A Discussion of the Importance of the Screen Size in Washing Quantitative Marine Bottom Samples

Reish, Donald J.

doi:10.2307/1930047

Cited by 77 publications

(45 citation statements)

References 6 publications

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“…Once sediment samples were collected, there can also be inconsistencies in processing, usually in which mesh size is used to separate organisms from sediment. This is a well-known problem in benthic ecological studies (Reish, 1959), but there is no obvious way to correct for it. Here, the older data (1969À74) were based on mesh sizes of 1.0 mm or 1.5 mm, whereas the newer data are based on a 0.5-mm mesh.…”

Section: Discussionmentioning

confidence: 99%

Benthic Invertebrate Community Composition and Sediment Properties in Barnegat Bay, New Jersey, 1965−2014

Taghon

Ramey

Fuller

et al. 2017

Journal of Coastal Research

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Section: Discussionmentioning

confidence: 99%

Benthic Invertebrate Community Composition and Sediment Properties in Barnegat Bay, New Jersey, 1965−2014

Taghon

Ramey

Fuller

et al. 2017

Journal of Coastal Research

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“…It is notable that so many species contributed to the opportunist peaks and that Capitella and Heteromastus were not predominant, as is generally the case (e.g., Dean & Haskin 1964;Swarlz et al 1985;Leppiikoski 1975). Capitellid numbers were probably underestimated by sieving through a 1.00 mm mesh (Reish 1959). Nevertheless, some of the common species contributing to these peaks (Gisborne species Group 3, and Hastings species Groups 1 and 2) belonged to genera often regarded as "transitionary": for example, Chaetozone, Goniada, Paraprionospio, Pectinaria, and Prionospio have been described as secondary colonists, characterised by their appearance after the initial colonists, such as Capitella, in the successional trajectory (Grassle & Grassle 1974;Pearson 1975;Pearson & Rosenberg 1976;Rosenberg 1976).…”

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Benthos associated with two New Zealand coastal outfalls

Roper¹,

Smith²,

Read³

1989

New Zealand Journal of Marine and Freshwater Research

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The benthic ecological impacts of 2 New Zealand ocean outfalls were studied. They are the country's largest (discharging 0.8 m 3 s -1) at Hastings, and longest-established (operating since 1965 and with a present discharge of 0.28 m 3 s -1 ) at Gisbome. Both discharge essentially biodegradable domestic and food-processing-industry wastes. Samples were collected about each outfall and analysed for particle size, oil and grease, readily oxidisable carbon (ROC), total Kjeldahl nitrogen (TKN), volatile solids, and macrofauna. Changes in the sediments indicated that the effluents contained inorganic paniculate material in the mud/very fine sand size range. Peaks in concentrations of oil and grease, ROC, TKN, and volatile solids occurred at the diffusers. Numbers of taxa were low near the outfalls, but increased with distance away. Numbers of individuals were also low at the outfalls, increasing within 100 m, before dropping to normal levels. No grossly polluted zone, devoid of macrofauna, was found; however, it appeared that a "polluted" zone occurred within 200 m of the diffusers and a "transitional" zone extended to between 800 and 1600 m from the Gisborne outfall, and 400 and 1600 m at Hastings. Multivariate classification and ordination indicated that over the area sampled, the discharges were the main factor shaping the patterns of community structure.

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“…No así dos taxa pertenecientes a la familia Paraonidae, uno de ellos A. catherinae ha sido registrado para la zona de Magallanes (Montiel et al, 2002), mientras que el género Paradoneis no ha sido descrito para la costa de Chile, por lo que su identificación necesita una revisión que confirme su presencia. El uso de la malla de 1 mm reduce los costos de monitoreo (Ferraro et al, 1989) debido a que el tiempo involucrado en el análisis de muestras de sedimento y macrofauna bentónica aumenta cuanto más fina sea la abertura de malla del tamiz (Reish, 1959). Por lo tanto al usar la malla de 500 µm de abertura, aumenta considerablemente el tiempo necesario para el lavado, cernido e identificación taxonómica, en comparación con la malla de 1 mm (Kingston & Riddle, 1989;Couto et al, 2010).…”

Section: Discussionunclassified

“…La malla de 1 mm se recomienda en la detección de impacto antropogénico en el sedimento, ya que la información adicional generada a través de la malla de 500 µm no mejora la posibilidad de detectar diferencias entre áreas potencialmente impactadas y las estaciones de referencia (Hartley, 1982;Bishop & Hartley, 1986;Ferraro et al, 1989Ferraro et al, , 1994Thompson et al, 2003). En particular, la literatura reporta que el uso de la malla de 500 µm permite incrementar las estimaciones de densidad, biomasa, y número de taxa (Reish, 1959;Bachelet, 1990;Couto et al, 2010). Los resultados de este estudio muestran que al usar la malla de 500 µm aumentó la abundancia de poliquetos oportunistas, P. orensanzi y representantes de la familia Capitellidae, asignadas según listado AMBI al GE IV y V como fue señalado por Couto et al (2010).…”

Section: Discussionunclassified

Indicadores bioticos y fraccion de tamanos en la definicion de la macrofauna

Pino

Marín

Núñez

2015

lajar

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RESUMEN. El tamaño de la abertura de malla en tamices para retener macrofauna bentónica, podría afectar la estimación de los indicadores bióticos que describen el estado del sistema béntico submareal. El objetivo de este estudio fue determinar el efecto que tendría el límite inferior de abertura de la malla en las estimaciones de indicadores bióticos en dos centros de cultivo de mitílidos en el Seno de Reloncaví, Puerto Montt, Chile. Los datos fueron colectados desde muestras de sedimento obtenidas en estaciones ubicadas dentro y fuera (referencia) de los centros de cultivo. Se identificó y cuantificó la macrofauna bentónica con mallas de ≥500 µm y ≥1 mm. Se estimó el índice biótico marino (AMBI), la diversidad de Shannon-Wiener (log2) y riqueza de especies. Los resultados de ambos tamices se compararon mediante prueba t. La especie más abundante en ambas localidades fue el poliqueto Chaetozone setosa, asignado al grupo ecológico GE IV, y la Clase Ostracoda, asignada según expertos chilenos al grupo ecológico GE II. Sólo se observó diferencias significativas en la riqueza de especies en las estaciones dentro del cultivo en el Centro 2. La caracterización de los sitios muestreados en términos de indicadores bióticos permitió identificar que el estado ecológico del bentos de los centros de cultivo se encuentra dentro de los rangos aceptables según límites establecidos para diversidad y AMBI. El uso de la malla de 500 µm aumentó la abundancia de especies oportunistas respecto de lo observado con malla de 1 mm pero no cambió significativamente la clasificación del estado ecológico. Palabras clave: indicador biótico, diversidad, abertura de malla, tamiz, macrofauna bentónica, acuicultura. Biotic indicators and their relationship to the lower limit of the definition of the macrofaunaABSTRACT. The size of the sieve mesh opening use to hold the benthic macrofauna could affect certain biotic indicators utilized to describe the ecological status of a given benthic system. The objective of this study was to determine the effect that the lower limit of the mesh opening could have in the estimation of species richness, Shannon-Wiener diversity index and AZTI marine biotic index (AMBI). Data was collected from sediment samples obtain in stations located in and out (reference) of two mussel farms from Reloncaví Sound. The samples were sieved through two sizes of mesh opening: 1 mm and 500 µm. The benthic macrofauna was identified and quantified as ≥500 µm and ≥1 mm. The AMBI, Shannon-Wiener diversity index (log2) and species richness was estimated. Indicators estimated from information obtained with the ≥500 µm and ≥1 mm mesh were compared through a t test. The most abundant species on both localities was the polychaete Chaetozone setosa, assigned to the ecological group GE IV, and the Ostracoda Class, assigned for Chilean experts to the ecological GE 2. Significant differences were observed only in species richness at stations within the culture (in the Center 2). According to the estimated biological indicators the ecologica...

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A Discussion of the Importance of the Screen Size in Washing Quantitative Marine Bottom Samples

Cited by 77 publications

References 6 publications

Benthic Invertebrate Community Composition and Sediment Properties in Barnegat Bay, New Jersey, 1965−2014

Benthic Invertebrate Community Composition and Sediment Properties in Barnegat Bay, New Jersey, 1965−2014

Benthos associated with two New Zealand coastal outfalls

Indicadores bioticos y fraccion de tamanos en la definicion de la macrofauna

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