The breakdown of buried and surface-placed leaf litter in an upland stream

The breakdown of buried leaves (Eucalyptus viminalis) was investigated using surface-placed and buried leaf packs in a riffle of the Acheron River, Victoria. Leaf packs buried to a depth of 10 cm were rapidly colonized by invertebrates, with the total numbers of individuals and species exceeding those on surface leaf packs. A larger proportion of leaves in buried leaf packs was grazed in comparison with those on the surface, with the intensity of grazing also being higher for leaves in buried packs. Both surface and buried leaf packs broke down rapidly with no significant difference in weight loss with time. The high level of breakdown of buried E. viminalis leaf litter observed in this study suggests that the hyporheos of Australian headwater streams may significantly contribute to the decomposition of particulate organic matter.

[1]  Robert C. Petersen,et al.  Leaf processing in a woodland stream , 1974 .

[2]  J. Sedell,et al.  Detritus Processing by Macroinvertebrates in Stream Ecosystems , 1979 .

[3]  J. Flannagan.  An Introduction to the Aquatic Insects of North America. , 1979 .

[4]  M. Klug,et al.  Feeding Ecology of Stream Invertebrates , 1979 .

[5]  Gary N. Herbst,et al.  Effects of burial on food value and consumption of leaf detritus by aquatic invertebrates in a lowland forest stream. , 1980 .

[6]  M. Winterbourn,et al.  Leaf processing in two contrasting beech forest streams: effects of physical and biotic factors on litter breakdown , 1983 .

[7]  Frederick J. Swanson,et al.  Organic Matter Budgets for Stream Ecosystems: Problems in their Evaluation , 1983 .

[8]  David M. Rosenberg,et al.  The Ecology of Aquatic Insects , 1984 .

[9]  B. Chessman.  Dietary studies of aquatic insects from two Victorian rivers , 1986 .

[10]  S. Bunn.  Origin and Fate of Organic Matter in Australian Upland Streams , 1986 .

[11]  C. Hawkins,et al.  Bioenergetic Considerations in the Analysis of Stream Ecosystems , 1988, Journal of the North American Benthological Society.

[12]  R. Marchant,et al.  Vertical Distribution of Benthic Invertebrates in the Bed of the Thomson River, Victoria , 1988 .

[13]  Joy B. Perry,et al.  Shredders and Riparian Vegetation , 1989 .

[14]  P. S. Lake,et al.  Colonization of experimentally disturbed patches by stream macroinvertebrates in the Acheron River, Victoria , 1989 .

[15]  James H. Thorp,et al.  Effects of burial and floodplain retention on stream processing of allochthonous litter , 1989 .

[16]  L. A. Smock,et al.  Storage and Dynamics of Subsurface Detritus in a Sand-Bottomed Stream , 1990 .

[17]  T. Arsuffi,et al.  Selective feeding by shredders on leaf-colonizing stream fungi: comparison of macroinvertebrate taxa , 1989, Oecologia.