Trophic structure of soft-bottom macrobenthos in an inlet in north-western Spain

Cacabelos, Eva; Domínguez, Marta; Troncoso, Jesús S.

doi:10.1017/s0025315409003105

Cited by 8 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Median grain size (MGS) for the FL station was 12.3 ±1.8 µm, indicating this sample site lies in the range of muddy sediments. Previous studies in the Ría de Vigo (Cacabelos et al, 2009;Rodil et al, 2009) showed that sediments with similar MGS (10 -13 µm) were dominated by surface and subsurface deposit feeders. Deposit feeders obtain their nutritional intake mainly from sedimented organic matter (Heip et al 1995) and would mainly favour aerobic processes and oxidized sediment conditions as they enhance oxygen transfer to the sediment burrow irrigation (Welsh 2003).…”

Section: Benthic Oxygen Fluxesmentioning

confidence: 93%

Benthic oxygen and nutrient fluxes in a coastal upwelling system (Ria de Vigo, NW Iberian Peninsula): seasonal trends and regulating factors

Alonso-Pérez¹,

Castro²

2014

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Benthic oxygen and nutrient fluxes play a key role in the biogeochemical cycles of carbon and nutrients in coastal regions. Even so, there are no previous studies focused on benthic fluxes in the NW Iberian coastal upwelling system on an annual basis. The present work analyses the seasonal trends of benthic oxygen and nutrient fluxes as well as main factors that control them in the Ría de Vigo. Between April 2004 and January 2005, 16 oceanographic cruises were carried out to measure water column properties, vertical fluxes of particulate organic matter by means of sediment traps, and oxygen and nutrient fluxes using a benthic chamber. Rates of sediment oxygen consumption (18 to 50 mmol m-2 d-1), phosphate (0.08 to 0.34 mmol m-2 d-1), silicate (1.7 to 10 mmol m-2 d-1), ammonium (1.1 to 4.9 mmol m-2 d-1) and nitrate (-0.95 to 0.78 mmol m-2 d-1) ranged near the upper limit of benthic fluxes found in similar coastal areas. Nitrogen fluxes were dominated by ammonium fluxes (83%). Benthic fluxes of oxygen, ammonium, phosphate and dissolved silicate were significantly lower during winter but did not show differences during spring, summer or autumn. The strong mutual correlations between them points to the importance of aerobic respiration in the remineralization of organic matter. The amount and quality of organic matter appears to be an influencing factor on the benthic fluxes but it seems that changes in temperature, modulated by upwelling / downwelling pulses, trigger and control the benthic fluxes on the short time scale. The study assesses the importance of benthic fluxes to the potential primary production of the system as remineralized benthic nitrogen and phosphorous may account up to 41 % and 61 %, respectively, of the nutrient inputs from upwelled and continental runoff waters.

show abstract

Section: Benthic Oxygen Fluxesmentioning

confidence: 93%

Benthic oxygen and nutrient fluxes in a coastal upwelling system (Ria de Vigo, NW Iberian Peninsula): seasonal trends and regulating factors

Alonso-Pérez¹,

Castro²

2014

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…Most studies of macrobenthic trophic structure tend to classify benthic fauna in terms of strictly defined trophic groups only (e.g. Chardy & Clavier 1988, Gaston & Nasci 1988, Ricciardi & Bourget 1999, García-Arberas & Rallo 2002, Coyle et al 2007, Albano & Obenat 2009, Cacabelos et al 2009, Dolbeth et al 2009). Most commonly these trophic groups are: suspension feeders, deposit feeders (surface and subsurface), carnivores, herbivores and omnivores.…”

mentioning

confidence: 99%

Facultative feeding and consistency of trophic structure in marine soft-bottom macrobenthic communities

Macdonald¹,

Burd²,

Roodselaar³

2012

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

We investigated the roles of facultative versus strict niche feeding in the maintenance of trophic consistency in soft-bottom macrobenthic communities in the Strait of Georgia, British Columbia, Canada. Changes in trophic structure across gradients in depth and percent fine sediments were examined over a broad regional scale by identifying trophic compartment(s) responsible for the resulting trophic changes. The use of proportional organic biomass data allows direct comparison of community trophic structure across diverse hydrographic regime(s), large ranges in overall biomass and productivity, and highly variable community composition. Cluster analyses revealed low overall dissimilarity in trophic structure across all substrate and depth ranges (24 and 28% divergence, respectively), suggesting an overall economy of trophic function. Similarity percentage (SIMPER) analyses revealed that low trophic dissimilarity is driven primarily by the remarkably even distribution of the 2 dominant facultative feeding groups in all habitat types. These facultative groups contained the most ubiquitous and abundant taxa found throughout the Strait, and likely confer strong resilience in these communities to habitat change. In contrast, the small but significant divergences in trophic structure over depth and percent fine sediment gradients was explained by the distributions of strict niche feeders: (1) macro-omnivores and herbivores dependent on non-detrital food sources were important in shallow areas (< 25 m) with coarse sediments (<10% fine sediment), contributing to a unique trophic composition in these areas; and (2) subsurface deposit feeders were the only trophic group to vary significantly in proportional biomass explained by depth and percent fine sediment combined (22%; positive linear response to both factors).KEY WORDS: Deposit feeding · Suspension feeding · Strait of Georgia · Salish Sea · British Columbia · Facultative feeding · Trophic structure Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 445: [129][130][131][132][133][134][135][136][137][138][139][140] 2012 2001). Most studies of macrobenthic trophic structure tend to classify benthic fauna in terms of strictly defined trophic groups only (e.g. Chardy & Clavier 1988, Gaston & Nasci 1988, Ricciardi & Bourget 1999, García-Arberas & Rallo 2002, Coyle et al. 2007, Albano & Obenat 2009, Cacabelos et al. 2009, Dolbeth et al. 2009). Most commonly these trophic groups are: suspension feeders, deposit feeders (surface and subsurface), carnivores, herbivores and omnivores. However, many macrobenthic taxa exhibit more than one feeding mode (e.g. Okamura 1990, Brown et al. 2000, Gaudencio & Cabral 2007, Gray & Elliott 2009). This trophic flexibility has been proposed as an important feature of benthic marine communities (Cadée 1984). For instance, many species of facultatively carnivorous polychaetes are also known to deposit feed (e.g. Glyceridae, members of Lumbrineridae; Fauchald & Jumars 1979). Other taxa ...

show abstract

“…Email: tristanjstringer@gmail.com physical factors such as salinity, tidal exposure, sediment size and oxygen concentration (Findlay 1981;Brito et al 2009). On a habitat scale (cm 2 Ám 2 ) biological variables increase in importance (Findlay 1981;Sandulli & Pinckney 1999;Azovsky et al 2004), although these biological factors are often themselves shaped by physical factors (Hogue & Miller 1981;Hicks & Coull 1983;De Troch et al 2006;Cacabelos et al 2009). The factor which has been suggested to have the most influence on species distribution is sediment size (Findlay 1981;Hicks & Coull 1983;Azovsky et al 2004); in particular the proportion of the silty (B63 mm) sediment fraction (Hicks & Coull 1983;Udalov et al 2005;Cacabelos et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Effects of environmental gradients on the distribution of harpacticoid copepods in an intertidal flat, Portobello Bay, Otago Harbour, New Zealand

Stringer

Korsman

Peralta

et al. 2012

New Zealand Journal of Marine and Freshwater Research

View full text Add to dashboard Cite

Harpacticoid copepods are often one of the most dominant taxa in marine sediments, but there is limited knowledge of the physicochemical sediment characteristics that affect distribution of native New Zealand copepod species. Environmental gradients and abundance of harpacticoid copepods were therefore surveyed in Portobello Bay, an intertidal sand and mud flat in Otago Harbour, New Zealand. Generalised linear mixed models (GLMMs) were used to determine the relationship between physical factors and species abundance as well as to examine interspecies interactions. Six copepod species were present at the study site: Amphiascoides sp., Enhydrosoma sp., Parastenhelia megarostrum, Robertsonia propinqua, and two species of Quinquelaophonte. Distribution of species was found to be significantly correlated to sediment size, organic content, tidal reach, salinity and pH. In addition to these physical factors, speciesÁspecies interactions also affected copepod abundance. This information is relevant for understanding factors influencing copepod distribution, but also will shape guidelines for use in marine sediment bioassays using harpacticoid copepods.

show abstract

Trophic structure of soft-bottom macrobenthos in an inlet in north-western Spain

Cited by 8 publications

References 24 publications

Benthic oxygen and nutrient fluxes in a coastal upwelling system (Ria de Vigo, NW Iberian Peninsula): seasonal trends and regulating factors

Benthic oxygen and nutrient fluxes in a coastal upwelling system (Ria de Vigo, NW Iberian Peninsula): seasonal trends and regulating factors

Facultative feeding and consistency of trophic structure in marine soft-bottom macrobenthic communities

Effects of environmental gradients on the distribution of harpacticoid copepods in an intertidal flat, Portobello Bay, Otago Harbour, New Zealand

Contact Info

Product

Resources

About