Integrating edge effects into studies of habitat fragmentation: a test using meiofauna in seagrass

Warry, F.Y., Hindell, J.S., Macreadie, P.I., Jenkins, G.P. and Connolly, Rod M. 2009, Integrating edge effects into studies of habitat fragmentation: a test using meiofauna in seagrass, Oecologia, vol. 159, no. 4, pp. 883-892, doi: 10.1007/s00442-008-1258-9.

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Title Integrating edge effects into studies of habitat fragmentation: a test using meiofauna in seagrass
Author(s) Warry, F.Y.
Hindell, J.S.
Macreadie, P.I.ORCID iD for Macreadie, P.I. orcid.org/0000-0001-7362-0882
Jenkins, G.P.
Connolly, Rod M.
Journal name Oecologia
Volume number 159
Issue number 4
Start page 883
End page 892
Total pages 10
Publisher Springer
Place of publication Berlin, Germany
Publication date 2009-04
ISSN 1432-1939
Keyword(s) Landscape ecology
Harpacticoid copepod
Seagrass
Edge effects
Fragmentation
Artificial seagrass units
Summary Habitat fragmentation is thought to be an important process structuring landscapes in marine and estuarine environments, but effects on fauna are poorly understood, in part because of a focus on patchiness rather than fragmentation. Furthermore, despite concomitant increases in perimeter:area ratios with fragmentation, we have little understanding of how fauna change from patch edges to interiors during fragmentation. Densities of meiofauna were measured at different distances across the edges of four artificial seagrass treatments [continuous, fragmented, procedural control (to control for disturbance by fragmenting then restoring experimental plots), and patchy] 1 day, 1 week and 1 month after fragmentation. Experimental plots were established 1 week prior to fragmentation/disturbance. Samples were numerically dominated by harpacticoid copepods, densities of which were greater at the edge than 0.5 m into patches for continuous, procedural control and patchy treatments; densities were similar between the edge and 0.5 m in fragmented patches. For taxa that demonstrated edge effects, densities exhibited log-linear declines to 0.5 m into a patch with no differences observed between 0.5 m and 1 m into continuous treatments. In patchy treatments densities were similar at the internal and external edges for many taxa. The strong positive edge effect (higher densities at edge than interior) for taxa such as harpacticoid copepods implies some benefit of patchy landscapes. But the lack of edge effects during patch fragmentation itself demonstrates the importance of the mechanisms by which habitats become patchy.
Language eng
DOI 10.1007/s00442-008-1258-9
Field of Research 060202 Community Ecology (excl Invasive Species Ecology)
0602 Ecology
Socio Economic Objective 970105 Expanding Knowledge in the Environmental Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2009, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30076241

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