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Genomic investigation of cnidarian toxin evolution
(2017-12)
The phylum Cnidaria (jellyfish, hydras and anemones) was one of the earliest diverging animal groups and member species have simple, diffuse nervous systems. A trait unique to Cnidaria is specialized stinging cells ...
CONSEQUENCES OF HABITAT TRANSITIONS ON LOCOMOTIVE TRAIT DIVERSIFICATION AT THE MICRO- AND MACRO-EVOLUTIONARY SCALES
(2015-05-08)
Contemporarily evolving systems provide a unique opportunity to characterize the direction, pattern, and rates of phenotypic change among multiple species. The damming of streams to create reservoirs results in a change ...
Split ends (spen), A TRANSCRIPTIONAL REGULATOR, INHIBITS MYOSIN ACTIVITY TO REGULATE NEURONAL REMODELING DURING METAMORPHOSIS
(2011)
Animal neurons dynamically change their morphologies in response to steroid hormone signaling to adapt to changing environments. The molecular mechanisms underlying animal neuronal remodeling, however, remain largely ...
Marine fish diversification along the water column gradient: a tale of many threads
(2022-08-04)
Decades of investigation about the evolutionary mechanisms responsible for the astonishing diversity of fishes have suggested habitat transitions along the water column as a prominent ecological divergence axis affecting ...
Freshwater zooplankton: ecology, cryptic species, and global change
(2016-08)
Modern threats to freshwater biota include anthropogenic eutrophication and invasive species, both of which may impact biodiversity. My four chapters focus on different aspects of these global changes. In Chapters 1 and ...
Stable isotope ratios as indicators of black-throated sparrow habitat use in the northern Chihuahuan Desert, New Mexico
(2010)
As humans accelerate their alteration of the landscape, it is increasingly important to understand relationships between organisms and their environment. Stable isotope analysis is an increasingly popular tool for identifying ...
Parental investment and offspring sex ratios in house sparrows, Passer domesticus and cattle egrets, Bubulcus ibis.
(1998)
Fisher (1930) argued that parents should invest equally in the two sexes. Since then, others have proposed conditions under which parents might be selected to bias their investment in favor of either sons or daughters. I ...
Evolutionary and environmental effects on thermoregulation among complex lizard communities.
(2002)
A community of ten sympatric lizard species was studied in a mountain canyon in southern Arizona to determine the effect of phylogeny on habitat use and thermoregulation. Habitat use, body temperatures ( Tb) and operative ...
Ants in Flight: Reproduction, Dispersal and Predation of Ant Queens
(2016-05)
Flying animals, especially insects, are a prominent feature of most terrestrial environments and make up a majority of the world’s known species. The biomechanical demands of flight shape the biology of flying insects at ...
Subsidy intermediaries: the role of aquatic plants in storing and transferring resources from aquatic biogeochemical hotspots to terrestrial ecosystems
(2022-05-13)
The roles mobile animals and abiotic processes play as vectors for resource transfers between ecosystems (subsidies) are well-studied. Trophic interactions between mobile animals and their food sources often convey subsidies ...