Stable isotopes and morphology reveal spatial and annual patterns in trophic reliance of an invertivorous juvenile fish

2020 ◽  
Author(s):  
Taylor J. Senegal ◽  
Timothy M. Sesterhenn ◽  
Charles R. Roswell ◽  
Steven A. Pothoven ◽  
Tomas O. Höök
Keyword(s):  
Stable Isotopes ◽  
Juvenile Fish ◽  
Annual Patterns

Regional and inter annual patterns of heavy metals, organochlorines and stable isotopes in narwhals (Monodon monoceros) from West Greenland

2004 ◽  
Vol 331 (1-3) ◽  
pp. 83-105 ◽  
Author(s):  
R DIETZ ◽  
F RIGET ◽  
K HOBSON ◽  
M HEIDEJORGENSEN ◽  
P MOLLER ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Stable Isotopes ◽  
West Greenland ◽  
Monodon Monoceros ◽  
Annual Patterns

A stage 7 marine interglacial record (the Gr deland Interglacial) on J ren, southwestern Norway; foraminiferal, stable isotopes and amino acid evidence

Boreas ◽  
1999 ◽  
Vol 28 (2) ◽  
pp. 326-346
Author(s):  
Hans Petter Sejrup, Marianne Iversen, Ei
Keyword(s):  
Stable Isotopes ◽  
Amino Acid

Disentangling the role of shared ancestry and the environment on leaf stable isotopes

2019 ◽  
Author(s):  
Marko J. Spasojevic ◽  
Sören Weber1
Keyword(s):  
Stable Isotopes ◽  
Environmental Conditions ◽  
Evolutionary History ◽  
Environmental Control ◽  
Phylogenetic Signal ◽  
Individual Species ◽  
Habitat Types ◽  
Δ13c And Δ15n ◽  
Environmental Controls ◽  
Shared Ancestry

Stable carbon (C) and nitrogen (N) isotopes in plants are important indicators of plant water use efficiency and N acquisition strategies. While often regarded as being under environmental control, there is growing evidence that evolutionary history may also shape variation in stable isotope ratios (δ13C and δ15N) among plant species. Here we examined patterns of foliar δ13C and δ15N in alpine tundra for 59 species in 20 plant families. To assess the importance of environmental controls and evolutionary history, we examined if average δ13C and δ15N predictably differed among habitat types, if individual species exhibited intraspecific trait variation (ITV) in δ13C and δ15N, and if there were a significant phylogenetic signal in δ13C and δ15N. We found that variation among habitat types in both δ13C and δ15N mirrored well-known patterns of water and nitrogen limitation. Conversely, we also found that 40% of species exhibited no ITV in δ13C and 35% of species exhibited no ITV in δ15N, suggesting that some species are under stronger evolutionary control. However, we only found a modest signal of phylogenetic conservatism in δ13C and no phylogenetic signal in δ15N suggesting that shared ancestry is a weaker driver of tundra wide variation in stable isotopes. Together, our results suggest that both evolutionary history and local environmental conditions play a role in determining variation in δ13C and δ15N and that considering both factors can help with interpreting isotope patterns in nature and with predicting which species may be able to respond to rapidly changing environmental conditions.

LBA-ECO CD-02 CARBON, NITROGEN, OXYGEN STABLE ISOTOPES IN ORGANIC MATERIAL, BRAZIL

2010 ◽  
Author(s):  
J. BERRY, ◽  
C. COOK, ◽  
T.F. DOMINGUES, ◽  
J. EHLERINGER, ◽  
L. FLANAGAN, ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Organic Material ◽  
Oxygen Stable Isotopes

Discriminating trophic niches of carnivorous benthic macroinvertebrates with gut contents, stable isotopes, and fatty acids

2019 ◽  
Vol 631 ◽  
pp. 49-66 ◽  
Author(s):  
CA North ◽  
JR Lovvorn ◽  
JM Kolts ◽  
LW Cooper ◽  
JM Grebmeier
Keyword(s):  
Fatty Acids ◽  
Stable Isotopes ◽  
Benthic Macroinvertebrates ◽  
Gut Contents ◽  
Trophic Niches

Relationship between morphometrics and trophic levels in deep-sea fishes

2020 ◽  
Vol 637 ◽  
pp. 225-235 ◽  
Author(s):  
MA Ladds ◽  
MH Pinkerton ◽  
E Jones ◽  
LM Durante ◽  
MR Dunn
Keyword(s):  
Stable Isotopes ◽  
Trophic Level ◽  
Deep Sea ◽  
Strong Relationship ◽  
Ecosystem Model ◽  
Trophic Levels ◽  
Fish Size ◽  
Wide Range ◽  
Gape Size ◽  
Morphological Variables

Marine food webs are structured, in part, by predator gape size. Species found in deep-sea environments may have evolved such that they can consume prey of a wide range of sizes, to maximise resource intake in a low-productivity ecosystem. Estimates of gape size are central to some types of ecosystem model that determine which prey are available to predators, but cannot always be measured directly. Deep-sea species are hypothesized to have larger gape sizes than shallower-water species relative to their body size and, because of pronounced adaptive foraging behaviour, show only a weak relationship between gape size and trophic level. Here we present new data describing selective morphological measurements and gape sizes of 134 osteichthyan and chondrichthyan species from the deep sea (200-1300 m) off New Zealand. We describe how gape size (height, width and area) varied with factors including fish size, taxonomy (class and order within a class) and trophic level estimated from stable isotopes. For deep-sea species, there was a strong relationship between gape size and fish size, better predicted by body mass than total length, which varied by taxonomic group. Results show that predictions of gape size can be made from commonly measured morphological variables. No relationship between gape size and trophic level was found, likely a reflection of using trophic level estimates from stable isotopes as opposed to the commonly used estimates from FishBase. These results support the hypothesis that deep-sea fish are generalists within their environment, including suspected scavenging, even at the highest trophic levels.

Variability in polar bear Ursus maritimus stable isotopes in relation to environmental change in the Canadian Beaufort Sea

2019 ◽  
Vol 630 ◽  
pp. 215-225 ◽  
Author(s):  
N Boucher ◽  
AE Derocher ◽  
ES Richardson
Keyword(s):  
Stable Isotopes ◽  
Environmental Change ◽  
Polar Bear ◽  
Beaufort Sea ◽  
Ursus Maritimus

Intra-seasonal and inter-annual patterns in the demographics of sand lance and response to environmental drivers in the North Pacific

2019 ◽  
Vol 617-618 ◽  
pp. 221-244 ◽  
Author(s):  
MR Baker ◽  
ME Matta ◽  
M Beaulieu ◽  
N Paris ◽  
S Huber ◽  
...  
Keyword(s):  
North Pacific ◽  
Environmental Drivers ◽  
Sand Lance ◽  
The North ◽  
The North Pacific ◽  
Annual Patterns
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