eHALOPH - Halophytes Database

Publication Type	J
Authors	Walker, D. I. and M. L. Cambridge
Title	AN EXPERIMENTAL ASSESSMENT OF THE TEMPERATURE RESPONSES OF 2 SYMPATRIC SEAGRASSES, AMPHIBOLIS-ANTARCTICA AND AMPHIBOLIS-GRIFFITHII, IN RELATION TO THEIR BIOGEOGRAPHY
Source	Hydrobiologia
Abstract	Walker, D. I. and Cambridge, M. L. 1994. An experimental assessment of the temperature responses of two sympatric seagrasses, Amphibolis antarctica and Amphibolis griffithii, in relation to their biogeography. Seedlings of the viviparous seagrasses, Amphibolis antarctica (Labill.) Sonder & Aschers. and Amphibolis griffithii (Black) den Hartog, were grown in seawater cultures at temperatures of 10-30-degrees-C. This temperature range exceeded the range of temperatures occurring in habitats where Amphibolis grows. All seedlings of both species survived at 15-degrees-C, and all A. antarctica at 10 and 20-degrees-C. There was some mortality at 25-degrees-C, but more in A. griffithii than in A. antarctica. All seedlings showed marked senescence at 30-degrees-C within 2 weeks, and all seedlings of both species were dead at this temperature in 6 weeks. Leaf production rates were different at different temperatures for each species, but were high across the 15-25-degrees-C temperature range for both species. Given the time of release of seedlings from parent plants (winter), these results are consistent with the observed distribution of adult plants, and so the more restricted range of A. griffithii can be explained partially by its' response to temperature in culture. These results do not explain the absence of both Amphibolis species from the east coast of Australia, which may be a consequence of habitat availability.
ISSN	0018-8158
ISBN	0018-8158
Publication Date	Mar 31
Year Published	1995
Volume	302
Issue	1
Beginning Page	63-70
Digital Object Identifier (DOI)	10.1007/bf00006399
Unique Article Identifier	WOS:A1995RB62600006
Plants associated with this reference	Amphibolis antarctica Amphibolis griffithii