Eutrophication and ecological rehabilitation of dutch lakes: Presentation of a new conceptual framework

doi:10.1016/0273-1223(95)00372-t

Cited by 21 publications

References 27 publications

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Laboratory assay of sediment phytotoxicity using the macrophyte Vallisneria americana

Biernacki

Lovett‐Doust

1997

Enviro Toxic and Chemistry

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In contrast to their ecological importance, submersed rooted macrophytes have been overlooked in environmental science. Presently, the array of standard phytotoxic bioassays includes only one free‐floating vascular macrophyte (Lemna) and several algal species. A short‐term and inexpensive assay was studied for feasibility in evaluating sediment quality. Cloned ramets of the macrophyte Vallisneria americana were used to test phytotoxicity of sediments collected at different locations in the Detroit River. Ramets were planted in sediment samples and placed in greenhouse aquaria. After a week of exposure, ramets of V. americana were destructively sampled and preserved. The leaf and root surfaces areas were determined, and plant biomass was recorded for each ramet. An index of the leaf‐to‐root surface area ratio was a reliable predictor of sediment phytotoxicity; the ratio of leaf‐to‐root mass was also useful but proved less consistent. Ramets grown in sediments that were relatively less contaminated with organic compounds had lower values of the leaf‐to‐root surface area ratio, while plants grown in more contaminated sediments had greater values. Results of analyses of variance indicated that the index of leaf‐to‐root surface area ratio responded to sediment quality but was not significantly affected by either variation in plant genotype or interaction between sediment and plant genotype. There was a significant correlation (p < 0.001) between rank‐ordered results of the present greenhouse study and results of leaf‐to‐root surface area ratios for plants previously surveyed in the field.

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Laboratory assay of sediment phytotoxicity using the macrophyte Vallisneria americana

Biernacki

Lovett‐Doust

1997

Enviro Toxic and Chemistry

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Assessing the trophic state of Linhos lake: a first step towards ecological rehabilitation

Pereira

Soares

Ribeiro

et al. 2002

Journal of Environmental Management

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Lack of recognition of the value of wetlands has led to the loss of considerable areas of these ecosystems in the past.Linhos lake (Figueira da Foz, Portugal) is a good example of one of these ecosystems, in which human intervention was responsible for its environmental degradation and led to its precocious terrestrialization. Physico-chemical conditions and zooplankton community structure were studied in Linhos lake, in order to evaluate ecosystem functioning and to acquire baseline information. The system is characterised by high oxygen depletion. Spatial heterogeneity was confirmed by the existence of significant differences in total densities for the three zooplanktonic groups. Rotifers were the most abundant group attaining their maximum density in April (2251Ð1 ind/l). Keratella quadrata, K. cochlearis, Polyarthra vulgaris, Filinia terminalis and Hexarthra mira were the main abundant species. Correspondence analysis suggested temperature as the main controlling factor in species seasonality. In order to prevent the precocious disappearance of the lake some restoration measures were proposed based on zooplankton community structure.

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The art and science of lake restoration

Moss

Developments in Hydrobiology

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Eutrophication and ecological rehabilitation of dutch lakes: Presentation of a new conceptual framework

Cited by 21 publications

References 27 publications

Laboratory assay of sediment phytotoxicity using the macrophyte Vallisneria americana

Laboratory assay of sediment phytotoxicity using the macrophyte Vallisneria americana

Assessing the trophic state of Linhos lake: a first step towards ecological rehabilitation

The art and science of lake restoration

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