Tolerance Values of Stream Caddisflies (Trichoptera) in the Lower Colorado River Basin, Usa

Blinn, Dean W.; Ruiter, David E.

doi:10.1894/0038-4909(2006)51[326:tvosct]2.0.co;2

Cited by 31 publications

(32 citation statements)

References 6 publications

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“…For example, some studies have shown that limnic macroinvertebrate species have considerable physiological capacities to tolerate saline conditions Chadwick and Feminella, 2001;Chadwick et al, 2002;Kefford et al, 2007), particularly aquatic insects, which have traditionally been viewed as the most sensitive to increases in salinity, but most frequently overlooked in estuaries (Williams, 2009). Several of these taxa have been shown to function normally in brackish estuarine environments (Blinn and Ruiter, 2006;Müller, 1980;Williams, 2009;Williams and Hamm, 2002;Williams and Williams, 1998a). As such, the response of these fauna may be more complex and occur over longer time periods than is currently assumed, particularly as the physiological mechanisms that allow species and populations to survive saltwater incursion (and other climate stressors, such as temperature, which may act synergistically) are still not fully understood and neither are the time-scales on which different physiological and evolutionary mechanisms could operate (Tills et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Quantifying salinity-induced changes on estuarine benthic fauna: The potential implications of climate change

Little

Wood

Elliott

2017

Estuarine, Coastal and Shelf Science

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Coastal and estuarine systems worldwide are under threat from global climate change, with potential consequences including an increase in salinities and incursion of saltwater into areas currently subject to tidal and non-tidal freshwater regimes. It is commonly assumed that climate-driven increases in estuarine salinities and saline incursion will be directly reflected in an upstream shift in species distributions and patterns of community composition based on salinity tolerance. This study examined the responses of benthos to medium-term salinity changes in two macrotidal river-estuary systems in SE England to test whether these responses may be representative of climate-induced salinity changes over the long-term. The study reinforced the effect of salinity, related to tidal incursion, as the primary environmental driver of benthic species distribution and community composition. Salinity, however, acted within a hierarchy of factors followed by substratum type, with biotic competition and predatorprey relationships superimposed on these. The assumption that increasing salinities will be directly reflected in a shift in species distributions and patterns of community composition upstream over the long-term was shown to be over simplistic and not representative of a complex and highly variable system. Relative Sea Level Rise (RSLR) projections were predicted to increase estuarine salinities and 2 saline incursion in the study estuaries, which together with projected reductions in river flow will have important consequences for estuarine structure and function, particularly in tidal limnetic zones, despite estuarine communities being pre-adapted to cope with fluctuating salinities. The study identified, however, that limnic-derived fauna inhabiting these zones may demonstrate greater tolerance to salinity change than is currently recognised, and may persist where salinity increases are gradual and zones unbounded.

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Section: Discussionmentioning

confidence: 99%

Quantifying salinity-induced changes on estuarine benthic fauna: The potential implications of climate change

Little

Wood

Elliott

2017

Estuarine, Coastal and Shelf Science

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“…At 72 h, LC 50 values generated for Isonychia were lower than those for fathead minnows and Argia, and after 96 h Isonychia had the lowest LC 50 value at 3.10 g NaCl per liter, half the reported value for H. azteca and a third of the LC 50 value reported for Hydropsyche sp. Organisms in the family Hydropsychidae, particularly Hydropsyche sp., have been reported to have a high tolerance to salinity (Williams and Williams 1998;Blinn and Ruiter 2006;Kennedy et al 2003).…”

Section: Amphipoda: Hyalellidaementioning

confidence: 99%

Preliminary results of laboratory toxicity tests with the mayfly, Isonychia bicolor (Ephemeroptera: Isonychiidae) for development as a standard test organism for evaluating streams in the Appalachian coalfields of Virginia and West Virginia

Echols

Currie

Cherry

2009

Environ Monit Assess

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Selecting the most appropriate test species for sediment and water column assays has been a primary goal for ecotoxicologists. Standard test organisms and established test guidelines exist, but the USEPA-recommended species may not be the most sensitive organisms to anthropogenic inputs. This paper describes preliminary results of toxicity tests with the mayfly, Isonychia bicolor (Ephemeroptera). Results suggested that Isonychia were moderately sensitive to NaCl after 96 h with an average LC(50) value of 3.10 g NaCl per liter. This value decreased after 7 days of exposure, resulting in a mean LC(50) value of 1.73 g NaCl per liter. When exposed to a coal-mine-processed effluent, Isonychia generated LC(50) values that ranged from 13% to 39% effluent. I. bicolor were more sensitive to the coal processing effluent than Ceriodaphnia dubia with conductivity lowest observable effects concentration (LOEC) values for mayfly survivorship that ranged from 1,508 to 4,101 microS/cm, while LOEC values for C. dubia reproduction ranged from 2,132 to 4,240 microS/cm.

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“…For example, Hydroptila and Hirudinea both prefer a higher embedded substrate (Mann, 1961;Blinn and Ruiter, 2006), which is more characteristic of Compensation Creek than of the reference stream. The flow from RR pond was the source of copepods into Compensation Creek, and may also have been the source of Polycentropus.…”

Section: Discussionmentioning

confidence: 99%

Invertebrate communities in Compensation Creek, a man‐made stream in boreal Newfoundland: The influence of large woody debris

Gabriel

Clarke

Campbell

2009

River Research & Apps

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Benthic invertebrate communities were examined in Compensation Creek, a man-made stream in south-central Newfoundland, Canada. Samples taken in September 2006 and September 2007 from large woody debris (LWD) were compared with samples from benthic environments to determine whether LWD supported a more diverse and abundant invertebrate community. Benthic habitats in a nearby natural stream were also sampled. Taxa composition was similar between the man-made and the natural stream, highlighting successful colonization for the majority of taxa. Within Compensation Creek, taxa richness was higher in benthic habitats than on LWD, likely influenced by the successional age of the stream and surrounding habitat. The more complex benthic substrate provided refugia and allowed for the accumulation of fine detritus as a food source. Scrapers were almost completely absent from LWD and collector-gatherer abundance was greater in the benthos. Collector-filterer abundance was more than six times greater near the pond outflow than farther downstream when discharge was high, but abundances were almost equal when discharge was reduced. Riparian vegetation has not fully established around the man-made stream, whereas it is overhanging and extensive at the natural stream, leading to more leaf-litter input for shredders. As the morphology of Compensation Creek changes, the invertebrate community will continue to develop and likely increase utilization of accumulated detritus at LWD.

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Tolerance Values of Stream Caddisflies (Trichoptera) in the Lower Colorado River Basin, Usa

Cited by 31 publications

References 6 publications

Quantifying salinity-induced changes on estuarine benthic fauna: The potential implications of climate change

Quantifying salinity-induced changes on estuarine benthic fauna: The potential implications of climate change

Preliminary results of laboratory toxicity tests with the mayfly, Isonychia bicolor (Ephemeroptera: Isonychiidae) for development as a standard test organism for evaluating streams in the Appalachian coalfields of Virginia and West Virginia

Invertebrate communities in Compensation Creek, a man‐made stream in boreal Newfoundland: The influence of large woody debris

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