This dataset contains information about the pairwise food web relationships between three trophic groups in montane deciduous forest in Western Sichuan, China: (i) Chinese tree species in the family Fagaceae; (ii) herbivorous Cynipid gallwasps (Hymenoptera: Cynipidae: Cynipini) collected from the tree species; & (iii) parasitoid wasps reared from the Cynipid galls. The records are for samples collected between November 2017 and June 2022 from two sites (Emeishan and Mianning) in Sichuan Province. The dataset contains 9 tables: Three are tables of relationships between galls and trees, at each of Emeishan and Mianning, and for both sites combined. Three are tables of relationships between parasitoids and trees, at Emeishan, Mianning, and for both sites combined. And three are tables of relationships between galls and parasitoids, at Emeishan, Mianning, and for both sites combined. The data were collected during individual tree-level surveys funded by a NERC Discovery grant (NE/T000120/1): ‘TRICOMM: Structure, assembly and evolution of natural tritrophic communities’. Full details about this dataset can be found at https://doi.org/10.5285/b5455ff8-81c3-4c9f-b2d2-6ff1a0db9951

The dataset contains 3 data files. Firstly, it contains one set of stable isotope compositions expressed as delta13C, d15N, d34S values recovered from fish muscle from a variety of species captured in September 2019 across the Barents Sea as part of the joint IMR-PINRO Barents Sea Ecosystem Survey. Samples were collected by Dr Matthew Cobain and Dr Kim Vane, and isotope data analysed at the university of Southampton. A second dataset contains delta13C and delta18O compositions of fish otolith carbonate recovered from a subset of the same fish. A final sheet contains the full metadata associated with each fish sampled on the survey. All samples were processed by Dr Matthew Cobain or Prof Clive Trueman and stable isotope values determined at the University of Southampton. Funding: Project was funded under the NERC Changing Arctic Ocean project, Coldifsh (NE/R012520/1).

This dataset comprises conventional stomachs contents data for the biomass-dominant species of mesopelagic fish, particularly myctophid fish (Family Myctophidae) in the Scotia Sea. The data were collected by depth-discrete RMT25 net trawls deployed between 0-1000 m between the Antarctic Polar Front and the South Orkney Islands. Samples were collected repeatedly at nominal sampling stations during austral autumn 2004, spring 2006, summer 2008 and autumn 2009 for analyses examining the trophodynamics of Southern Ocean mesopelagic fish and their role in the food web. The data are the quantitative measures of diet composition (prey abundance, frequency and mass) observed from microscope analyses of individual fish stomachs per species.