KRUG LAB - EVOLUTIONARY AND LARVAL ECOLOGY OF MARINE INVERTEBRATES
Here are the areas in which my lab is currently working, with summaries of past and ongoing research to help guide inquiries by interested students and collaborators, and to efficiently synthesize and disseminate our findings to the research community and general public.
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1. Molecular phylogenetics. Efforts include delimiting and
describing new species, and placing all taxa in an evolutionary
framework using molecular data. Our goal is a robust phylogeny
with which to revise sacoglossan systematics, and for comparative
studies of trait coevolution and lineage diversification. Click on:
Phylogenetic systematics of Sacoglossa
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Species discovery and description
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Comparative analyses: trait evolution, diversification
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2. Larval biology. We continue to investigate the causes and
consequences of shifts in larval development from dispersive
to non-dispersive strategies, and the effects of larval type on
realized gene flow. Check out:
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Variable larval development (poecilogony)
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Larval dispersal, behavior and connectivity
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3. Kleptoplasty and sacoglossan ecology. We study
the ecological and evolutionary consequences of being a
photosynthetic animal using kleptoplastic species of slugs
that store functional algal chloroplasts within their cells.
We are interested in understanding how the functional
and mechanistic differences among non-retaining, short-
short-term and long-term retaining kleptoplastic species.
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4. Range limits and local adaptation. Using estuarine
species along the Californian coast, we investigate the
ecological and evolutionary factors that set range limits
and affect local adaptation to range-edge stressors. Such
studies can yield important insight into predicting range
shifts in response to ongoing climate change.
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5. Marine chemical ecology. I am interested in diverse
ecological interactions mediated by chemical signalling
in the sea, including larval settlement cues, defense from
predation, and pheromonal cues that affect reproduction.
Integrative species delimitation in Oxynoe
Poecilogonous species A. willowi (left, adult; right, egg masses) and C. ocellifera (center)
Long-term retaining taxa E. crispata (left) and E. chlorotica (right) keep kleptoplasts for months
Collecting field abundance data for Alderia spp. in San Francisco Bay to study the ecological basis of range limits