Fig 1.
Study area located on the Pernambuco coast in northeast Brazil.
The Sirinhaém area, located on the Pernambuco coast in northeast Brazil. Depth was obtained from [63].
Table 1.
Stable isotopes compositions of basal sources and consumers.
Fig 2.
Biplot of carbon and nitrogen for basal sources and consumers.
Biplot of δ13C (‰) and δ15N (‰) values (mean ± SD) for basal sources (grey circles) and consumers (invertebrates and fishes) sampled off the Sirinhaém coast, northeastern Brazil. The dendrogram inserted in the right corner is from agglomerative hierarchical clustering (AHC) for 25 consumers representing the trophic groups, indicated by colours, where each node represents an individual species. Species abbreviations are: Sedimentary organic matter (SOM), Lobophora variegata (lob.var), Gracilaria cervicorni (gra.cer), Sargassum sp.(sar.sp), Particulate organic matter (POM), Zooplankton–(zoo), Penaeus subtilis (pen.sub), Penaeus schmitti (pen.sch), Callinectes danae (cal.dan), Callinectes ornatus (cal.orn), Xiphopenaeus kroyeri (xip.kro), Lolliguncula brevis (lol.bre), Citharichthys spilopterus (cit.spi), Diapterus auratus (dia.aur), Opisthonema oglinum (opi.ogl), Symphurus tessellatus (sym.tes), Diapterus rhombeus (dia.rho), Lutjanus synagris (lut.syn), Bairdiella ronchus (bai.ron), Chirocentrodon bleekerianus (chi.ble), Eucinostomus argenteus (euc.arg), Bagre bagre (bag.bag), Caranx hippos (car.hip), Micropogonias furnieri (mic.fur), Bagre marinus (bag.mar), Larimus breviceps (lar.bre), Stellifer microps (ste.mic), Isopisthus parvipinnis (iso.par), Conodon nobilis (con.nob) and Paralonchurus brasiliensis (par.bra).
Table 2.
Weight contribution (%) of each prey group in the diet of consumers off the Sirinhaém coast, northeastern Brazil.
Fig 3.
Heatmap of the diet proportion among consumers and prey.
The dendrograms inserted in the corners were made with agglomerative hierarchical clustering (AHC) based on diet proportion by stomach content data (left) and isotope composition data (right) off the Sirinhaém coast, northeastern Brazil. The grey boxes represent different groups based on stomach content data. Consumer abbreviations are given in Table 1 and colours based on clustering by isotope composition data. Acronyms for each prey are: Det–Detritus; Phy–Phytoplankton; Zoo–Zooplankton; Cra–Crab; Shr–Shrimp; Wor–Worm; Mol–Mollusc; Oth.cru—Other crustaceans and Fis–Fish.