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Introduction
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Publications
Publications (16)
Species colonizations (both natural and anthropogenic) can be associated with genetic founder effects, where founding populations demonstrate significant genetic bottlenecks compared to native populations. Yet, many successfully established free-living species exhibit little reduction in genetic diversity-possibly due to multiple founding events an...
The many values that humans place on biodiversity are widely acknowledged but difficult to measure in practice. We address this problem by quantifying the contribution of marine-related environmental stewardship, in the form of donations and volunteer hours, to the economy of coastal Massachusetts. Our conservative evaluation suggests that marine s...
Species face multiple selective pressures that may require opposing responses to mitigate. On rocky shorelines, fitness of the intertidal snail Littorina littorea is determined by both parasitism and predation. We experimentally demonstrated that L. littorea was at greatest risk of infection from trematode parasites high in the intertidal zone wher...
Parasites are integral members of natural communities, but large-scale determinants of their abundance and diversity, including the importance of biotic and abiotic factors, both natural and anthropogenic, are often not well understood. Here, we examine which factors best predict larval trematode communities in the mudsnail host Ilyanassa obsoleta...
Complex nonlinear dynamics in marine fisheries create challenges for prediction and management, yet the extent to which they occur in fisheries is not well known. Using nonlinear forecasting models, we analysed over 200 time series of survey abundance and landings from two distinct ecosystems for patterns of dynamic complexity (dimensionality and n...
Passed in 1972, the Marine Mammal Protection Act has two fundamental objectives: to maintain U.S. marine mammal stocks at their optimum sustainable populations and to uphold their ecological role in the ocean. The current status of many marine mammal populations is considerably better than in 1972. Take reduction plans have been largely successful...
Identifying the characteristics that determine the success of invasive species has been a major goal of ecology for many decades. Most efforts have focused on life history characteristics of introduced species, environmental tolerances, or on species interactions, such as enemy release. Many of these factors are themselves influenced by more fundam...
We examined evidence for nonlinear dynamics in fishery-independent survey data
for an assemblage of 26 fish species on Georges Bank spanning the period 1963 to 2008. We used
nonlinear time series analysis to determine (1) the presence of nonlinear dynamics in fish populations
on Georges Bank, (2) the minimum number of dimensions required to effecti...
Aim To use a comparative approach to understand parasite demographic patterns in native versus introduced populations, evaluating the potential roles of host invasion history and parasite life history.
Location North American east and west coasts with a focus on San Francisco Bay (SFB).
Methods Species richness and prevalence of trematode parasites...
As invasive species proliferate and expand their ranges, they often interact either with natives or with other invasives across a broad geographic range. Moreover, because geographic ranges span a diversity of environments, the outcome of interactions between species pairs may vary spatially. The European green crab Carcinus maenas and the Asian sh...
Digenean trematode parasites require multiple host species to complete their life cycles, and their abundance can often be strongly correlated with the abundance of their host species. Species richness and abundance of parasites in easily sampled host species may yield an accurate estimate of the species richness and abundance of other hosts in a p...
Background/Question/Methods
Parasites are important and abundant members of communities; thus it is critical to understand their influences within and among bioregions. Specifically, understanding how parasite diversity patterns are affected by anthropogenic dispersal of their hosts and the effect differing vectors may have on those patterns is l...
The application of ecosystem-based management (EBM) in marine environments has been widely supported by scientists, managers, and policy makers, yet implementation of this approach is difficult for various scientific, political, and social reasons. A key, but often overlooked, challenge is how to account for multiple and varied human activities and...
Parasites often play an important role in modifying the physiology and behavior of their hosts and may, consequently, mediate the influence hosts have on other components of an ecological community. Along the northern Atlantic coast of North America, the dominant herbivorous snail Littorina littorea structures rocky intertidal communities through s...
