Library Open Repository

Predicting bryophyte diversity in grassland and eucalypt-dominated remnants in subhumid Tasmania

Downloads

Downloads per month over past year

Pharo, EJ and Kirkpatrick, JB and Gilfedder, L and Mendel, LC and Turner, PAM (2005) Predicting bryophyte diversity in grassland and eucalypt-dominated remnants in subhumid Tasmania. Journal of Biogeography, 32. pp. 2014-2024. ISSN 0305-0270

[img] PDF
Pharo_etal_2005.pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.

Abstract

To determine the environmental factors associated with bryophyte diversity in remnants in a fragmented, agricultural landscape. Location Eighty-two remnants of tussock grassland, eucalypt woodland and eucalypt forest in the subhumid Midlands region of Tasmania, Australia. Methods Remnants were surveyed for bryophytes and predictor variables, such as vascular plant cover, climate, and topography. Management histories for each remnant were compiled using both site observation and landowner surveys. Bryophyte cover, richness, and composition were related to the independent variables using simple correlation and general linear models. Results We found weak relationships between the dependent variables and the fragmentation variables (remnant area, remnant perimeter to area ratio, distance to nearest remnant, distance to nearest larger remnant, and remnant age). Instead, climatic variables were important in predicting bryophytes, in particular those affecting humidity (minimum temperature of the coldest month, precipitation). Despite extensive sheep grazing in this landscape, grazing was not correlated with bryophyte diversity. Bryophyte diversity was not explained by vascular plant richness and was only weakly explained by composition, but was predicted by the cover of vascular plants. There was greater bryophyte cover and richness and different composition where the cover of native vascular plants was lower. Main conclusions The implications of our results are that all remnants, regardless of area, age and isolation, appear to be valuable for bryophyte conservation in this highly altered landscape. Our results also suggest that the cover of the vascular plant community, rather than its diversity, holds promise as a guide to bryophyte diversity. Bryophyte composition was similar between sites and a focus on the most species-rich sites may be the best conservation strategy in this ecosystem.

Item Type: Article
Keywords: agricultural landscape; bryophytes; climate; diversity; grazing; habitat fragmentation; remnant habitats; species richness; Tasmania large-scale fragmentation; old-growth forests; british-columbia; conservation; plant; communities; landscape; lichens; moss; soil
Journal or Publication Title: Journal of Biogeography
Page Range: pp. 2014-2024
ISSN: 0305-0270
Identification Number - DOI: 10.1111/j.1365-2699.2005.01366.x
Additional Information: The definitive version is available at www.blackwell-synergy.com
Date Deposited: 10 Sep 2007
Last Modified: 18 Nov 2014 03:22
URI: http://eprints.utas.edu.au/id/eprint/1884
Item Statistics: View statistics for this item

Repository Staff Only (login required)

Item Control Page Item Control Page