Show simple item record

dc.contributor.authorMerrett, M. F.
dc.date.accessioned2012-09-17T03:52:38Z
dc.date.available2012-09-17T03:52:38Z
dc.date.issued2007
dc.identifier.citationMerrett, M. F. (2007). Sex ratios, fruit set and size-class structure in the threatened, gynodioecious, sand-dune species Pimelea arenaria (Thymelaeaceae) from New Zealand. Australian Journal of Botany, 55(5), 554-560.
dc.identifier.urihttp://hdl.handle.net/11072/1206
dc.description.abstractPimelea arenaria sens. str. Cunn. is one of a small suite of native species that occur exclusively on unconsolidated sand dunes and in dune hollows of the North Island and Chatham Islands of New Zealand. It has become extinct at several beaches, and is currently listed in the Gradual Decline category of threatened plants. Eighteen populations of P. arenaria from throughout the North Island of New Zealand were investigated to determine sex ratios, fruit set and population size-class structures. Sex ratios were variable among the 18 study populations; the proportion of females was higher in populations in the northern half of the North Island (15.9�45.5%) than in populations from Kawhia southwards (0�12.7%). Females were absent from three south-western coastal populations. Although fruit set was relatively high, averaging 47% for female and 68% for hermaphroditic plants, recruitment failure was evident at most of the 18 sites surveyed. There was no evidence that sex ratios or fruit set were factors contributing to recruitment failure. Although most of the populations surveyed are not under immediate threat, lack of recruitment could affect population persistence in the long term.
dc.language.isoen
dc.subjectPimelea arenaria (Thymelaeaceae)
dc.subjectSand dunes
dc.subjectNew Zealand
dc.subject.other270000 Biological Sciences
dc.titleSex ratios, fruit set and size-class structure in the threatened, gynodioecious, sand-dune species Pimelea arenaria (Thymelaeaceae) from New Zealand.
dc.typeJournal Article
opnz.dateCopyrighted5
opnz.dateSubmitted554
opnz.description560
opnz.extentAustralian Journal of Botany
opnz.hasPart55


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record