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Authors LONG, WJL; MELLORS, JE; COLES, RG
Author Full Name LONG, WJL; MELLORS, JE; COLES, RG
Title SEAGRASSES BETWEEN CAPE YORK AND HERVEY BAY, QUEENSLAND, AUSTRALIA
Source AUSTRALIAN JOURNAL OF MARINE AND FRESHWATER RESEARCH
Language English
Document Type Article
Keywords Plus NEW-GUINEA SEAGRASSES; PAPUA-NEW-GUINEA; PENAEID PRAWNS; MORETON BAY; COMMUNITIES; BIOMASS; ECOLOGY; ISLANDS; REGION
Abstract The area of seagrasses in waters adjacent to the Queensland coast between Cape York and Hervey Bay is approximately 4000 km2. Seagrasses were found near estuaries, in coastal bays and associated with islands, at sites that provided shelter from the south-easterly trade winds and Pacific Ocean swells. Of the seagrass meadows mapped, 37% had a bottom vegetation cover greater than 50%. Two large continuous areas (total of approximately 2500 km2) of seagrass of predominantly Halophila species were found in deep water in Hervey Bay and between Barrow Point and Lookout Point and may be part of a much larger area of deep-water seagrass habitat not yet surveyed in the Great Barrier Reef province. Fourteen seagrass species were found in the surveyed region, and most were typical of the northern Australian and Indo-West Pacific region. The opportunistic Halophila and Halodule species were most common, with Halophila ovalis (R. Br.) Hook. f. and Halodule uninervis (Forsk.) Aschers. each being found in more than 15% of samples. High species richness occurred at depths of less than 6 m, predominantly in sheltered bays at coastal and island locations. Low species richness at estuary-associated sites may be due to stresses caused by low salinity during monsoonal runoff periods or exposure at low tides. Zostera capricorni Aschers. was restricted to these areas and may have a competitive advantage over other species with lesser tolerance to varying salinity. Species richness decreased with an increase in both latitude and depth. The latitudinal limits of recorded distributions for some of these tropical seagrasses were confirmed. Seagrass biomass decreased with increasing depth, but parameters of seagrass abundance showed no correlation with latitude, being dependent on a complex of site-related factors. High seagrass biomass occurred at sheltered sites, including estuary-associated, coastal-bay and island-associated sites. The maximum recorded above-ground biomass was 102.9 g m-2 for Zostera capricorni at Upstart Bay. Shoot densities reached 13 806 shoots m-2 for Halophila ovalis at Escape River, and the highest leaf area index was 1.81 for Zostera capricorni at Upstart Bay.
Reprint Address LONG, WJL (corresponding author), QUEENSLAND DEPT PRIMARY IND,CTR NORTHERN FISHERIES,BOX 5396,CAIRNS,QLD 4870,AUSTRALIA.
ResearcherID Number Coles, Robert G/O-5638-2014
Times Cited 51
Total Times Cited Count (WoS, BCI, and CSCD) 52
Publisher C S I R O PUBLICATIONS
Publisher City COLLINGWOOD
Publisher Address 150 OXFORD ST, PO BOX 1139, COLLINGWOOD VICTORIA 3066, AUSTRALIA
ISSN 0067-1940
29-Character Source Abbreviation AUST J MAR FRESH RES
Year Published 1993
Volume 44
Issue 1
Beginning Page 19
Ending Page 31
Page Count 13
Web of Science Category Fisheries; Limnology; Marine & Freshwater Biology; Oceanography
Subject Category Fisheries; Marine & Freshwater Biology; Oceanography
Document Delivery Number LH428
Unique Article Identifier WOS:A1993LH42800003
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