Kristine Bonnevies hus
Since the very first representation of an ecological network (Camerano, 1880), food webs have become an important tool to explore and summarize the trophic interactions between species that coexist in an ecosystem. The architecture of food webs is intimately related to how ecosystems function, and determines the services ecosystems provide. Changes in the structure of food webs may have drastic consequences for the functioning of ecosystems. Yet, our understanding of how food webs vary over time remains unclear.
Accomplishing a complete inventory of species and their interactions requires significant effort, and the diversity and dynamics of nature makes it challenging to follow variability in food webs over time: species come and go, or become more or less abundant.
In this study, we asked the question: How are changes in species composition (presence/absence and abundances) influencing food web structure over time?
In my last post, I explained why resolution matters in food webs. However, I never properly introduced what is a food web and how to build them.
Food web describe the diversity of species and their feeding relationships. In theory, building a food web comes down to listing trophic relationships. In practise, building a comprehensive food web is challenging and comes at some cost. Nonetheless, our methodology presented hereinbelow can be used to find the best trade-offs.