Persistence of Stream Invertebrate Communities in Relation to Environmental Variability

Townsend, Colin R.; Hildrew, Alan G.; Schofield, Kay

doi:10.2307/5071

Cited by 114 publications

(100 citation statements)

References 21 publications

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“…Persistence and stability of the 3 most abundant taxa were consistently high across the entire community, suggesting a temporally persistent pool of common taxa in Azorean streams, similar to other studies in continental streams (Townsend et al, 1987;Winterbourn, 1997). However, further research is required to understand the strategies employed by these core chironomid taxa.…”

Section: Temporal Variabilitysupporting

confidence: 75%

Environmental factors – spatial and temporal variation of chironomid communities in oceanic island streams (Azores archipelago)

Raposeiro

Costa

Hughes

2011

Ann. Limnol. - Int. J. Lim.

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-Freshwater systems on volcanic oceanic islands have very particular characteristics as a result of their geological origins, relatively small size, distances from source areas for colonizers, and distinct catchment morphology. These factors result in freshwater communities that are clearly distinct from continental systems. Chironomid spatial and temporal distribution was investigated in chironomid assemblages at 21 sites across the Azores Archipelago. Results using PERMANOVA, a permutational multivariate analysis of variance, indicated significant longitudinal differences in assemblages but none between islands or over time.Links between hydromorphological and physicochemical variables and the community assemblage were assessed using DISTLM, a linear model for distance-based multivariate analysis. The percentage of variation explained by hydromorphological factors (31%) was slightly higher than that explained by physicochemical (28%) factors. Descriptors of land use (forest area, scrub area, natural area of catchment) and stream slope were found to be the best environmental predictors of chironomid assemblages in Azores. Physicochemical variables such as temperature, pH, nitrite, iron and conductivity were the principal drivers of change in chironomid composition in stream locations. Headwater sites, characterized by lower temperature, acid to neutral pH values, low conductivity, nutrient and metal concentrations were dominated by Rheocricotopus atripes. Mid-section sites, located in agricultural areas were dominated by Thienemanniella clavicornis. Urbanized lower reaches were characterized by higher temperature, pH, conductivity and nutrient levels and were dominated by Cricotopus sp. These results give essential information that allows us to predict the response of different chironomid species to hydromorphological and physicochemical gradients across the archipelago's streams contributing providing the basis for the development of tools for the implementation of the Water Frame Directive.

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Section: Temporal Variabilitysupporting

confidence: 75%

Environmental factors – spatial and temporal variation of chironomid communities in oceanic island streams (Azores archipelago)

Raposeiro

Costa

Hughes

2011

Ann. Limnol. - Int. J. Lim.

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“…Other studies have reported high variability in macroinvertebrate and fish communities under relatively constant environmental conditions (Moyle and Vondracek, 1985;Townsend et al, 1987;Weatherley and Ormerod, 1990;Scarsbrook, 2002;Milner et al, 2006). Our results suggest that variability in environmental factors was not detected due to characteristics of the water body.…”

Section: Discussioncontrasting

confidence: 43%

Effect of daily variation on the seasonality of testate amoebae community structure in different environments of a Neotropical floodplain

et al. 2015

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“…Sixteen streams were sampled in this study, and pH was recorded in 1976 and 1994, and an average value was calculated for each stream. Five randomly dispersed Surber samples (sample-unit area 0.0625 m 2 ; mesh aperture 330 mm) were collected from each of the 16 streams in October 1976, 1984and 1994(Gjerlv et al, 2003Townsend et al, 1987) (total n sampleunits ¼ 240). The benthos was disturbed to a depth of approximately 5 cm and all macroinvertebrates collected were preserved in the field and subsequently sorted.…”

Section: Appendixmentioning

confidence: 99%

Biodiversity, Species Interactions and Ecological Networks in a Fragmented World

Hagen

Kissling

Rasmussen

et al. 2012

Advances in Ecological Research

336

339

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Persistence of Stream Invertebrate Communities in Relation to Environmental Variability

Cited by 114 publications

References 21 publications

Environmental factors – spatial and temporal variation of chironomid communities in oceanic island streams (Azores archipelago)

Environmental factors – spatial and temporal variation of chironomid communities in oceanic island streams (Azores archipelago)

Effect of daily variation on the seasonality of testate amoebae community structure in different environments of a Neotropical floodplain

Biodiversity, Species Interactions and Ecological Networks in a Fragmented World

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