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Item Description Grigg, Richard W. en_US 2008-10-29T05:34:26Z 2008-10-29T05:34:26Z 1997-07 en_US
dc.identifier.citation Grigg RW. 1997. Benthic communities on Lo'ihi submarine volcano reflect high-disturbance environment. Pac Sci 51(3): 209-220. en_US
dc.identifier.issn 0030-8870 en_US
dc.description.abstract Bottom surveys and collections on Lo'ihi Seamount, Hawai'i, revealed two distinct and recurrent benthic communities. One comprises bacterial mats and is closely associated with hydrothermal vents. The other consists of dense aggregations of megabenthos-octocorals, sponges, hydroids, and black corals-all normal inhabitants of nonvolcanic hard-bottom habitats at comparable depths in the Hawaiian Islands. The bacterial mats are devoid of specialized megafauna and are found in summit areas or rift peaks where diffuse low-temperature hydrothermal vents are common. The absence of megafauna there may be due to extreme environmental conditions produced by vent waters that contain no oxygen and extraordinarily high concentrations ofCO2 (pH = 5.5) and trace metals. At greater depths, from 200-300 to 1,000m below the summit, dense aggregations of gorgonians and other megafauna exist but are uncommon. Aggregations are restricted to stable outcrops of pillow basalts (kipukas). Surrounding areas are covered by talus and are virtually devoid of benthic organisms. Their rarity may be due to instability of the substratum caused by frequent slumping and debris avalanching (mass wasting). Both bacterial mat and deep flank megabenthic communities reflect a high-disturbance environment. en_US
dc.language.iso en-US en_US
dc.publisher University of Hawaii Press en_US
dc.title Benthic Communities on Lo'ihi Submarine Volcano Reflect High-Disturbance Environment en_US
dc.type Article en_US
dc.type.dcmi Text en_US

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