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… 

Litter patch types determine macroinvertebrate assemblages in pools of a Japanese headwater stream

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.

Across-reach consistency in macroinvertebrate distributions among litter patch types in Japanese headwater streams

Different types of litter patches with contrasting macroinvertebrate assemblages have been observed within a stream reach. This study examined whether distributions of macroinvertebrates among three

Dynamics of organic material and invertebrates in a tropical headwater stream

Headwater streams drain large proportions of landscapes and represent a large proportion of stream habitat. Understanding their ecology requires more comparative data from the smallest streams. We

Input, retention, and invertebrate colonization of allochthonous litter in streams bordered by deciduous broadleaved forest, a conifer plantation, and a clear-cut site in southwestern Japan

In headwater streams, conifer plantation forestry may affect stream communities through the quantity and quality of basal resources (allochthonous litter). We compared (1) the seasonal patterns of

Differences in patches of retention among leaves, woods and small litter particles in a headwater stream: the importance of particle morphology

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.

Colonisation of leaf litter by lotic macroinvertebrates in a headwater stream of the Phachi River (western Thailand)

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

Patterns of flow, leaf litter and shredder abundance in a tropical stream

The seasonal dynamics of leaf litter and associated consumers (“shredders”) in tropical streams are not well documented. We investigated the occurrence of litter (density and age composition) and

Shredders: species richness, abundance, and role in litter breakdown in tropical Hong Kong streams

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.

Disturbances structuring macroinvertebrate communities in steep headwater streams: relative importance of forest clearcutting and debris flow occurrence

This study shows that debris flow disturbances that alter in-channel physical conditions or displace organisms exert greater impacts on stream macroinvertebrate community structure than clearcutting



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.

Influence of log additions on physical and biotic characteristics of a mountain stream

Three pairs of cobble riffle study sites were established in a second-order stream in North Carolina and logs added to the downstream riffle at each site, suggesting that physiological and morpho-behavioral constraints preclude many animals from tracking resources among patches when ...

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

The responses of this community to food supplementation demonstrate food limitation of detritivores and the exponential increase in benthic biomass under food addition shows the scope for productivity if food were not limiting.

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.


We examined the importance of terrestrial detrital inputs to secondary productivity of a headwater stream. Following a year of pretreatment studies on two headwater streams, we excluded terrestrial

Processing of confined and naturally entrained leaf litter in a woodland stream ecosystem1

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.