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James, Mark R.

doi:10.1023/a:1013178016080

Cited by 117 publications

(16 citation statements)

References 26 publications

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“…The importance of littoral zones of lakes as habitat for many species of invertebrates and vertebrates has been widely explored (see Weatherhead and James, 2001;Winfield, 2004). These zones provide heterogeneous areas with a varying degree of structural complexity forming a mosaic of different microhabitats (Chick and Mclvor, 1994).…”

Section: Discussionmentioning

confidence: 99%

Chironomidae feeding habits in different habitats from a Neotropical floodplain: exploring patterns in aquatic food webs

et al. 2016

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Ecological studies on food webs have considerably increased in recent decades, especially in aquatic communities. Because Chironomidae family are highly specious, occurring in almost all aquatic habitats is considered organisms-key to initiate studies on ecological relationships and trophic webs. We tested the hypothesis that the diversity of the morphospecies diet reflects differences on both the food items available among habitats and the preferences of larval feeding. We analyzed the gut content of the seven most abundant Chironomidae morphospecies of the different habitats from the Upper Paraná River. We categorized the food items found into algae, fungal spores, fragments of plants, algae and animal fragments and sponge spicules. We observed the algae predominance in the gut content of morphospecies from lakes. Considering the different regions from each lake, we registered the highest food abundance in the littoral regions in relation to the central regions. From the variety of feeding habits (number of item kinds), we classified Chironomus strenzkei, Tanytarsus sp.1, Procladius sp.1 as generalist morphospecies. We found a nested pattern between food items and Chironomidae morphospecies, where some items were common to all taxa (e.g., Bacillariophyceae algae, especially), while others were found in specific morphospecies (e.g., animals fragments found in Procladius sp.1). The algae represented the most percentage of gut contents of Chironomidae larvae. This was especially true for the individuals from littoral regions, which is probably due to the major densities of algae associated to macrophytes, which are abundant in these regions. Therefore, the feeding behavior of these morphospecies was generalist and not selective, depending only of the available resources.Keywords: lakes, food networks, aquatic invertebrate, food resources, Upper Paraná River. Hábitos alimentares de Chironomidae em diferentes habitats de uma planície de inundação Neotropical: explorando padrões em redes alimentares aquáticas ResumoEstudos sobre redes alimentares têm aumentado consideravelmente nas últimas décadas em pesquisas de ecologia, principalmente em comunidades aquáticas. Em função Família Chironomidae ser altamente especiosa, ocorrendo em quase todos os hábitats aquáticos, é considerada como organismos-chave para estudos preliminares sobre as relações ecológicas como redes tróficas. Nós testamos a hipótese de que a diversidade de dietas das morfoespécies reflete diferenças tanto na disponibilidade dos itens alimentares entre os hábitats analisados, quanto preferencias alimentares das larvas. Nós analisamos o conteúdo digestivo das sete morfoespécies mais abundantes de diferentes habitats da planície de inundação do alto rio Paraná. Nós categorizamos os itens alimentares encontrados como algas, esporos de fungos, fragmentos vegetais, fragmentos de algas ou de animais e espículas de esponjas. Nós observamos a predominância de algas no conteúdo digestivo das morfoespécies lacustres. Considerando as diferentes regiões d...

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Section: Discussionmentioning

confidence: 99%

Chironomidae feeding habits in different habitats from a Neotropical floodplain: exploring patterns in aquatic food webs

et al. 2016

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“…This emphasizes the macrophytes and riparian vegetation association as an important ecological role to macroinvertebrate's community. Weatherhead & James (2001) verified that depth, turbidity and flood peaks were not influent factors on the macroinvertebrate's abundance and distribution; however the suspended solids modified the macrophytes. Macrophytes are related to nutrients supply, even in oligotrophic lakes (Weathehead & James 2001), to egg deposition and refuge to these animals, besides to be an important factor to habitat heterogeneity (Jackson 1997, Higuti & Takeda 2002.…”

Section: Discussionmentioning

confidence: 79%

The invertebrate's community in adjacent Alto Iguaçu's anthropic lakes of different environmental factors

et al. 2013

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The invertebrate's community in adjacent Alto Iguaçu's anthropic lakes of different environmental factors. Biota Neotrop. 13(1): http://www.biotaneotropica.org.br/v12n4/en/abstract?article+bn00813012013Abstract: Environmental differences occur between lentic and lotic communities' establishment, especially because of water time residence. Here we used a combination of field measurements and statistical analysis to evaluate the influent factors on the aquatic macroinvertebrates' composition and structure in 15 anthropogenic lakes from Alto Iguaçu's region. Macroinvertebrates were sampled from the marginal vegetation (with or without macrophytes) and sediment. Chemical parameters ranged among the anthropogenic lakes, mainly those which are connected to the Iguaçu River, beyond the presence or absence of macrophytes, interfering on the community's structure. Lake's morphometric data were measured in each lake and its relation to community was tested. The community structure was not related to the margin development index (Ds), macrophytes and altitude. Higher equitability was associated to the macrophytes presence in more than 30% of water surface and also where the riparian vegetation was more complex. Chironomids and oligochaetes densities were associated to lakes with the water surface completely covered by macrophytes and complex riparian vegetation. We observed a close association between productivity (phosphorous and nitrogen) and the community equitability (R = 0.3; p < 0.05) and Oligochaeta dominance (R = 0.32; p < 0.05), and not to Ostracoda's (R = 0.33; p > 0.05) and Chironomidae's (R = 0.34; p > 0.05) dominances, although we had not weighty difference among analyzed biological indexes. Resumo: Diferenças ambientais ocorrem entre o estabelecimento de comunidades de ambientes lênticos e lóticos, especialmente por causa do tempo de residência da água. Foi usada uma combinação de métricas de campo e análise estatística para avaliar os fatores influentes sobre a composição e estrutura de macroinvertebrados aquáticos em 15 lagos antropogênicos da região do Alto Iguaçu. Os macroinvertebrados foram amostrados da vegetação marginal (com ou sem macrófitas) e sedimento. Parâmetros químicos variaram entre os lagos antrópicos, principalmente aqueles conectados ao Rio Iguaçu, além da presença ou ausência das macrófitas, interferindo na estrutura da comunidade. Dados de morfometria de lagos foram mensurados e sua relação com a comunidade foi testada. A estrutura da comunidade não foi relacionada ao índice de desenvolvimento da margem (Ds), macrófitas e altitude. Maior equitabilidade foi associada à presença de macrófitas em mais de 30% da superfície da água e também onde a vegetação ripária foi mais complexa. Densidades de quironomídeos e oligoquetas foram associadas a lagos com a superfície completamente coberta por macrófitas e complexa vegetação ripária. Foi observada associação entre a produtividade (fósforo e nitrogênio) e a equitabilidade da comunidade (R = 0.3; p < 0.05) e dominância de Oligochaeta (R = 0.32; p ...

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“…El número de especies en ambas estaciones de la zona profunda del lago El Sol fue similar, ya que éstas presentaron condiciones ambientales similares tanto en el agua como en el sedimento. No obstante, lo encontrado en la zona somera es contradictorio con lo que se ha reportado en otros estudios de lagos de alta montaña, donde existe un número mayor de especies en la zona con vegetación debido a que ésta presenta una gran cantidad de microhábitats y sirve como zona de alimentación y refugio contra la depredación y el arrastre por el oleaje y las corrientes (Barbieri et al, 2001;Weatherhead & James, 2001). La semejanza entre ambas estaciones litorales se puede atribuir principalmente a que en la zona desnuda tal vez no existe una fuerte presión de depredación por parte de vertebrados e invertebrados acuáticos, así como a que esta zona, que presenta forma de gancho, está protegida enero); en el resto del año no se observó patrón alguno.…”

Section: Discussionunclassified

Benthic macroinvertebrates of two tropical, high-mountain lakes at Nevado de Toluca Volcano at central region of Mexico

2016

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2016. Macroinvertebrados bentónicos de dos lagos tropicales de alta montaña en el volcán Nevado de Toluca, en la región central de México. Hidrobiológica 26 (3): 419-432. RESUMENAntecedentes. Los macroinvertebrados bentónicos son importantes debido a su papel en la remineralización de la materia orgánica y como indicadores por ser sensibles a las perturbaciones derivadas de las actividades humanas. Objetivos. Analizar la distribución espacial y temporal de la riqueza taxonómica y la densidad de los macroinvertebrados bentónicos y su relación con algunas las variables ambientales en dos lagos tropicales de alta montaña localizados en el volcán Nevado de Toluca, en el centro de México. Métodos. Se seleccionaron dos estaciones profundas y dos someras (con y sin vegetación) para el lago de El Sol y una estación profunda para La Luna. Resultados. En El Sol se identificaron cuatro especies de oligoquetos (Limnodrilus hoffmeisteri, Tubifex tubifex, Lumbriculus variegatus y Nais pardalis), un bivalvo (Pisidium casertanum), un hidrozoario (Hydra vulgaris) y dos quironómidos (Pagastia sp. y Tanytarsus sp.). En La Luna solo se encontró a L. hoffmeisteri y Pagastia sp. Las densidades promedio de los macroinvertebrados bentónicos en la zona profunda de ambos lagos fueron similares (El Sol 5,526 ± 3,807 org m -2 y La Luna 7,955 ± 7,349 org m -2 ). La densidad en la zona somera sin vegetación en El Sol fue de 38,249 ± 33,077 org m -2 , mientras que en la estación con vegetación la densidad fue de 25,247 ± 18,997 org m -2 . Conclusiones. La variación temporal de la densidad de los macroinvertebrados parece estar regulada por la temperatura y el pH, presentándose los menores valores cuando la temperatura y el pH son más bajos.Palabras clave: Bentos, Estado de México, lagos alpinos, lagos oligotróficos, Nevado de Toluca. ABSTRACTBackground. The benthic macroinvertebrates play an important role in the organic matter recycling and are sensitive indicators of human perturbation. Goals. The aim of this study was to recognize the spatial and temporal variation in taxonomic richness and density of the benthic macroinvertebrates of high mountain Lakes El Sol and La Luna, and their relationship with the environmental variables. Methods. Three deep stations (El Sol = 2 and La Luna = 1) and two in the littoral zone of El Sol (with and without vegetation) were selected. Results. We found eight taxa in El Sol: four oligochaetes (Limnodrilus hoffmeisteri, Tubifex tubifex, Lumbriculus variegatus and Nais pardalis), one bivalve (Pisidium casertanum), one hydrozoan (Hydra vulgaris) and two chironomids (Pagastia sp. and Tanytarsus sp.). Differently in La Luna there were just L. hoffmeisteri y Pagastia sp. The average density of the benthic macroinvertebrates was similar in the deep zone of both lakes (El Sol 5,526 ± 3,807 org m -2 y La Luna 7,955 ± 7,349 org m -2 ). The density in the shallow zone without vegetation was higher (38,249 ± 33.077 org m -2 ) than in the vegetated shallow zone (25.247 ± 18.997 org m -2 ). Conclusions. The temporal vari...

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Cited by 117 publications

References 26 publications

Chironomidae feeding habits in different habitats from a Neotropical floodplain: exploring patterns in aquatic food webs

Chironomidae feeding habits in different habitats from a Neotropical floodplain: exploring patterns in aquatic food webs

The invertebrate's community in adjacent Alto Iguaçu's anthropic lakes of different environmental factors

Benthic macroinvertebrates of two tropical, high-mountain lakes at Nevado de Toluca Volcano at central region of Mexico

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