Litter processing and shredder distribution as indicators of riparian
Shredder abundance was higher in forest compared with agriculture and mixed streams only during the wet season (Fig. 3). Potamonautes sp.1 was the most abundant …
اقرأ أكثر
Understanding | Stream Ecology | Macroinvertebrates
Monitoring their diversity, abundance, and distribution can offer clues to changes that are occurring over time in streams and rivers. Phylogeny and Adaptations to Lotic Environments ... Species adapted to coarse particulate organic matter (shredders) occupy reaches of the stream with a well-developed canopy, while species adapted to fine ...
اقرأ أكثر
Variation in species richness and relative abundance of stonefly
Download scientific diagram | – Variation in species richness and relative abundance of stonefly functional feeding groups (FFG's) in stream orders 1-6 of the Cosumnes River continuum ...
اقرأ أكثر
Detritivores in Kenyan highland streams: more evidence for the …
Three factors seemly explain the high richness and abundance of shredders in Gorgona Island: (1) its continental origin, (2) its current proximity to the continent (35 km), and (3) the high diversity and availability of leaf litter and woody debris inputs to the streams. Expand. 13
اقرأ أكثر
Full article: Spatial distribution patterns of benthic
The highest abundance of shredders in both rivers was at upstream sites (DS1 and SS1), more scrapers were found at midstream sites (DS3 and SS2), collector-gatherers and collector-filterers increased in the downstream (SS4) of the Spekboom River and predators were nearly constant in relative abundance at all sites.
اقرأ أكثر
Full article: Impacts of land use and environmental factors on
The RDA showed that the abundance of shredders, predators and collector-filterers increased in sites with increasing elevation and coarse substrate in the forest sites (Figure 4). This indicated that these FFGs were better suited to inhabit riparian vegetation and better water quality habitats, which are sensitive to disturbance and organic ...
اقرأ أكثر
Selecting Metrics to Determine Stream Health
Percent Abundance of Shredders *: the percent of the total number of individuals in the sample that use leaves and other plant debris as their primary food source. Percent Abundance of Predators: the percent of the total number of individuals in the sample that eat other animals as their primary food source. Population Attributes Metrics
اقرأ أكثر
Abundance, population structure and production of macro …
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 ...
اقرأ أكثر
Evaluating ecosystem functioning following river restoration: the …
The relative abundance of shredders was greater in heterogeneous habitat rivers (forest and restored rivers) than degraded rivers (Frainer et al., 2017), demonstrating the reasons for faster leaf decay in the forest and restored rivers compared to the degraded rivers.
اقرأ أكثر
Aquatic Macroinvertebrates
Shredders are responsible for processing coarse particulate organic matter (CPOM). CPOM is greater than 1 mm in size and typically derived from allochthonous sources, such as woody debris, leaves, and other …
اقرأ أكثر
Shredders: species richness, abundance, and role in litter
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 macroinvertebrate abundance).
اقرأ أكثر
(PDF) Shredders are abundant and species-rich in
the high richness and abundance of shredders . in Gorgonal Island, as a model continen-tal island: (1) its continental origin, (2) its . current proximity to the continent (35km),
اقرأ أكثر
Abundance of shredders and other …
Download scientific diagram | Abundance of shredders and other macroinvertebrates (no./g leaf dry mass) associated with coarse-mesh bags in the seven different habitat types (mean AE 1 SE, n = 4 ...
اقرأ أكثر
Shredders in Malaysia: abundance and richness are higher in …
Abstract Stream shredders have been reported as scarce in several tropical areas. This pattern is in contrast to observations in temperate streams, which support an abundant and diverse shredder fauna. Two possible explanations for this pattern are that most shredders are adapted to cool conditions and that temperate riparian vegetation often produces more palatable and …
اقرأ أكثر
Leaf-associated macroinvertebrate assemblage and leaf litter …
where C represents the respective community metric of either EPT or shredders (i.e., abundance, Shannon diversity, or biomass), V the riparian vegetation (two levels: forested and non-forested) and R the region (two levels: north and south). We included stream as a random factor to account for differences of background environmental conditions ...
اقرأ أكثر
Assessment of functional feeding groups (FFG) structure of …
The average relative abundance of Collector-gatherers decreased in S2, favoring the occurrence of Predators and Shredders. The relative abundance of Scrapers decreased drastically at S5 in favor of Collector-gatherers and Collector-filters. The proportion of Collector-gatherers increased downstream, with S1 representing the highest proportion.
اقرأ أكثر
Macroinvertebrate functional feeding group alterations in …
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).
اقرأ أكثر
(PDF) Role of Ephemeroptera, Plecoptera and Trichoptera (Insecta
The abundance of shredders in a river is affected by the amount of canopy cover on the water surface. Open rivers have less contribution of allocthonous organic matter that serves as food for most aquatic insects. In this case, Tupah River had very poor canopy hence fewer leaves were available in this river coinciding with lower CPOM stocks and ...
اقرأ أكثر
Boyero et al 2011 Global distribution of shredders. Ecology
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).
اقرأ أكثر
Shredders: species richness, abundance, and role in litter …
Abstract 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 shredders in tropical Asian streams. In …
اقرأ أكثر
Patterns of flow, leaf litter and shredder abundance in a tropical
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 ...
اقرأ أكثر
Mean (±1 SE) abundances of shredders (A), scrapers (B
The density and richness of shredders are low, and often absent, in semi-arid Brazilian lakes (Barbosa et al., 2012), but the relative abundance of scrapers is high (Barbosa et al., 2012 ...
اقرأ أكثر
Litter decomposition in a Cerrado savannah stream is retarded by …
The relative abundance of shredders was greater in heterogeneous habitat rivers (forest and restored rivers) than degraded rivers (Frainer et al., 2017), demonstrating the reasons for faster leaf ...
اقرأ أكثر
Shredders: species richness, abundance, and role in litter …
Shredders were scarce in terms of species richness (a total of 6 obligate shredders and 2 facultative shredders) and abundance (mean 1⁄4 2.0%, range 1⁄4 0–7.7% of total …
اقرأ أكثر
Non-commercial
On the other hand, shredder abundance and biomass, mainly represented by Triplectides (Trichoptera, Leptoceridae), was positively related to accumulated leaves within sites and to …
اقرأ أكثر
Estimating Macroinvertebrate Biomass for Stream Ecosystem …
The presence and abundance of macroinvertebrate FFGs reflect the availability of respective food resources; in turn, the abundance and availability of these food resources depend on stream ecosystem conditions . For scrapers and herbivorous shredders, critical conditions include the levels of light and nutrients.
اقرأ أكثر
Shredders are abundant and species-rich in tropical …
Mean abundance, richness and mean biomass of shredders were not significantly correlated with any of the environmental variables measured. Three factors seemly explain the high richness and abundance of shredders in Gorgona Island: (1) its continental origin, (2) its current proximity to the continent (35 km), and (3) the high
اقرأ أكثر
Relative influence of shredders and fungi on leaf litter …
in fine-mesh bags (excluding shredders) and coarse-mesh bags (including shredders) to separate effects of shredders and microorganisms. Specifically, we hypothesized that: (1) Decomposition in fine-mesh bags would be faster downstream than upstream, but decompo-sition rate in coarse-mesh bags would show a smaller difference between upstream ...
اقرأ أكثر
Shredders in Malaysia: abundance and richness are higher in …
Stream shredders have been reported as scarce in several tropical areas. This pattern is in contrast to observations in temperate streams, which support an abundant and diverse shredder fauna. Two possible explanations for this pattern are that most shredders are adapted to cool conditions and that temperate riparian vegetation often produces more palatable and more …
اقرأ أكثر
Benthic macroinvertebrates of tropical streams: functional and …
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 their ...
اقرأ أكثر