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Spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central Chile RChHN
BERRÍOS,PATRICIA A; FARÍAS,ARIEL A; OJEDA,F. PATRICIO.
Species resource use can vary throughout ontogeny, potentially affecting community dynamics. This can be particularly important for species facing high variability in environmental conditions and going through several orders of magnitude in size, as intertidal fishes. However, the influence of the resulting ontogenetic changes in guild membership on the spatio-temporal structure of fish assemblages remains virtually unknown. Here we assessed the spatial and temporal variability in the ontogenetic feeding guild (OFG) structure of the fish assemblage inhabiting the temperate rocky intertidal zone along central Chilean coast. This was done applying principal component analysis (PCA) and randomization tests (R-test) on the relative OFG composition of fish...
Tipo: Journal article Palavras-chave: Intertidal fishes; Ontogenetic feeding guilds; Spatio-temporal variability.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000400008
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Sampling grids for monitoring Euschistus heros infestation in soybean Bragantia
Pias,Osmar Henrique de Castro; Cherubin,Maurício Roberto; Berghetti,Juliano; Kuss,Cassiano Carlos; Santi,Antônio Luis; Basso,Claudir José.
ABSTRACT Euschistus heros is one the most important pest insect in soybean fields in Brazil. Therefore, site-specific management applied for controlling E. heros can result in economic and environmental benefits. However, sampling protocols for assessing spatialtemporal variability of this soybean pest and, then, for guiding a more sustainable pest management, were still unknown. Thus, the objective of this study was to compare the efficiency of sampling grid sizes for monitoring the spatial variability of E. heros infestation along the soybean reproductive stages. Nine sampling campaigns were carried out using the beating sheet method, from R2 to R7 soybean phenological stages. It was used a sampling grid of 10 × 10 m, totaling 338 points in an soybean...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neotropical brown stink bug; Pest sampling protocol; Spatio-temporal variability; Precision agriculture.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000300386
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