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    Feeding rates on and nutritional content of non-native algal collected from Antarctica, Fiji, and California.

Feeding rates on and nutritional content of non-native algal collected from Antarctica, Fiji, and California.

Website: https://www.bco-dmo.org/dataset/743755
Data Type: Other Field Results, experimental
Version: 1
Version Date: 2018-08-20

» Detecting genetic adaptation during marine invasions (Genetic Adaptation Marine Inv)
Sotka, ErikGrice Marine Laboratory - College of Charleston (GML-CoC)Principal Investigator, Contact
Murren, CourtneyCollege of Charleston (CofC)Co-Principal Investigator
Strand, AllanGrice Marine Laboratory - College of Charleston (GML-CoC)Co-Principal Investigator
Ake, HannahWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Feeding rates on and nutritional content of non-native algal collected from Antarctica, Fiji, and California.


Spatial Extent: N:38.32 E:-64.05 S:-64.77 W:-123.04
Temporal Extent: 1996 - 2014

Dataset Description

Feeding rates on and nutritional content of non-native alga.

Acquisition Description

These data are described in detail in Bippus et al. 2018. We offered tissue from a total of 700 Gracilaria vermiculophylla thalli from 14 native Japanese and 25 non-native sites to a North American population of the generalist amphipod Ampithoe valida. Assays were conducted from May to October 2015. Two 4 cm G. vermiculophylla apices were excised from a single thallus and placed into separate 250 mL plastic cups (30 × 24 × 18 cm). Apices were then allowed to relax for 24 h before beginning the assay to eliminate any inductive effects from excision. In one cup, we placed one amphipod, while the 2nd cup held an apex without an amphipod to account for autogenic changes in mass. Each tip was blotted dry and weighed before and after each assay. To measure dry mass, autogenic control tips were individually placed in pre-weighed foil packets in a drying oven at 65 °C. We assayed between 14 and 20 thalli per population. Assays ran for 24 h in the dark at room temperature. Consumption rates (measured as dry mass) per amphipod were standardized by amphipod length.

Processing Description

BCO-DMO Data Processing Notes:

-Changed NA to nd
-Reformatted column names to comply with BCO-DMO standards

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Related Publications

Bippus, P. M., Krueger-Hadfield, S. A., & Sotka, E. E. (2018). Palatability of an introduced seaweed does not differ between native and non-native populations. Marine Biology, 165(2). doi:10.1007/s00227-018-3291-5

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Plant_IDPlant identification unitless
Control_Initial_Weight_mgInitial weight of control milligrams
Control_Final_Weight_mgFinal weight of control milligrams
Control_Amphipod_Size_mmAmphipod size of control millimeters
No_Choice_Initial_Weight_mgInitial weight of amphipod with no choice of food milligrams
No_Choice_Final_Weight_mgFinal weight of amphipod with no choice in food milligrams
No_Choice_Amphipod_Size_mmAmphipod size of individual with no choice in food millimeters
trt_ctrl_ratioRatio of treatment to autogenic control unitless
mg_wmConsumption wetmass milligrams
mg_wm_corrWet mass corrected for amphipod length milligrams
dm_wm_ratioAmount of drymass to wetmass ratio milligrams
afdm_wm_ratioAmount of ash-free-dry-mass to wetmass ratio miigrams

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Project Information

Detecting genetic adaptation during marine invasions (Genetic Adaptation Marine Inv)

Coverage: Estuaries of NW and NE Pacific; estuaries of NW and NE Atlantic

Description from NSF award abstract:
Biological introductions, defined as the establishment of species in geographic regions outside the reach of their natural dispersal mechanisms, have dramatically increased in frequency during the 20th century and are now altering community structure and ecosystem function of virtually all marine habitats. To date, studies on marine invasions focus principally on demographic and ecological processes, and the importance of evolutionary processes has been rarely tested. This knowledge gap has implications for management policies, which attempt to prevent biological introductions and mitigate their impacts. The Asian seaweed Gracilaria vermiculophylla has been introduced to every continental margin in the Northern Hemisphere, and preliminary data indicate that non-native populations are both more resistant to heat stress and resistant to snail herbivory. The project will integrate population genetics, field survey and common-garden laboratory experiments to comprehensively address the role of rapid evolutionary adaptation in the invasion success of this seaweed. Specifically, the PIs will answer the following. What is the consequence of introductions on seaweed demography and mating systems? How many successful introductions have occurred in North America and Europe? Where did introduced propagules originate? Do native, native-source and non-native locations differ in environmental conditions? Do native, native-source and non-native populations differ in phenotype?

The intellectual merit of this project is based on three gaps in the literature. First, while biological invasions are widely recognized as a major component of global change, there are surprisingly few studies that compare native and non-native populations in their biology or ecology. Native and non-native populations will be surveyed in a similar manner, allowing assessment of differences in population dynamics, mating system, epifaunal and epiphytic communities, and the surrounding abiotic and biotic environment. Second, G. vermiculophylla exhibits a life cycle typical of other invasive species (including some benthic invertebrates), yet we still lack data on the effects of decoupling the haploid and diploid stages on genetic structure, and in turn, on the evolvability of their populations. Finally, this project will provide unequivocal evidence of an adaptive shift in a marine invasive. To our knowledge, such evolutionary change has been described previously for only a complex of marine copepod species. G. vermiculophylla will serve as a model for understanding evolution in other nuisance invasions, and perhaps lead to novel methods to counter future invasions or their spread.

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Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)

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This document is created by info v 4.1f 5 Oct 2018 from the content of the BCO-DMO metadata database.    2021-04-10  16:14:37