ARAN - Access to Research at NUI Galway

Algal epiphytes of Zostera marina: variation in assemblage structure from individual leaves to regional scale

ARAN - Access to Research at NUI Galway

Show simple item record

dc.contributor.author Johnson, Mark P. en
dc.date.accessioned 2009-09-21T15:33:01Z en
dc.date.available 2009-09-21T15:33:01Z en
dc.date.issued 2005 en
dc.identifier.citation Johnson, M. P., Edwards, M., Bunker, F. & Maggs, C. A. 2005. "Algal epiphytes of Zostera marina: variation in assemblage structure from individual leaves to regional scale." Aquatic Botany 82, 12-26. en
dc.identifier.uri http://hdl.handle.net/10379/307 en
dc.description.abstract Algal epiphytes can be an important component of seagrass ecosystems, but spatial variability in epiphyte assemblages has not often been characterised. Data from a hierarchical study of four Zostera marina beds in Wales were used to identify the spatial scales of variation in epiphyte assemblages. There were significant within and among bed differences in assemblage structure. The differences in assemblage structure with spatial scale generally persisted when species identifications were aggregated into functional groups. There was also significant within and among bed variability in Zostera density and average length. Local variations in Zostera canopy variables at the quadrat scale (total leaf length, average leaf length and leaf density per quadrat) were not related to epiphyte species richness or to the structure of the assemblage. In contrast, individual leaf length was significantly related to species richness in two of the beds and the structure of epiphyte assemblages was always related to individual leaf lengths. The absence of links between quadrat scale measurements of canopy variables and assemblage structure may reflect the high turnover of individual Zostera leaves. Experimental work is required to discriminate further between the potential causes of epiphyte assemblage variation within and between beds. No bed represented a refuge where a rare species was abundant. If a species was uncommon at the bed scale it was also uncommon in beds where it occurred. The heterogeneous assemblages found in this study suggest that a precautionary approach to conservation is advisable. As much of a bed as possible should be retained, both to protect the integrity of local assemblages and to retain rare species at regional scales. en
dc.format application/pdf en
dc.language.iso en en
dc.publisher Elsevier en
dc.subject algal en
dc.subject biodiversity en
dc.subject heterogeneity en
dc.subject rarity en
dc.subject functional groups en
dc.subject.lcsh Algal populations en
dc.subject.lcsh Algal communities en
dc.subject.lcsh Ecological heterogeneity en
dc.subject.lcsh Rare plants en
dc.subject.lcsh Population biology en
dc.subject.lcsh Functional groups en
dc.title Algal epiphytes of Zostera marina: variation in assemblage structure from individual leaves to regional scale en
dc.type Article en
dc.identifier.doi doi:10.1016/j.aquabot.2005.02.003 en
dc.local.publishedsource http://dx.doi.org/10.1016/j.aquabot.2005.02.003 en
dc.description.peer-reviewed peer-reviewed en

Files in this item

This item appears in the following Collection(s)

Show simple item record