Corals are biogenic habitat and host a variety of symbionts. Some of these symbionts provide benefits for the coral, while others are harmful. I’m interested in how these positive and negative interactions create spatial patterns across a seascape. These dynamics depend on factors such as settlement patterns, mortality, and the strength and direction of the interaction.
To address these questions, I use a combination of field and modeling approaches. For example, in Hamman 2018 (Coral Reefs), I documented the spatial distributions of two corallivorous snails and explored the causes and consequences of those distributions. In Hamman et al. 2018 (Theoretical Ecology), I led a modeling effort that demonstrated how the configuration of habitat patches (e.g. corals) could generate similar levels of heterogeneity in occupant numbers as variation in habitat quality.
focusing on organisms organisms such as corallivorous snails, (e.g. Coralliophila violacea, pictured and Drupella cornus), as well as mutualistic reef fish. I’m currently working on models of spatial coral dynamics that implicitly include these interactions as part of an NSF grant that uses both fieldwork and modeling to 1) explore the variation in corals and CAFI (coral-associated fish and invertebrates), 2) test the effect of habitat attributes (e.g. size and location) on CAFI settlement, 3) testing the effect of CAFI on coral condition, and 4) using models to extrapolate short-term effects to predict long-term spatial and population patterns.