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Obstetrician & Gynecologist (OB/GYN)
11 years of experience
Video profile
Accepting new patients

Education ?

Medical School Score Rankings
University of Pennsylvania (1999)
  • Currently 4 of 4 apples
Top 25%

Awards & Distinctions ?

Appointments
University of Pennsylvania
Assistant Professor of Clinical Obstetrics and Gynecology
Associations
American Board of Obstetrics and Gynecology

Affiliations ?

Dr. Coleman is affiliated with 8 hospitals.

Hospital Affilations

Score

Rankings

  • Pennsylvania Hospital University PA Health System
    800 Spruce St, Philadelphia, PA 19107
    • Currently 4 of 4 crosses
    Top 25%
  • Johns Hopkins Bayview Medical Center
    4940 Eastern Ave, Baltimore, MD 21224
    • Currently 4 of 4 crosses
    Top 25%
  • Hospital of the University of PA
    3400 Spruce St, Philadelphia, PA 19104
    • Currently 4 of 4 crosses
    Top 25%
  • The Johns Hopkins Hospital
    600 N Wolfe St, Baltimore, MD 21287
    • Currently 4 of 4 crosses
    Top 25%
  • Howard County General Hospital
    5755 Cedar Ln, Columbia, MD 21044
    • Currently 3 of 4 crosses
    Top 50%
  • Children's Hospital of Philadelphia
    Obstetrician & Gynecologist
    324 S 34th St, Philadelphia, PA 19104
    • Currently 1 of 4 crosses
  • Johns Hopkins Geriatrics Center
    5505 Hopkins Bayview Cir, Baltimore, MD 21224
  • Mount Clemens Regional Medical Center
  • Publications & Research

    Dr. Coleman has contributed to 25 publications.
    Title Variation in Heat-shock Proteins and Photosynthetic Thermotolerance Among Natural Populations of Chenopodium Album L. from Contrasting Thermal Environments: Implications for Plant Responses to Global Warming.
    Date April 2009
    Journal Journal of Integrative Plant Biology
    Excerpt

    Production of heat-shock proteins (Hsps) is a key adaptation to acute heat stress and will be important in determining plant responses to climate change. Further, intraspecifc variation in Hsps, which will influence species-level response to global warming, has rarely been examined in naturally occurring plants. To understand intraspecific variation in plant Hsps and its relevance to global warming, we examined Hsp content and thermotolerance in five naturally occurring populations of Chenopodium album L. from contrasting thermal environments grown at low and high temperatures. As expected, Hsp accumulation varied between populations, but this was related more to habitat variability than to mean temperature. Unexpectedly, Hsp accumulation decreased with increasing variability of habitat temperatures. Hsp accumulation also decreased with increased experimental growth temperatures. Physiological thermotolerance was partitioned into basal and induced components. As with Hsps, induced thermotolerance decreased with increasing temperature variability. Thus, populations native to the more stressful habitats, or grown at higher temperatures, had lower Hsp levels and induced thermotolerance, suggesting a greater reliance on basal mechanisms for thermotolerance. These results suggest that future global climate change will differentially impact ecotypes within species, possibly by selecting for increased basal versus inducible thermotolerance.

    Title Variation in Eastern Cottonwood (populus Deltoides Bartr.) Phloem Sap Content Caused by Leaf Development May Affect Feeding Site Selection Behavior of the Aphid, Chaitophorous Populicola Thomas (homoptera: Aphididae).
    Date April 2008
    Journal Environmental Entomology
    Excerpt

    Apterous populations of Chaitophorous populicola Thomas (Homoptera: Aphididae) appear to track Eastern cottonwood (Populus deltoides Bartr.) leaf development. Few aphids occur on mature leaves. Marked individual aphids on leaves of different developmental stages were observed through a period of new leaf initiation. Nymph and adult C. populicola frequently track leaf development by moving up to younger leaves. A comparison of phloem sap constituents and leaf toughness among leaf developmental stages revealed some differences that could be used by C. populicola to determine leaf age. Phloem sap exudates, collected from P. deltoides leaves of different developmental stages, were analyzed by high-performance liquid chromatography for free amino acids and the phenolic glycoside salicin. Sucrose concentration in exudates, indicative of phloem sap exudation rate, was uniform among leaf stages. Of 20 amino acids examined, only aspartic acid and gamma-amino-n-butyric acid (GABA) concentrations differed significantly between leaf stages. Forward stepwise discriminant function analysis showed that seven of the amino acids analyzed are useful for classifying leaf maturity groupings. Aphid-infested cottonwoods had lower cystine concentrations in phloem sap than aphid-free plants. Salicin concentration was significantly higher in new leaves. Leaf toughness was assessed by lignin density and distance measurements in petiole cross-sections. Rapidly expanding leaves had significantly less lignification and new leaves had shorter distances to the vascular bundles than senescent leaves. These physiological and phytochemical differences among P. deltoides leaf developmental stages may contribute to the leaf stage selection patterns exhibited by the aphid, C. populicola.

    Title Allometric Analysis Reveals Relatively Little Variation in Nitrogen Versus Biomass Accrual in Four Plant Species Exposed to Varying Light, Nutrients, Water and Co2.
    Date December 2007
    Journal Plant, Cell & Environment
    Excerpt

    Nitrogen concentrations in plant tissues can vary as a function of resource availability. Altered rates of plant growth and development under varying resource availabilities were examined to determine their effects on changes in whole-plant N use efficiency (NUE). Three species of old-field annuals were grown at broadly varying light, nutrient and water levels, and four species at varying atmospheric concentrations of CO2. Study results show highly variable N accrual rates when expressed as a function of plant age or size, but similar patterns of whole-plant N versus non-N biomass accrual over a wide range of environmental conditions. However, severely light-limited plants showed increased N versus biomass accrual for two of three species, and severely nutrient-limited plants had decreased N versus biomass accrual for all species. Whole-plant N accrual versus age and N versus biomass accrual increased under saturating water for two of three species. A marginally significant, modest decrease in N versus biomass accrual was found at high CO2 levels for two of four species. Physiological adjustments in NUE, expressed as N versus biomass accrual, were limited to environments with severely limited or overabundant resources.

    Title Infectious Correlates of Hiv-1 Shedding in the Female Upper and Lower Genital Tracts.
    Date August 2007
    Journal Aids (london, England)
    Excerpt

    OBJECTIVES: To determine the effects of vaginal, cervical, and endometrial infections on shedding of HIV-1 RNA in the female genital tract. DESIGN: Cross-sectional. METHODS: Antiretroviral-naive women from Nairobi, Kenya with CD4 cell counts >or= 350 cells/mul had plasma and endocervical wick samples collected for HIV quantification by real-time RNA reverse transcriptase-polymerase chain reaction. Vaginal and cervical Gram stains and endometrial biopsies were obtained. Vaginal Gram stain was used to diagnose bacterial vaginosis and to quantify Lactobacillus levels. RESULTS: Twenty-six of 50 (52%) women had detectable endocervical HIV-1 RNA with a median endocervical viral load of 1760 copies/ml (range: undetectable to 1 1,030,000 copies/ml). Women with decreased Lactobacillus had 15.8-fold [95% confidence interval (CI), 2.0-123] greater endocervical HIV-1 RNA than women with normal Lactobacillus levels. Women with plasma cell (PC) endometritis [>or= 1 PC/high-power field (hpf)] had a 15.8-fold (95% CI, 2.0-120) higher endocervical HIV RNA level than women without PC endometritis. Both these associations remained after controlling for plasma viral load. Cervicitis (>or= 30 polymorphonuclear leukocytes/hpf), however, was not associated with endocervical HIV-1 RNA shedding (P = 0.81). CONCLUSIONS: In HIV-1-infected, antiretroviral-naive women without symptoms of pelvic inflammatory disease infection, abnormal vaginal flora and inflammatory cells in the endometrium affected HIV-1 shedding from the lower genital tract. These data suggest that both the upper and lower genital tracts contribute to female HIV-1 genital shedding.

    Title Discrimination Training of Phonemic Contrasts Enhances Phonological Processing in Mainstream School Children.
    Date August 2005
    Journal Brain and Language
    Excerpt

    Auditory perceptual learning has been proposed as effective for remediating impaired language and for enhancing normal language development. We examined the effect of phonemic contrast discrimination training on the discrimination of whole words and on phonological awareness in 8- to 10-year-old mainstream school children. Eleven phonemic contrast continua were synthesised using linear interpolation coding from real speaker endpoints. Thirty children were pre-tested on the Word Discrimination Test (WDT) and the Phonological Assessment Battery (PhAB). Eighteen then trained for 12 x 30min sessions over 4 weeks using an adaptive three interval two alternative phonemic matching task. The remaining children participated in regular classroom activities. In Post-testing, trained children significantly increased their age-equivalent scores on both the WDT and PhAB by about 2 years. For the PhAB, no improvement was found in the controls. Enhanced performance in the trained children was maintained in a delayed test 5-6 weeks following training. Enhancements on the trained discriminations were weak and variable. The results indicate a dramatic improvement in phonological awareness following phonemic discrimination training without matching perceptual learning.

    Title Application of Controlled Mesocosms for Understanding Mercury Air-soil-plant Exchange.
    Date June 2005
    Journal Environmental Science & Technology
    Excerpt

    Whole system elemental mercury (Hg0) flux was measured for approximately 1.5 years using two large gas exchange mesocosms containing approximately 100 two-year old aspen trees (Populus tremuloides) planted in soil with elevated mercury concentrations (12.3 microg/g). We hypothesized that during leafout, whole mesocosm Hg0 flux would increase due to movement of Hg0 in the transpiration stream from the soil to the air. This hypothesis was not supported; plants were found to assimilate Hg0 from the contaminated air, and whole system Hg0 emissions were reduced as plants leafed-out due to shading of the soil. Surface disturbance, watering, and increases in soil moisture, light, and temperature were all found to increase whole system Hg0 flux, with light being a more significant factor. Although surface soils were maintained at 15-20% moisture, daily watering caused pulses of Hg0 to be released from the soil throughout the experiment. Data developed in this experiment suggested that those processes acting on the soil surface are the primary influence on Hg emissions and that the presence of vegetation, which shields soil surfaces from incident light, reduces Hg emissions from enriched soils.

    Title Responsiveness to a Pandemic Alert: Use of Reverse Genetics for Rapid Development of Influenza Vaccines.
    Date May 2004
    Journal Lancet
    Excerpt

    BACKGROUND: In response to the emergence of severe infection capable of rapid global spread, WHO will issue a pandemic alert. Such alerts are rare; however, on Feb 19, 2003, a pandemic alert was issued in response to human infections caused by an avian H5N1 influenza virus, A/Hong Kong/213/03. H5N1 had been noted once before in human beings in 1997 and killed a third (6/18) of infected people. The 2003 variant seemed to have been transmitted directly from birds to human beings and caused fatal pneumonia in one of two infected individuals. Candidate vaccines were sought, but no avirulent viruses antigenically similar to the pathogen were available, and the isolate killed embryonated chicken eggs. Since traditional strategies of vaccine production were not viable, we sought to produce a candidate reference virus using reverse genetics. METHODS: We removed the polybasic aminoacids that are associated with high virulence from the haemagglutinin cleavage site of A/Hong Kong/213/03 using influenza reverse genetics techniques. A reference vaccine virus was then produced on an A/Puerto Rico/8/34 (PR8) backbone on WHO-approved Vero cells. We assessed this reference virus for pathogenicity in in-vivo and in-vitro assays. FINDINGS: A reference vaccine virus was produced in Good Manufacturing Practice (GMP)-grade facilities in less than 4 weeks from the time of virus isolation. This virus proved to be non-pathogenic in chickens and ferrets and was shown to be stable after multiple passages in embryonated chicken eggs. INTERPRETATION: The ability to produce a candidate reference virus in such a short period of time sets a new standard for rapid response to emerging infectious disease threats and clearly shows the usefulness of reverse genetics for influenza vaccine development. The same technologies and procedures are currently being used to create reference vaccine viruses against the 2004 H5N1 viruses circulating in Asia.

    Title Fertility and Taxon-specific Sperm Binding Persist After Replacement of Mouse Sperm Receptors with Human Homologs.
    Date September 2003
    Journal Developmental Cell
    Excerpt

    The zona pellucida surrounding ovulated mouse eggs contains three glycoproteins, two of which (ZP2 and ZP3) are reported sperm receptors. After fertilization, the zona pellucida is modified ad minimus by cleavage of ZP2, and sperm no longer bind. Crosstaxa sperm binding is limited among mammals, and human sperm do not bind to mouse eggs. Using transgenesis to replace mouse ZP2 and/or ZP3 with human homologs, mouse lines with human-mouse chimeric zonae pellucidae have been established. Unexpectedly, mouse, but not human, sperm bind to huZP2 and huZP2/huZP3 rescue eggs, eggs fertilized in vitro with mouse sperm progress to two-cell embryos, and rescue mice are fertile. Also unanticipated, human ZP2 remains uncleaved after fertilization, and mouse sperm continue to bind early rescue embryos. These observations are consistent with a model in which the supramolecular structure of the zona pellucida necessary for sperm binding is modulated by the cleavage status of ZP2.

    Title Experimental Evidence Against Diffusion Control of Hg Evasion from Soils.
    Date May 2003
    Journal The Science of the Total Environment
    Excerpt

    Elemental Hg (Hg(0)) evolution from soils can be an important process and needs to be measured in more ecosystems. The diffusion model for soil gaseous efflux has been applied to modeling the fluxes of several gases in soils and deserves testing with regard to Hg(0). As an initial test of this model, we examined soil gaseous Hg(0) and CO(2) concentrations at two depths (20 and 40 cm) over the course of a controlled environment study conducted in the EcoCELLs at the Desert Research Institute in Reno, Nevada. We also compared small, spatially distributed gas wells against the more commonly used large gas wells. In this study, two EcoCELLs were first watered (June 2000) and then planted (July 2000) with trembling aspen (Populus tremuloides). Following that, trees were harvested (October 2000) and one EcoCELL (EcoCELL 2) was replanted with aspen (25 April 2001). During most of the experiment, there was a strong vertical gradient of CO(2) (increasing with depth, as is typical of a diffusion-driven process), but no vertical gradient of soil gaseous Hg(0). Strong diel variations in soil gas Hg(0) concentration were noted, whereas diel variations in CO(2) were small and not statistically significant. Initial watering and planting caused increases in both soil gas CO(2) and Hg(0). Replanting in EcoCELL 2 caused a statistically significant increase in soil gas CO(2) but not Hg(0). Calculated Hg(0) effluxes using the diffusion model produced values two orders of magnitude lower than those measured using field chambers placed directly on the soil or whole-cell fluxes. Neither soil gas Hg(0) concentrations nor calculated fluxes were correlated with measured Hg(0) efflux from soil or from whole EcoCELLs. We conclude that (1) soil gas Hg(0) flux is not diffusion-driven and thus soil gas Hg(0) concentrations cannot be used to calculated soil Hg(0) efflux; (2) soil gas Hg(0) concentrations are increased by watering dry soil, probably because of displacement/desorption processes; (3) soil gas Hg(0) concentrations were unaffected by plants, suggesting that roots and rhizosphere processes are unimportant in controlling Hg(0) evasion from the soil surface. We recommend the use of the small wells in all future studies because they are much easier to install and provide more resolution of spatial and temporal patterns in soil gaseous Hg(0).

    Title Organic or Functional? A New Case of Foreign Accent Syndrome.
    Date July 2002
    Journal Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
    Title Elevated Co2 Increases Productivity and Invasive Species Success in an Arid Ecosystem.
    Date December 2000
    Journal Nature
    Excerpt

    Arid ecosystems, which occupy about 20% of the earth's terrestrial surface area, have been predicted to be one of the most responsive ecosystem types to elevated atmospheric CO2 and associated global climate change. Here we show, using free-air CO2 enrichment (FACE) technology in an intact Mojave Desert ecosystem, that new shoot production of a dominant perennial shrub is doubled by a 50% increase in atmospheric CO2 concentration in a high rainfall year. However, elevated CO2 does not enhance production in a drought year. We also found that above-ground production and seed rain of an invasive annual grass increases more at elevated CO2 than in several species of native annuals. Consequently, elevated CO2 might enhance the long-term success and dominance of exotic annual grasses in the region. This shift in species composition in favour of exotic annual grasses, driven by global change, has the potential to accelerate the fire cycle, reduce biodiversity and alter ecosystem function in the deserts of western North America.

    Title The Small, Methionine-rich Chloroplast Heat-shock Protein Protects Photosystem Ii Electron Transport During Heat Stress.
    Date March 1998
    Journal Plant Physiology
    Excerpt

    Evidence suggests that the small chloroplast heat-shock protein (Hsp) is involved in plant thermotolerance but its site of action is unknown. Functional disruption of this Hsp using anti-Hsp antibodies or addition of purified Hsp to chloroplasts indicated that (a) this Hsp protects thermolabile photosystem II and, consequently, whole-chain electron transport during heat stress; and (b) this Hsp completely accounted for heat acclimation of electron transport in pre-heat-stressed plants. Therefore, this Hsp is a major adaptation to acute heat stress in plants.

    Title Monitoring the Aids Epidemic in the United States: a Network Approach.
    Date July 1989
    Journal Science (new York, N.y.)
    Excerpt

    Respondents in the 1988 General Social Survey (GSS) were asked to scan their acquaintance networks to identify all those who had been a victim of a homicide or had acquired immunodeficiency syndrome (AIDS). Estimates of the sex, race, age, and regional breakdowns for homicides in the last year and for people with AIDS were compared with official statistics. The GSS estimates for the distribution of homicide victims replicate the official statistics quite well. The GSS estimates for AIDS cases suggest that the data provided to the Centers for Disease Control may underestimate by a substantial margin the prevalence of AIDS in the white population of higher socioeconomic status, overstate the relative prevalence of the disease in the minority populations, underestimate the prevalence of the disease in the Midwest, and overstate it for the East.

    Title Regulation of Acetyl-coa Synthetase of Saccharomyces Cerevisiae.
    Date August 1976
    Journal Canadian Journal of Microbiology
    Excerpt

    Acetyl-coenzyme A synthetase (EC 6.2.1.1) activity of Saccharomyces cerevisiae was determined by a radioactive assay procedure. The activity in vitro was inhibited significantly by NADPH, NADH, or AMP and to a lesser extent by NADP, NAD, or ADP. Glutamic acid and alpha-ketoglutaric acid were not inhibitory. The enzyme level was repressed when the cells were grown in a complex nutrient medium as opposed to the minimal medium. However, a glutamic acid auxotroph glul, when grown in excess glutamic acid, demonstrated a fivefold increase of acetyl-CoA synthetase.

    Title Regulation of Citrate Synthase Activity of Saccharomyces Cerevisiae.
    Date March 1976
    Journal Antonie Van Leeuwenhoek
    Excerpt

    Citrate synthase activity of Saccharomyces cerevisiae was determined by a radioactive assay procedure and the reaction product, 14C-citric acid, was identified by chromatographic techniques. ATP, d-ATP, GTP and NADH were most inhibitory to the citrate synthase invitro. The activity was inhibited to a lesser extent by ADP, UTP, and NADP whereas, AMP and CTP were much less inhibitory. NADH, like NAD, glutamic acid, glutamine, arginine, ornithine, proline, aspartic acid and alpha-ketoglutarate exhibited no inhibition. These results have been discussed in the light of the role of citrate synthase for the energy metabolism and glutamic acid biosynthesis.

    Title Iterpretations of Adolescent Culture.
    Date January 1971
    Journal Proceedings of the Annual Meeting of the American Psychopathological Association
    Title Separation of Anionic Chromium (3) Thiocyanate Complexes by Displacement Analysis.
    Date September 1968
    Journal Journal of Chromatography
    Title Foundations for a Theory of Collective Decisions.
    Date July 1966
    Journal Ajs; American Journal of Sociology
    Title Critical Phenomena and Self-similarity in the Gravitational Collapse of Radiation Fluid.
    Date
    Journal Physical Review Letters
    Title Heat-shock Proteins Are Induced in Unstressed Leaves of Nicotiana Attenuata (solanaceae) when Distant Leaves Are Stressed.
    Date
    Journal American Journal of Botany
    Excerpt

    In Nicotiana attenuata, systemic induction of heat-shock proteins (Hsps) was detected in response to the treatment of single leaves by either heat shock, mechanical damage, or exogenous application of methyl jasmonate (MJ). All treatments increased the abundance of members of the 70-kD Hsp (Hsp70) family and induced synthesis of one or more of the small Hsps (sHsp) (16-23 kD) in both treated and untreated leaves. These results provide the first evidence that Hsps can be systemically induced in plants and suggest that systemic induction of Hsps may be important in pre-adapting leaves to stress.

    Title Molecular, Physiological, and Growth Responses to Sodium Stress in C(4) Grasses from a Soil Salinity Gradient in the Serengeti Ecosystem.
    Date
    Journal American Journal of Botany
    Excerpt

    The concentration of soil sodium (Na) is an important factor that influences species distribution in the Serengeti short-grass plains, Tanzania. Experiments were conducted to characterize physiological (growth, photosynthetic, nutrients, and water relations) and molecular (heat shock proteins and organic solutes) responses to high soil sodium in four Serengeti C(4) grasses. The species tested were Andropogon greenwayi and three species of Sporobulus, S. ioclados, S. kentrophyllus and S. spicatus. Andropogon greenwayi occurs on locations with low soil Na concentrations, S. ioclados on low to moderate, S. kentrophyllus moderate to high, and S. spicatus on soils with high Na concentration. Among all four species, short-term physiological and molecular responses to Na treatments (0, 100, and 400 mmol/L Na) were correlated with their field soil Na concentrations. Sporobulus kentrophyllus and S. spicatus exhibited rapid molecular induction of heat shock proteins in response to experimental soil Na treatments within 24 h and had increased levels of proline within 96 h in contrast to A. greenwayi and S. ioclados. Photosynthetic rates and water relations were positively correlated with field soil Na concentrations and Hsp induction was clearly associated with photosynthetic tolerance. Long-term (6 wk) responses of the four species to Na treatment were consistent with the short-term responses to Na. Species that occur on low Na soils in the field did not survive past week 1 when treated with 400 mmol/L Na and exhibited significant reductions in biomass when treated with 100 mmol/L Na. Reduced biomass was associated with increased shoot tissue Na concentrations, and thus Na tolerance correlated with the Na concentrations of field leaf tissue. The results demonstrate that the community distribution of these species reflects their Na tolerance and that the observed physiological and molecular responses in tolerant species may have adaptive significance.

    Title Leaf Development and Leaf Stress: Increased Susceptibility Associated with Sink-source Transition.
    Date
    Journal Tree Physiology
    Excerpt

    Relationships between leaf age and leaf susceptibility to biotic and abiotic stress agents have been studied, but unifying concepts relating leaf ontogeny to stress susceptibility are not well developed. Leaves go through predictable and orderly physiological stages as they progress from metabolite sinks to metabolite sources and then become senescent. During this process, they may pass through a stage of maximum susceptibility to a given stress. It is proposed that, for many leaf stresses, this stage occurs at the time of the sink-source transition and can be related to anatomical, physiological and biochemical leaf ontogeny. This concept may be useful in relating host-plant growth habit and leaf production pattern to the distribution and abundance of herbivores and leaf pathogens.

    Title Prolonged Suppression of Ecosystem Carbon Dioxide Uptake After an Anomalously Warm Year.
    Date
    Journal Nature
    Excerpt

    Terrestrial ecosystems control carbon dioxide fluxes to and from the atmosphere through photosynthesis and respiration, a balance between net primary productivity and heterotrophic respiration, that determines whether an ecosystem is sequestering carbon or releasing it to the atmosphere. Global and site-specific data sets have demonstrated that climate and climate variability influence biogeochemical processes that determine net ecosystem carbon dioxide exchange (NEE) at multiple timescales. Experimental data necessary to quantify impacts of a single climate variable, such as temperature anomalies, on NEE and carbon sequestration of ecosystems at interannual timescales have been lacking. This derives from an inability of field studies to avoid the confounding effects of natural intra-annual and interannual variability in temperature and precipitation. Here we present results from a four-year study using replicate 12,000-kg intact tallgrass prairie monoliths located in four 184-m(3) enclosed lysimeters. We exposed 6 of 12 monoliths to an anomalously warm year in the second year of the study and continuously quantified rates of ecosystem processes, including NEE. We find that warming decreases NEE in both the extreme year and the following year by inducing drought that suppresses net primary productivity in the extreme year and by stimulating heterotrophic respiration of soil biota in the subsequent year. Our data indicate that two years are required for NEE in the previously warmed experimental ecosystems to recover to levels measured in the control ecosystems. This time lag caused net ecosystem carbon sequestration in previously warmed ecosystems to be decreased threefold over the study period, compared with control ecosystems. Our findings suggest that more frequent anomalously warm years, a possible consequence of increasing anthropogenic carbon dioxide levels, may lead to a sustained decrease in carbon dioxide uptake by terrestrial ecosystems.

    Title Interpreting Phenotypic Variation in Plants.
    Date
    Journal Trends in Ecology & Evolution (personal Edition)
    Excerpt

    Plant ecologists and evolutionary biologists frequently examine patterns of phenotypic variation across variable environments or genetic identities. Too often, we ignore the fact that most phenotypic traits change throughout growth and development of individual plants, and that rates of growth and development are highly variable. Plants growing in different environments are likely to grow at different rates, and will be of different sizes and stages of development at a particular age. When we compare plants as a function of plant size or developmental stage, as well as a function of age, we broaden our understanding of phenotypic variation between plants.

    Title Heat-shock Proteins and Thermotolerance: Linking Molecular and Ecological Perspectives.
    Date
    Journal Trends in Ecology & Evolution (personal Edition)

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