancement (%)
N.virens[42]
 homog.
 600
 74
N. virens[54]
 homog.
 1800
 152
N. virens[47]
 intact
 800
 79
N. virens[9]
 homog.
 600
 74
N. diversicolor[48]
 intact
 1990
 70
N. diversicolor[49]
 homog.
 1430
 45
N. diversicolor[50]
 intact
 1390
 81
N. diversicolor[50]
 in situ
 1000
 25
N. diversicolor[46]
 homog.
 1190
 174
N. diversicolor[45]
 homog.
 600
 81
N. diversicolor[9]
 homog.
 600
 94
N. diversicolor[51]
 intact
 2000
 98
A. marina[45]
 homog.
 600
 260
A. marina[52]
 in situ
 60
 10
A. marina[52]
 homog.
 200
 162
aNote that specimens of A. marina used in homogenized sediment were juveniles.

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