Food Web Structure in a Subtropical Lake Ecosystem

Havens, Karl E.; Bull, Larry; Warren, G. L.; Crisman, Thomas L.; Phlips, E. J.; Smith, J. P.

doi:10.2307/3546317

Cited by 49 publications

(32 citation statements)

References 36 publications

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“…Thus, organic matter may be an important non-limited food resource with influence upon the insect communities of tropical and subtropical streams (this study ;Closs & Lake, 1994;Havens et al, 1996;Motta, 1996).…”

Section: Seasonal Variationmentioning

confidence: 97%

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Diet and trophic groups of an aquatic insect community in a tropical stream

Motta

Uieda

2004

Braz. J. Biol.

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The diet and trophic groups of an assemblage of aquatic insects were studied in a tropical stream. Genera of the orders Ephemeroptera, Odonata, Plecoptera, Lepidoptera, and Hemiptera showed feeding specialization. Others, such as Trichoptera, Coleoptera, and Diptera, showed great diet variation with genera of different trophic groups. Seasonal variation of insect diet, evident only for some genera of the orders Trichoptera, Lepidoptera, Coleoptera, and Diptera, was due to the differences observed in community composition and to generalist habits of these genera. However, the seasonal comparison of trophic groups showed no significant statistical differences. The great importance of organic matter, a non-limited resource, in the diet of Ribeirão do Atalho aquatic insects may be the explanation for the trophic stability in this community organization.Key words: aquatic insects, diet, trophic groups, tropical stream. RESUMO Dieta e grupos tróficos de uma comunidade de insetos aquáticos em um riacho tropicalA dieta e o grupo trófico de uma assembléia de insetos aquáticos foi estudada em um riacho tropical. Os gêneros de algumas ordens de insetos, como Lepidoptera, Ephemeroptera, Plecoptera, Odonata e Hemiptera, apresentaram especialização alimentar. Por outro lado, as ordens Trichoptera, Coleoptera e Diptera mostraram grande variação na dieta, com gêneros de diferentes grupos tróficos. Alguns gêneros das ordens Trichoptera, Lepidoptera, Coleoptera e Diptera apresentaram variação sazonal na dieta relacionada a mudanças na composição da comunidade e à dieta generalista desses gêneros. Entretanto, a comparação sazonal de grupos tróficos mostrou diferenças não significativas estatisticamente. A grande importância da matéria orgânica, um recurso não limitado, na dieta dos insetos aquáticos no Ribeirão do Atalho pode ser a explicação para a estabilidade da organização trófica dessa comunidade.Palavras-chave: insetos aquáticos, dieta, grupos tróficos, riacho tropical.

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Section: Seasonal Variationmentioning

confidence: 97%

“…At the laboratory, the macrophytes were washed and scraped in preservative. The macrofauna was separated from the remaining material by sugar flotation (Havens et al, 1996).…”

Section: Sampling and Analysesmentioning

confidence: 99%

Diet and trophic groups of an aquatic insect community in a tropical stream

Motta

Uieda

2004

Braz. J. Biol.

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“…Detritus originating from the macrophytes supports significant portion of small fish biomass. Plant detritus has also been shown to be an important energy source by Catella and Petrere (1996) in the fish community of a Brazil floodplain lake, by Havens et al (1996) in a subtropical lake ecosystem in USA, and by Liu (2006) in the zoobenthos community of Yangtze lakes.…”

Section: Current Status Of Small Fishes In Niushan Lakementioning

confidence: 99%

Community structure of small fishes in a shallow macrophytic lake (Niushan Lake) along the middle reach of the Yangtze River, China

Lek-Ang

et al. 2006

Aquat. Living Resour.

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-This study describes the current status of the small fish community in Niushan Lake in China, and examines the spatial and seasonal variations of the community in relation to key environmental factors. Based on macrophyte cover conditions, the lake was divided into three major habitat types: (1) Potamogeton maackianus habitat, (2) Potamogeton maackianus and Myriophyllum spicatum habitat, and (3) uncovered or less-covered habitat. Fish were sampled quantitatively in the three habitat types by block nets seasonally from September 2002 to August 2003. A total of 10 469 individuals from 27 fish species were caught, among which 20 species were considered as small fishes. Rhodeus ocellatus, Paracheilognathus imberbis, Pseudorasbora parva, Micropercops swinhonis and Cultrichthys erythropterus were recognized as dominant small fishes according to their abundance and occurrence. It was noted that (1) small fishes predominated the total number of fish species in the lake, which reflected to some degree the size diminution phenomenon of fish resources; (2) many small fishes had plant detritus as their food item, which was consistent with the abundance of macrophyte detritus in the lake and implied the importance of detritus in supporting small fish secondary production. Canonical correspondence analysis suggested that the spatial distributions of most small fishes were associated with complex macrophyte cover conditions. Macrophyte biomass was positively correlated with species richness, diversity index and the catch per unit of effort (CPUE) of the fish community. Water depth had no significant effects on species diversity and distribution of the small fishes. Correspondence analysis revealed a higher occurrence of the small fishes and higher abundance of individuals in summer and autumn. Seasonal length-frequency distributions of several species indicated that more larval and juvenile individuals appeared in spring and summer. This study provides some baseline information which will be essential to long-term monitoring of small fish communities in the Yangtze lakes.Key words: Small fishes / Freshwater community structure / Habitat utilization / Multivariate statistics / Lake fishery management / Yangtze lakes Résumé -Structure de la communauté des poissons de petites tailles du lac Niushan connecté au fleuve Yangtze (Chine). Ce travail décrit l'état actuel de la communauté des poissons du lac Niushan (Chine) en examinant la distribution spatiale et les variations saisonnières de la communauté en relation avec les principaux facteurs environnementaux du milieu. Les différentes espèces de macrophytes permettent de diviser les habitats du lac en 3 types : (1) habitat à Potamogeton maackianus, (2) habitat à Potamogeton maackianus et Myriophyllum spicatum, et (3) habitat sans ou peu de macrophyte. Les échantillonnages des poissons des trois types habitats ont été effectués à différentes saisons, de septembre 2002 à août 2003. Au total, 10 469 individus appartenant à 27 espèces de poissons ont été pêchés ; 20 espèces...

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“…Environmental effects in Lake Okeechobee must be carefully evaluated, owing to the complex nature of the ecosystem, both in terms of its distinct ecological zones (pelagic, benthic, nearshore, littoral) and the diverse array of biota that depend on these water resources (Havens et al 1996a). Submerged aquatic vegetation (SAV) is often a desirable component of shallow lakes and wetlands.…”

Section: Introductionmentioning

confidence: 99%

A long term calibration and verification of a submerged aquatic vegetation model for Lake Okeechobee

Jin

2013

Ecol Process

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Introduction: Submerged aquatic vegetation (SAV) has multiple functions in Lake Okeechobee. It provides critical habitat for fish and wildlife, stabilizes sediments, reduces phosphorus (P) concentration in the water column by preventing re-suspension of P-rich sediments, and provides a substrate for attached algae, which also helps to remove P from the water column. Ten year water quality and SAV growth simulations are presented and compared with observed SAV and water quality data collected in the nearshore zone in Lake Okeechobee. Methods: The SAV theory and approach used in the LOEM are modified from the Chesapeake Bay model and incorporate three state variables: shoots (above the bed sediment), roots (in the bed sediment), and epiphytes (attached to the shoots). The SAV model has direct linkages with the water quality model, including (1) a link between the growth and decay of SAV and the nutrient pool of the water quality model; (2) a link between the photosynthesis and respiration of SAV and dissolved oxygen dynamics, and (3) the ways in which settling of particulate organic matter and nutrient uptake affect nutrient levels in the water column and in the sediment bed. Results: Total suspended solids affect light attenuation and are another major driving factor for SAV growth in the nearshore and littoral zone area. The model performs reasonably well in reproducing the spatial distribution of SAV.

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Food Web Structure in a Subtropical Lake Ecosystem

Cited by 49 publications

References 36 publications

Diet and trophic groups of an aquatic insect community in a tropical stream

Diet and trophic groups of an aquatic insect community in a tropical stream

Community structure of small fishes in a shallow macrophytic lake (Niushan Lake) along the middle reach of the Yangtze River, China

A long term calibration and verification of a submerged aquatic vegetation model for Lake Okeechobee

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