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Richness of species and growth‐forms within sclerophyll and mesophyll vegetation in eastern Australia
Author(s) -
Brocque Andrew F.
Publication year - 1998
Publication title -
australian journal of ecology
Language(s) - English
Resource type - Journals
eISSN - 1442-9993
pISSN - 0307-692X
DOI - 10.1111/j.1442-9993.1998.tb00714.x
Subject(s) - species richness , sclerophyll , ecology , body size and species richness , species diversity , quadrat , shrub , vegetation (pathology) , biology , geography , medicine , pathology , mediterranean climate
The patterns in total species richness and in the richness of the dominant growth‐forms of vegetation communities of coastal sclerophyll and mesophyll vegetation in eastern Australia are examined. Plant species richness data were obtained from two 500 m 2 quadrats from 50 sites within a single geographical region north of Sydney, New South Wales. Concentrically nested subquadrats within each quadrat enabled the determination of species‐area relationships for total species richness and its components. Three growth‐forms were examined (trees, shrubs and ground cover) and patterns in the richness of these components were compared to those exhibited by total species richness. Total species richness was higher in sclerophyll communities on Hawkesbury Sandstone soils than in adjacent mesophyll communities on Narrabeen shales and sandstones. Significant patterns in total species richness within the two soil types were also found. Shrub and ground cover species richness showed strong correlations with total species richness, with higher richness in the sclerophyll communities. However, tree species richness contributed little to the patterns in total species richness. The results of this study suggest that differential patterns in the components of total species richness must be taken into account for effective modelling of natural areas based on species richness and diversity parameters.