Structure and temporal fluctuations of two intertidal seagrass-bed communities in New Caledonia (SW Pacific Ocean)

Baron, Jerome; Clavier, Jacques; Thomassin, B. A.

doi:10.1007/bf00346436

Cited by 13 publications

(7 citation statements)

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“…This dependence on the algal biomass and especially the fronds may be because they constitute available surfaces for the development of an important periphyton, the preferred food of most herbivores and grazers (Robertson and Mann, 1982;. Low algal biomass (especially from the stolon system) must also favor the abundance of macrofauna with limited mobility, such as bivalves, as the spacefor development increases (Baron et al, 1993). Bivalves develop in good numbers at all the sites sampled, except at station 2, due to the constraint imposed by the high stolon density.…”

Section: Discussionmentioning

confidence: 99%

“…Esta dependencia por la biomasa algal, fundamentalmente por los frondes, puede deberse a que éstos suponen superficies hábiles para el desarrollo de un importante perifiton, el cual constituye el alimento preferido para la mayoría de los herbívo-ros y/o ramoneadores (Robertson y Mann, 1982;Orth y van Montfrans, 1984). Una baja biomasa de alga (especialmente del sistema de estolones) debe favorecer también la abundancia de la macrofauna de escasa movilidad, como los bivalvos, al aumentar el espacio para desarrollarse (Baron et al, 1993). Los bivalvos se desarrollan en buen número en todos los puntos muestreados, salvo la limitación impuesta por la alta densidad de estolones encontrada en la estación 2.…”

Section: Discussionunclassified

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Influence of the density of Caulerpa prolifera (Chlorophyta) on the composition of the macrofauna in a meadow in Algeciras Bay (Southern Spain)

Moyano

Adiego²,

Estacio³

et al. 2001

Cienc. Mar.

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Recibido en septiembre de 1999; aceptado en octubre de 2000 RESUMENLas fluctuaciones de biomasa y cobertura de Caulerpa prolifera (Chlorophyta) se utilizaron para estimar la influencia de la presencia del alga sobre la composición de la comunidad animal asociada, en una pequeña escala espacial. Por medio de análisis de ordenación, basados en la abundancia de las distintas especies, se han obtenido agrupaciones de estaciones relacionadas con la diferente densidad de alga. Fundamentalmente, se han diferenciado aquellos puntos con mayor biomasa algal (estaciones 1, 2 y 8) y el resto de las estaciones de muestreo (biomasa media o baja). De acuerdo con los resultados del análisis de correspondencias canónicas, la biomasa total de alga, la cobertura y el porcentaje de materia orgánica del sedimento son los factores que explican las diferencias en la composición de las comunidades de macrobentos. Se discuten las respuestas de diversas especies a la distribución espacial del alga. En definitiva, las discontinuidades de Caulerpa propician un alto grado de heterogeneidad en un sistema tan reducido espacialmente como éste, lo que pone de manifiesto la importancia de estos enclaves para el mantenimiento de la biodiversidad en el sistema litoral.Palabras clave: Caulerpa, comunidades de macrobentos, densidad algal, sur de España. ABSTRACTThe coverage and biomass fluctuations of Caulerpa prolifera (Chlorophyta) were used to assess the influence of the alga on the composition of its associated animal community, on a small spatial scale.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionunclassified

Influence of the density of Caulerpa prolifera (Chlorophyta) on the composition of the macrofauna in a meadow in Algeciras Bay (Southern Spain)

Moyano

Adiego²,

Estacio³

et al. 2001

Cienc. Mar.

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show abstract

“…Because of this, C. capitata or N. latericeus could have shown more preferences for those zones since the competition mechanisms should increase in a more stable environment. Also, the high algal cover has a negative effect on the infauna due to, among other reasons, anoxic conditions (Everett 1994) or the physical impediment offered by the stolon structure (Baron et al 1993). These questions have already been demonstrated for other taxa such as bivalves in this Caulerpa bed (Sanchez-Moyano et al 2001a) and could mainly affect subsurface species.…”

Section: Discussionmentioning

confidence: 98%

Distribution and trophic structure of annelid assemblages in aCaulerpa proliferabed from southern Spain

Sánchez-Moyano

García-Asencio

2009

Marine Biology Research

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The main subject of this study was to evaluate the effects of the temporal variation of the Caulerpa prolifera cover on the composition and trophic structure of the annelid assemblage in a meadow from Southern Spain. A total of 51 species of polychaetes and 1 oligochaete were identified, of which only 6 species represented more than 80% of the total dominance (the oligochaete Aktedrilus cf. monospermathecus, the capitellids Notomastus latericeus and Capitella capitata, the syllid Exogone verugera, the nereidid Neanthes caudata and the cirratulid Aphelochaeta filiformis). The annelid assemblage was similar to others found in seagrass systems from nearby geographic areas. As opposed to other taxonomic group such as molluscs and crustaceans, annelid distribution was more influenced throughout the meadow by the percentage of organic matter in sediment than by algal cover. With respect to trophic structure, the meadow was dominated quantitatively by surface and subsurface deposit feeders; surface deposit feeders and carnivores showed the more homogeneous distribution throughout sampling periods and stations; omnivores were abundant in high cover and high organic matter content stations, meanwhile subsurface deposit feeders were abundant in the rest of the meadow.

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“…While Spennemann (1987) has classified Gafrarium tumidum as a brackish water shellfish, recent research by Baron et al (1993) from New…”

Section: A Change In Shellfish Habitatmentioning

confidence: 99%

Investigating shellfish deposition and landscape history at the Natia Beach site, Fiji

Morrison¹,

Cochrane²

2008

Journal of Archaeological Science

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Abstract:The relationship between environmental variation and subsistence practices is a central point of discussion in much Oceanic archaeology. While human predation can significantly reduce prey populations, environmental variation also contributes to reductions in prey abundance, possibly leading to increased human competition and resource scarcity. At the Natia Beach Site, Nacula Island, Fiji, geoarchaeological evidence suggests that coastal progradation began soon after initial occupation of the coastal plain. Additionally, at approximately 650 BP a marked increase in clay and silt deposition occurred. Changes in coastal geomorphology may be explained by landscape response to regional Mid-Holocene sea level fall combined with human induced soil erosion due to upland settlement. Smaller scale environmental changes associated with climate variability may have also played a role. Additionally, landscape change appears to have had a measurable impact on local nearshore mollusks that are sensitive to high levels of water turbidity. Minor evidence of human exploitation is observable in this shellfish assemblage, although changes in predation pressure may have allowed shellfish populations to recover. Increased ceramic diversity and fortified settlements also appear at approximately 650 BP on Nacula and other parts of Fiji. The suite of changes at Natia may be explained by processes of regional and local environmental changes, and human adaptation in terms of subsistence, spatial organization, and competition.3

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Structure and temporal fluctuations of two intertidal seagrass-bed communities in New Caledonia (SW Pacific Ocean)

Cited by 13 publications

References 20 publications

Influence of the density of Caulerpa prolifera (Chlorophyta) on the composition of the macrofauna in a meadow in Algeciras Bay (Southern Spain)

Influence of the density of Caulerpa prolifera (Chlorophyta) on the composition of the macrofauna in a meadow in Algeciras Bay (Southern Spain)

Distribution and trophic structure of annelid assemblages in aCaulerpa proliferabed from southern Spain

Investigating shellfish deposition and landscape history at the Natia Beach site, Fiji

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