“…In contrast, the sparse, open canopy of redgums favours a more diverse understorey of littoral macrophytes and terrestrial plants, and their propensity to drop limbs provides fallen wood as habitat for animals. Their leaves are lignified, however, and contain high levels of tannins (Campbell and Fuchshuber, 1995) that are toxic to some animals, including certain fish (Gehrke et al, 1993) and molluscs (Cheuiryot et al, 1981;Hammond et al, 1994). Thus, it was hypothesized that there would be corresponding differences in invertebrate assemblages.…”