Trophic cascade and biomanipulation: Interface of research and management‐A reply to the comment by DeMelo et al

Carpenter, Stephen R.; Kitchell, James F.

doi:10.4319/lo.1992.37.1.0208

Cited by 99 publications

(49 citation statements)

References 19 publications

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“…There has recently been much argument about the relative importance of determination of phytoplankton crops in lakes by zooplankton grazing (top-down control) or by availability of nutrients (bottom-up control) (DeMelo et al 1992;Carpenter and Kitchell 1992;Evans 1992). There is evidence of strong influence of piscivorous fish on zooplanktivorous fish and of the latter on zooplankton (Lafontaine and McQueen 199 1;McQueen et al 1992).…”

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Determination of phytoplankton crops by top‐down and bottom‐up mechanisms in a group of English lakes, the West Midland meres

Moss

McGowan

Carvalho

1994

Limnology & Oceanography

111

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Twenty-four lake basins formed in glacial drift ranged in maximum depth from 1.5 to 3 1 m and were characterized by generally low inorganic N concentrations and very high total P concentrations. The high P values were in some cases related to farm effluent pollution but in many others, despite annual mean values up to 1.46 mg liter-I, appear natural and due to the local mineralogy.For the entire group, there were no significant relationships between mean growth season chlorophyll a concentration and any measured chemical, morphometric, or zooplankton variable. When the group was divided on the basis of maximum depth and presence or absence of thermal stratification in summer into a shallow group (~3 m) and a deep group (>3 m), strong inverse correlation was obtained between chlorophyll a and cladoceran abundance in the shallow group and strong direct correlation with inorganic N in the deep group. Grazer control in the shallow group is probably linked with the dominance of submerged macrophytes and the refuges they provide for grazers. Some of the controversy presently surrounding the relative importance of top-down vs. bottom-up control of phytoplankton populations may thus be removed if consideration is given to the morphometry of the lakes.

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confidence: 99%

Determination of phytoplankton crops by top‐down and bottom‐up mechanisms in a group of English lakes, the West Midland meres

Moss

McGowan

Carvalho

1994

Limnology & Oceanography

111

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“…Nutrients, disturbance, competition, and predation all have been accepted as important forces affecting community composition within the context of these models. Within aquatic ecosystems, researchers have debated the relative roles of top-down consumer regulation and bottom-up resource control of communities and ecosystems (Carpenter and Kitchell 1992). Both are important structuring forces, with their relative effect depending on a host of factors, including the presence of omnivory (Diehl 1995), strength of interactions among species (Peacor and Werner 2001), and resource exchange between adjacent ecosystems (Polis et al 1996).…”

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confidence: 99%

Energetic Adaptations along a Broad Latitudinal Gradient: Implications for Widely Distributed Assemblages

Garvey¹,

DeVries²,

Wright³

et al. 2003

BioScience

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“…A biomanipulação é outra maneira, mais direta e drástica, de tentar restaurar ambientes aquáticos quanto à concentração de nutrientes. Como a dragagem, a biomanipulação também pode apresentar resultados diversos, desde total recuperação do lago até a volta de um estado de degradação após uma maior escala de tempo (Carpenter & Kitchell 1992, Meijer et al 1999. outro mecanismo de manipulação em ecossistemas aquáticos é a utilização de vegetais que absorvem nutrientes (Graneli & Solander 1988).…”

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O papel das Macrófitas aquáticas emersas no ciclo do fósforo em lagos rasos

2007

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resuMOo ciclo do fósforo é um dos ciclos biogeoquímicos que mais sofreu alterações nas últimas décadas devido a forte ação antrópica, sendo os efluentes domésticos os principais responsáveis neste processo. A discussão do papel das macrófitas emersas como mediadoras de um transporte líquido de fósforo do sedimento para a coluna d'água ('Bomba de fósforo') ou como um sumidouro deste elemento torna-se relevante para o entendimento do ciclo fósforo em ecossistemas aquáticos. O objetivo principal desta revisão é discutir os principais mecanismos responsáveis pela transferência de fósforo em macrófitas emersas e suas conseqüências para o ciclo do fósforo em lagos rasos. Palavras-chave: Macrófitas aquáticas emersas, fósforo, lagos rasos. ABSTRACTthe rOle Of eMergent aquatic MacrOPhytes in the PhOsPhOrus cycle Of shallOw lakes. the phosphorus cycle is one of the biogeochemical cycles that has been more altered in the last decades due to strong antropic activity, being domestic sewage the main responsible in this process. the discussion of the emergent macrophytes role as mediators of a net transport of phosphorus from sediment to the water column ('Phosphorus pump') or as net sinks of phosphorus becomes relevant for the phosphorus cycle understanding in aquatic ecosystems. the aim of this review is to discuss the main responsible mechanisms for phosphorus transference in emergent macrophytes and its consequences to the phosphorus cycle in shallow lakes. keywords: Emergent aquatic macrophytes, phosphorus, shallow lakes. cOnsiderações iniciaisos lagos constituem ecossistemas bem distribuídos na superfície terrestre (Downing et al. 2006), sendo reconhecidos como importantes ambientes de acumulação de matéria orgânica e inorgânica, devido a sua freqüente posição terminal na bacia de drenagem (Lennon 2004). A matéria inorgânica que limita a atividade biológica possui a denominação genérica de nutriente. Dessa forma, o escoamento superficial e subsuperficial, que resulta em um enriquecimento de nutrientes (eutrofização) nos lagos, é considerado pela literatura clássica um processo natural que influencia intensamente a biota e a própria sucessão ecológica (Lindeman 1942). no entanto, as atividades humanas também podem contribuir fortemente para a eutrofização dos lagos, trazendo resultados mais drásticos e em menor escala de tempo.

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Trophic cascade and biomanipulation: Interface of research and management‐A reply to the comment by DeMelo et al

Cited by 99 publications

References 19 publications

Determination of phytoplankton crops by top‐down and bottom‐up mechanisms in a group of English lakes, the West Midland meres

Determination of phytoplankton crops by top‐down and bottom‐up mechanisms in a group of English lakes, the West Midland meres

Energetic Adaptations along a Broad Latitudinal Gradient: Implications for Widely Distributed Assemblages

O papel das Macrófitas aquáticas emersas no ciclo do fósforo em lagos rasos

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