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| griddap | Subset | tabledap | Make A Graph | wms | files | Accessible | Title | Summary | FGDC | ISO 19115 | Info | Background Info | RSS | Institution | Dataset ID | |
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| log in | [Latitudinal variation in shell thickness of snails across 20 years] - Latitudinal variation in the shell thickness and tissue mass of Littorina obtusata snails in 1995-1997 and 2017-2018 (Local adaptation and the evolution of plasticity under predator invasion and warming seas: consequences for individuals, populations and communities) | The impact of invasive predators during the early stages of invasion is often variable in space and time. Such variation is expected to initially favor plasticity in prey defenses but fixed defenses as invaders become established. Coincident with the range expansion of an invasive predatory crab in the Gulf of Maine we document rapid changes in shell thickness – a key defense against shell crushing predators – of an intertidal snail. Field experiments, conducted 20 years apart, revealed that temporal shifts in shell thickness were driven by the evolution of increased trait means and erosion of thickness plasticity. The virtual elimination of the trade-off in tissue mass that often accompanies thicker shells is consistent with the evolution of fixed defenses under increasingly certain predation risk. These data describe latitudinal variation in the shell thickness and tissue mass of snail (Littorina obtusata) populations throughout the Gulf of Maine in 1995-1997 and 2017-2018. These data allowed us to evaluate the relationship between spatiotemporal changes in green crab density and spatiotemporal variation in snail shell thickness and tissue mass.\n\ncdm_data_type = Other\nVARIABLES:\nYear (unitless)\nSite_Name (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nShell_Length (millimeters (mm))\nShell_Thickness (millimeters (mm))\nTissue_Mass (milligrams (mg))\nShell_Mass (milligrams (mg))\n | BCO-DMO | bcodmo_dataset_990839_v1 | ||||||||||||
| https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_918420_v1 | https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_918420_v1.graph | https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_918420_v1/ | public | [Shell thickness of mussel recruits] - Shell thickness of mussel recruits quantified in two species, Mytilus trossulus and Mytilus californianus (Coastal mosaics of local adaptation and the eco-evolutionary dynamics of a marine predator-prey interaction) | Mussels are common on rocky shores along the west coast of North America and are prey to a number of species, including the Channeled Dogwhelk, Nucella canaliculata. When N. canaliculata hatch, they are dependent on a supply of newly recruited prey that are variable in abundance. To determine the strength of selection that early-life diet may impose on juvenile dogwhelks, recruit mussel shell thickness was quantified for two mussel species, Mytilus trossulus and Mytilus californianus. In addition, recruit M. californianus were collected from two locations, Bodega Marine Reserve and Soberanes Point, known to differ in the thickness of adult M. californianus.\n\ncdm_data_type = Other\nVARIABLES:\nMussel_Number (unitless)\nMussel_Type (unitless)\nSite_Latitude (degrees_north)\nlongitude (Site_longitude, degrees_east)\nWeight (grams (g))\nMagnification (unitless)\nLength_L (millimeters (mm))\nLength_R (millimeters (mm))\nArea_L (square millimeters (mm^2))\nArea_R (square millimeters (mm^2))\nTotal_Area (square millimeters (mm^2))\nShell_Thickness (grams per square millimeter (g/(mm^2)))\nNotes (unitless)\n | https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_918420_v1/index.htmlTable | https://www.bco-dmo.org/dataset/918420
| https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_918420_v1.rss | https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_918420_v1&showErrors=false&email= | BCO-DMO | bcodmo_dataset_918420_v1 |