Factors Limiting the Recruitment of Eucalyptus salmonophloia in Remnant Woodlands. I. Pattern of Flowering, Seed Production and Seed Fall

Colin J. Yates, Richard J. Hobbs, Richard W. Bell

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Woodlands dominated by Eucalyptus salmonophloia F. Muell. occur throughout the fragmented landscape of the Western Australian wheatbelt. In most of these remnant woodlands, there is no regeneration of E. salmonophloia and this has become a concern for the conservation of biodiversity in the region. This study examined seed production, seed viability and pattern of seed fall in four remnant populations of E. salmonophloia in the central wheatbelt of Western Australia, to determine whether these factors are limiting recruitment. Surveys of flowering, seed production and seed fall were conducted over a two-year-period which included three potential flowering seasons. Individual trees flowered once over this period and the intensity of flowering and the proportion of flowers which set seed varied greatly between remnants. Seed from up to two consecutive flowering seasons was stored in the canopy, thus, E. salmonophloia formed substantial canopy seed stores. Seeds were released from this store throughout the year and seed fall showed only a weak winter decline. The viability of seeds released from the canopy store in each remnant population was high. These results indicate that the availability of viable seed is unlikely to be responsible for the lack of E. salmonophloia recruitment in remnant woodlands.

Original languageEnglish
Pages (from-to)531-542
Number of pages12
JournalAustralian Journal of Botany
Volume42
Issue number5
DOIs
Publication statusPublished - 1 Jan 1994
Externally publishedYes

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