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Article
Massive haplotypes underlie ecotypic differentiation in sunflowers
Species often include multiple ecotypes that are adapted to different environments1. However, it is unclear how ecotypes arise and how their distinctive combinations of adaptive alleles are maintained despite hyb...
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Article
Open AccessEvolution of nutrient resorption across the herbaceous genus Helianthus
Foliar nutrient resorption is a key modulator of plant nutrient use. However, evolutionary patterns for nutrient resorption remain unclear, especially in herbs. We measured nitrogen and phosphorus resorption o...
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Article
Environmental requirements trump genetic factors in explaining narrow endemism in two imperiled Florida sunflowers
The mechanisms generating narrow endemism have long been of interest to biologists, with a variety of underlying causes proposed. This study investigates the origins of narrow endemism of two imperiled Florida...
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Article
Does investment in leaf defenses drive changes in leaf economic strategy? A focus on whole-plant ontogeny
Leaf defenses have long been studied in the context of plant growth rate, resource availability, and optimal investment theory. Likewise, one of the central modern paradigms of plant ecophysiology, the leaf ec...
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Article
Genetic diversity and population structure in the rare Algodones sunflower (Helianthus niveus ssp. tephrodes)
Assessing levels and patterns of population genetic variation is an important step for evaluating rare or endangered species and determining appropriate conservation strategies. This is particularly important ...
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Article
Inter-island but not intra-island divergence among populations of sea oats, Uniola paniculata L. (Poaceae)
Understanding the underlying causes of phenotypic trait variation among populations is important for informing conservation decisions. This knowledge can be used to determine whether locality matters when sour...
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Article
Erratum to: Responses of Uniola paniculata L. (Poaceae), an Essential Dune-Building Grass, to Complex Changing Environmental Gradients on the Coastal Dunes
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Article
Responses of Uniola paniculata L. (Poaceae), an Essential Dune-Building Grass, to Complex Changing Environmental Gradients on the Coastal Dunes
Coastal dunes are well known for plant species zonation but less is known about species-specific responses to underlying environmental gradients. We investigated variation in morphological traits and tissue nu...
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Article
Plasticity, Not Adaptation to Salt Level, Explains Variation Along a Salinity Gradient in a Salt Marsh Perennial
Evolutionary ecologists have long been intrigued by the fact that many plant species can inhabit a broad range of environmental conditions and that plants often exhibit dramatic differences in phenotype across...
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Article
Does hydraulic lift or nighttime transpiration facilitate nitrogen acquisition?
Water movement from roots to soil at night in the process of hydraulic lift (redistribution) rehydrates the rhizosphere and has been proposed to improve plant nutrient acquisition. Another process that has now...
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Article
Phenotypic selection on leaf water use efficiency and related ecophysiological traits for natural populations of desert sunflowers
Plant water-use efficiency (WUE) is expected to affect plant fitness and thus be under natural selection in arid habitats. Although many natural population studies have assessed plant WUE, only a few related W...
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Article
Nutrient and water addition effects on day- and night-time conductance and transpiration in a C3 desert annual
Recent research has shown that many C3 plant species have significant stomatal opening and transpire water at night even in desert habitats. Day-time stomatal regulation is expected to maximize carbon gain and pr...
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Article
Habitat range and phenotypic variation in salt marsh plants
Ecologists have long speculated that species with wider environmental ranges would have broader ranges in phenotype; however, most tests of this hypothesis have involved small numbers of species and/or closely...
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Article
Nutrient relations of the halophytic shrub, Sarcobatus vermiculatus, along a soil salinity gradient
Recent water level declines of a saline and alkaline lake (Mono Lake, California, USA) have exposed large areas of former lake bottom substrates that have been sparsely colonized by the halophytic shrub, Sarco...
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Article
Carbon isotope discrimination, water-use efficiency, growth, and mortality in a natural shrub population
In order to scale up from the ecophysiological characters of individual plants to population-level questions, we need to determine if character patterns in natural populations are stable through time, and if t...
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Article
Ecophysiological differences among juvenile and reproductive plants of several woody species
Photosynthetic and water relations characteristics of small juvenile and large reproductive plants were investigated during one growing season for four woody species native to Red Butte Canyon, Utah, USA: Acer ne...
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Article
Seasonal carbon isotope discrimination in a grassland community
Grassland communities of arid western North America are often characterized by a seasonal increase in ambient temperature and evaporative demand and a corresponding decline in soil moisture availability. As th...
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Chapter
Responses of Woody Seedlings to Elevated Flood Water Temperatures
Multiple stresses acting simultaneously may affect plants more, the same, or less than each would individually. With the large number of environmental stresses created by man’s activities, determining the effe...
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Article
Interspecific differences in dead plant buffering capacity alter the impact of acid rain on decomposition rates in tidal marshes
Simulated acid rain did not alter respiration rates of microbial associations on dead Spartina alterniora from Delaware salt marshes or on dead Carex lyngbyei from Oregon brackish marshes. Since these dead plant-...
