A Criticism On A Migratory Animal Breeding Season...

A criticism on â€Å"Unravelling the annual cycle in a migratory animal: breeding-season habitat loss drives population declines of monarch butterfly† Introduction The hemispheric migration of wildlife is in widespread decline specifically in the Monarch butterflies (Danaus plexippus). This species is known for its long-distance migration from its non-breeding location in Mexico to the breeding sites encompassing the south, central, and north regions of eastern North America. The main context provided in the introduction is that for predicting future population viability, it is crucial we understand the impact of environmental and anthropogenic threats on the vital rates of the species at different times and locations in its annual cycle. Specifically, there could be different environmental threats at the non-breeding and breeding sites and how they could influence the population could vary depending on how sensitive certain insect stages are to these disturbances. Thus, understanding the spatiotemporal effects are crucial for modeling the dynamics of migratory species and for guiding conservation efforts. In addition to presenting the context for their research, the authors clearly outlined the issues that they will address. In the ecological context, the main issue involves how environmental factors at different times could affect the species’ abundance. Previous research agrees that anthropogenic effects such as urbanization and changes in land-use (i.e. agricultural