http://lod.bco-dmo.org/id/dataset/632647
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2016-01-14
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Experimental results describing the tenacity of byssal threads produced by mussels analyzed at Hopkins Marine Station during 2014 (Experiments in a Model Ecosystem project)
2016-01-14
publication
2016-01-14
revision
BCO-DMO Linked Data URI
2016-01-14
creation
http://lod.bco-dmo.org/id/dataset/632647
Dr Mark W Denny
Stanford University - Hopkins
principalInvestigator
Dr Bengt J Allen
California State University Long Beach
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Denny, M. W., Allen, B. J. (2016) Experimental results describing the tenacity of byssal threads produced by mussels analyzed at Hopkins Marine Station during 2014 (Experiments in a Model Ecosystem project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2016-01-14) Version Date 2016-01-14 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/632647 [access date]
The tenacity of byssal threads produced by mussels Dataset Description: <p>This dataset includes the number and attachment sites of byssal threads produced by individual mussels.</p>
<p><strong>Related Reference:</strong></p>
<p>Cole, A. and Denny MW. (2014) United we fail: group versus individual strength in the ribbed mussel <em>Mytilus californianus</em>. <em>Biol. Bull. </em>227: 61-67.</p>
<p>These data are also available at the Stanford Digital Repository:&nbsp;<a href="http://purl.stanford.edu/ph942zz5524" target="_blank">http://purl.stanford.edu/ph942zz5524</a></p>
<p><strong>Related Datasets:</strong></p>
<p><a href="http://www.bco-dmo.org/dataset/630154" target="_blank">mussel size vs. byssal count</a><br />
<a href="http://www.bco-dmo.org/dataset/632629" target="_blank">mussel size vs. byssal width</a><br />
<a href="http://www.bco-dmo.org/dataset/632681" target="_blank">mussel dislodgement data</a></p> Methods and Sampling: <p>Field measurements were performed in three separate beds of the California sea mussel, Mytilus californianus, in the rocky intertidal zone adjacent to Hopkins Marine Station, Pacific Grove, California. The beds comprised two layers of mussels: a basal layer attached to the rock and a surface layer attached to the basal layer. Measurements were conducted in summer and early autumn of 2008.</p>
<p><strong>Tenacity measurements:</strong><br />
We used the method of Denny (1987) to measure the attachment strength of individual bed mussels in the surface layer. We attached a recording spring scale to a mussel by placing a hook through a hole drilled in the exposed posterior lip of the shell. We then pulled the mussel evenly and swiftly perpendicular to the substratum (i.e., in the direction of lift) until it was dislodged. We divided the recorded force by the mussel’s planform area to calculate tenacity. Planform areas were estimated using shell height and width as the axes of an ellipse, which closely approximated the shape of mussels’ cross section. We measured shell height and width to the nearest millimeter using calipers. Sampled mussels were separated by at least 10 cm to ensure that each sample had no effect on subsequent samples.</p>
<p>We also tested groups of contiguous mussels in the surface layer. To pull multiple mussels simultaneously, we implemented an expansion of the procedure used to measure individuals. We attached groups of 2-6 contiguous mussels to a spring scale via hooks and lines, and adjusted line lengths so that each mussel was in approximately equal tension when the group was subsequently dislodged. Due to the increased force required to dislodge several mussels at once, we used a rigid, robust aluminum tripod to support the spring scale, and a winch to apply the normal force, FG, required to dislodge the group. We measured the width and height of the individuals within each group, calculated their planform areas, and summed these areas for use in calculating whole-group tenacity:<br />
TG(n)=FG(n)/sum(Ai)<br />
We repeated each measurement 20 times; that is, we sampled 20 individual bed mussels, 20 groups of two mussels, 20 groups of three mussels, etc.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1131038 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1131038
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1130095 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1130095
completed
Dr Mark W Denny
Stanford University - Hopkins
831-655-6207
Hopkins Marine Station 120 Ocean View Blvd.
Pacific Grove
CA
93950
USA
mwdenny@stanford.edu
pointOfContact
Dr Bengt J Allen
California State University Long Beach
562-985-7553
Department of Biological Sciences 1250 Bellflower Blvd.
Long Beach
CA
90840
USA
bengt.allen@csulb.edu
pointOfContact
asNeeded
Dataset Version: 2016-01-14
Unknown
num_muss
tenacity
comment
theme
None, User defined
count
No BCO-DMO term
comments
featureType
BCO-DMO Standard Parameters
Denny_2014
service
Deployment Activity
Rocky intertidal zone; Hopkins Marine Station, Pacific Grove, CA USA
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Environmental Variability, Functional Redundancy, and the Maintenance of Ecological Processes: Experiments in a Model Ecosystem
https://osprey.bco-dmo.org/project/489340
Environmental Variability, Functional Redundancy, and the Maintenance of Ecological Processes: Experiments in a Model Ecosystem
<p><em>From NSF award abstract:</em><br />
Functional traits of species are those that determine either species-specific responses to environmental conditions or their influence on ecological processes. Current theory suggests that communities with many species that perform a given function in a similar way but have different sensitivities to environmental conditions will exhibit greater temporal stability of ecosystem properties. So-called functional redundancy should lead to compensation among species, as some will do better when others do worse in response to environmental variability. Anthropogenic global warming is a major driver of current and anticipated changes in population dynamics, species interactions, and community structure from local to global scales. Resulting changes in biodiversity therefore have the potential to significantly alter important ecosystem properties such as productivity, nutrient cycling, and resistance to disturbance or invasion. Although ecologists have typically emphasized the response of populations and communities to changing climatic averages (e.g., increasing temperature and rainfall), global circulation models also predict significant increases in the intensity, frequency and duration of extreme weather and climate events in many parts of the world; that is, increases in the variability of the physical environment. Unfortunately, our current knowledge about the effects of increasing climatic variation on natural ecosystems is generally quite poor. Predicting how communities will likely respond to changing environmental variability has therefore been recognized as a critical research priority.</p>
<p>This project will advance our understanding of how projected changes in temperature variability will affect the behavior, demography, and interactions of key taxa on rocky shores, a model system for testing theoretical ecological predictions with field experiments. Environmental temperatures strongly influence the physiology, behavior, and demography of most organisms, and changes in average temperature have already been implicated in geographic range shifts of many species. A novel manipulative technique will be used to test the effects of changes in thermal variability on performance by a guild of congeneric grazing limpets, the productivity of their benthic microalgal food, and the resulting interaction strengths between the two taxa. Energy transfer among trophic levels is a key ecosystem process linked to local food-web support and rates of nutrient cycling. This research will evaluate not only species-specific effects of thermal variability on limpet survival, growth, and grazing activity, but also the potential for functional redundancy among limpet species to maintain that ecosystem function over time as environmental variability increases. Data generated from this study will provide a framework for future investigations of the consequences of climate change in this diverse and productive habitat.</p>
Experiments in a Model Ecosystem
largerWorkCitation
project
eng; USA
biota
oceans
Rocky intertidal zone; Hopkins Marine Station, Pacific Grove, CA USA
2016-01-14
Rocky intertidal zone; Hopkins Marine Station, Pacific Grove, CA USA
0
BCO-DMO catalogue of parameters from Experimental results describing the tenacity of byssal threads produced by mussels analyzed at Hopkins Marine Station during 2014 (Experiments in a Model Ecosystem project)
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/632658.rdf
Name: num_muss
Units: mussels
Description: <p>number of mussels in group</p>
http://lod.bco-dmo.org/id/dataset-parameter/632659.rdf
Name: tenacity
Units: newtons/mm2
Description: <p>tenacity or strength of threads: combined resistance of the area of bed occupied by a mussel all threads in the byssus divided by the area of bed occupied by a mussel</p>
http://lod.bco-dmo.org/id/dataset-parameter/632660.rdf
Name: comment
Units: unitless
Description: <p>whether record is a single tenacity measurement; the mean; standard deviation; count; or standard error</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2304
https://datadocs.bco-dmo.org/file/DwwxOB4iBwPqpg/muss_tenacity.csv
muss_tenacity.csv
Primary data file for dataset ID 632647
download
https://osprey.bco-dmo.org/dataset/632647/data/download
download
onLine
dataset
<p>Field measurements were performed in three separate beds of the California sea mussel, Mytilus californianus, in the rocky intertidal zone adjacent to Hopkins Marine Station, Pacific Grove, California. The beds comprised two layers of mussels: a basal layer attached to the rock and a surface layer attached to the basal layer. Measurements were conducted in summer and early autumn of 2008.</p>
<p><strong>Tenacity measurements:</strong><br />
We used the method of Denny (1987) to measure the attachment strength of individual bed mussels in the surface layer. We attached a recording spring scale to a mussel by placing a hook through a hole drilled in the exposed posterior lip of the shell. We then pulled the mussel evenly and swiftly perpendicular to the substratum (i.e., in the direction of lift) until it was dislodged. We divided the recorded force by the mussel’s planform area to calculate tenacity. Planform areas were estimated using shell height and width as the axes of an ellipse, which closely approximated the shape of mussels’ cross section. We measured shell height and width to the nearest millimeter using calipers. Sampled mussels were separated by at least 10 cm to ensure that each sample had no effect on subsequent samples.</p>
<p>We also tested groups of contiguous mussels in the surface layer. To pull multiple mussels simultaneously, we implemented an expansion of the procedure used to measure individuals. We attached groups of 2-6 contiguous mussels to a spring scale via hooks and lines, and adjusted line lengths so that each mussel was in approximately equal tension when the group was subsequently dislodged. Due to the increased force required to dislodge several mussels at once, we used a rigid, robust aluminum tripod to support the spring scale, and a winch to apply the normal force, FG, required to dislodge the group. We measured the width and height of the individuals within each group, calculated their planform areas, and summed these areas for use in calculating whole-group tenacity:<br />
TG(n)=FG(n)/sum(Ai)<br />
We repeated each measurement 20 times; that is, we sampled 20 individual bed mussels, 20 groups of two mussels, 20 groups of three mussels, etc.</p>
Specified by the Principal Investigator(s)
<p><strong>BCO-DMO Processing:</strong></p>
<p>- added conventional header with dataset name, PI name, version date<br />
- renamed parameters to BCO-DMO standard<br />
- replaced blank cells with nd (no data)</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Deployment: Denny_2014
Denny_2014
Hopkins Marine Station
laboratory
Denny_2014
Dr Mark W Denny
Stanford University - Hopkins
Hopkins Marine Station
laboratory