Trophic Structure

Food Webs in Major Habitats of PIE






















Conceptual model of nitrogen flow through the biota of the upper Parker River estuary, showing trophic linkages supported by stable isotopic evidence, feeding ecology, and habitat use. Dashed arrows indicate suspected pathways. (Hughes et. al. 2000).
















Species of the Parker-Rowley River Estuary food web collected during summer 1993-1995 and regions of the estuary where they were present.  Multiple stable isotope analysis (13C, 15N, 34S) was used to evaluate food web connections and trophic position.  All fish are young of the year (Deegan and Garritt, 1997).