Title of article :
Plankton community structure and connectivity in the Kimberley-Browse region of NW Australia
Author/Authors :
McKinnon، نويسنده , , A.D. and Duggan، نويسنده , , S. and Holliday، نويسنده , , D. and Brinkman، نويسنده , , R.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2015
Pages :
12
From page :
156
To page :
167
Abstract :
We describe the zooplankton and ichthyoplankton communities of coastal waters of the Kimberley coast (North West Australia), sampled in macrotidal Camden Sound during both the wet and dry seasons of 2011, and compare these to six other Kimberley embayments during the wet season of 2013. Zooplankton abundance in Camden Sound was 7038 ± 3913 SD ind. m−3 in the wet season and 1892 ± 708 SD ind. m−3 in the dry season, with copepods accounting for 85% by number. In all, 78 species of copepods were recorded, with the families Paracalanidae and Oithonidae dominant. In Camden Sound, 48 families of larval fish occurred, with ichthyoplankton more abundant in the wet season than the dry season (1.16 ± 0.2 ind. m−3 cf 0.76 ± 0.2 ind. m−3). Larval gobiids (Subfamily Gobiinae) were most abundant, with other common families associated with either pelagic or soft-bottom habitats as adults. Multivariate analyses of both copepod and ichthyoplankton communities demonstrated strong seasonal contrasts, although an along-shelf gradient in copepod community composition was apparent along the embayments sampled in 2013. There was little spatial variation in plankton communities within Camden Sound as a result of the large tidal range (up to 11.7 m, with 2.5 m−1 velocities), although gradients in abundance and composition on cross-shelf transects occurred in the more northern embayments that had a lower tidal range, such as Napier Broome Bay. Copepod communities of the Kimberley-Browse region were placed in regional perspective by multivariate analyses of similar data collected in the eastern Indian Ocean at Scott Reef, in the Arafura Sea and on the southern North West (NW) shelf. The plankton communities of the NW shelf form a series of along-shore metacommunities linked by advection, with weaker cross-shelf connectivity. The presence of the larvae of mesopelagic fishes of the family Myctophidae in coastal waters confirms seasonal cross-shelf connectivity.
Keywords :
Kimberley , Zooplankton , Ichthyoplankton , Community composition , connectivity , macrotidal
Journal title :
Estuarine, Coastal and Shelf Science
Serial Year :
2015
Journal title :
Estuarine, Coastal and Shelf Science
Record number :
1946807
Link To Document :
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