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We have found 3,452 datasets for the keyword " food-web dynamics". You can continue exploring the search results in the list below.
Datasets: 106,091
Contributors: 42
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3,452 Datasets, Page 1 of 346
Food & Bio Product Warehousing & Distribution Services App
Web app showing locations of Manitoba companies that offer food and bio product warehousing and distribution services.This web application shows the geographical locations of Manitoba companies that offer food and bio product warehousing and distribution services. This list is not inclusive nor an endorsement for services. For more information, visit Manitoba Agriculture. This app uses the Manitoba Food & Bio Product Warehousing & Distribution Services feature layer and the Manitoba Food & Bio Product Warehousing & Distribution Services Map.
Tracing carbon flow and trophic structure of a coastal Arctic marine food web using highly branched isoprenoids and carbon, nitrogen and sulfur stable isotopes
PURPOSE:In this study, we examined the structure and function of the Southampton Island marine food web across 149 species of benthic and pelagic invertebrates, fishes, marine mammals and seabirds collected from 2016 to 2019, to provide a baseline for future studies that aim to quantify temporal changes in food web structuring. More specifically,we used a multi-biomarker approach combining stable isotopes and HBIs to: (i) determine the vertical trophic structure of the marine food web, (ii) investigate the contribution of benthic and pelagic-derived prey to the higher trophic level species of the Arctic food web, and (iii) determine the role of ice algae and phytoplankton carbon source use across different trophic levels and compartments (pelagic and benthic). By shedding new light on the functioning of the Southampton Island food web and specifically how the contribution of ice algae and benthic habitat shapes its structure, these results will be relevant to adaptive management and conservation initiatives implemented in response to anthropogenic stressors and climate change. DESCRIPTION:Climate-driven alterations of the marine environment are most rapid in Arctic and subarctic regions, including Hudson Bay in northern Canada, where declining sea ice, warming surface waters and ocean acidification are occurring at alarming rates. These changes are altering primary production patterns that will ultimately cascade up through the food web. Here, we investigated (i) the vertical trophic structure of the Southampton Island marine ecosystem in northern Hudson Bay, (ii) the contribution of benthic and pelagic-derived prey to the higher trophic level species, and (iii) the relative contribution of ice algae and phytoplankton derived carbon in sustaining this ecosystem. For this purpose, we measured bulk stable carbon, nitrogen and sulfur isotope ratios as well as highly branched isoprenoids in samples belonging to 149 taxa, including invertebrates, fishes, seabirds and marine mammals. We found that the benthic invertebrates occupied 4 trophic levels and that the overall trophic system went up to an average trophic position of 4.8. The average δ34S signature of pelagic organisms indicated that they exploit both benthic and pelagic food sources, suggesting there are many interconnections between these compartments in this coastal area. The relatively high sympagic carbon dependence of Arctic marine mammals (53.3 ± 22.2 %) through their consumption of benthic invertebrate prey, confirms the important role of the benthic subweb for sustaining higher trophic level consumers in the coastal pelagic environment. Therefore, a potential decrease in the productivity of ice algae could lead to a profound alteration of the benthic food web and a cascading effect on this Arctic ecosystem.Collaborators:Centre for Earth Observation Science, University of Manitoba, Winnipeg, Manitoba, Canada - R´emi Amiraux, C.J. Mundy, Jens K. Ehn, Z.A. Kuzyk.Quebec-Ocean, Sentinel North and Takuvik, Biology Department, Laval University, Quebec, Quebec, Canada - Marie Pierrejean.Scottish Association for Marine Science, Oban, UK - Thomas A. Brown.Department of Natural Resource Sciences, McGill University, Ste. Anne de Bellevue, Quebec, Canada - Kyle H. Elliott.Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada - Steven H. Ferguson, Cory J.D. Matthews, Cortney A. Watt, David J. Yurkowski.School of the Environment, University of Windsor, Windsor, Ontario, Canada - Aaron T. Fisk.Science and Technology Branch, Environment and Climate Change Canada, Ottawa, Ontario, Canada - Grant Gilchrist.College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Fairbanks, AK, USA - Katrin Iken.Department of Earth Sciences, University of New Brunswick, Fredericton, NB, Canada - Audrey Limoges.Department of Integrative Biology, University of Windsor, Windsor, Ontario, Canada - Oliver P. Love, Wesley R. Ogloff.Department of Arctic Biology, The University Centre in Svalbard, Longyearbyen, Norway - Janne E. Søreide.
Manitoba agri-food by-products
A web application that shows the location of businesses in Manitoba that offer agri-food by-products or related services.This web application shows the geographic location of Manitoba businesses that offer agri-food by-products or related services. This list is not exhaustive and does not constitute a recommendation for services. For more information, visit the Manitoba Agriculture website. Contact Manitoba Agriculture at agindustrydev@gov.mb.ca if you want your business listed. This web application uses the point element layer from the Manitoba Agri-Food By-Product Directory and the Manitoba Agri-Food By-Product Map.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**
Application of food and bioproduct storage and distribution services
A web application that shows the location of businesses in Manitoba that offer food and bioproducts storage and distribution services.This web application shows the geographic location of Manitoba businesses that offer food and bioproducts storage and distribution services. This list is not exhaustive and does not constitute a recommendation for services. For more information, visit the Manitoba Agriculture website. This application uses the food and bioproducts warehousing and distribution services element layer and the Manitoba food and bioproducts storage and distribution services map.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**
Food Ingredient & Product Directory
Web app showing locations of Manitoba Agri-Food businesses that offer food ingredients and/or products.This application shows the geographical locations of Manitoba Agri-Food businesses that offer food ingredients and/or products. This list is not inclusive nor an endorsement for services. For more information, visit Manitoba Agriculture. Contact Manitoba Agriculture at mbagrifood@gov.mb.ca to have your business added to the listing. This app uses the Food Ingredient & Product Data feature layer and the Food Ingredient & Product Map.
Food Banks
Food Banks is a point dataset identifying food banks in British Columbia.
Directory of ingredients and food products
A web application that shows the location of agri-food businesses in Manitoba that offer ingredients or food products.This application shows the geographic location of agri-food businesses in Manitoba that offer food ingredients or products. This list is not exhaustive and does not constitute a recommendation for services. For more information, visit the Manitoba Agriculture website. Contact Manitoba Agriculture at mbagrifood@gov.mb.ca if you want your business to be on the list. This application uses the element layer of the Ingredients and Food Product Data and the Food Ingredients and Products Map.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**
Escalating EnforcementCSV
Displays the levels of escalating enforcement applied by health officers to enforce the Manitoba Food and Food Handling Establishment Regulations when food safety violations are not corrected in the prescribed period of timeThis table displays the frequency in which health officers applied escalating levels of enforcement to food processors who did not correct food safety violations in the prescribed amount of time indicated in the inspection. Food processors are given a period of time to correct food safety violations based on the associated risk to food safety. Escalating enforcement is only applied if the violation is not corrected in the prescribed period of time. This table was created by the Food Safety and Inspection Branch - Agriculture and Resource Development department.Field Names (Field Alias): Field description. Period (Period):The period for which the data was collected. Either quarterly or yearly. Year (Year): The specific year of the previously mentioned data collection period. Date (Date): The dates of the calendar year in which the data was collected during a period. Enforcement_Type (Enforcement Type): The individual levels of escalating enforcement applied by health officers. The values for this field are "Warning letter", "Verbal warning", "Offence notice issued", "Closure orders issued", "Suspensions", "Products seized and destroyed", "Products seized and held". Total (Total): the number of occurrences a level of escalating enforcement was applied in a period.
Manitoba Agri-Food By-Products
Web application showing locations of Manitoba companies that offer agri-food by-products and/or related services.This web application shows the geographical locations of Manitoba companies that offer agri-food by-products and/or related services. This list is not inclusive nor an endorsement for services. For more information, visit Manitoba Agriculture. Contact Manitoba Agriculture at agindustrydev@gov.mb.ca to have your business added to the listing. This app uses the Manitoba Agri-Food By-Product Directory feature layer and the Manitoba Agri-Food By-Product Map.
Farmers’ Markets
This dataset displays the name, website and locations of Ontario Farmers Markets, as derived from the Farmers Markets of Ontario Website. The 2 datasets available below are zipped files containing: * .kmz files for use with Google Earth or similar Keyhole Markup Language (KML) compatible software * shapefiles for use with GIS software For instructions on how to use Google Earth, read the [Google Earth tutorial](http://www.google.com/earth/index.html).
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