Rhodolith habitats

The ecology of subtidal rhodolith beds has been investigated for the first time in New Zealand, characterising two rhodolith species, Lithothamnion crispatum and Sporolithon durum, examining the structure and physical characteristics of beds at two locations and documenting their associated biodiversity. Site and characteristics: Field work was conducted in the Bay of Islands, at Kahuwhera Bay and Te Miko Reef, in February and September 2010. The rhodolith beds were mapped using a combination of techniques and the physical characteristics of the habitats were assessed and compared with adjacent areas outside the rhodolith beds.The rhodolith beds differed significantly in terms of water motion, sediment characteristics and light levels, with Te Miko Reef having characteristics regarded as typical of rhodolith assemblages, and Kahuwhera Bay being atypical with respect to sediments and water clarity. The Te Miko Reef bed was in clear water and rhodoliths were clearly visible sitting on top of the substrate in a more or less single layer over rhodolith- and shell-derived gravel, whereas at Kahuwhera Bay there were fine sediments suspended in the water column and covering rhodoliths and associated biota, and live rhodoliths were in a more or less single layer overlaying grey to blackened rhodoliths in a darkly coloured rhodolith/sediment sublayer. The two rhodolith beds differed in current direction and strength with no clear tidal signal or direction of water motion at Kahuwhera Bay and tidally driven water movement at Te Miko Reef with a dominant northwest flow.Citation:  Nelson, W.A.; Neill, K.; Barr, N.; D'Archino, R.; Miller, S.; Stewart, R. (2012). Data from: Rhodolith Beds in Northern New Zealand: Characterisation of Associated Biodiversity. Southwestern Pacific OBIS, National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand, 684 records.Online: http://nzobisipt.niwa.co.nz/resource.do?r=rhodolithhabitats Released on June 20, 2015.Bibliographic Citation: Nelson, W.A.; Neill, K.; Barr, N.; D'Archino, R.; Miller, S.; Stewart, R. (2012) .Rhodolith Beds in Northern New Zealand: Characterisation of Associated Biodiversity and Vulnerability to Environmental Stressors New Zealand Aquatic Environment and Biodiversity Report No. 99. ISSN 1179-6480 (online). ISBN 978-0-478-40077-9 (online)

Data and Resources

Additional Info

Field Value
Theme ["geospatial"]
Author National Institute of Water and Atmospheric Research
Maintainer Tilmann Steinmetz
Maintainer Email Tilmann Steinmetz
Source http://data-niwa.opendata.arcgis.com/datasets/8bb954fb4b9f4806a127863abc55ff4e_0
Created 2016-06-09T02:26:27.000Z
Date modified 2019-01-16T22:27:56.760Z
Language English
Spatial {"type": "Polygon", "coordinates": [[[174.17883, -35.262650000000015], [174.1846, -35.262650000000015], [174.1846, -35.22885], [174.17883, -35.22885], [174.17883, -35.262650000000015]]]}
Source Identifier http://data-niwa.opendata.arcgis.com/datasets/8bb954fb4b9f4806a127863abc55ff4e_0
Record created January 24, 2019, Last Updated March 1, 2019