02181nas a2200229   4500008004100000022001400041245006000055210006000115260000800175300001000183490000800193520149500201653001601696653002701712653002101739653001301760653001801773100002401791700002101815700002601836856008901862       2019                        eng d  a0022-519300aEffect of copper contamination on zooplankton epidemics0 aEffect of copper contamination on zooplankton epidemics  cMAY  a61-740 v4693 a<p>Infectious disease and chemical contamination are increasingly becoming vital issues in many ecosystems. However, studies integrating the two are surprisingly rare. Contamination not only affects the inherent host-resource interaction which influences the epidemic process but may also directly affect epidemiological traits via changes in host's behaviour. The fact that heavy metal such as copper is also an essential trace element for organisms, further increase complexity which make predicting the resultant effect of contamination and disease spread difficult. Motivated by this, we model the effect of copper enrichment on a phytoplankton-zooplankton-fungus system. We show that extremely deficient or toxic copper may have a destabilizing effect on the underlying host-resource dynamics due to increased relative energy fluxes as a result of low host mortality due to fish predation. Further, on incorporating disease into the system, we find that the system can become disease-free for an intermediate range of copper concentration whereas it may persist for very less copper enrichment. Also, we predict that there may exist vulnerable regions of copper concentration near the toxic and deficient levels, where the parasite can invade the system for a comparatively lower spore yield. Overall, our results demonstrate that, the effect of contamination may be fundamental to understanding disease progression in community ecology. (C) 2019 Elsevier Ltd. All rights reserved.</p>10aBistability10aChemical contamination10aDaphnia-parasite10aHormesis10aHost-resource1 aBanerjee, Swarnendu1 aSarkar, Ram, Rup1 aChattopadhyay, Joydev  uhttps://library.ncl.res.in/content/effect-copper-contamination-zooplankton-epidemics