Influence of a River Plume on the Distribution of Brachyuran Crab and Mytilid Bivalve Larvae in Saco Bay, Maine

Bloodsworth, Kylie H.; Tilburg, Charles E.; Yund, Philip O.

doi:10.1007/s12237-015-9951-5

Cited by 5 publications

(5 citation statements)

References 60 publications

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“…Although earlier field surveys reported mussel larvae only in the top few metres of the water column [ 45 ], subsequent to this study we have routinely retrieved them from as deep as 14 m in the Gulf ofMaine (Philip O. Yund 2012–2014, unpublished data), and bivalve larvae in general are common in the Northwest Atlantic down to 20 m or more [ 67 ]. Much smaller scale sampling around a river plume in the southwestern Gulf of Maine has provided evidence of this subduction mechanism [ 68 ]. However, we are sceptical that subduction results in across-shelf transport on the larger spatial scale of our study region.…”

Section: Discussionmentioning

confidence: 99%

Across-shelf distribution of blue mussel larvae in the northern Gulf of Maine: consequences for population connectivity and a species range boundary

2015

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Studies of population connectivity have largely focused on along-shelf, as opposed to across-shelf, processes. We hypothesized that a discontinuity in across-shelf mixing caused by the divergence of the Eastern Maine Coastal Current (EMCC) from shore acts as an ecological barrier to the supply of mussel larvae to the coast. Existing data on the relative abundance of two congeneric blue mussels, Mytilus edulis and M. trossulus, were analysed to quantify the association of M. trossulus with the colder temperature signal of the EMCC and generate larval distribution predictions. We then sampled the across-shelf distribution of larvae along two transects during 2011. Larvae were identified using restriction digests of PCR amplicons from the mitochondrial 16S rDNA. Mytilus edulis larvae were consistently abundant on either the inshore and offshore transect ends, but not homogeneously distributed across the shelf, while M. trossulus larvae were less common throughout the study area. The divergence of the EMCC from shore appears to create a break in the connectivity of M. edulis populations by isolating those inshore of the EMCC from upstream larval sources. Across-shelf transport processes can thus produce connectivity patterns that would not be predicted solely on the basis of along-shelf processes.

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Section: Discussionmentioning

confidence: 99%

Across-shelf distribution of blue mussel larvae in the northern Gulf of Maine: consequences for population connectivity and a species range boundary

2015

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“…River plumes usually have high nutrient content and support primary production and algal biomass (Mallin et al, 2005;Peterson and Peterson, 2008;Kudela and Peterson, 2009). The influence of river plumes on larval transport and survival is related with their tolerance to osmotic shocks and their capacity to move vertically through the water column and density gradients (Bloodsworth et al, 2015). Different taxonomic groups will have different conditions to move and survive within river-influenced environments (Bloodsworth et al, 2015).…”

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confidence: 99%

“…The influence of river plumes on larval transport and survival is related with their tolerance to osmotic shocks and their capacity to move vertically through the water column and density gradients (Bloodsworth et al, 2015). Different taxonomic groups will have different conditions to move and survive within river-influenced environments (Bloodsworth et al, 2015). Similarly, the influence of the river plume on sediments and benthos can be observed several (Forrest et al, 2007) to hundred (Grimes and Kingsford, 1996) kilometers from the river mouth.…”

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Modelling the interannual variability of Maipo and Rapel river plumes off central Chile

Salcedo-Castro¹,

Olita²,

Saavedra³

et al. 2023

Preprint

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Abstract. River plumes have a direct influence on coastal environments, impacting coastal planktonic and benthic communities, including fishery resources. In general, the main drivers of river plume dynamics are the river discharge and the alongshore wind stress, whereas the tides and topography play a secondary role. In the Central parto of Chile, rivers flowing into the eastern Pacific have a relatively short path on the land, with a high slope; further they are characterized by a mixed snow-rain regime. This study aims to understand the interannual variability of the plumes of the Maipo and Rapel rivers in the Coastal/shelf area off Chile and its influence on local ocean dynamics. We used the Coastal and Regional Ocean Community model (CROCO), with 1 km resolution and 20 sigma levels, to simulate the ocean dynamics of the area over the period 2003–2011. The results show that the plume’s area coverage and coastal ocean salinity are strongly correlated to the river discharges. The predominant southwestern wind controls the plumes orientation toward northwest; however, episodes of wind changing direction from northwest in winter can reverse the plumes direction, making them squeezed to the coast and moving southward. Results also show, for the decade under evaluation, a salification trend linked to the severe droughts hitting Central Chile during the studied period. This salification determines a change in local dynamics.

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“…River plumes usually have high nutrient content and support primary production and algal biomass (Mallin et al, 2005;Peterson and Peterson, 2008;Kudela and Peterson, 2009). The influence of river plumes on larval transport and survival is related to their tolerance of osmotic shocks and their capacity to move vertically through the water column and density gradients (Bloodsworth et al, 2015). Different taxonomic groups will have different conditions to move and survive within river-influenced environments (Bloodsworth et al, 2015).…”

mentioning

confidence: 99%

“…The influence of river plumes on larval transport and survival is related to their tolerance of osmotic shocks and their capacity to move vertically through the water column and density gradients (Bloodsworth et al, 2015). Different taxonomic groups will have different conditions to move and survive within river-influenced environments (Bloodsworth et al, 2015). Similarly, the influence of the river plume on sediments and benthos can be observed several kilometers (Forrest et al, 2007) to hundreds of kilometers (Grimes and Kingsford, 1996) from the river mouth.…”

mentioning

confidence: 99%

Modeling the interannual variability in Maipo and Rapel river plumes off central Chile

Salcedo-Castro,

Olita,

Saavedra

et al. 2023

Ocean Sci.

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Abstract. River plumes have a direct influence on coastal environments, impacting coastal planktonic and benthic communities, including fishery resources. In general, the main drivers of river plume dynamics are the river discharge and the alongshore wind stress, whereas the tides and topography play a secondary role. In central Chile, rivers flowing into the eastern Pacific have a relatively short path on land, with a high slope and a mixed snow–rain regime. This study aims to understand the interannual variability in the plumes of the Maipo and Rapel rivers in the coastal/shelf area off central Chile and their influence on local ocean dynamics. We used the Coastal and Regional Ocean Community (CROCO) model, with 1 km horizontal resolution and 20 sigma levels, to simulate the ocean dynamics for the period 2003–2011. The results show that the plume's area coverage and coastal ocean salinity are strongly correlated with the river discharges. The predominant northeastward winds control the plumes' orientation toward the northwest. However, episodes of southeastward winds in winter can reverse the plumes' direction, promoting their attachment to the coast and southward transport. Results also show a salification trend linked to the severe droughts hitting central Chile during the studied period. This salification determines a change in local dynamics which could be more frequent in future scenarios of climate change with a significant lack of rain and river discharges along central Chile.

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Influence of a River Plume on the Distribution of Brachyuran Crab and Mytilid Bivalve Larvae in Saco Bay, Maine

Cited by 5 publications

References 60 publications

Across-shelf distribution of blue mussel larvae in the northern Gulf of Maine: consequences for population connectivity and a species range boundary

Across-shelf distribution of blue mussel larvae in the northern Gulf of Maine: consequences for population connectivity and a species range boundary

Modelling the interannual variability of Maipo and Rapel river plumes off central Chile

Modeling the interannual variability in Maipo and Rapel river plumes off central Chile

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