Effects of environmental variables on burial depth of two infaunal bivalves inhabiting a tidal flat in southern Chile

Lardies, Marco A.; Clasing, Elena; Navarro, Jorge M.; Stead, Robert A.

doi:10.1017/s0025315401004635

Cited by 29 publications

(26 citation statements)

References 18 publications

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“…IRIBARNE et al (1998) reported that the American oystercatcher Haematopus palliatus Temminck, 1820 was an important source of T. plebeius mortality in Argentinean estuaries. Similar conditions were observed for T. dombeii in the tidal flat of Corhuín, Chile (LARDIES et al 2001). No individuals of M. balthica over five years old were observed in the intertidal areas, reflecting the high mortality of adults predated upon by birds (CARDOSO et al 2007).…”

Section: Resultssupporting

confidence: 76%

Population biology and secondary production of the stout razor clam Tagelus plebeius (Bivalvia, Solecurtidae) on a sandflat in southeastern Brazil

Abrahão¹,

Cardoso²,

Yokoyama³

et al. 2010

Zoologia (Curitiba, Impr.)

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The population biology and production of the stout razor clam Tagelus plebeius Lightfoot, 1786 were investigated on an intertidal sandflat on the southeast coast of Brazil (Enseada Beach, São Sebastião, state of São Paulo) between April 1997 and April 1998. Two rectangular sites of 50 X 10 m parallel to the waterline were established, site A (upper intertidal level) and site B (middle intertidal level), where the samples were taken in an 0.5 x 0.5 m quadrat. High abundances were recorded in winter and spring, with no significant differences between the sites. The high bivalve abundances were related to the presence of very fine homogeneous sediment with low salinities. Tagelus plebeius had negative allometric growth, characteristic of deep burrowers for the relationships DM/SL and AFDM/SL. Parameters of the modified von Bertalanffy growth function were: L∞ = 67.01 mm, K = 1.73 year-1, t0 = -0.11 year, C = 0.43, WP = 0.96. The instantaneous mortality (Z) was 3.12 year-1, relatively high in comparison to other tropical bivalve populations. Secondary production was 1.53 g AFDM m-2 year-1, with a P/B ratio reaching 1.37 year-1. This high turnover ratio (P/B) was related to a rapid population replacement, connected with the short life span and high mortality of the species

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Section: Resultssupporting

confidence: 76%

Population biology and secondary production of the stout razor clam Tagelus plebeius (Bivalvia, Solecurtidae) on a sandflat in southeastern Brazil

Abrahão¹,

Cardoso²,

Yokoyama³

et al. 2010

Zoologia (Curitiba, Impr.)

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“…Several factors could have contributed to this result. First, large bivalves generally live deeper in the sediment column than smaller conspecific ones, as their proportionally longer siphons allow them to burrow deeper to avoid predation by fishes and shorebirds (Irlandi & Mehlich 1996, de Goeij et al 2001, Lardies et al 2001. Consequently, in this case, the larger bivalves may have been further away from the environmental stressor, namely the terrigenous sediment deposited at the surface.…”

Section: Discussionmentioning

confidence: 99%

Terrestrially derived sediment: response of marine macrobenthic communities to thin terrigenous deposits

Lohrer

Thrush²,

Hewitt³

et al. 2004

Mar. Ecol. Prog. Ser.

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Coastal marine habitats adjacent to catchments with encroaching human development are likely to experience increased sediment loadings in ensuing decades. Thus, sedimentary disturbance regimes in which coastal marine benthic communities have evolved may be shifting as depositional events exceeding critical thresholds become more frequent. To understand the threat posed by terrigenous sedimentation in an embayment with increasing urban development, we determined the thickness and frequency at which terrigenous sediment deposits begin to affect the benthos. We performed manipulative experiments involving layers of terrigenous sediment <1 cm thick in a variety of intertidal habitats in the Whitford embayment, North Island, New Zealand. Results of 3 separate experiments performed at 5 sites were largely consistent. While experimental plots were never completely defaunated, as little as 3 mm of the terrigenous material was sufficient to significantly alter macrobenthic community structure (measured after 10 d, relative to 0 mm controls). The direction of change was predominantly negative; the number of individuals and taxa declined as a result of sediment application, as did the densities of nearly every common species. Large bivalves were less affected than smaller ones, and deeper-dwelling species were less affected than ones at the sediment surface. With repeated applications of thin terrigenous layers (3 mm thickness, monthly over a 6 mo period), the sandflat sediments gradually became finer (clay volume % increased), and macrofaunal community composition progressively diverged from controls. To summarise, macrofauna were negatively affected by extremely small amounts of terrigenous sediment, and repeated depositional events did more damage than single ones. With increasing defoliation and excavation of catchment hillsides, the frequency of depositional events of a given intensity is likely to quicken, indicating an enhanced likelihood of macrofaunal disturbance and degradation in estuarine tidal flats. Management decisions that protect coastal catchments may partially ameliorate the threat to the benthos in coastal receiving waters.KEY WORDS: Land-use · Sediment impacts · Terrigenous sediment deposition · Marine benthos · Sandflat · Low intensity · High-frequency disturbance · Self-organized criticality Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 273: [121][122][123][124][125][126][127][128][129][130][131][132][133][134][135][136][137][138] 2004 are reacting to and recovering from variously sized disturbances, perhaps of several types and intensities, dating back to various points in time (Connell 1978, Huston 1979, Yodzis 1986, Tokeshi 1999.With so many factors potentially influencing disturbance-recovery dynamics, ecologists have been forced to simplify their models and experimental investigations by focusing on specific circumstances. For example, studies of disturbance-recovery dynamics often begin with the complete defaunation of disturbed pat...

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“…As time of exposure to air occurs only for a few hours during spring low tides at Coihuin tidal flat, it is expected that the amount of food obtained through this behavior would not be significant when compared to the food acquired under a suspension feeding mode. Furthermore, Lardies et al (2001) described the annual pattern of burial depth in natural populations of the bivalves T. dombeii and Venus antiqua (obligated suspension feeder) in relation to annual food availability in both the water column and sediment, at Coihuín tidal flat. The burial depths dynamics for both species showed a strong correlation with food availability in water column, approximately 60% of the variability in burial depth in both species was explained by concentration of chlorophyll a in the water column (Lardies et al 2001).…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, Lardies et al (2001) described the annual pattern of burial depth in natural populations of the bivalves T. dombeii and Venus antiqua (obligated suspension feeder) in relation to annual food availability in both the water column and sediment, at Coihuín tidal flat. The burial depths dynamics for both species showed a strong correlation with food availability in water column, approximately 60% of the variability in burial depth in both species was explained by concentration of chlorophyll a in the water column (Lardies et al 2001). That is, food concentration on the sediment did not affect the burial depth of T. dombeii supporting the pattern obtained in laboratory, indicating that deposit feeding seems to have a minor significance in T. dombeii.…”

Section: Discussionmentioning

confidence: 99%

Feeding behavior of the infaunal bivalve Tagelus dombeii (Lamarck, 1818). Suspension vs. deposit feeding

Navarro

Clasing

Lardies

et al. 2008

Rev. biol. mar. oceanogr.

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Effects of environmental variables on burial depth of two infaunal bivalves inhabiting a tidal flat in southern Chile

Cited by 29 publications

References 18 publications

Population biology and secondary production of the stout razor clam Tagelus plebeius (Bivalvia, Solecurtidae) on a sandflat in southeastern Brazil

Population biology and secondary production of the stout razor clam Tagelus plebeius (Bivalvia, Solecurtidae) on a sandflat in southeastern Brazil

Terrestrially derived sediment: response of marine macrobenthic communities to thin terrigenous deposits

Feeding behavior of the infaunal bivalve Tagelus dombeii (Lamarck, 1818). Suspension vs. deposit feeding

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