6 Works

Data from: Little giants: a rapidly invading seagrass alters ecosystem functioning relative to native foundation species

Ranjan Muthukrishnan, Kelcie L. Chiquillo, Candice Cross, Peggy Fong, Thomas Kelley, C. Anna Toline, Regina Zweng & Demian A. Willette
The spread of invasive species is a major component of global ecological change and how and when to manage particular species is a diicult empirical question. Ideally, these decisions should be based on the speciic impacts of invading species including both their efects on native competitors and how they may or may not play similar roles in broader ecosystem functioning. Halophila stipulacea is an invasive seagrass currently spreading through the Caribbean, and as seagrasses are...

Data from: Increasing photoperiod stimulates initiation of spring migratory behaviour and physiology in a facultative migrant, the pine siskin

Ashley R. Robart, Mali M.K. McGuire, Heather E. Watts & Mali M. K. McGuire
The transition to a migratory state involves coordinated changes in physiology and behaviour. In species with regular, predictable (obligate) migrations, increasing day length triggers the expression of a spring migratory state and androgens play an important role in stimulating its development. In contrast, we know very little about the environmental cues and endocrine mechanisms that regulate migration in species with less predictable (facultative) migrations. Here, we tested whether photoperiod stimulates a migratory state in a...

Data from: Plasticity of thermal tolerance and its relationship with growth rate in juvenile mussels (Mytilus californianus)

Lani U. Gleason, Emma L. Strand, Brian J. Hizon & W. Wesley Dowd
Complex life cycles characterized by uncertainty at transitions between larval/juvenile and adult environments could favor irreversible physiological plasticity at such transitions. To assess whether thermal tolerance of intertidal mussels (Mytilus californianus) adjusts to post-settlement environmental conditions, we collected juveniles from their thermally buffered microhabitat from high and low-shore locations at cool (wave-exposed) and warm (wave-protected) sites. Juveniles were transplanted to unsheltered cages at the two low sites or placed in a common garden. Juveniles transplanted...

Data from: Micro-scale environmental variation amplifies physiological variation among individual mussels

Ana Jimenez, Sarah Jayawardene, Shaina Alves, Jeremiah Dallmer, W. Wesley Dowd & Ana Gabriela Jimenez
The contributions of temporal and spatial environmental variation to physiological variation remain poorly resolved. Rocky intertidal zone populations are subjected to thermal variation over the tidal cycle, superimposed with micro-scale variation in individuals’ body temperatures. Using the sea mussel (Mytilus californianus), we assessed the consequences of this micro-scale environmental variation for physiological variation among individuals, first by examining the latter in field-acclimatized animals, second by abolishing micro-scale environmental variation via common garden acclimation, and third...

Data from: Multimodal in situ datalogging quantifies inter-individual variation in thermal experience and persistent origin effects on gaping behavior among intertidal mussels (Mytilus californianus)

Luke P. Miller & W. Wesley Dowd
In complex habitats, environmental variation over small spatial scales can equal or exceed larger-scale gradients. This small-scale variation may allow motile organisms to mitigate stressful conditions by choosing benign microhabitats, whereas sessile organisms may rely on other behaviors to cope with environmental stresses in these variable environments. We developed a monitoring system to track body temperature, valve gaping behavior, and posture of individual mussels (Mytilus californianus) in field conditions in the rocky intertidal zone. Neighboring...

Data from: Genomic evidence for ecological divergence against a background of population homogeneity in the marine snail Chlorostoma funebralis

Lani U. Gleason & Ronald S. Burton
The balance between natural selection, gene flow and genetic drift is difficult to resolve in marine invertebrates with extensive dispersal and fluctuating population sizes. The intertidal snail Chlorostoma funebralis has planktonic larvae and previous work using mtDNA polymorphism reported no genetic population structure. Nevertheless, recent studies have documented differences in thermal tolerance and transcriptomic responses to heat stress between northern and southern California, USA, populations. To gain insight into the dynamics influencing adaptive divergence, we...

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