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Response of shoal grass, Halodule wrightii, to extreme winter conditions in the Lower Laguna Madre, Texas

January 1, 1998

Effects of a severe freeze on the shoal grass, Halodule wrightii, were documented through analysis of temporal and spatial trends in below-ground biomass. The coincidence of the second lowest temperature (-10.6??C) in 107 years of record, 56 consecutive hours below freezing, high winds and extremely low water levels exposed the Laguna Madre, TX, to the most severe cold stress in over a century. H. wrightii tolerated this extreme freeze event. Annual pre- and post-freeze surveys indicated that below-ground biomass estimated from volume was Unaffected by the freeze event. Nor was there any post-freeze change in biomass among intertidal sites directly exposed to freezing air temperatures relative to subtidal sites which remained submerged during the freezing period.

Citation Information

Publication Year 1998
Title Response of shoal grass, Halodule wrightii, to extreme winter conditions in the Lower Laguna Madre, Texas
DOI 10.1016/S0304-3770(98)00084-9
Authors D.W. Hicks, C.P. Onuf, J.W. Tunnell
Publication Type Article
Publication Subtype Journal Article
Series Title Aquatic Botany
Series Number
Index ID 70020047
Record Source USGS Publications Warehouse
USGS Organization