Effects of low pH and humus on the survivorship, growth and feeding of <i>Gammarus pulex</i> (L.) (Amphipoda)

Hargeby, Anders; Petersen, Robert C.

doi:10.1111/j.1365-2427.1988.tb00345.x

Cited by 55 publications

(33 citation statements)

References 43 publications

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“…at a given pH higher proportions of acid sensitive taxa were found for humic lakes than for clear-water lakes. This supports the hypothesis that humus buffers macroinvertebrates against the detrimental effects of low pH (Hageby and Petersen 1988;Gensemer and Playle 1999). Dangles et al (2004) showed that anthropogenic acidification has more severe effects than natural acidity on macroinvertebrate communities and processes in rivers.…”

Section: Discussionsupporting

confidence: 74%

Macroinvertebrate indicators of lake acidification: analysis of monitoring data from UK, Norway and Sweden

et al. 2008

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Although the acid sensitivity of many invertebrate species in lakes is well known, methods for assessment of lake acidification based on macroinvertebrate samples are less developed than for rivers. This article analyses a number of existing metrics developed for assessment of river acidification, and evaluates their performance for assessment of lake acidification. Moreover, new species-based indicators of lake acidification were developed and tested. The selected dataset contains 668 samples on littoral macroinvertebrates from 427 lakes with almost 60% of the samples from Sweden and the rest from UK and Norway. Flexible, non-parametric regression models were used for explorative analyses of the pressureresponse relationships. The metrics have been assessed according to their response to pH, the degree of nonlinearity of the response and the influence of humic compounds. Acid-sensitive metrics often showed a threshold in response to pH between 5.8 and 6.5. Highly acid-tolerant metrics were typically dominant across the whole pH range. Humic level had a positive effect for most acid-sensitive metrics. Generally, most metrics showed a more non-linear response pattern for the humic lakes than for clear lakes. The significant relationship between these macroinvertebrate metrics and acidification shows that there is a potential for developing further the assessment systems for ecological quality of lakes based on these metrics, although the metrics explained a low % of the variation (\30%). In order to improve the predictive power of the biotic metrics across the acidified part of Europe, further harmonization and standardisation of sampling effort and taxa identification are needed.

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Section: Discussionsupporting

confidence: 74%

Macroinvertebrate indicators of lake acidification: analysis of monitoring data from UK, Norway and Sweden

et al. 2008

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“…This supports the hypothesis that humus buffers macroinvertebrates against the detrimental effects of acidity (Hageby and Petersen 1988;Gensemer and Playle 1999). However, in our study we are not able to separate the anthropogenic contribution to low pH values from the contribution by natural acidity in humic lakes.…”

Section: Macroinvertebrate Indicators and Responses To Acidificationcontrasting

confidence: 31%

Ecological threshold responses in European lakes and their applicability for the Water Framework Directive (WFD) implementation: synthesis of lakes results from the REBECCA project

et al. 2008

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The objective of this synthesis is to present the key messages and draw the main conclusions from the work on lakes in the REBECCA project, pointing out their links to theoretical ecology and their applicability for the WFD implementation. Type-specific results were obtained from analyses of large pan-European datasets for phytoplankton, macrophytes, macroinvertebrates and fish, and indicators and relationships showing the impact of eutrophication or acidification on these biological elements were constructed. The thresholds identified in many of the response curves are well suited for setting ecological status class boundaries and can be applied in the intercalibration of classification systems. Good indicators for phytoplankton (chrysophytes, cyanobacteria) and macrophytes (isoetids and charaphytes) responses to eutrophication were identified, and the level of eutrophication pressure needed to reach the thresholds for these indicators was quantified. Several existing metrics developed for macrophytes had low comparability and need further harmonisation to be useful for intercalibration of classification systems. For macroinvertebrates, a number of metrics developed for rivers turned out to be less useful to describe lake responses to eutrophication and acidification, whereas other species based indicators were more

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“…macropterus, H. reticulatus, A. leptos, and P. obtusa). It is known that artificial acidification has depletory effects on fishes and aquatic invertebrates (Allan & Castillo, 2007) because several species are incapable to regulate internal pH, which in turn affects oxygen assimilation (Matthews, 1998), reproduction, and calcium and sodium regulation (Fromm, 1980;Freda & Dunson, 1984;Hargeby & Petersen Jr., 1988). Conversely, in natural acidic streams fish richness can be high (Henderson & Walker, 1986;Otto, 2006) because some species are adapted to these harsh conditions (Collier et al, 1990;Menezes et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Disentangling the influences of habitat structure and limnological predictors on stream fish communities of a coastal basin, southeastern Brazil

et al. 2014

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In stream environments habitat structure and limnological factors interact regulating patterns of energy and material transfer and affecting fish communities. In the coastal basins of Southeastern Brazil, limnological and structural characteristics differ between clear and blackwaters streams. The former have a diversity of substrate types, higher water velocities, and lower water conductivity, while the latter have sandy substrate, tea-colored and acidic waters, and low water velocities. In this study, we verified the relative importance of habitat structure and limnological variables in predicting patterns of variation in stream fish communities. Eight first to third order streams were sampled in the coastal plain of Itanhaém River basin. We captured 34 fish species and verified that community structure was influenced by physical habitat and limnology, being the former more important. A fraction of the variation could not be totally decomposed, and it was assigned to the joint influence of limnology and habitat structure. Some species that were restricted to blackwater streams, may have physiological and behavioral adaptations to deal with the lower pH levels. When we examined only the clearwater streams, all the explained variation in fish community composition was assigned to structural factors, which express specific preferences for different types of habitats.Em ambientes de riacho, fatores relacionados à estrutura dos habitats e limnologia interagem regulando os padrões de transferência de energia e matéria, afetando a composição da comunidade de peixes. Em bacias costeiras do sudeste do Brasil as características limnológicas e estrutura dos habitats diferem entre riachos de águas claras e pretas. Os primeiros são compostos por uma variedade de tipos de substrato, possuem velocidades de corrente mais elevadas e baixa condutividade, enquanto os últimos apresentam substrato arenoso, baixas velocidades de corrente e águas escuras e ácidas. Neste trabalho analisamos a importância relativa da estrutura dos habitats e das variáveis limnológicas como preditores dos padrões de composição em comunidades de peixes de riachos. Oito riachos de primeira a terceira ordem foram amostrados na planície costeira da bacia do rio Itanhaém. Capturamos 34 espécies e verificamos que a composição das comunidades foi influenciada por fatores estruturais e limnológicos, sendo os primeiros mais importantes. Uma fração de variação que não pode ser totalmente decomposta, devese à influência conjunta da limnologia e estrutura dos habitats. Algumas das espécies restritas aos riachos de águas pretas provavelmente apresentam adaptações fisiológicas e comportamentais para lidar com os baixos níveis de pH. Quando foram examinados somente os riachos de águas claras, toda a variação explicada na composição da comunidade de peixes foi atribuída aos fatores estruturais, devido a preferências específicas por diferentes características de hábitats.

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Effects of low pH and humus on the survivorship, growth and feeding of Gammarus pulex (L.) (Amphipoda)

Cited by 55 publications

References 43 publications

Macroinvertebrate indicators of lake acidification: analysis of monitoring data from UK, Norway and Sweden

Macroinvertebrate indicators of lake acidification: analysis of monitoring data from UK, Norway and Sweden

Ecological threshold responses in European lakes and their applicability for the Water Framework Directive (WFD) implementation: synthesis of lakes results from the REBECCA project

Disentangling the influences of habitat structure and limnological predictors on stream fish communities of a coastal basin, southeastern Brazil

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