196
10. Life-Stage-Based Recovery Dynamics of M arine Invertebrates
NEPH JUVENILES
MATUREN JUV IMM
LAG N ADT2
FIGURE 10.3
seabed also affect the rate of post-settlement immigration . This proportion ,
representing the level of background advection, is varied systematically in
different model runs between 0 and 1 and captured by the flows N ]UVADVECTION, N ADT ADVECTION, P ] UV ADVECTION, AND P ADT ADVECTION. In nature, this process might be affected by near-bottom current
spee d, popul ation size structure, sediment characteristics, organism swimming behaviors, etc. (e.g. Cummings et al. 1995; Commito et al. 1995; Shull
1997). For simplicity, the advection rate is kept constant during a given
model run. However, advection rates of juveniles and adults could be independently adjusted between runs.
For purp oses of this model, we assume that adult worms colonize a previously defaunated patch from three different colonization routes: (1) through
larval colonization, subsequent survival and growth through the juvenile stage, and eventual maturation into the adult life-stage; (2) from