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Shredders appear to be scarce in many tropical streams, but few data are available about their abundance or role in litter breakdown in these systems. Shredder species richness, abundance, and biomass were investigated in 10 small streams (5 shaded, 5 unshaded) in Hong Kong as a step toward understanding the role of …
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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 through late dry, wet and early dry seasons in an Australian rainforest stream. Leaf litter packs of varying density and leaf age …
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ship between shredders and leaves, we analyzed along a gradient of 8-93% canopy cover biomass and abundance of shredders, ac-cumulated leaves and breakdown rates of local leaves to verify if these parameters were related to shade conditions and to each other. Three hypotheses were tested: i) shredder biomass, accumulated leaves and breakdown ...
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In the AWT, shredders breed through the year (Benson & Pearson, 1988; Nolen & Pearson, 1992), but increase in abundance towards the end of the dry season (Pearson, 2014), paralleling the mainpeakinlitterfall. Shreddersmaybeactiveinlitter packs in both riffles and pools and, although shredder biomass, abundance and species richness are often
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An autotrophic aquatic system implies higher abundance of periphyton, leading to higher abundance of scrapers compared to collectors and shredders. This implies high rate of primary production in the system, which may be associated with higher nutrient enrichment, more sunlight to support photosynthesis or lower flow velocities that cause drift.
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The low diversity and abundance of detrital shredders (DSH), and gathering (GC) and filtering (FC) collectors did not match the timing of evergreen leaf drop into the stream riparian zone. A possible explanation is likely due to the time require for the microorganisms to condition the recalcitrant evergreen leaves which delays rendering …
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The proportion of shredders in this study was dependent upon high canopy cover (Table 6), indicating that riparian vegetation benefits their subsistence. In this study, the abundance of shredders was very low even in less impacted stream order 1 sites; however, abundances decreased further along the land-use gradient (Table 4).
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The distribution of Plecoptera along a California river was used to test several predictions of the River Continuum Concept about how functional feeding groups should change along a stream's length.
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In this study, we explore how changes in the leaf litter quality and quantity influence the feeding preferences and growth of an invertebrate shredder (Potamophylax latipennis). To do so, we used …
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The diversity and abundance of macroinvertebrate shredders were investigated in 52 forested streams (local scale) from nine catchments (regional scale) covering a large area of peninsular Malaysia. A total of 10,642 individuals of aquatic macroinvertebrates were collected, of which 18.22 % were shredders. Biodiversity of …
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Shredders were scarce in terms of species richness (a total of 6 obligate shredders and 2 facultative shredders) and abundance (mean = 2.0%, range = 0–7.7% of total …
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While shredder abundance represented only 4–12% of total invertebrate abundance, shredder biomass constituted 19–36% of total invertebrate biomass.
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Early studies on terrestrial plant litter and shredders in freshwater systems found clear positive associations between standing litter stock and shredder abundance …
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ness, abundance, production, and temporal and spatial distribution of shredders in a sandy-bot-tomed, first-order stream on the Coastal Plain of ia. In addition, we provide informa-tion on the life histories and feeding habits of the dominant shredders, whose feeding was in-fluenced by leaf litter availability in the stream.
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Shredder abundance ranged from 0.7 to 4.2 individuals, on average, per sample. Species richness varied from 2 to 9 species, and functional diversity varied from 0.96 to 12.8 . All characteristics of the …
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Shredders in Malaysia: abundance and richness are greater in cool highland tropical streams. Journal of the North American Benthological Society 28:404–415. APPENDIX A Species, families, and orders of invertebrate shredders collected, and regions at which they were present (Ecological Archives E092-154-A1).
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Shredders play a crucial role in litter decomposition in streams. However, in oceanic islands, many streams have low shredder density and richness, and microbes seem to be the main litter decomposers. Here, we evaluate the effects of shredders and aquatic hyphomycetes on litter decomposition in insular streams. Three leaf species …
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Abundance, population structure and production of the macro-invertebrates belonging to the functional feeding group of the shredders were studied in the Ichkeul wetland, northern Tunisia, from July 1993 to April 1994.
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Shredders feed on larger pieces of organic matter such as leaves and woody debris. They include stoneflies (Figure 4) and some species of caddisflies. Collectors, such as blackflies and clams, gather …
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The abundance of shredders and collector-gatherers was higher in first-order compared to the second-order sites while scrapers were more abundant in the second-order sites, which were wider with an open canopy supporting abundant primary production. Even though the RCC model predicts these changes in the transition from …
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We found high diversity and abundance of shredders in all catchments, represented by 1,939 individuals (range 6–115 and average per site of 37.29 ± 3.48 …
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The results indicated that the increase of fine sediment in the river reduced the amount of coarse particulate organic matter, affecting the abundance of invertebrate shredders. In small alpine streams, where allochthonous organic matter is the main energy source, fine sedimentation reduces the availability of trophic resources, affecting the ...
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The diversity and abundance of macroinvertebrate shredders were investigated in 52 forested streams (local scale) from nine catchments (regional scale) covering a large area of peninsular Malaysia. A total of 10,642 individuals of aquatic macroinvertebrates were collected, of which 18.22% were shred …
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The abundance of shredders varied from 0 to 660 individuals per leaf litter bag (mean abundance per bag ± SD: north forested: 76.63 ± 125.17; north non-forested: …
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The present study aims to verify possible changes in the functional feeding group (FFG) structure of benthic macroinvertebrates related to changes in headwater streams riparian vegetation. Streams with this vegetation fully present (forested), present only on one bank (intermediate) and absent (pasture) were studied. In general, there …
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Even though shredders relative abundance was the least in all . sites. However, in terms of spatial distribution like the . scraper's, had the highest relative abun dance recorded in a .
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As expected, highland sites supported higher abundance and diversity of shredders (9–15 species per site) than did lowland sites (3–8 species per site). Shredder densities were similar among lowland sites, but species composition was variable. Large snails (Brotia spp.) were the dominant shredders in nonacidic streams in Taman …
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However, only the proportion of dominant shredders followed a pattern similar to their abundance, while the patterns of the other feeding groups were almost opposite; shredders peaked in late summer and autumn while gatherers and grazers peaked in early summer and the predators and passive filter feeders in spring (Fig. 6).
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Shredders accounted for ∼20% of total species richness in benthic samples in north-temperate streams (Appendix 2), compared to only ∼12% in tropical regions. In …
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