Secondary production as part of bioenergetic theory—contributions from freshwater benthic science

Benke, Arthur C.

doi:10.1002/rra.1290

Cited by 46 publications

(40 citation statements)

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“…Decrease in the density of feeding groups may be caused by the presence of predators with sizes bigger than the primary consumers. In the case of chironomids (consumers), it may mean that, in spite of presenting higher biomass rotation and being constant in most habitats (Benke 2010), they are also more susceptible to predation (Wallace and Webster 1996), probably due to the smaller size (\10 mm in our study) and low mobility (Roque et al 2004). …”

Section: Discussionmentioning

confidence: 68%

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Environmental effects and urban impacts on aquatic macroinvertebrates in a stream of central Brazilian Cerrado

Salcedo

Padovesi-Fonseca

2015

Sustain. Water Resour. Manag.

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The urban effects on macroinvertebrate trophic structure were evaluated in a stream located in central Brazilian Cerrado. Samplings were evaluated from May/ 2004 to March/2005 in the upper, middle and lower sections. Characterization of ecological conditions and habitat diversity indicated headwater as ''natural'' site, up and downstream the urban region were ''altered'' ones, and the sites located nearest to urban area were considered ''impacted''. A well oxygenated and transparent water, acid pH, low electrical conductivity (\0.22 lS/cm), and low nutrients concentrations (\0.03 mg/L PO 4 -2 , \0.05 mg/L N-NH 4 and \3.0 mg/L N-NO 3 -2 ) was registered for headwater area. Stretches located near the urban region had higher electrical conductivity (48-100 lS/cm), higher ammonium (7.16 mg/L), and poor oxygenated water. The trophic organization was different along the stream and related to environmental preservation degree. Shredders occurred only in the headwater (Phylloicus sp., Trichoptera). Predators were dominant in upstream sites of the urban area ([90 % of biomass). In the sites located near the urban area, an alternative predominance was observed between gathering collectors and predators, with the gathering collectors dominance in the area impacted by city sewage inflow ([90 %). There was a progressive participation of scrapers in stretches located downstream of the city. Biomass was dominated by predators ([50 % in six sites) encompassing larger organisms ([20 mm), and gathering collectors were density dominants (from 53 to 99 %). Predators were the most dominant functional feeding group (22 taxa), followed by scrapers (eight), gathering collectors (seven) and filtering collectors (five). The results state that the Sobradinho stream is under different degrees of environmental impacts with lower preservation levels of its natural conditions, even in areas close to its headwater.

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Section: Discussionmentioning

confidence: 68%

“…Biomass and secondary production have been used to address many ecological questions concerning the construction of quantitative food webs and to assess the effects of pollution and catchment land use change (Benke 2010).…”

Section: Introductionmentioning

confidence: 99%

Environmental effects and urban impacts on aquatic macroinvertebrates in a stream of central Brazilian Cerrado

Salcedo

Padovesi-Fonseca

2015

Sustain. Water Resour. Manag.

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“…Some of the original motivations for understanding biological productivity stem from the need to estimate the annual production of fishes that can be taken from a body of water (1,2). By integrating multiple metrics that can individually reflect aspects of fitness (e.g., density, biomass, growth, fecundity, survivorship, body size, life span), secondary production can be thought of as a general criterion of success for a population (3,4). Recent studies have extended this idea, using secondary fish production to provide a measure of the productive capacity and economic value of specific habitats within an ecosystem (5,6) and, in a few instances, to evaluate the efficacy of creating artificial reefs and other forms of habitat restoration (7)(8)(9).…”

mentioning

confidence: 99%

“…Recent studies have extended this idea, using secondary fish production to provide a measure of the productive capacity and economic value of specific habitats within an ecosystem (5,6) and, in a few instances, to evaluate the efficacy of creating artificial reefs and other forms of habitat restoration (7)(8)(9). In ecological studies, static properties such as density or biomass are typical structural response variables, whereas the use of secondary production, a functional measure, has been mostly limited to freshwater and marine benthic invertebrate studies (4). Meanwhile, marine ecologists and fisheries scientists continue to advocate for incorporating more ecosystem-based approaches to managing marine resources (10)(11)(12).…”

mentioning

confidence: 99%

Oil platforms off California are among the most productive marine fish habitats globally

Claisse

Pondella

Love

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

218

165

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Secondary (i.e., heterotrophic or animal) production is a main pathway of energy flow through an ecosystem as it makes energy available to consumers, including humans. Its estimation can play a valuable role in the examination of linkages between ecosystem functions and services. We found that oil and gas platforms off the coast of California have the highest secondary fish production per unit area of seafloor of any marine habitat that has been studied, about an order of magnitude higher than fish communities from other marine ecosystems. Most previous estimates have come from estuarine environments, generally regarded as one of the most productive ecosystems globally. High rates of fish production on these platforms ultimately result from high levels of recruitment and the subsequent growth of primarily rockfish (genus Sebastes) larvae and pelagic juveniles to the substantial amount of complex hardscape habitat created by the platform structure distributed throughout the water column. The platforms have a high ratio of structural surface area to seafloor surface area, resulting in large amounts of habitat for juvenile and adult demersal fishes over a relatively small footprint of seafloor. Understanding the biological implications of these structures will inform policy related to the decommissioning of existing (e.g., oil and gas platforms) and implementation of emerging (e.g., wind, marine hydrokinetic) energy technologies.secondary production | ecosystem-based management | ecosystem services | energy technology | Sebastes

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“…Interestingly, shredder abundance per leaf pack did not show a significant relationship with leaf breakdown rate, which implies the importance of measuring biomass as an indicator of shredder activity. Biomass, as a variable directly associated with secondary production, can potentially better illustrate the role of organisms in processes because secondary production integrates, among other factors, resource consumption and growth rate (Benke, 2010;Benke and Huryn, 2010).…”

Section: Shredders Accumulated Leaves and Breakdown Ratesmentioning

confidence: 99%

Relationships of shredders, leaf processing and organic matter along a canopy cover gradient in tropical streams

2017

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Terrestrial allochthonous organic matter represents a structuring element and an important source of energy and carbon to fauna in small forested streams. However, the role of this matter as a food resource for benthic macroinvertebrates, and consequently, for shredders and their performance in riverine processes, is not clear in low-order tropical streams. Aiming to investigate the relationship between shredders and leaves, we analyzed along a gradient of 8-93% canopy cover biomass and abundance of shredders, accumulated 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 rates are related to canopy cover and exhibit higher values in shaded sites; ii) shredder biomass is positively related to accumulated leaves and breakdown rates; and iii) due to the relatively large body size of the important shredders, the association of shredders with leaves and importance to leaf processing should be better expressed in terms of guild biomass than abundance. Shredder biomass varied between 846 and 1506 mg dry mass (DM) m -2 and accumulated leaves varied between 479 and 1120 g ash free dry mass (AFDM) m -2 across sites. Leaf breakdown rate (k), the only measured variable that varied significantly among sites, varied between -0.0015 and -0.0238 day -1 . Neither shredder biomass nor leaf biomass were associated with the shading gradient. On the other hand, shredder abundance and biomass, mainly represented by Triplectides (Trichoptera, Leptoceridae), was positively related to accumulated leaves within sites and to breakdown rates assessed by leaf packs. Leaf breakdown, as assessed by the experimental leaf packs, was associated with shredder biomass, but not with shredder abundance. This result suggests that macroinvertebrates are important for leaf detritus processing and that their biomass reflects their activity, presumably because it is related to their secondary production and perhaps non-consumptive action. Their activity was observed at the scale of leaf packs and not at the scale of variation in canopy cover because apparently canopy did not modulate availability of leaves, which were apparently not limiting to the shredders.

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Secondary production as part of bioenergetic theory—contributions from freshwater benthic science

Cited by 46 publications

References 46 publications

Environmental effects and urban impacts on aquatic macroinvertebrates in a stream of central Brazilian Cerrado

Environmental effects and urban impacts on aquatic macroinvertebrates in a stream of central Brazilian Cerrado

Oil platforms off California are among the most productive marine fish habitats globally

Relationships of shredders, leaf processing and organic matter along a canopy cover gradient in tropical streams

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