Temporal and fine-scale variation in the biogeochemistry of Jervis Bay

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CERF Marine Biodiversity Hub Jervis Bay Survey Report, February 20093. Preliminary Results3.1 BIOLOGYSieved material varied across station and included samples dominated by chaetopteridworms, seagrass, drift algae, coarse sand, and miscellanous biogenic fragments (Figure5). Initial observations suggest that variation among infaunal assemblages is greateramong stations (hundreds of meters) than within replicates at stations (meters).Figure 5: Material retained on a 500 μm sieve from Van Veen grab samples, representinga range of biological assemblages including those dominated by a) chaetopterid worms,likely Mesochaetopterus minutes (Station 73), b) seagrass (Station 64), c) drift algae(Station 62), d) coarse sand (Station 66), and e) shell grit and miscellaneous biogenicfragments (Station 78). Photos by R. Przeslawski.10
CERF Marine Biodiversity Hub Jervis Bay Survey Report, February 2009Similar animals were collected across winter (GA309) and summer (KIMBLA0109)surveys, including amphipods, chaetopterid worms, scallops, heart urchins, crinoids, andbrittlestars (Figure 6). In addition, we sampled several macrofauna during summer thatwere not collected on the winter survey (Figure 7), although these often occurred once orat a single station.Figure 6: Taxa collected on both the winter (GA309) and summer (KIMBLA0109)surveys: a) Pectinidae (mason worm), b) Echinocardium sp. (heart urchin), c) Limidaebivalve, d) crinoid, e) asteroid (seastar), f) crab, g) ophiuroid (brittlestar), and h)neogastropod. Photos by R. Przeslawski.11
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Temporal and fine-scale variation in the biogeochemistry of Jervis Bay

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