Abstract
Abstract Benthic communities in the upper regions of Lyttelton Harbour, Christchurch, New Zealand (43° 38’ S, 172° 41’ E), are defined by correlating the species present with the sediment types and their organic carbon content. Lyttelton Harbour has been a major port since the 1860s, and is extensively dredged. It is in the crater of an ancient volcano, the walls of which are covered with loess, which is the principal source of bottom, sediments. The sampling characteristics of an orange peel grab, a box. dredge, and an epibenthic sledge, determined in comparable working conditions, proved sufficiently different to justify the use of all three in taking the 71 benthic fauna samples for this study. Sediment grades were determined from dredge samples by sieving and pipetting, and 40 of them were classified into coarse sand (‐2.0 to +0.250), fine sand (0.25 to 3.0 ⊘), muddy sand (3.0 to 4.75 ⊘), and mud (>4.75 ⊘). Determination of sediment organic carbon was by a modified wet combustion method. Data were ana...
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