scholarly journals Ontogenetic niche shifts and resource partitioning of lake trout morphotypes

2009 ◽  
Vol 66 (6) ◽  
pp. 1007-1018 ◽  
Author(s):  
Mara S. Zimmerman ◽  
Stephanie N. Schmidt ◽  
Charles C. Krueger ◽  
M. Jake Vander Zanden ◽  
Randy L. Eshenroder
Keyword(s):  
Stable Isotope ◽  
Resource Partitioning ◽  
Lake Trout ◽  
Niche Partitioning ◽  
Ontogenetic Changes ◽  
Large Lakes ◽  
Isotope Data ◽  
Ontogenetic Niche Shifts ◽  
Niche Shifts ◽  
Stable Isotope Data

Resource polymorphisms are widely observed in fishes; however, ontogenetic contributions to morphological and ecological differences are poorly understood. This study examined whether ontogenetic changes in niche partitioning could explain morphological and buoyancy differences between lake trout ( Salvelinus namaycush ) morphotypes in Great Slave Lake (Northwest Territories, Canada). Morphometric analysis, buoyancy, capture depth, diet, and stable isotope data were used in concert to determine whether (i) differences occur in small, as well as large, lake trout, (ii) ontogenetic changes in morphology and buoyancy correlate with shifts in depth or diet, and (iii) a subset of small trout, putatively identified as “humpers”, are distinct from other morphotypes. Ontogenetic changes in lake trout morphology were associated with an ecological shift between benthic and pelagic feeding. Resource partitioning between lean and siscowet-like trout occurred within benthic (small trout) and pelagic (large trout) habitats. The humper subset did not differ from small siscowet-like trout. By combining multiple methods and an ontogenetic perspective, our study provides novel perspectives on resource polymorphisms in large, deep lakes and on existing interpretations of stable isotope data from large lakes in general.

scholarly journals Integrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (Cyanistes caeruleus)

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Christopher J. Pollock ◽  
Pablo Capilla-Lasheras ◽  
Rona A. R. McGill ◽  
Barbara Helm ◽  
Davide M. Dominoni
Keyword(s):  
Stable Isotope ◽  
Breeding Success ◽  
Cyanistes Caeruleus ◽  
Isotope Data ◽  
Blue Tits ◽  
Stable Isotope Data

Contribution of recycled moisture to precipitation in the monsoon marginal zone: Estimate based on stable isotope data

2019 ◽  
Vol 569 ◽  
pp. 423-435 ◽  
Author(s):  
Guofeng Zhu ◽  
Huiwen Guo ◽  
Dahe Qin ◽  
Hanxiong Pan ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Marginal Zone ◽  
Isotope Data ◽  
Stable Isotope Data

scholarly journals Increasing the Research Value of Digitized Fossil Museum Specimens via Integrated Stable Isotope Data

2018 ◽  
Vol 2 ◽  
Author(s):  
Sean Moran ◽  
Bruce MacFadden ◽  
Michelle Barboza
Keyword(s):  
Stable Isotope ◽  
Data Sets ◽  
Museum Specimens ◽  
Ancillary Data ◽  
Deep Time ◽  
Aggregated Data ◽  
Isotope Data ◽  
The Status ◽  
The Individual ◽  
Stable Isotope Data

Over the past several decades, thousands of stable isotope analyses (δ13C, δ18O) published in the peer-reviewed literature have advanced understanding of ecology and evolution of fossil mammals in Deep Time. These analyses typically have come from sampling vouchered museum specimens. However, the individual stable isotope data are typically disconnected from the vouchered specimens, and there likewise is no central repository for this information. This paper describes the status, potential, and value of the integration of stable isotope data in museum fossil collections. A pilot study in the Vertebrate Paleontology collection at the Florida Museum of Natural History has repatriated within Specify more than 1,000 legacy stable isotope data (mined from the literature) with the vouchered specimens by using ancillary non Darwin Core (DwC) data fields. As this database grows, we hope to both: validate previous studies that were done using smaller data sets; and ask new questions of the data that can only be addressed with larger, aggregated data sets. validate previous studies that were done using smaller data sets; and ask new questions of the data that can only be addressed with larger, aggregated data sets. Additionally, we envision that as the community gains a better understanding of the importance of these kinds of ancillary data to add value to vouchered museum specimens, then workflows, data fields, and protocols can be standardized.

Ontogenetic Niche Shifts, Predators, and Coexistence among Consumer Species

2013 ◽  
Author(s):  
André M. de Roos ◽  
Lennart Persson
Keyword(s):  
Alternative Stable States ◽  
Niche Partitioning ◽  
Stage Structure ◽  
Stable States ◽  
Stable Coexistence ◽  
Ontogenetic Niche Shifts ◽  
Niche Shifts ◽  
Ontogenetic Niche ◽  
Dependent Growth ◽  
Equal Population

This chapter considers how stage structure and ontogenetic niche shifts may affect the coexistence between two consumer species competing for two resources in the absence and presence of predators, and how ontogenetic niche shifts may give rise to alternative stable states. More specifically, the analysis will use techniques developed within the consumer-resource framework of Tilman (1982), including consumption and renewal vectors (Schellekens, de Roos, and Persson 2010). Tilman showed that stable coexistence between consumers feeding on the same two resources is possible if each consumer species feeds proportionally more on the resource that limits its own growth most. Stable coexistence is, however, also affected by the form of resource-dependent growth isoclines, which represent combinations of resource densities that lead to equal population growth of consumers. It is shown that ontogenetic niche shifts per se affect the form of resource-dependent growth isoclines, which in turn may lead to coexistence through niche partitioning. The chapter also discusses how predation may promote the performance of a species undergoing ontogenetic niche shifts even in the case where it is both the inferior competitor and the preferred prey of the predator.

Using stable isotope data to advance marine food web modelling

2019 ◽  
Vol 29 (2) ◽  
pp. 277-296 ◽  
Author(s):  
Stacey A. McCormack ◽  
Rowan Trebilco ◽  
Jessica Melbourne-Thomas ◽  
Julia L. Blanchard ◽  
Elizabeth A. Fulton ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Food Web ◽  
Marine Food Web ◽  
Isotope Data ◽  
Marine Food ◽  
Stable Isotope Data
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