Results 21 to 30 of about 262,375 (207)

Trophic interactions of meso- and macrozooplankton and fish in the Iceland Sea as evaluated by fatty acid and stable isotope analysis [PDF]

, 2012
A trophic study was carried out in August of 2007 and 2008 on the pelagic ecosystem in the Subarctic Iceland Sea. Carbon and nitrogen stable isotopes and fatty acid biomarkers were used to study trophic linkages and the trophic ecology of the most ...
Falk Petersen, Stig, Gislason, Astthor, Petursdottir, Hildur   +2 more
core   +1 more source

Assessment of the Ecological Health of Afrotropical Rivers Using Fish Assemblages: A Case Study of Selected Rivers in the Lake Victoria Basin, Kenya

Frontiers in Water, 2021
Streams and rivers are globally threatened ecosystems because of increasing levels of exploitation, habitat degradation and other anthropogenic pressures.
Alfred O. Achieng, Frank O. Masese, Tracey J. Coffey, Phillip O. Raburu, Simon W. Agembe, Catherine M. Febria, Boaz Kaunda-Arara   +6 more
doaj   +1 more source

Investigation of spatiotemporal patterns in mean temperature and mean trophic level of MEDITS survey catches in the Mediterranean Sea

Scientia Marina, 2019
Mean temperature (MTC) and mean trophic level (MTL) spatiotemporal patterns of MEDITS survey catches were examined in 13 geographic statistical areas (GSAs) of the Mediterranean between 1994 and 2016.
Panagiota Peristeraki, Isabella Bitetto, Pierluigi Carbonara, Roberto Carlucci, Gregoire Certain, Francesco De Carlo, Michele Gristina, Nikos Kamidis, Paola Pesci, Marco Stagioni, María Valls, George Tserpes   +11 more
doaj   +1 more source

Risk Assessment and Characterization in Tuna Species of the Canary Islands According to Their Metal Content

Foods, 2023
Bioaccumulation is the process by which living organisms accumulate substances, such as pesticides, heavy metals, and other pollutants, from their environment.
Enrique Lozano-Bilbao, Indira Delgado-Suárez, Soraya Paz-Montelongo, Arturo Hardisson, José J. Pascual-Fernández, Carmen Rubio, Dailos González Weller, Ángel J. Gutiérrez   +7 more
doaj   +1 more source

Structural changes within trophic levels are constrained by within‐family assembly rules at lower trophic levels [PDF]

Ecology Letters, 2018
AbstractHistorical contingency broadly refers to the proposition that even random historical events can constrain the ecological and evolutionary pathways of organisms and that of entire communities. Focusing on communities, these pathways can be reflected into specific structural changes within and across trophic levels – how species interact with and
Song, Chuliang, Altermatt, Florian, Pearse, Ian, Saavedra Sanchez, Serguei   +3 more
openaire   +6 more sources

Reconstructing Pleistocene Australian herbivore megafauna diet using calcium and strontium isotopes

Royal Society Open Science, 2023
Isotopes in fossil tooth enamel provide robust tools for reconstructing food webs, which have been understudied in Australian megafauna. To delineate the isotopic composition of primary consumers and understand dietary behaviour at the base of the food ...
Dafne Koutamanis, Matthew McCurry, Theo Tacail, Anthony Dosseto   +3 more
doaj   +1 more source

Trophic signature of coral reef fish assemblages : towards a potential indicator of ecosystem disturbance [PDF]

, 2005
Face to the increasing anthropogenic disturbances that affect coral reef ecosystems, it becomes urgent to define appropriate ecological indicators for monitoring purposes.
Bozec, Yves-Marie, Chassot, E., Gascuel, D., Kulbicki, Michel   +3 more
core   +1 more source

Zooplankton and trophic status of Peipsi-Pihkva Lake

Трансформация экосистем, 2018
Long-term studies of the zooplankton of Chudsko-Pskovskoe (Peipsi-Pihkva) Lake have shown that the species composition and structure of the community correspond to those of eutrophic waters. Intensification of the eutrophication of the lake in the period
Anna V. Cherevichko
doaj   +1 more source

Food and feeding habits of the red mullet, Mullus barbatus (Actinopterygii: Perciformes: Mullidae), off the northern Tunisian coast (central Mediterranean) [PDF]

Acta Ichthyologica et Piscatoria, 2011
Background. The red mullet, Mullus barbatus L., is abundantly captured and targeted throughout the year in Tunisian waters but not all aspects of its biology have been studied well.
M. Chérif, M.M. Ben Amor, S. Selmi, H. Gharbi, H. Missaoui, C. Capapé   +5 more
doaj   +3 more sources

Isotopic fractionation and trophic position of zooplankton species in the Upper Paraná River floodplain Fracionamento isotópico e posição trófica de espécies zooplanctônicas da planície de inundação do alto rio Paraná

Brazilian Journal of Biology, 2011
This study aimed to evaluate the isotopic fractionation and trophic position of three zooplankton species (Notodiaptomus amazonicus, Moina minuta and Bosmina hagmanni) in the Upper Paraná River floodplain.
ARA Santana, E Benedito, C Ducatti, FA Lansac-Tôha   +3 more
doaj   +1 more source