Results 11 to 20 of about 28,193 (230)
On the evolution of trophic position. [PDF]
Ecol Lett, 2021 Abstract The trophic structure of food webs is primarily determined by the variation in trophic position among species and individuals. Temporal dynamics of food web structure are central to our understanding of energy and nutrient fluxes in changing environments, but little is known about how evolutionary processes shape trophic ...
Moosmann M +6 more
europepmc +7 more sources
Different trophic positions among social vespid species revealed by stable isotopes
Royal Society Open Science, 2021 The social vespid wasps are common insect predators and several species behave in unison in the same biotopes. It is commonly accepted that social wasps are mainly opportunistic generalist predators without differences in prey selection and hence they ...
Jyrki Torniainen, Atte Komonen
doaj +5 more sources
Cenozoic megatooth sharks occupied extremely high trophic positions [PDF]
Science Advances, 2022 Trophic position is a fundamental characteristic of animals, yet it is unknown in many extinct species. In this study, we ground-truth the 15 N/ 14 N ratio of enameloid-bound organic matter (δ 15 N EB ) as a trophic level proxy by comparison to ...
Kast, Emma R. +17 more
openaire +6 more sources
The microbial contribution to the trophic position of stomiiform fishes [PDF]
ICES Journal of Marine Science, 2021 Abstract The trophic position (TP) of fishes determines their importance in terms of energy flows within food webs. However, accurate estimations of TP are often prevented because of the difficulties in tracing all food sources. This is particularly challenging for omnivorous fishes, such as those from the Order Stomiiformes.
Antonio Bode +3 more
openaire +4 more sources
Predator Diet and Trophic Position Modified with Altered Habitat Morphology. [PDF]
PLoS One, 2016 Empirical patterns that emerge from an examination of food webs over gradients of environmental variation can help to predict the implications of anthropogenic disturbance on ecosystems. This "dynamic food web approach" is rarely applied at the coastal margin where aquatic and terrestrial systems are coupled and human development activities are often ...
Tewfik A, Bell SS, McCann KS, Morrow K.
europepmc +6 more sources
The trophic position of dead autochthonous organic material and its treatment in trophic analyses [PDF]
Environmental Modeling & Assessment, 1997 1. The importance of the recycling of organic matter for the overall carbon and nutrient flow in a food web, e.g., by the microbial loop has been recognized for pelagic and other ecosystems during the last decade. In contrast, analyses of the trophic food web structure conducted, e.g., by network analysis based on mass-balanced flow diagrams (i.e ...
Gaedke, Ursula, Straile, Dietmar
openaire +2 more sources
Body size is negatively correlated with trophic position among cyprinids. [PDF]
R Soc Open Sci, 2016 Body size has many ecological and evolutionary implications that extend across multiple levels of organization. Body size is often positively correlated with species traits such as metabolism, prey size and trophic position (TP) due to physiological and mechanical constraints. We used stable isotope analysis to quantify TP among minnows across multiple
Burress ED +3 more
europepmc +5 more sources
Stable Isotopes Reveal Trophic Relationships and Diet of Consumers in Temperate Kelp Forest and Coral Reef Ecosystems [PDF]
Oceanography, 2013 We explored the use of stable nitrogen (N) isotope analysis to assess trophic position of consumers in two marine ecosystems: the kelp forests of southern California and a coral atoll in the tropical Pacific.
Henry M. Page +7 more
doaj +1 more source
Frontiers in Marine Science, 2022 The trophic position concept is central in system ecology, and in this study, trophic position (TP) estimates from stable-isotopes and an Ecopath mass-balance food web model for the Barents Sea were compared. Two alternative models for estimating TP from
Torstein Pedersen
doaj +1 more source
Frontiers in Marine Science, 2021 Trawl fisheries have been shown to cause overfishing and destruction of benthic habitats in the seabed. To mitigate these impacts, a trawling ban has been enforced in Hong Kong waters since December 31, 2012 to rehabilitate the ecosystem and enhance ...
Lily S. R. Tao +8 more
doaj +1 more source