Publications
] "Talking Through the Keys." Dalhousie Journal of Interdisciplinary Management 1 (2010).
"Parental environmental effects on life history traits in Arabidopsis thaliana (Brassicaceae)." The New Phytologist 142 (1999): 173-184.
"Pollen limitation of plant reproduction: ecological and evolutionary causes and consequences." Ecology 85 (2004): 2408-2421.
"Evolving plans for the USA National Phenology Network." Eos, Transactions American Geophysical Union 88 (2007): 211.
"Ovule number per flower in a world of unpredictable pollination." American Journal of Botany 96 (2009): 1159-1167.
"Physiological impact of metal oxide nanoparticles in soil-grown Clarkia (Onagraceae)." In ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY. Vol. 241. AMER CHEMICAL SOC 1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2011.
"Evidence for nanoparticle induced photoxicity in a soil-grown wildflower." In ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY. Vol. 248. AMER CHEMICAL SOC 1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2014.
"Environmental stresses increase photosynthetic disruption by metal oxide nanomaterials in a soil-grown plant." Acs Nano 9 (2015): 11737-11749.
"Uptake, distribution, and physiological impacts of metal oxide nanoparticles in mature crop plants: Evidence for nanophototoxicity?" In ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY. Vol. 250. AMER CHEMICAL SOC 1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2015.
"Sensitivity of spring phenology to warming across temporal and spatial climate gradients in two independent databases." Ecosystems 15 (2012): 1283-1294.
"Phylogenetic conservatism in plant phenology." Journal of Ecology 101 (2013): 1520-1530.
"Phenology in higher education: ground-based and spatial analysis tools." In Phenology: An Integrative Environmental Science, 585-602. Springer, Dordrecht, 2013.
"Temporal variation in the pollen: ovule ratios of Clarkia (Onagraceae) taxa with contrasting mating systems: field populations." Journal of evolutionary biology 21 (2008): 310-323.
"Nutrient levels and salinity affect gender and floral traits in the autogamous Spergularia marina." International Journal of Plant Sciences 157 (1996): 621-631.
"Size-dependent pollen: ovule ratios and the allometry of floral sex allocation in Clarkia (Onagraceae) taxa with contrasting mating systems." American Journal of Botany 96 (2009): 968-978.
"The neighborhood matters: effects of neighbor number and sibling (or kin) competition on floral traits in Spergularia marina (Caryophyllaceae)." Evolution 56 (2002): 2406-2413.
The structure of phenotypic variation in gender and floral traits within and among populations of Spergularia marina (Caryophyllaceae)(vol 82, pg 798, 1995) In AMERICAN JOURNAL OF BOTANY. Vol. 83. BOTANICAL SOC AMER INC OHIO STATE UNIV-DEPT BOTANY 1735 NEIL AVE, COLUMBUS, OH 43210, 1996.
"The structure of phenotypic variation in gender and floral traits within and among populations of Spergularia marina (Caryophyllaceae)." American Journal of Botany 82 (1995): 798-810.
"Forecasting phenology: from species variability to community patterns." Ecology letters 15 (2012): 545-553.
"The joint evolution of mating system, floral traits and life history in Clarkia (Onagraceae): genetic constraints vs. independent evolution." Journal of evolutionary biology 20 (2007): 2200-2218.
"Physiological performance and mating system in Clarkia (Onagraceae): Does phenotypic selection predict divergence between sister species?" American Journal of Botany 99 (2012): 488-507.
"Seasonal changes in physiological performance in wild Clarkia xantiana populations: implications for the evolution of a compressed life cycle and self-fertilization." American journal of botany 102 (2015): 962-972.
"The plant phenology monitoring design for the national ecological observatory network." Ecosphere 7 (2016): e01303.
"Could seasonally deteriorating environments favour the evolution of autogamous selfing and a drought escape physiology through indirect selection? A test of the time limitation hypothesis using artificial selection in Clarkia." Annals of Botany 121 (2018): 753-766.
"Project Baseline: An unprecedented resource to study plant evolution across space and time." American Journal of Botany 103 (2016): 164-173.
"How climate change affects plants' sex lives." Science 353 (2016): 32-33.
"Seed allometry and disperser assemblages in tropical rainforests: a comparison of four floras on different continents." 2007) Seed dispersal: theory and its application in a changing world. Wallingford, UK: CAB International Publishing (2007): 5-36.
"The resurrection initiative: storing ancestral genotypes to capture evolution in action." AIBS Bulletin 58 (2008): 870-873.
"Spatial uncertainty in herbarium data: simulated displacement but not error distance alters estimates of phenological sensitivity to climate in a widespread California wildflower." Ecography e06107 (2022).
"Phenological responsiveness to climate differs among four species of Quercus in North America." Journal of Ecology 105 (2017): 1610-1622.
"A new fine-grained method for automated visual analysis of herbarium specimens: a case study for phenological data extraction." Applications in Plant Sciences 8: e11368 (2020).
"Geographic variation in primary sex allocation per flower within and among 12 species of Pedicularis (Orobanchaceae): proportional male investment increases with elevation." American Journal of Botany 97 (2010): 1334-1341.
"Geographic variation in seed mass within and among nine species of Pedicularis (Orobanchaceae): effects of elevation, plant size and seed number per fruit." Journal of Ecology 98 (2010): 1232-1242.
"Reproductive allometry in Pedicularis species changes with elevation." Journal of Ecology 100 (2012): 452-458.
"Biological invasions in nature reserves in China." In Biological invasions and its management in China, 125-147. Springer, Dordrecht, 2017.
"The phenology handbook." University of California, Santa Barbara (2008): P41.
"The California Phenology Project: tracking plant responses to climate change." Madroño 60 (2013): 1-3.
"A flora of the University of California Natural Reserve System." Website http://nrs. ucop. edu/reserves/flora/flora. htm [accessed 01 October 2012] (2011).
"Pollen performance in Clarkia taxa with contrasting mating systems: implications for male gametophytic evolution in selfers and outcrossers." Plants 2 (2013): 248-278.
"Seed set variation in wild Clarkia populations: teasing apart the effects of seasonal resource depletion, pollen quality, and pollen quantity." Ecology and evolution 6 (2016): 6524-6536.
"Plant ecotypes: genetic differentiation in the age of ecological restoration." Trends in Ecology & Evolution 18 (2003): 147-155.
"Local adaptation and effects of grazing among seedlings of two native california bunchgrass species: Implications for restoration." Restoration Ecology 16 (2008): 59-69.
"Local adaptation and the effects of grazing on the performance of Nassella pulchra: implications for seed sourcing in restoration." Restoration Ecology 20 (2012): 688-695.
"Pollen limitation of plant reproduction: pattern and process." Annu. Rev. Ecol. Evol. Syst. 36 (2005): 467-497.
"Heritability and variance components of seed size in wild species: influences of breeding design and the number of genotypes tested." Heredity 130 (2023): 251-258.
"Genotype × environment interaction obscures genetic sources of variation in seed size in Dithyrea californica but provides the opportunity for selection on phenotypic plasticity." American Journal of Botany 109, no. 11 (2022): 1547-1860.
"Allee effects within small populations of Aconitum napellus ssp. lusitanicum, a protected subspecies in northern France." New Phytologist 179 (2008): 1171-1182.
"A new phenological metric for use in pheno‐climatic models: A case study using herbarium specimens of Streptanthus tortuosus." Applications in Plant Sciences 7, no. 7 (2019).
"Region-specific phenological sensitivities and rates of climate warming generate divergent temporal shifts in flowering date across a species’ range." American Journal of Botany.
"Region-specific phenological sensitivities and rates of climate warming generate divergent temporal shifts in flowering date across a species’ range." American Journal of Botany (2021).
"Geographic variation in offspring size: Long- and short-term climate affect mean seed mass of Streptanthus populations." Ecology e3698 (2022).
"Machine Learning Undercounts Reproductive Organs on Herbarium Specimens but Accurately Derives Their Quantitative Phenological Status: A Case Study of Streptanthus tortuosus." plants 10 (2021).
"Nitrogen: phosphorous supply ratio and allometry in five alpine plant species." Ecology and evolution 6 (2016): 8881-8892.
"Relationship between genetic structure and seed and pollen dispersal in the endangered orchid Spiranthes spiralis." New Phytologist 157 (2003): 677-687.
"Allozyme variation in Ulmus species from France: analysis of differentiation." Heredity 78 (1997): 12.
"Historical changes in flowering phenology are governed by temperature x precipitation interactions in a widespread perennial herb in western North America." New Phytologist 210 (2016): 157-167.
"Ecological, Taxonomic, and Life History Correlates of Seed Mass Among Indiana Dune Angiosperms: Ecological Archives M059-001." Ecological Monographs 59 (1989): 153-175.
"The quantitative genetics of life history and fitness components in Raphanus raphanistrum L.(Brassicaceae): ecological and evolutionary consequences of seed-weight variation." The American Naturalist 130 (1987): 891-914.
"Parental effects on seed development and seed yield in Raphanus raphanistrum: implications for natural and sexual selection." Evolution 41 (1987): 355-371.
"Constancy of population parameters for life-history and floral traits in Raphanus sativus L. II. Effects of planting density on phenotype and heritability estimates." Evolution 45 (1991): 1888-1907.
"Fertilization dynamics and parental effects upon fruit development in Raphanus raphanistrum: consequences for seed size variation." American Journal of Botany 73 (1986): 500-511.
"Seed mass of Indiana Dune genera and families: taxonomic and ecological correlates." Evolutionary Ecology 4 (1990): 326-357.
"Size-dependent sex allocation within flowers of the annual herb Clarkia unguiculata (Onagraceae): ontogenetic and among-plant variation." American Journal of Botany 88 (2001): 819-831.
"Responses of floral traits to selection on primary sexual investment in Spergularia marina: the battle between the sexes." Evolution 53 (1999): 717-731.
"Parental effects on progeny phenotype in plants: distinguishing genetic and environmental causes." Evolution 50 (1996): 44-53.
"Fruit size and shape: allometry at different taxonomic levels in bird-dispersed plants." Evolutionary Ecology 7 (1993): 556-575.
"Variation and covariation among floral traits within and among four species of northern European Primula (Primulaceae)." American Journal of Botany 80 (1993): 474-485.
"Planting density influences the expression of genetic variation in seed mass in wild radish (Raphanus sativus L.: Brassicaceae)." American Journal of Botany 79 (1992): 1185-1193.
"Genetic variation in life-history traits: heritability estimates within and genetic differentiation among populations." Life history evolution in plants (1999): 87-171.
"Maternal investment and male reproductive success in angiosperms: parent-offspring conflict or sexual selection?" Biological Journal of the Linnean Society 30 (1987): 115-133.
"Life history, floral development, and mating system in Clarkia xantiana (Onagraceae): do floral and whole-plant rates of development evolve independently?" American Journal of Botany 91 (2004): 2041-2050.
"Contrasting variation within and covariation between gender-related traits in autogamous versus outcrossing species: alternative evolutionary predictions." Evolutionary Ecology 12 (1998): 403-425.
"Family mean correlations among fitness components in wild radish: controlling for maternal effects on seed weight." Canadian journal of botany 67 (1989): 1890-1897.
"Alternative approaches to the analysis of comparative data: compare and contrast." American Journal of Botany 85 (1998): 1194-1199.
"Seasonal changes in components of male and female reproductive success in Raphanus sativus L.(Brassicaceae)." Oecologia 81 (1989): 345-353.
"Floral trait variation in Spergularia marina (Caryophyllaceae): ontogenetic, maternal family, and population effects." Heredity 77 (1996): 269.
"Covariation among floral traits in Spergularia marina (Caryophyllaceae): geographic and temporal variation in phenotypic and among-family correlations." Journal of Evolutionary Biology 9 (1996): 993-1015.
"Fruits of Wetherellia and Palaeowetherellia (? Euphorbiaceae) from Eocene sediments in Virginia and Maryland." Brittonia 34 (1982): 300-333.
"Temporal instability of genetic components of floral trait variation: maternal family and population effects in Spergularia marina (Caryophyllaceae)." Evolution 50 (1996): 2509-2515.
"Evolution of mating system and the genetic covariance between male and female investment in Clarkia (Onagraceae): selfing opposes the evolution of trade-offs." Evolution 61 (2007): 83-98.
"Geographic variation in flower size in wild radish: the potential role of pollinators in population differentiation." Adaptive genetic variation in the wild. Oxford University Press, New York (2000): 157-186.
"Stability of pollen–ovule ratios in pollinator-dependent versus autogamous Clarkia sister taxa: testing evolutionary predictions." New Phytologist 183 (2009): 630-648.
"The joint evolution of mating system and pollen performance: predictions regarding male gametophytic evolution in selfers vs. outcrossers." Perspectives in Plant Ecology, Evolution and Systematics 12 (2010): 31-41.
"Effects of nutrient availability on primary sexual traits and their response to selection in Spergularia marina (Caryophyllaceae)." Journal of evolutionary biology 16 (2003): 767-778.
"Environmental, genetic, and seed mass effects on winged seed production in the heteromorphic Spergularia marina (Caryophyllaceae)." Functional Ecology 17 (2003): 637-650.
"Rainforest plants protect their investments." Trends in ecology & evolution 13 (1998): 471-473.
"Physiological performance in Clarkia sister taxa with contrasting mating systems: do early-flowering autogamous taxa avoid water stress relative to their pollinator-dependent counterparts?" International Journal of Plant Sciences 171 (2010): 1029-1047.
"Seeds-Ecology, biogeography, and evolution of dormancy and germination." Science 283 (1999): 334.
"Plant Population Genetics as a Research Tool." Evolution 45 (1991): 1536-1538.
Arenaria Paludicola (marsh Sandwort: Caryophyllaceae) and Rorippa Gambelii (Gambel's Watercress: Brassicaceae) in Black Lake Canyon and the Oso Flaco Lake Region: Field Observations, Greenhouse Cultivation, Molecular Genetic Variation, and Trial Reintrodu. Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, 2001.