Differences in litter characteristics and macroinvertebrate assemblages between litter patches in pools and riffles in a headwater stream

  title={Differences in litter characteristics and macroinvertebrate assemblages between litter patches in pools and riffles in a headwater stream},
  author={S. Kobayashi and Takashi Kagaya},
Abstract We compared the abundance of litter categories (coarse particulate organic matter 1–16 mm, leaves >16 mm, and small woody detritus 16–100 mm) and macroinvertebrate assemblages between natural litter patches in pools and riffles in a headwater stream. Litter patches in pools were formed under conditions of almost no current (<6 cm s−1), but in riffles they were formed under variable current velocities (13–89 cm s−1). Although the abundance of each litter category exhibited seasonal… 

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The results indicate that macroinvertebrate community structure and production may differ within and among forested streams according to relative composition of litter patch types, even if overall litter abundance is similar.

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The retention pattern of leaf species with different leaf sizes and a released experiment of leaf particles revealed that proportionally more leaf particles with smaller sizes were retained on middle patches, and the flexibility, shape and dryness of litter particles also seem to affect the location of retention in the channel.

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In both pools and riffles, macroinvertebrate communities varied with time, showing a diminution of stream habitability, correlated with progressive water withdrawal, and non-shredder invertebrates may indirectly contribute to the decomposition of leaf material.

Ephemeroptera, Plecoptera and Trichoptera assemblages in litter in a mountain stream of the Atlantic Rainforest from Southeastern Brazil

The study of Ephemeroptera, Plecoptera and Trichoptera associated with litter in southeastern Brazil streams aimed to answer the following questions: 1) Does richness and composition of EPT fauna

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The potential importance of microbes was indicated by a relationship between breakdown rates and stream PO4 concentrations, and when the 2 moderately nutrient-enriched streams were excluded, breakdown rates were positively related to obligate shredder densities, indicating a possible contribution of shredders to litter breakdown.

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Influence of Pools and Riffles on Chironomidae Diversity in Headwater Streams of the Atlantic Forest

There was a difference in the composition of the Chironomidae assemblages between the mesohabitats, although the litter composition was similar between them, indicating the importance of current speed on the distribution of the taxa.

Physical factors affecting the distribution of leaf litter patches in streams: comparison of green and senescent leaves in a step-pool streambed

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Effects of Detritus Loading and Fish Predation on Leafpack Breakdown and Benthic Macroinvertebrates in a Woodland Stream

  • S. R. Reice
  • Environmental Science
    Journal of the North American Benthological Society
  • 1991
It is shown that CPOM loading and fish predation were not major forces in determining the diversity, richness, or litter breakdown rates of this lotic community, and suggests that leafpacks function as a refuge from fishpredation for macrobenthic invertebrates.

The Role of Substratum in Benthic Macroinvertebrate Microdistribution and Litter Decomposition in a Woodland Stream

The results emphasize the importance of substratum size as a prime determinant of the structure of lotic macroinvertebrate communities.

Seasonal Food Limitation of Detritivores in a Montane Stream: An Experimental Test

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A test of resource limitation among shredding detritivores in low order streams in southern England

The results indicate that resource limitation may occur among mobile detritivorous invertebrates in low-order streams and it is speculated that leaf litter may be limiting as a habitat for shredders as well as a source of food.

Seasonal Variation in Standing Crop and Species Diversity of Insect Communities in a small Quebec Stream

When compared with other aquatic environments, the bottom fauna of the stream has oligotrophic features, including a large number of species and an annual standing crop of poor to intermediate richness.


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A comparison between stream community processing rates of naturally entrained leaf litter and leaves in packs or 1 mm-mesh bags demonstrated that packs served as a suitable analogue of processing in

Effects of large woody debris placement on stream channels and benthic macroinvertebrates

Large woody debris was added as an experimental stream restoration technique in two streams in southwest Virginia to compare human judgement in log placements against a randomized design and an unmanipulated reach, and also to compare effectiveness in a low- and a high-gradient stream.

Effect of predatory fish presence on habitat use and diel movement of the stream amphipod, Gammarus minus

The distribution of amphipods in streams is influenced by the presence of fish, but chemical cues alone may not be important in triggering predator avoidance behaviours in nature.

Detrital processing and associated macroinvertebrates in a Colorado mountain stream

Investigation of leaf litter processing in a Colorado mountain stream revealed that processing of alder, willow, and aspen occurred at rapid rates despite water temperatures at or near 00C, indicating the importance of fine particulate organic matter in determining the suitability of Leaf litter as habitat for fine particle-feeding detritivores.