The effects of pesticides on zooplankton are reviewed and their ecological significance is
discussed. Toxicity is shown to vary depending on animal species, genotype, life stage, and …

Within a population there are frequently several discrete morphs. While in some cases,
particularly color polymorphisms, this variation can be explained by simple Mendelian …

This concise, readable introduction to limnology (the science of investigating the structure
and function of inland waters), places the subject in the context of modern ecology. Unlike …

Concentrations of microplastics in aquatic environments continue to rise due to industrial
production and pollution. While there are various concerns regarding potential deleterious …

This study was designed to measure and separate the physiological costs of inducible
defenses from life history trade—offs and maternal effects in the waterflea Daphnia pulex …

Debates over the role of competition in natural communities often consider two broad
alternatives. The first view, based on the Lotka Volterra model, is that populations are …

Enemy‐risk effects, often referred to as non‐consumptive effects (NCEs), are an important
feature of predator–prey ecology, but their significance has had little impact on the …

448 BioScience Vol. 39 No. 7 cladocerans and rotifers, although planktonic algae and
copepods also show periodic changes in morphology (Hutchinson 1967). Woltereck's …

Organisms that produce alternative, nondiscrete phenotypes in response to environmental
conditions are expected to alter their phenotypes in relation to the degree of environmental …

Presence of the invertebrate predator Chaoborus americanus induces Daphnia pulex to
assume an alternate, less vulnerable morphology, characterized by small protuberances …