scholarly journals A meta-collection of nitrogen stable isotope data measured in Arctic marine organisms from the Canadian Beaufort Sea, 1983–2013

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Ashley Ehrman ◽  
Carie Hoover ◽  
Carolina Giraldo ◽  
Shannon A. MacPhee ◽  
Jasmine Brewster ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Continental Shelf ◽  
Food Web ◽  
Isotope Ratios ◽  
Marine Organisms ◽  
The Arctic ◽  
Stable Isotope Ratios ◽  
Food Web Structure ◽  
Web Structure ◽  
Shelf Region

Abstract Objectives Existing information on Arctic marine food web structure is fragmented. Integrating data across research programs is an important strategy for building a baseline understanding of food web structure and function in many Arctic regions. Naturally-occurring stable isotope ratios of nitrogen (δ15N) and carbon (δ13C) measured directly in the tissues of organisms are a commonly-employed method for estimating food web structure. The objective of the current dataset was to synthesize disparate δ15N, and secondarily δ13C, data in the Canadian Beaufort continental shelf region relevant to trophic and ecological studies at the local and pan-Arctic scales. Data description The dataset presented here contains nitrogen and carbon stable isotope ratios (δ15N, δ13C) measured in marine organisms from the Canadian Beaufort continental shelf region between 1983 and 2013, gathered from 27 published and unpublished sources with associated sampling metadata. A total of 1077 entries were collected, summarizing 8859 individual organisms/samples representing 333 taxa across the Arctic food web, from top marine mammal predators to primary producers.

Long-term variation in isotopic baselines and implications for estimating consumer trophic niches

2008 ◽  
Vol 65 (10) ◽  
pp. 2191-2200 ◽  
Author(s):  
Christopher T. Solomon ◽  
Stephen R. Carpenter ◽  
James A. Rusak ◽  
M. Jake Vander Zanden
Keyword(s):  
Stable Isotope ◽  
Food Web ◽  
Isotope Ratios ◽  
Trophic Niche ◽  
Accurate Estimation ◽  
Stable Isotope Ratios ◽  
Turnover Rates ◽  
C And N ◽  
Trophic Niches

Carbon and nitrogen stable isotope ratios are increasingly used to study long-term food web change. Temporal variation at the base of the food web may impact the accuracy of trophic niche estimates, but data describing interannual baseline variation are limited. We quantified baseline variation over a 23-year period in a north-temperate lake and used a simulation model to examine how this variation might affect consumer trophic niche estimates. Interannual variation in C and N stable isotope ratios was significant for both benthic and pelagic primary consumer baselines. Long-term linear trends and shorter-term autoregressive patterns were apparent in the data. There were no correlations among benthic and pelagic C and N baselines. Simulations demonstrated that error in estimated fish trophic niches, but not bias, increased substantially when sampling of baselines was incomplete. Accurate trophic niche estimates depended more on accurate estimation of baseline time series than on accurate estimation of growth and turnover rates. These results highlight the importance of previous and continued efforts to constrain bias and error in long-term stable isotope food web studies.

Stable isotope analyses revealed high seasonal dynamics in the food web structure of a peatbog

2015 ◽  
Vol 100 (5-6) ◽  
pp. 141-150 ◽  
Author(s):  
Tomasz Mieczan ◽  
Niedźwiecki Michał ◽  
Małgorzata Adamczuk ◽  
Irena Bielańska-Grajner
Keyword(s):  
Stable Isotope ◽  
Food Web ◽  
Seasonal Dynamics ◽  
Food Web Structure ◽  
Stable Isotope Analyses ◽  
Web Structure ◽  
Isotope Analyses

Food web structure of a shallow eutrophic lake (Lake Taihu, China) assessed by stable isotope analysis

Hydrobiologia ◽  
2011 ◽  
Vol 683 (1) ◽  
pp. 173-183 ◽  
Author(s):  
Zhigang Mao ◽  
Xiaohong Gu ◽  
Qingfei Zeng ◽  
Luhong Zhou ◽  
Mingbo Sun
Keyword(s):  
Stable Isotope ◽  
Food Web ◽  
Stable Isotope Analysis ◽  
Lake Taihu ◽  
Isotope Analysis ◽  
Eutrophic Lake ◽  
Food Web Structure ◽  
Web Structure ◽  
Shallow Eutrophic Lake

Food web structure prior to and following construction of artificial reefs, based on stable isotope analysis

2020 ◽  
Vol 37 ◽  
pp. 101354 ◽  
Author(s):  
Zhipeng Zhang ◽  
Mingqi Wang ◽  
Jingjing Song ◽  
Wenxi Zhao ◽  
Daode Yu ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Food Web ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Artificial Reefs ◽  
Food Web Structure ◽  
Web Structure

Reconstructing variability in West Greenland ocean biogeochemistry and bowhead whale (Balaena mysticetus) food web structure using amino acid isotope ratios

Polar Biology ◽  
2017 ◽  
Vol 40 (11) ◽  
pp. 2225-2238 ◽  
Author(s):  
Corinne Pomerleau ◽  
Mads Peter Heide-Jørgensen ◽  
Steven H. Ferguson ◽  
Harry L. Stern ◽  
Jacob L. Høyer ◽  
...  
Keyword(s):  
Amino Acid ◽  
Food Web ◽  
Isotope Ratios ◽  
Bowhead Whale ◽  
Balaena Mysticetus ◽  
Food Web Structure ◽  
West Greenland ◽  
Web Structure ◽  
Ocean Biogeochemistry

scholarly journals Benthic biodiversity and food web structure in the European sector of the Arctic Ocean during spring time

2018 ◽  
Author(s):  
Barbara Oleszczuk ◽  
Katarzyna Grzelak ◽  
Monika Kędra
Keyword(s):  
Sea Ice ◽  
Food Web ◽  
Barents Sea ◽  
Benthic Communities ◽  
Trophic Levels ◽  
The Arctic ◽  
Feeding Guild ◽  
Food Web Structure ◽  
Web Structure ◽  
Ice Conditions

Arctic marine ecosystems are currently facing sea ice decrease. Changes in the sea ice cover will influence the Organic Matter (OM) fluxes to the bottom and thus benthic communities. We aimed to examine meio- and macrobenthic biodiversity and community structure, and food web, with use of stable isotopes of carbon (δ13C) and nitrogen (δ15N), in relation to depth, sea ice type, and bloom stage. Benthic samples were collected in Svalbard area during spring time in 2015 and 2016 along with samples of particulate and sediment OM. Svalbard fjords, Storfjorden, Barents Sea shelf, continental slope, and Nansen Basin were characterized by different environmental settings including various sea ice conditions, bloom stage, sediment OM and particulate OM in bottom water. The highest biodiversity and biomass were found at the shelf and slope stations where intensive bloom was observed and was related to higher concentrations of fresh, high-quality OM. Low benthic infaunal diversity, abundance, and biomass were noted in fjords and deep stations where quality and quantity of OM was markedly lower. Deposit feeders were the only feeding guild sampled in the deep stations while at other stations 3-4 trophic levels were found.

scholarly journals Preliminary examination of food web structure of Nicola Lake (Taim Hydrological System, south Brazil) using dual C and N stable isotope analyses

2006 ◽  
Vol 4 (2) ◽  
pp. 279-284 ◽  
Author(s):  
Alexandre M. Garcia ◽  
David J. Hoeinghaus ◽  
João P. Vieira ◽  
Kirk O. Winemiller ◽  
David M. L. Motta Marques ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Food Web ◽  
Biological Diversity ◽  
Isotope Analysis ◽  
Carbon Sources ◽  
Stable Isotope Ratio ◽  
Trophic Levels ◽  
Food Web Structure ◽  
Web Structure ◽  
Hydrological System

Taim Ecological Reserve is located within the Taim Hydrological System and was created to protect a heterogeneous and productive landscape harboring exceptional biological diversity in southern Brazil. Using stable isotope ratio analyses of carbon (delta13C) and nitrogen (delta15N), we provide a preliminary description of the food web structure, including estimates of production sources supporting fish populations and vertical trophic structure, within a representative lake of this system. A total of 21 organisms (5 macrophytes, 3 mollusks and 13 adult fishes) representing 16 species were collected for isotope analysis. Fishes had delta13C values ranging from -24.30º/oo to -28.31º/oo , showing concordance with the range of values observed for macrophytes (-25.49 to -27.10º/oo), and suggesting that these plants could be a major carbon source supporting these fishes. delta13C signatures of Corbicula (-30.81º/oo) and Pomacea (-24.26º/oo) indirectly suggest that phytoplankton and benthic algae could be alternative carbon sources for some consumers. Nitrogen isotope ratios indicated approximately three consumer trophic levels. The pearl cichlid Geophagus brasiliensis was a primary consumer. Two catfishes (Trachelyopterus lucenai and Loricariichthys anus) were secondary consumers. Two congeneric pike cichclids (Crenicichla lepidota and C. punctata), a catfish (Pimelodus maculatus) and the characids Astyanax fasciatus and Oligosarcus robustus were tertiary consumers. Further studies including additional primary producers and consumers and greater sample numbers should be conducted to provide a more complete and detailed description of food web structure and dynamics within the reserve.

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