The Phytochemical Landscape

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The variation in plant chemistry plays a crucial role in mediating trophic interactions such as herbivory, predation, parasitism, and disease, while these interactions also influence the spatial and temporal variation in plant chemistry. Mark Hunter presents a novel framework that connects these trophic interactions with nutrient cycling in ecosystems. He introduces the concept of the "phytochemical landscape," which represents the dynamic mosaic of plant chemistry that links trophic interactions and nutrient dynamics. Hunter illustrates how plant chemistry acts as both a cause and consequence of these interactions, mediating ecosystem processes like nutrient cycling. The composition of nutrients and organic molecules in plant tissues affects decomposition rates and the movement of elements like carbon, nitrogen, and phosphorus. Conversely, the availability of these nutrients shapes the chemistry of the plant cells and tissues produced. This interplay creates feedback loops that influence nutrient dynamics through plant chemistry. Hunter supports his arguments with evidence from both terrestrial and aquatic systems, demonstrating how an emphasis on the phytochemical landscape enhances our understanding and management of ecosystems. This work is essential for students and researchers, offering an integrated perspective on ecological processes at various levels.