Consulta: creatorFacets:"VALENTIN,JEAN L."
Registros recuperados: 2
Data/hora: 10/06/2024 11:26:25

Evaluation of the complexity and performance of marine planktonic trophic models
Provedor de dados: 42
Autores: LELES,SUZANA G.; VALENTIN,JEAN L.; FIGUEIREDO,GISELA M.
ABSTRACT Planktonic models represent a powerful tool for creating hypotheses and making predictions about the functioning of marine ecosystems. Their complexity varies according to the number of state variables and the choice of functional forms. We evaluated plankton models during the last 15 years (n =145) with the aims of understanding why they differ in complexity, evaluating model robustness, and describing studies of plankton modelling around the globe. We classified models into four groups: Nutrient-Phytoplankton-Zooplankton (NPZ), Nutrient-Phytoplankton-Zooplankton-Detritus (NPZD), Size-Structured (SS) and Plankton-Functional-Type (PFT). Our results revealed that the number of state variables varied according to the question being addressed: NPZ...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecological modelling; Marine plankton; Model complexity; Trophodynamics.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000501971

Do the changes in temperature and light affect the functional response of the benthic mud snail Heleobia australis (Mollusca: Gastropoda)?
Provedor de dados: 42
Autores: MAGALHÃES,THAISA R.F.; NEVES,RAQUEL A.F.; VALENTIN,JEAN L.; FIGUEIREDO,GISELA M.
The aim of this study was to determine the influence of temperature increase combined to conditions of light incidence on functional response of Heleobia australis. Experiments were conducted using nine to ten food concentrations for each treatment: 20°C without light; 30°C without light and, 30°C under low light intensity. For each experiment, the functional response type III (sigmoidal) was fitted and equation parameters were determined. Results suggest that, if the sediment temperature increases, H. australis will not have its ingestion rates affected negatively, whilst its feeding behavior seems to be negatively affected by light. Ingestion rates estimated for organic content in the Guanabara Bay were: 0.34 µgC ind–1h–1 at 20°C without light, 1.44 µgC...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydrobiid; Ingestion rates; Estuarine system; Gastropod.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301197