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Gassen J, Mengelkoch S, Slavich GM. Human immune and metabolic biomarker levels, and stress-biomarker associations, differ by season: Implications for biomedical health research. Brain Behav Immun Health 2024; 38:100793. [PMID: 38813082 PMCID: PMC11133497 DOI: 10.1016/j.bbih.2024.100793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Accepted: 05/02/2024] [Indexed: 05/31/2024] Open
Abstract
Although seasonal changes in physiology are well documented, little is known about how human immune and metabolic markers vary across seasons, and no studies have examined how stress → health biomarker associations differ across the year. To investigate these issues, we analyzed data from 2118 participants of the Midlife in the United States (MIDUS) study to determine whether there were differences in (a) levels of 19 immune and metabolic markers, and (b) the association between perceived stress and each biomarker across the year. Results of component-wide boosted generalized additive models revealed seasonal patterning for most biomarkers, with immune proteins generally peaking when days were shorter. Moreover, whereas levels of hemoglobin A1C rose from late fall to spring, triglycerides were elevated in the summer and fall, and high-density lipoprotein decreased steadily from January to December. Urinary cortisol and cortisone exhibited opposite patterns, peaking at the beginning and end of the year, respectively. Most critically, we found that the effects of perceived stress on 18 of the 19 health biomarkers assessed varied by month of measurement. In some cases, these differences involved the magnitude of the stress → biomarker association but, in other cases, it was the direction of the effect that changed. Studies that do not account for month of biomarker assessment may thus yield misleading or unreproducible results.
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Affiliation(s)
- Jeffrey Gassen
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA, USA
| | - Summer Mengelkoch
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA, USA
| | - George M. Slavich
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA, USA
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2
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Paijmans AJ, Berthelsen AL, Nagel R, Christaller F, Kröcker N, Forcada J, Hoffman JI. Little evidence of inbreeding depression for birth mass, survival and growth in Antarctic fur seal pups. Sci Rep 2024; 14:12610. [PMID: 38824161 DOI: 10.1038/s41598-024-62290-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 05/15/2024] [Indexed: 06/03/2024] Open
Abstract
Inbreeding depression, the loss of offspring fitness due to consanguineous mating, is generally detrimental for individual performance and population viability. We investigated inbreeding effects in a declining population of Antarctic fur seals (Arctocephalus gazella) at Bird Island, South Georgia. Here, localised warming has reduced the availability of the seal's staple diet, Antarctic krill, leading to a temporal increase in the strength of selection against inbred offspring, which are increasingly failing to recruit into the adult breeding population. However, it remains unclear whether selection operates before or after nutritional independence at weaning. We therefore used microsatellite data from 885 pups and their mothers, and SNP array data from 98 mother-offspring pairs, to quantify the effects of individual and maternal inbreeding on three important neonatal fitness traits: birth mass, survival and growth. We did not find any clear or consistent effects of offspring or maternal inbreeding on any of these traits. This suggests that selection filters inbred individuals out of the population as juveniles during the time window between weaning and recruitment. Our study brings into focus a poorly understood life-history stage and emphasises the importance of understanding the ecology and threats facing juvenile pinnipeds.
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Affiliation(s)
- A J Paijmans
- Department of Evolutionary Population Genetics, Bielefeld University, 33615, Bielefeld, Germany.
- Department of Animal Behaviour, Bielefeld University, 33501, Bielefeld, Germany.
| | - A L Berthelsen
- Department of Evolutionary Population Genetics, Bielefeld University, 33615, Bielefeld, Germany
- Department of Animal Behaviour, Bielefeld University, 33501, Bielefeld, Germany
| | - R Nagel
- Department of Evolutionary Population Genetics, Bielefeld University, 33615, Bielefeld, Germany
- Department of Animal Behaviour, Bielefeld University, 33501, Bielefeld, Germany
- Centre for Biological Diversity, University of St. Andrews, St Andrews, KY16 9TH, UK
| | - F Christaller
- Department of Evolutionary Population Genetics, Bielefeld University, 33615, Bielefeld, Germany
- Department of Animal Behaviour, Bielefeld University, 33501, Bielefeld, Germany
| | - N Kröcker
- Department of Evolutionary Population Genetics, Bielefeld University, 33615, Bielefeld, Germany
- Department of Animal Behaviour, Bielefeld University, 33501, Bielefeld, Germany
| | - J Forcada
- British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 OET, UK
| | - J I Hoffman
- Department of Evolutionary Population Genetics, Bielefeld University, 33615, Bielefeld, Germany
- Department of Animal Behaviour, Bielefeld University, 33501, Bielefeld, Germany
- British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 OET, UK
- Joint Institute for Individualisation in a Changing Environment (JICE), Bielefeld University and University of Münster, Bielefeld, Germany
- Center for Biotechnology (CeBiTec), Faculty of Biology, Bielefeld University, 33615, Bielefeld, Germany
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3
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Marraffini ML, Hamilton SL, Marin Jarrin JR, Ladd M, Koval G, Madden JR, Mangino I, Parker LM, Emery KA, Terhaar K, Hubbard DM, Miller RJ, Dugan JE. Evaluating the influence of marine protected areas on surf zone fish. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2024:e14296. [PMID: 38770838 DOI: 10.1111/cobi.14296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 01/31/2024] [Accepted: 03/05/2024] [Indexed: 05/22/2024]
Abstract
Marine protected areas (MPAs) globally serve conservation and fisheries management goals, generating positive effects in some marine ecosystems. Surf zones and sandy beaches, critical ecotones bridging land and sea, play a pivotal role in the life cycles of numerous fish species and serve as prime areas for subsistence and recreational fishing. Despite their significance, these areas remain understudied when evaluating the effects of MPAs. We compared surf zone fish assemblages inside and outside MPAs across 3 bioregions in California (USA). Using seines and baited remote underwater videos (BRUVs), we found differences in surf zone fish inside and outside MPAs in one region. Inside south region MPAs, we observed higher abundance (Tukey's honest significant difference [HSD] = 0.83, p = 0.0001) and richness (HSD = 0.22, p = 0.0001) in BRUVs and greater biomass (HSD = 0.32, p = 0.0002) in seine surveys compared with reference sites. Selected live-bearing, fished taxa were positively affected by MPAs. Elasmobranchs displayed greater abundance in BRUV surveys and higher biomass in seine surveys inside south region MPAs (HSD = 0.35, p = 0.0003 and HSD = 0.23, p = 0.008, respectively). Although we observed no overall MPA signal for Embiotocidae, abundances of juvenile and large adult barred surfperch (Amphistichus argenteus), the most abundant fished species, were higher inside MPAs (K-S test D = 0.19, p < 0.0001). Influence of habitat characteristics on MPA performance indicated surf zone width was positively associated with fish abundance and biomass but negatively associated with richness. The south region had the largest positive effect size on all MPA performance metrics. Our findings underscored the variability in species richness and composition across regions and survey methods that significantly affected differences observed inside and outside MPAs. A comprehensive assessment of MPA performance should consider specific taxa, their distribution, and the effects of habitat factors and geography.
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Affiliation(s)
- M L Marraffini
- Marine Science Institute, University of California, Santa Barbara, Santa Barbara, California, USA
| | - S L Hamilton
- Moss Landing Marine Laboratories, San Jose State University, Moss Landing, California, USA
| | - J R Marin Jarrin
- Department of Fisheries Biology, California State Polytechnic University, Humboldt, Arcata, California, USA
| | - M Ladd
- Southeast Fisheries Science Center, NOAA-National Marine Fisheries Service, Miami, Florida, USA
| | - G Koval
- Moss Landing Marine Laboratories, San Jose State University, Moss Landing, California, USA
| | - J R Madden
- Marine Science Institute, University of California, Santa Barbara, Santa Barbara, California, USA
| | - I Mangino
- Marine Science Institute, University of California, Santa Barbara, Santa Barbara, California, USA
| | - L M Parker
- Marine Science Institute, University of California, Santa Barbara, Santa Barbara, California, USA
- Moss Landing Marine Laboratories, San Jose State University, Moss Landing, California, USA
| | - K A Emery
- Marine Science Institute, University of California, Santa Barbara, Santa Barbara, California, USA
- Department of Geography, University of California, Los Angeles, Los Angeles, California, USA
| | - K Terhaar
- Department of Fisheries Biology, California State Polytechnic University, Humboldt, Arcata, California, USA
| | - D M Hubbard
- Marine Science Institute, University of California, Santa Barbara, Santa Barbara, California, USA
| | - R J Miller
- Marine Science Institute, University of California, Santa Barbara, Santa Barbara, California, USA
| | - J E Dugan
- Marine Science Institute, University of California, Santa Barbara, Santa Barbara, California, USA
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4
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Arnillas CA, Carscadden K. When indices disagree: facing conceptual and practical challenges. Trends Ecol Evol 2024:S0169-5347(24)00038-7. [PMID: 38508921 DOI: 10.1016/j.tree.2024.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 01/29/2024] [Accepted: 02/02/2024] [Indexed: 03/22/2024]
Abstract
Hypothesis testing requires meaningful ways to quantify biological phenomena and account for alternative mechanisms that could explain the same pattern. Researchers combine experiments, statistics, and indices to account for these confounding mechanisms. Key concepts in ecology and evolution, such as niche breadth (NB) or fitness, can be represented by several indices, which often provide uncorrelated estimates. Is this because the indices use different types of noisy data or because the targeted phenomenon is complex and multidimensional? We discuss implications of these scenarios and propose five steps to aid researchers in identifying and combining indices, experiments, and statistics. Building on prior efforts to construct databases of hypotheses and indices and document assumptions, these steps help provide a formal strategy to reduce self-confirmatory bias.
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Affiliation(s)
- Carlos Alberto Arnillas
- Department of Physical and Environmental Sciences, University of Toronto - Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada.
| | - Kelly Carscadden
- Department of Ecology and Evolutionary Biology, University of Colorado Boulder, 1900 Pleasant Street, Box 334, Boulder, CO 80309, USA
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Sen S, Potnuru PP, Hernandez N, Goehl C, Praestholm C, Sridhar S, Nwokolo OO. Glucagon-Like Peptide-1 Receptor Agonist Use and Residual Gastric Content Before Anesthesia. JAMA Surg 2024:2815663. [PMID: 38446466 PMCID: PMC10918573 DOI: 10.1001/jamasurg.2024.0111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 12/31/2023] [Indexed: 03/07/2024]
Abstract
Importance Glucagon-like peptide-1 receptor agonist (GLP-1 RA) use is rapidly increasing in the US, driven by its expanded approval for weight management in addition to hyperglycemia management in patients with type 2 diabetes. The perioperative safety of these medications, particularly with aspiration risk under anesthesia, is uncertain. Objective To assess the association between GLP-1 RA use and prevalence of increased residual gastric content (RGC), a major risk factor for aspiration under anesthesia, using gastric ultrasonography. Design, Setting, and Participants This cross-sectional study prospectively enrolled patients from a large, tertiary, university-affiliated hospital from June 6 through July 12, 2023. Participants followed preprocedural fasting guidelines before an elective procedure under anesthesia. Patients with altered gastric anatomy (eg, from previous gastric surgery), pregnancy, recent trauma (<1 month), or an inability to lie in the right lateral decubitus position for gastric ultrasonography were excluded. Exposure Use of a once-weekly GLP-1 RA. Main Outcomes and Measures The primary outcome was the presence of increased RGC, defined by the presence of solids, thick liquids, or more than 1.5 mL/kg of clear liquids on gastric ultrasonography. Analysis was adjusted for confounders using augmented inverse probability of treatment weighting, a propensity score-based technique. Secondarily, the association between the duration of drug interruption and the prevalence of increased RGC was explored. Results Among the 124 participants (median age, 56 years [IQR, 46-65 years]; 75 [60%] female), the prevalence of increased RGC was 56% (35 of 62) in patients with GLP-1 RA use (exposure group) compared with 19% (12 of 62) in patients who were not taking a GLP-1 RA drug (control group). After adjustment for confounding, GLP-1 RA use was associated with a 30.5% (95% CI, 9.9%-51.2%) higher prevalence of increased RGC (adjusted prevalence ratio, 2.48; 95% CI, 1.23-4.97). There was no association between the duration of GLP-1 RA interruption and the prevalence of increased RGC (adjusted odds ratio, 0.86; 95% CI, 0.65-1.14). Conclusions and Relevance Use of a GLP-1 RA was independently associated with increased RGC on preprocedural gastric ultrasonography. The findings suggest that the preprocedural fasting duration suggested by current guidelines may be inadequate in this group of patients at increased risk of aspiration under anesthesia.
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Affiliation(s)
- Sudipta Sen
- Department of Anesthesiology, Critical Care and Pain Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston
| | - Paul P. Potnuru
- Department of Anesthesiology, Critical Care and Pain Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston
| | - Nadia Hernandez
- Department of Anesthesiology, Critical Care and Pain Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston
| | - Christina Goehl
- Department of Anesthesiology, Critical Care and Pain Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston
| | - Caroline Praestholm
- McGovern Medical School, The University of Texas Health Science Center at Houston
| | - Srikanth Sridhar
- Department of Anesthesiology, Critical Care and Pain Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston
| | - Omonele O. Nwokolo
- Department of Anesthesiology, Critical Care and Pain Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston
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Hülsmann L, Chisholm RA, Comita L, Visser MD, de Souza Leite M, Aguilar S, Anderson-Teixeira KJ, Bourg NA, Brockelman WY, Bunyavejchewin S, Castaño N, Chang-Yang CH, Chuyong GB, Clay K, Davies SJ, Duque A, Ediriweera S, Ewango C, Gilbert GS, Holík J, Howe RW, Hubbell SP, Itoh A, Johnson DJ, Kenfack D, Král K, Larson AJ, Lutz JA, Makana JR, Malhi Y, McMahon SM, McShea WJ, Mohamad M, Nasardin M, Nathalang A, Norden N, Oliveira AA, Parmigiani R, Perez R, Phillips RP, Pongpattananurak N, Sun IF, Swanson ME, Tan S, Thomas D, Thompson J, Uriarte M, Wolf AT, Yao TL, Zimmerman JK, Zuleta D, Hartig F. Latitudinal patterns in stabilizing density dependence of forest communities. Nature 2024; 627:564-571. [PMID: 38418889 PMCID: PMC10954553 DOI: 10.1038/s41586-024-07118-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Accepted: 01/25/2024] [Indexed: 03/02/2024]
Abstract
Numerous studies have shown reduced performance in plants that are surrounded by neighbours of the same species1,2, a phenomenon known as conspecific negative density dependence (CNDD)3. A long-held ecological hypothesis posits that CNDD is more pronounced in tropical than in temperate forests4,5, which increases community stabilization, species coexistence and the diversity of local tree species6,7. Previous analyses supporting such a latitudinal gradient in CNDD8,9 have suffered from methodological limitations related to the use of static data10-12. Here we present a comprehensive assessment of latitudinal CNDD patterns using dynamic mortality data to estimate species-site-specific CNDD across 23 sites. Averaged across species, we found that stabilizing CNDD was present at all except one site, but that average stabilizing CNDD was not stronger toward the tropics. However, in tropical tree communities, rare and intermediate abundant species experienced stronger stabilizing CNDD than did common species. This pattern was absent in temperate forests, which suggests that CNDD influences species abundances more strongly in tropical forests than it does in temperate ones13. We also found that interspecific variation in CNDD, which might attenuate its stabilizing effect on species diversity14,15, was high but not significantly different across latitudes. Although the consequences of these patterns for latitudinal diversity gradients are difficult to evaluate, we speculate that a more effective regulation of population abundances could translate into greater stabilization of tropical tree communities and thus contribute to the high local diversity of tropical forests.
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Affiliation(s)
- Lisa Hülsmann
- Ecosystem Analysis and Simulation (EASI) Lab, University of Bayreuth, Bayreuth, Germany.
- Theoretical Ecology, University of Regensburg, Regensburg, Germany.
- Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany.
| | - Ryan A Chisholm
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
| | - Liza Comita
- School of the Environment, Yale University, New Haven, CT, USA
- Smithsonian Tropical Research Institute, Panama City, Panama
| | - Marco D Visser
- Institute of Environmental Sciences, Leiden University, Leiden, The Netherlands
| | | | - Salomon Aguilar
- Forest Global Earth Observatory, Smithsonian Tropical Research Institute, Panama City, Panama
| | - Kristina J Anderson-Teixeira
- Forest Global Earth Observatory, Smithsonian Tropical Research Institute, Panama City, Panama
- Conservation Ecology Center, Smithsonian's National Zoo & Conservation Biology Institute, Front Royal, VA, USA
| | - Norman A Bourg
- Conservation Ecology Center, Smithsonian's National Zoo & Conservation Biology Institute, Front Royal, VA, USA
| | - Warren Y Brockelman
- National Biobank of Thailand (NBT), National Science and Technology Development Agency, Bangkok, Thailand
- Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom, Thailand
| | - Sarayudh Bunyavejchewin
- Thai Long Term Forest Ecological Research Project, Department of Forest Biology, Faculty of Forestry, Kasetsart University, Bangkok, Thailand
| | - Nicolas Castaño
- Instituto Amazónico de Investigaciones Científicas Sinchi, Bogotá, Colombia
| | - Chia-Hao Chang-Yang
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | | | - Keith Clay
- Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, LA, USA
| | - Stuart J Davies
- Forest Global Earth Observatory, Smithsonian Tropical Research Institute, Washington, DC, USA
| | - Alvaro Duque
- Departamento de Ciencias Forestales, Universidad Nacional de Colombia Sede Medellín, Medellín, Colombia
| | - Sisira Ediriweera
- Department of Science and Technology, Uva Wellassa University, Badulla, Sri Lanka
| | | | - Gregory S Gilbert
- Environmental Studies Department, University of California, Santa Cruz, Santa Cruz, CA, USA
| | - Jan Holík
- Department of Forest Ecology, Silva Tarouca Research Institute, Brno, Czech Republic
| | - Robert W Howe
- Cofrin Center for Biodiversity, Department of Biology, University of Wisconsin-Green Bay, Green Bay, WI, USA
| | - Stephen P Hubbell
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Akira Itoh
- Graduate School of Science, Osaka Metropolitan University, Osaka, Japan
| | - Daniel J Johnson
- School of Forest, Fisheries, and Geomatics Sciences, University of Florida, Gainesville, FL, USA
| | - David Kenfack
- Global Earth Observatory (ForestGEO), Smithsonian Tropical Research Institute, Washington, DC, USA
| | - Kamil Král
- Department of Forest Ecology, Silva Tarouca Research Institute, Brno, Czech Republic
| | - Andrew J Larson
- Department of Forest Management, University of Montana, Missoula, MT, USA
- Wilderness Institute, University of Montana, Missoula, MT, USA
| | - James A Lutz
- Department of Wildland Resources, Utah State University, Logan, UT, USA
| | | | - Yadvinder Malhi
- Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, UK
| | - Sean M McMahon
- Forest Global Earth Observatory, Smithsonian Tropical Research Institute, Washington, DC, USA
- Smithsonian Environmental Research Center, Edgewater, MD, USA
| | - William J McShea
- Conservation Ecology Center, Smithsonian's National Zoo & Conservation Biology Institute, Front Royal, VA, USA
| | | | | | - Anuttara Nathalang
- National Biobank of Thailand (NBT), National Science and Technology Development Agency, Bangkok, Thailand
| | - Natalia Norden
- Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, Bogotá, Colombia
| | | | - Renan Parmigiani
- Department of Ecology, University of São Paulo, São Paulo, Brazil
| | - Rolando Perez
- Forest Global Earth Observatory, Smithsonian Tropical Research Institute, Panama City, Panama
| | | | | | - I-Fang Sun
- Department of Natural Resources and Environmental Studies, National Donghwa University, Hualien, Taiwan
| | - Mark E Swanson
- School of the Environment, Washington State University, Pullman, WA, USA
| | | | - Duncan Thomas
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, USA
| | - Jill Thompson
- UK Centre for Ecology & Hydrology, Bush Estate, Penicuik, UK
| | - Maria Uriarte
- Department of Ecology, Evolution & Environmental Biology, Columbia University, New York, NY, USA
| | - Amy T Wolf
- Department of Biology, University of Wisconsin-Green Bay, Green Bay, WI, USA
| | - Tze Leong Yao
- Forest Research Institute Malaysia, Kepong, Malaysia
| | - Jess K Zimmerman
- Department of Environmental Science, University of Puerto Rico, Rio Piedras, USA
| | - Daniel Zuleta
- Forest Global Earth Observatory, Smithsonian Tropical Research Institute, Washington, DC, USA
| | - Florian Hartig
- Theoretical Ecology, University of Regensburg, Regensburg, Germany
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Semnani-Azad Z, Gaillard R, Hughes AE, Boyle KE, Tobias DK, Perng W. Precision stratification of prognostic risk factors associated with outcomes in gestational diabetes mellitus: a systematic review. COMMUNICATIONS MEDICINE 2024; 4:9. [PMID: 38216688 PMCID: PMC10786838 DOI: 10.1038/s43856-023-00427-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 12/12/2023] [Indexed: 01/14/2024] Open
Abstract
BACKGROUND The objective of this systematic review is to identify prognostic factors among women and their offspring affected by gestational diabetes mellitus (GDM), focusing on endpoints of cardiovascular disease (CVD) and type 2 diabetes (T2D) for women, and cardiometabolic profile for offspring. METHODS This review included studies published in English language from January 1st, 1990, through September 30th, 2021, that focused on the above outcomes of interest with respect to sociodemographic factors, lifestyle and behavioral characteristics, traditional clinical traits, and 'omics biomarkers in the mothers and offspring during the perinatal/postpartum periods and across the lifecourse. Studies that did not report associations of prognostic factors with outcomes of interest among GDM-exposed women or children were excluded. RESULTS Here, we identified 109 publications comprising 98 observational studies and 11 randomized-controlled trials. Findings indicate that GDM severity, maternal obesity, race/ethnicity, and unhealthy diet and physical activity levels predict T2D and CVD in women, and greater cardiometabolic risk in offspring. However, using the Diabetes Canada 2018 Clinical Practice Guidelines for studies, the level of evidence was low due to potential for confounding, reverse causation, and selection biases. CONCLUSIONS GDM pregnancies with greater severity, as well as those accompanied by maternal obesity, unhealthy diet, and low physical activity, as well as cases that occur among women who identify as racial/ethnic minorities are associated with worse cardiometabolic prognosis in mothers and offspring. However, given the low quality of evidence, prospective studies with detailed covariate data collection and high fidelity of follow-up are warranted.
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Affiliation(s)
- Zhila Semnani-Azad
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
| | - Romy Gaillard
- Department of Pediatrics, Erasmus MC, University Medical Center, Rotterdam, the Netherlands
| | - Alice E Hughes
- Faculty of Health and Life Sciences, University of Exeter Medical School, Exeter, UK
| | - Kristen E Boyle
- Department of Pediatrics and the Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Deirdre K Tobias
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Wei Perng
- Department of Epidemiology and the Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
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8
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Lewthwaite JMM, Baiotto TM, Brown BV, Cheung YY, Baker AJ, Lehnen C, McGlynn TP, Shirey V, Gonzalez L, Hartop E, Kerr PH, Wood E, Guzman LM. Drivers of arthropod biodiversity in an urban ecosystem. Sci Rep 2024; 14:390. [PMID: 38172148 PMCID: PMC10764344 DOI: 10.1038/s41598-023-50675-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 12/22/2023] [Indexed: 01/05/2024] Open
Abstract
Our world is becoming increasingly urbanized with a growing human population concentrated around cities. The expansion of urban areas has important consequences for biodiversity, yet the abiotic drivers of biodiversity in urban ecosystems have not been well characterized for the most diverse group of animals on the planet, arthropods. Given their great diversity, comparatively small home ranges, and ability to disperse, arthropods make an excellent model for studying which factors can most accurately predict urban biodiversity. We assessed the effects of (i) topography (distance to natural areas and to ocean) (ii) abiotic factors (mean annual temperature and diurnal range), and (iii) anthropogenic drivers (land value and amount of impervious surface) on the occurrence of six arthropod groups represented in Malaise trap collections run by the BioSCAN project across the Greater Los Angeles Area. We found striking heterogeneity in responses to all factors both within and between taxonomic groups. Diurnal temperature range had a consistently negative effect on occupancy but this effect was only significant in Phoridae. Anthropogenic drivers had mixed though mostly insignificant effects, as some groups and species were most diverse in highly urbanized areas, while other groups showed suppressed diversity. Only Phoridae was significantly affected by land value, where most species were more likely to occur in areas with lower land value. Los Angeles can support high regional arthropod diversity, but spatial community composition is highly dependent on the taxonomic group.
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Affiliation(s)
- Jayme M M Lewthwaite
- Marine and Environmental Section, Department of Biological Sciences, University of Southern California, Los Angeles, 90089, USA
| | - Teagan M Baiotto
- Marine and Environmental Section, Department of Biological Sciences, University of Southern California, Los Angeles, 90089, USA
| | - Brian V Brown
- Department of Entomology, Natural History Museum of Los Angeles County, Los Angeles, 90007, USA
| | - Yan Yin Cheung
- Marine and Environmental Section, Department of Biological Sciences, University of Southern California, Los Angeles, 90089, USA
| | - Austin J Baker
- Marine and Environmental Section, Department of Biological Sciences, University of Southern California, Los Angeles, 90089, USA
- Department of Entomology, Natural History Museum of Los Angeles County, Los Angeles, 90007, USA
| | - Charles Lehnen
- Marine and Environmental Section, Department of Biological Sciences, University of Southern California, Los Angeles, 90089, USA
- Human Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, 90089, USA
| | - Terrence P McGlynn
- Department of Entomology, Natural History Museum of Los Angeles County, Los Angeles, 90007, USA
- Department of Biology, California State University Dominguez Hills, Carson, 90747, USA
| | - Vaughn Shirey
- Marine and Environmental Section, Department of Biological Sciences, University of Southern California, Los Angeles, 90089, USA
- Department of Biology, Georgetown University, Washington, DC, 20057, USA
| | - Lisa Gonzalez
- Natural History Museum of Los Angeles County, Los Angeles, 90007, USA
| | - Emily Hartop
- Center for Integrative Biodiversity Discovery, Museum für Naturkunde, Berlin, Germany
| | - Peter H Kerr
- California State Collection of Arthropods, CDFA Plant Pest Diagnostics Center, Sacramento, CA, 95832, USA
| | - Eric Wood
- Department of Biological Sciences, California State University Los Angeles, 5151 State University Drive, Los Angeles, 90032, USA
| | - Laura Melissa Guzman
- Marine and Environmental Section, Department of Biological Sciences, University of Southern California, Los Angeles, 90089, USA.
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9
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McCleery R, Guralnick R, Beatty M, Belitz M, Campbell CJ, Idec J, Jones M, Kang Y, Potash A, Fletcher RJ. Uniting Experiments and Big Data to advance ecology and conservation. Trends Ecol Evol 2023; 38:970-979. [PMID: 37330409 DOI: 10.1016/j.tree.2023.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 05/15/2023] [Accepted: 05/16/2023] [Indexed: 06/19/2023]
Abstract
Many ecologists increasingly advocate for research frameworks centered on the use of 'big data' to address anthropogenic impacts on ecosystems. Yet, experiments are often considered essential for identifying mechanisms and informing conservation interventions. We highlight the complementarity of these research frameworks and expose largely untapped opportunities for combining them to speed advancements in ecology and conservation. With nascent but increasing application of model integration, we argue that there is an urgent need to unite experimental and big data frameworks throughout the scientific process. Such an integrated framework offers potential for capitalizing on the benefits of both frameworks to gain rapid and reliable answers to ecological challenges.
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Affiliation(s)
- Robert McCleery
- Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL 32618, USA.
| | - Robert Guralnick
- Florida Museum of Natural History, University of Florida, Gainesville, FL 32618, USA
| | - Meghan Beatty
- Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL 32618, USA
| | - Michael Belitz
- Florida Museum of Natural History, University of Florida, Gainesville, FL 32618, USA
| | - Caitlin J Campbell
- Department of Biology, University of Florida, Gainesville, FL 32618, USA
| | - Jacob Idec
- Florida Museum of Natural History, University of Florida, Gainesville, FL 32618, USA
| | - Maggie Jones
- School of Natural Resources and the Environment, University of Florida, Gainesville, FL 32618, USA
| | - Yiyang Kang
- Department of Environmental Engineering Sciences, University of Florida, Gainesville, FL 32618, USA
| | - Alex Potash
- Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL 32618, USA
| | - Robert J Fletcher
- Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL 32618, USA
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10
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Bromham L, Yaxley KJ. Neighbours and relatives: accounting for spatial distribution when testing causal hypotheses in cultural evolution. EVOLUTIONARY HUMAN SCIENCES 2023; 5:e27. [PMID: 37829289 PMCID: PMC10565196 DOI: 10.1017/ehs.2023.23] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 08/14/2023] [Accepted: 08/17/2023] [Indexed: 10/14/2023] Open
Abstract
Many important and interesting hypotheses about cultural evolution are evaluated using cross-cultural correlations: if knowing one particular feature of a culture (e.g. environmental conditions such as temperature, humidity or parasite load) allows you to predict other features (e.g. language features, religious beliefs, cuisine), it is often interpreted as indicating a causal link between the two (e.g. hotter climates carry greater disease risk, which encourages belief in supernatural forces and favours the use of antimicrobial ingredients in food preparation; dry climates make the production of distinct tones more difficult). However, testing such hypotheses from cross-cultural comparisons requires us to take proximity of cultures into account: nearby cultures share many aspects of their environment and are more likely to be similar in many culturally inherited traits. This can generate indirect associations between environment and culture which could be misinterpreted as signals of a direct causal link. Evaluating examples of cross-cultural correlations from the literature, we show that significant correlations interpreted as causal relationships can often be explained as a result of similarity between neighbouring cultures. We discuss some strategies for sorting the explanatory wheat from the co-varying chaff, distinguishing incidental correlations from causal relationships.
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Affiliation(s)
- Lindell Bromham
- Macroevolution and Macroecology, Research School of Biology, Australian National University, Canberra, ACT 2601, Australia
| | - Keaghan J. Yaxley
- Macroevolution and Macroecology, Research School of Biology, Australian National University, Canberra, ACT 2601, Australia
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11
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Francis EC, Kechris K, Jansson T, Dabelea D, Perng W. Novel Metabolic Subtypes in Pregnant Women and Risk of Early Childhood Obesity in Offspring. JAMA Netw Open 2023; 6:e237030. [PMID: 37014638 PMCID: PMC10074224 DOI: 10.1001/jamanetworkopen.2023.7030] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 02/21/2023] [Indexed: 04/05/2023] Open
Abstract
Importance The in utero metabolic milieu is associated with offspring adiposity. Standard definitions of maternal obesity (according to prepregnancy body mass index [BMI]) and gestational diabetes (GDM) may not be adequate to capture subtle yet important differences in the intrauterine environment that could be involved in programming. Objectives To identify maternal metabolic subgroups during pregnancy and to examine associations of subgroup classification with adiposity traits in their children. Design, Setting, and Participants This cohort study included mother-offspring pairs in the Healthy Start prebirth cohort (enrollment: 2010-2014) recruited from University of Colorado Hospital obstetrics clinics in Aurora, Colorado. Follow-up of women and children is ongoing. Data were analyzed from March to December 2022. Exposures Metabolic subtypes of pregnant women ascertained by applying k-means clustering on 7 biomarkers and 2 biomarker indices measured at approximately 17 gestational weeks: glucose, insulin, Homeostatic Model Assessment for Insulin Resistance, total cholesterol, high-density lipoprotein cholesterol (HDL-C), triglycerides, free fatty acids (FFA), HDL-C:triglycerides ratio, and tumor necrosis factor α. Main Outcomes and Measures Offspring birthweight z score and neonatal fat mass percentage (FM%). In childhood at approximately 5 years of age, offspring BMI percentile, FM%, BMI in the 95th percentile or higher, and FM% in the 95th percentile or higher. Results A total of 1325 pregnant women (mean [SD] age, 27.8 [6.2 years]; 322 [24.3%] Hispanic, 207 non-Hispanic Black [15.6%], and 713 [53.8%] non-Hispanic White), and 727 offspring with anthropometric data measured in childhood (mean [SD] age 4.81 [0.72] years, 48% female) were included. We identified the following 5 maternal metabolic subgroups: reference (438 participants), high HDL-C (355 participants), dyslipidemic-high triglycerides (182 participants), dyslipidemic-high FFA (234 participants), and insulin resistant (IR)-hyperglycemic (116 participants). Compared with the reference subgroup, women in the IR-hyperglycemic and dyslipidemic-high FFA subgroups had offspring with 4.27% (95% CI, 1.94-6.59) and 1.96% (95% CI, 0.45-3.47) greater FM% during childhood, respectively. There was a higher risk of high FM% among offspring of the IR-hyperglycemic (relative risk, 8.7; 95% CI, 2.7-27.8) and dyslipidemic-high FFA (relative risk, 3.4; 95% CI, 1.0-11.3) subgroups; this risk was of greater magnitude compared with prepregnancy obesity alone, GDM alone, or both conditions. Conclusions and Relevance In this cohort study, an unsupervised clustering approach revealed distinct metabolic subgroups of pregnant women. These subgroups exhibited differences in risk of offspring adiposity in early childhood. Such approaches have the potential to refine understanding of the in utero metabolic milieu, with utility for capturing variation in sociocultural, anthropometric, and biochemical risk factors for offspring adiposity.
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Affiliation(s)
- Ellen C. Francis
- The Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, Aurora, Colorado
| | - Katerina Kechris
- The Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, Aurora, Colorado
- Department of Biostatistics and Informatics, Colorado School of Public Health, Aurora
| | - Thomas Jansson
- Department of Obstetrics and Gynecology, University of Colorado Anschutz Medical Campus, Aurora
| | - Dana Dabelea
- The Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, Aurora, Colorado
- Department of Epidemiology, Colorado School of Public Health, University of Colorado Denver Anschutz Medical Campus, Aurora
| | - Wei Perng
- The Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, Aurora, Colorado
- Department of Epidemiology, Colorado School of Public Health, University of Colorado Denver Anschutz Medical Campus, Aurora
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12
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Arif S, Massey MDB. Reducing bias in experimental ecology through directed acyclic graphs. Ecol Evol 2023; 13:e9947. [PMID: 37006894 PMCID: PMC10050842 DOI: 10.1002/ece3.9947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/10/2023] [Accepted: 03/12/2023] [Indexed: 03/31/2023] Open
Abstract
Ecologists often rely on randomized control trials (RCTs) to quantify causal relationships in nature. Many of our foundational insights of ecological phenomena can be traced back to well‐designed experiments, and RCTs continue to provide valuable insights today. Although RCTs are often regarded as the “gold standard” for causal inference, it is important to recognize that they too rely on a set of causal assumptions that must be justified and met by the researcher to draw valid causal conclusions. We use key ecological examples to show how biases such as confounding, overcontrol, and collider bias can occur in experimental setups. In tandem, we highlight how such biases can be removed through the application of the structural causal model (SCM) framework. The SCM framework visualizes the causal structure of a system or process under study using directed acyclic graphs (DAGs) and subsequently applies a set of graphical rules to remove bias from both observational and experimental data. We show how DAGs can be applied across ecological experimental studies to ensure proper study design and statistical analysis, leading to more accurate causal estimates drawn from experimental data. Although causal conclusions drawn from RCTs are often taken at face value, ecologists are increasingly becoming aware that experimental approaches must be carefully designed and analyzed to avoid potential biases. By applying DAGs as a visual and conceptual tool, experimental ecologists can increasingly meet the causal assumptions required for valid causal inference.
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Affiliation(s)
- Suchinta Arif
- Department of BiologyDalhousie University1355 Oxford StreetHalifaxNova ScotiaB3H 4R2Canada
| | - Melanie Duc Bo Massey
- Department of BiologyDalhousie University1355 Oxford StreetHalifaxNova ScotiaB3H 4R2Canada
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13
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Thorson JT, Maureaud AA, Frelat R, Mérigot B, Bigman JS, Friedman ST, Palomares MLD, Pinsky ML, Price SA, Wainwright P. Identifying direct and indirect associations among traits by merging phylogenetic comparative methods and structural equation models. Methods Ecol Evol 2023. [DOI: 10.1111/2041-210x.14076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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14
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Perng W, Nakiwala D, Goodrich JM. What Happens In Utero Does Not Stay In Utero: a Review of Evidence for Prenatal Epigenetic Programming by Per- and Polyfluoroalkyl Substances (PFAS) in Infants, Children, and Adolescents. Curr Environ Health Rep 2023; 10:35-44. [PMID: 36414885 DOI: 10.1007/s40572-022-00387-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/22/2022] [Indexed: 11/24/2022]
Abstract
PURPOSE OF REVIEW Review human literature on the relationship between prenatal exposure to per- and polyfluoroalkyl substances (PFAS) and epigenetic modifications in infants, children, and adolescents < 18 years of age. RECENT FINDINGS Eleven studies were identified, with study populations located in the U.S., Taiwan, Japan, and the Kingdom of Denmark. Many studies (n = 5) were cross-sectional, with PFAS exposure and epigenetic outcomes measured in the same tissue collected at delivery via cord blood or dried newborn blood spots. The other six studies were prospective, with prenatal PFAS measured on maternal blood during pregnancy and DNA methylation (DNAm) assessed in cord blood and childhood peripheral leukocytes (n = 1 study). Epigenetic marks of interest included global DNAm measures (LINE-1, Alu, and an ELISA-based method), candidate genes (IFG2, H19, and MEST), and epigenome-wide DNA methylation via array-based methods (Infinium 450 K and EPIC). Two studies using array-based methods employed discovery and validation paradigms, in which a small subset of loci (n = 6 and n = 4) were replicated in the discovery population. One site (TNXB) was a hit in two independent studies. Collectively, loci associated with PFAS were in regions involved in growth and development, lipid metabolism, and nutrient metabolism. There is moderate human evidence supporting associations of prenatal PFAS exposure on DNAm at birth, with one study suggesting sustained effects into childhood. Future studies are warranted to link PFAS-associated DNAm to health outcomes, as well as to investigate the role of other epigenetic marks such as hydroxymethylation, miRNA expression, and histone modifications.
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Affiliation(s)
- Wei Perng
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.
- Department of Epidemiology, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.
- Department of Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA.
| | - Dorothy Nakiwala
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Jaclyn M Goodrich
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA
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15
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Stewart PS, Stephens PA, Hill RA, Whittingham MJ, Dawson W. Model selection in occupancy models: Inference versus prediction. Ecology 2023; 104:e3942. [PMID: 36477749 DOI: 10.1002/ecy.3942] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/31/2022] [Accepted: 11/07/2022] [Indexed: 12/12/2022]
Abstract
Occupancy models are a vital tool for ecologists studying the patterns and drivers of species occurrence, but their use often involves selecting among models with different sets of occupancy and detection covariates. The information-theoretic approach, which employs information criteria such as Akaike's information criterion (AIC) is arguably the most popular approach for model selection in ecology and is often used for selecting occupancy models. However, the information-theoretic approach risks selecting models that produce inaccurate parameter estimates due to a phenomenon called collider bias, a type of confounding that can arise when adding explanatory variables to a model. Using simulations, we investigated the consequences of collider bias (using an illustrative example called M-bias) in the occupancy and detection processes of an occupancy model, and explored the implications for model selection using AIC and a common alternative, the Schwarz criterion (or Bayesian information criterion, BIC). We found that when M-bias was present in the occupancy process, AIC and BIC selected models that inaccurately estimated the effect of the focal occupancy covariate, while simultaneously producing more accurate predictions of the site-level occupancy probability than other models in the candidate set. In contrast, M-bias in the detection process did not impact the focal estimate; all models made accurate inferences, while the site-level predictions of the AIC/BIC-best model were slightly more accurate. Our results show that information criteria can be used to select occupancy covariates if the sole purpose of the model is prediction, but must be treated with more caution if the purpose is to understand how environmental variables affect occupancy. By contrast, detection covariates can usually be selected using information criteria regardless of the model's purpose. These findings illustrate the importance of distinguishing between the tasks of parameter inference and prediction in ecological modeling. Furthermore, our results underline concerns about the use of information criteria to compare different biological hypotheses in observational studies.
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Affiliation(s)
| | | | - Russell A Hill
- Department of Anthropology, Durham University, Durham, UK
| | - Mark J Whittingham
- School of Natural and Environmental Sciences, Newcastle University, Newcastle-Upon-Tyne, UK
| | - Wayne Dawson
- Department of Biosciences, Durham University, Durham, UK
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16
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Desai NP, Fedurek P, Slocombe KE, Wilson ML. Chimpanzee pant-hoots encode individual information more reliably than group differences. Am J Primatol 2022; 84:e23430. [PMID: 36093564 PMCID: PMC9786991 DOI: 10.1002/ajp.23430] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 08/03/2022] [Accepted: 08/08/2022] [Indexed: 12/30/2022]
Abstract
Vocal learning, the ability to modify the acoustic structure of vocalizations based on social experience, is a fundamental feature of speech in humans (Homo sapiens). While vocal learning is common in taxa such as songbirds and whales, the vocal learning capacities of nonhuman primates appear more limited. Intriguingly, evidence for vocal learning has been reported in chimpanzees (Pan troglodytes), for example, in the form of regional variation ("dialects") in the "pant-hoot" calls. This suggests that some capacity for vocal learning may be an ancient feature of the Pan-Homo clade. Nonetheless, reported differences have been subtle, with intercommunity variation representing only a small portion of the total acoustic variation. To gain further insights into the extent of regional variation in chimpanzee vocalizations, we performed an analysis of pant-hoots from chimpanzees in the neighboring Kasekela and Mitumba communities at Gombe National Park, Tanzania, and the geographically distant Kanyawara community at Kibale National Park, Uganda. We did not find any statistically significant differences between the neighboring communities at Gombe or among geographically distant communities. Furthermore, we found differences among individuals in all communities. Hence, the variation in chimpanzee pant-hoots reflected individual differences, rather than group differences. Thus, we did not find evidence of dialects in this population, suggesting that extensive vocal learning emerged only after the lineages of Homo and Pan diverged.
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Affiliation(s)
- Nisarg P. Desai
- Department of AnthropologyUniversity of MinnesotaMinneapolisMinnesotaUSA
| | - Pawel Fedurek
- Division of Psychology, Faculty of Natural SciencesUniversity of StirlingStirlingUK
| | | | - Michael L. Wilson
- Department of AnthropologyUniversity of MinnesotaMinneapolisMinnesotaUSA,Department of Ecology, Evolution, and BehaviorUniversity of MinnesotaSt. PaulMinnesotaUSA,Institute on the EnvironmentUniversity of MinnesotaSt. PaulMinnesotaUSA
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17
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Gauss T, Richards JE, Tortù C, Ageron FX, Hamada S, Josse J, Husson F, Harrois A, Scalea TM, Vivant V, Meaudre E, Morrison JJ, Galvagno S, Bouzat P. Association of Early Norepinephrine Administration With 24-Hour Mortality Among Patients With Blunt Trauma and Hemorrhagic Shock. JAMA Netw Open 2022; 5:e2234258. [PMID: 36205999 PMCID: PMC9547317 DOI: 10.1001/jamanetworkopen.2022.34258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
IMPORTANCE Hemorrhagic shock is a common cause of preventable death after injury. Vasopressor administration for patients with blunt trauma and hemorrhagic shock is often discouraged. OBJECTIVE To evaluate the association of early norepinephrine administration with 24-hour mortality among patients with blunt trauma and hemorrhagic shock. DESIGN, SETTING, AND PARTICIPANTS This retrospective, multicenter, observational cohort study used data from 3 registries in the US and France on all consecutive patients with blunt trauma from January 1, 2013, to December 31, 2018. Patients were alive on admission with hemorrhagic shock, defined by prehospital or admission systolic blood pressure less than 100 mm Hg and evidence of hemorrhage (ie, prehospital or resuscitation room transfusion of packed red blood cells, receipt of emergency treatment for hemorrhage control, transfusion of >10 units of packed red blood cells in the first 24 hours, or death from hemorrhage). Blunt trauma was defined as any exposure to nonpenetrating kinetic energy, collision, or deceleration. Statistical analysis was performed from January 15, 2021, to February 22, 2022. EXPOSURE Continuous administration of norepinephrine in the prehospital environment or resuscitation room prior to hemorrhage control, according to European guidelines. MAIN OUTCOMES AND MEASURES The primary outcome was 24-hour mortality, and the secondary outcome was in-hospital mortality. The average treatment effect (ATE) of early norepinephrine administration on 24-hour mortality was estimated according to the Rubin causal model. Inverse propensity score weighting and the doubly robust approach with 5 distinct analytical strategies were used to determine the ATE. RESULTS A total of 52 568 patients were screened for inclusion, and 2164 patients (1508 men [70%]; mean [SD] age, 46 [19] years; median Injury Severity Score, 29 [IQR, 17-36]) presented with acute hemorrhage and were included. A total of 1497 patients (69.1%) required emergency hemorrhage control, 128 (5.9%) received a prehospital transfusion of packed red blood cells, and 543 (25.0%) received a massive transfusion. Norepinephrine was administered to 1498 patients (69.2%). The 24-hour mortality rate was 17.8% (385 of 2164), and the in-hospital mortality rate was 35.6% (770 of 2164). None of the 5 analytical strategies suggested any statistically significant association between norepinephrine administration and 24-hour mortality, with ATEs ranging from -4.6 (95% CI, -11.9 to 2.7) to 2.1 (95% CI, -2.1 to 6.3), or between norepinephrine administration and in-hospital mortality, with ATEs ranging from -1.3 (95% CI, -9.5 to 6.9) to 5.3 (95% CI, -2.1 to 12.8). CONCLUSIONS AND RELEVANCE The findings of this study suggest that early norepinephrine infusion was not associated with 24-hour or in-hospital mortality among patients with blunt trauma and hemorrhagic shock. Randomized clinical trials that study the effect of early norepinephrine administration among patients with trauma and hypotension are warranted to further assess whether norepinephrine is safe for patients with hemorrhagic shock.
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Affiliation(s)
- Tobias Gauss
- Anesthesia and Critical Care, Grenoble Alpes University Hospital, Grenoble, France
| | - Justin E. Richards
- Program in Trauma, R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore
| | | | - François-Xavier Ageron
- Emergency Department, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Sophie Hamada
- Department of Anesthesia and Critical Care, Hôpital Européen Georges Pompidou, AP-HP, Université de Paris, Paris, France
- Centre de Recherche en épidémiologie et Santé des populations, INSERM U 10-18, Université Paris-Saclay, Paris, France
| | - Julie Josse
- National Institute for Research in Digital Science and Technology (INRIA), Montpellier, France
| | - François Husson
- Institut Agro, Université Rennes, French National Centre for Scientific Research, Institut de recherche mathématique de Rennes, Rennes, France
| | - Anatole Harrois
- Department of Anesthesiology and Critical Care, Bicêtre Hospital, AP-HP, University Paris Saclay, Le Kremlin Bicêtre, France
| | - Thomas M. Scalea
- Program in Trauma, R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore
| | | | - Eric Meaudre
- Department of Intensive Care Unit and Anesthesia, Military Teaching Hospital Sainte-Anne, Toulon, France
| | - Jonathan J. Morrison
- Program in Trauma, R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore
| | - Samue Galvagno
- Program in Trauma, R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore
| | - Pierre Bouzat
- Anesthesia and Critical Care, Grenoble Alpes University Hospital, Grenoble, France
- University Grenoble Alpes, INSERM, U1216, CHU Grenoble Alpes, Grenoble Institute Neurosciences, Grenoble, France
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18
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Smeele SQ. Using relative brain size as predictor variable: Serious pitfalls and solutions. Ecol Evol 2022; 12:e9273. [PMID: 36188504 PMCID: PMC9489487 DOI: 10.1002/ece3.9273] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 08/10/2022] [Accepted: 08/22/2022] [Indexed: 11/05/2022] Open
Abstract
There is a long‐standing interest in the effect of relative brain size on other life history variables in a comparative context. Historically, residuals have been used to calculate these effects, but more recently it has been recognized that regression on residuals is not good practice. Instead, absolute brain size and body size are included in a multiple regression, with the idea that this controls for allometry. I use a simple simulation to illustrate how a case in which brain size is a response variable differs from a case in which relative brain size is a predictor variable. I use the simulated data to test which modeling approach can estimate the underlying causal effects for each case. The results show that a multiple regression model with both body size and another variable as predictor variable and brain size as response variable work well. However, if relative brain size is a predictor variable, a multiple regression fails to correctly estimate the effect of body size. I propose the use of structural equation models to simultaneously estimate relative brain size and its effect on the third variable and discuss other potential methods.
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Affiliation(s)
- Simeon Q. Smeele
- Cognitive & Cultural Ecology Research Group Max Planck Institute of Animal Behavior Radolfzell Germany
- Department of Human Behavior, Ecology and Culture Max Planck Institute for Evolutionary Anthropology Leipzig Germany
- Department of Biology University of Konstanz Constance Germany
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19
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Humphreys JM, Srygley RB, Lawton D, Hudson AR, Branson DH. Grasshoppers exhibit asynchrony and spatial non-stationarity in response to the El Niño/Southern and Pacific Decadal Oscillations. Ecol Modell 2022. [DOI: 10.1016/j.ecolmodel.2022.110043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Chye A, Hackett ML, Hankey GJ, Lundström E, Almeida OP, Gommans J, Dennis M, Jan S, Mead GE, Ford AH, Beer CE, Flicker L, Delcourt C, Billot L, Anderson CS, Stibrant Sunnerhagen K, Yi Q, Bompoint S, Nguyen TH, Lung T. Repeated Measures of Modified Rankin Scale Scores to Assess Functional Recovery From Stroke: AFFINITY Study Findings. J Am Heart Assoc 2022; 11:e025425. [PMID: 35929466 PMCID: PMC9496315 DOI: 10.1161/jaha.121.025425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Function after acute stroke using the modified Rankin Scale (mRS) is usually assessed at a point in time. The analytical implications of serial mRS measurements to evaluate functional recovery over time is not completely understood. We compare repeated‐measures and single‐measure analyses of the mRS from a randomized clinical trial. Methods and Results Serial mRS data from AFFINITY (Assessment of Fluoxetine in Stroke Recovery), a double‐blind placebo randomized clinical trial of fluoxetine following stroke (n=1280) were analyzed to identify demographic and clinical associations with functional recovery (reduction in mRS) over 12 months. Associations were identified using single‐measure (day 365) and repeated‐measures (days 28, 90, 180, and 365) partial proportional odds logistic regression. Ninety‐five percent of participants experienced a reduction in mRS after 12 months. Functional recovery was associated with age at stroke <70 years; no prestroke history of diabetes, coronary heart disease, or ischemic stroke; prestroke history of depression, a relationship partner, living with others, independence, or paid employment; no fluoxetine intervention; ischemic stroke (compared with hemorrhagic); stroke treatment in Vietnam (compared with Australia or New Zealand); longer time since current stroke; and lower baseline National Institutes of Health Stroke Scale & Patient Health Questionnaire‐9 scores. Direction of associations was largely concordant between single‐measure and repeated‐measures models. Association strength and variance was generally smaller in the repeated‐measures model compared with the single‐measure model. Conclusions Repeated‐measures may improve trial precision in identifying trial associations and effects. Further repeated‐measures stroke analyses are required to prove methodological value. Registration URL: http://www.anzctr.org.au; Unique identifier: ACTRN12611000774921.
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Affiliation(s)
- Alexander Chye
- The George Institute for Global Health University of New South Wales Sydney New South Wales Australia
| | - Maree L Hackett
- The George Institute for Global Health University of New South Wales Sydney New South Wales Australia.,The University of Central Lancashire Preston Lancashire United Kingdom
| | - Graeme J Hankey
- Medical School Faculty of Health and Medical Sciences, The University of Western Australia Perth Western Australia Australia.,Department of Neurology Sir Charles Gairdner Hospital Perth Western Australia Australia
| | - Erik Lundström
- Department of Neuroscience Neurology, Uppsala University Uppsala Sweden
| | - Osvaldo P Almeida
- Medical School University of Western Australia Perth Western Australia Australia
| | - John Gommans
- Hawke's Bay Hospital, Hastings Hawke's Bay New Zealand
| | - Martin Dennis
- Centre for Clinical Brain Sciences University of Edinburgh Edinburgh Scotland United Kingdom
| | - Stephen Jan
- The George Institute for Global Health University of New South Wales Sydney New South Wales Australia
| | - Gillian E Mead
- Usher Institute University of Edinburgh Edinburgh Scotland United Kingdom
| | - Andrew H Ford
- Medical School University of Western Australia Perth Western Australia Australia
| | | | - Leon Flicker
- Medical School University of Western Australia Perth Western Australia Australia
| | - Candice Delcourt
- The George Institute for Global Health University of New South Wales Sydney New South Wales Australia.,Faculty of Medicine University of New South Wales Sydney New South Wales Australia.,Department of Clinical Medicine, Faculty of Medicine Health and Human Sciences, Macquarie University Macquarie Park New South Wales Australia
| | - Laurent Billot
- The George Institute for Global Health University of New South Wales Sydney New South Wales Australia
| | - Craig S Anderson
- The George Institute for Global Health University of New South Wales Sydney New South Wales Australia.,Faculty of Medicine University of New South Wales Sydney New South Wales Australia.,Neurology Department Royal Prince Alfred Hospital Sydney New South Wales Australia.,The George Institute for Global Health at Peking University Health Science Center Beijing People's Republic of China
| | - Katharina Stibrant Sunnerhagen
- Institute of Neuroscience and Physiology-Clinical Neuroscience The Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
| | - Qilong Yi
- Canadian Blood Services and University of Toronto Toronto Canada
| | - Severine Bompoint
- The George Institute for Global Health University of New South Wales Sydney New South Wales Australia
| | - Thang Huy Nguyen
- Cerebrovascular Disease Department The People's Hospital 115 Ho Chi Min City Vietnam
| | - Thomas Lung
- The George Institute for Global Health University of New South Wales Sydney New South Wales Australia.,Faculty of Medicine and Health The University of Sydney Sydney Australia
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21
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Dhaliwal SK, Dabelea D, Lee-Winn AE, Glueck DH, Wilkening G, Perng W. Characterization of Maternal Psychosocial Stress During Pregnancy: The Healthy Start Study. WOMEN'S HEALTH REPORTS 2022; 3:698-708. [PMID: 36147836 PMCID: PMC9436384 DOI: 10.1089/whr.2022.0011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Accepted: 05/19/2022] [Indexed: 11/12/2022]
Abstract
Objective: To capture multidimensional maternal psychosocial stress using responses from the Edinburgh Postnatal Depression Scale (EPDS) and Cohen's Perceived Stress Scale (PSS) administered during pregnancy, and to identify sociodemographic, biological, and health behavioral correlates of the stress domains. Methods: Using data from 1,079 pregnant women, we implemented principal component analysis on EPDS and PSS responses and retained factors based on the Scree plot and Eigenvalues >1. We then used linear regression to identify perinatal correlates of each domain. Results: We identified three stress domains: “Feeling Overwhelmed,” “Anhedonia,” and “Lack of Control,” which accounted for 10.6% of variance in questionnaire responses. In multivariable analyses, household income ≤$70,000 (β = 0.21 confidence interval [95% CI: 0.05–0.39]), primiparity (0.36 [0.02–0.71]), inadequate (0.21 [0.04–0.39]) or excessive gestational weight gain (0.27 [0.11–0.42]), and Healthy Eating Index (HEI) score ≤57 (0.14 [0.00–0.28]) were associated with Feeling Overwhelmed. Older age (0.02 [0.00–0.03] per 1-year), Hispanic ethnicity (0.19 [0.00–0.38]), and HEI score ≤57 (0.15 [0.02–0.28]) were associated with Anhedonia. Non-Hispanic Black race/ethnicity (0.37 [0.10–0.63]), not having graduated from college (0.16 [−0.02 to 0.35]), having a partner born outside the United States (0.17 [−0.02 to 0.37]), household size of ≥5 persons (0.21 [−0.02 to 0.37]), receiving public assistance (0.18 [−0.02 to 0.37]), and prenatal smoking (0.32 [0.05–0.59]) were associated with Lack of Control. Conclusions: Three domains of maternal psychosocial stress during pregnancy (Feeling Overwhelmed, Anhedonia, and Lack of Control) were differentially related to sociodemographic, biological, and health behavioral characteristics that may be targets for interventions to ameliorate stress in pregnant women. Clinical Trial Registry : The Healthy Start study is registered as an observational study at clinicaltrials.gov (NCT #002273297).
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Affiliation(s)
- Satvinder K. Dhaliwal
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado, USA
- Department of Epidemiology, Colorado School of Public Health, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado, USA
| | - Dana Dabelea
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado, USA
- Department of Epidemiology, Colorado School of Public Health, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado, USA
- Department of Pediatrics, School of Medicine, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado, USA
| | - Angela E. Lee-Winn
- Department of Epidemiology, Colorado School of Public Health, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado, USA
| | - Deborah H. Glueck
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado, USA
- Department of Epidemiology, Colorado School of Public Health, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado, USA
- Department of Pediatrics, School of Medicine, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado, USA
| | - Greta Wilkening
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado, USA
- Department or Neuropsychology, Colorado Children's Hospital, Aurora, Colorado, USA
| | - Wei Perng
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado, USA
- Department of Epidemiology, Colorado School of Public Health, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado, USA
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22
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Jolles JW, Sosna MMG, Mazué GPF, Twomey CR, Bak-Coleman J, Rubenstein DI, Couzin ID. Both prey and predator features predict the individual predation risk and survival of schooling prey. eLife 2022; 11:76344. [PMID: 35852826 PMCID: PMC9348852 DOI: 10.7554/elife.76344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 07/18/2022] [Indexed: 11/15/2022] Open
Abstract
Predation is one of the main evolutionary drivers of social grouping. While it is well appreciated that predation risk is likely not shared equally among individuals within groups, its detailed quantification has remained difficult due to the speed of attacks and the highly dynamic nature of collective prey response. Here, using high-resolution tracking of solitary predators (Northern pike) hunting schooling fish (golden shiners), we not only provide insights into predator decision-making, but show which key spatial and kinematic features of predator and prey predict the risk of individuals to be targeted and to survive attacks. We found that pike tended to stealthily approach the largest groups, and were often already inside the school when launching their attack, making prey in this frontal ‘strike zone’ the most vulnerable to be targeted. From the prey’s perspective, those fish in central locations, but relatively far from, and less aligned with, neighbours, were most likely to be targeted. While the majority of attacks were successful (70%), targeted individuals that did manage to avoid being captured exhibited a higher maximum acceleration response just before the attack and were further away from the pike‘s head. Our results highlight the crucial interplay between predators’ attack strategy and response of prey underlying the predation risk within mobile animal groups.
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Affiliation(s)
| | - Matthew MG Sosna
- Department of Ecology and Evolutionary Biology, Princeton University
| | | | | | | | | | - Iain D Couzin
- Department of Collective Behaviour, Max Planck Institute of Animal Behavior
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23
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Grames EM, Schwartz D, Elphick CS. A systematic method for hypothesis synthesis and conceptual model development. Methods Ecol Evol 2022. [DOI: 10.1111/2041-210x.13940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Eliza M. Grames
- Department of Ecology and Evolutionary Biology University of Connecticut (USA) 75 North Eagleville Rd, 06269 Storrs CT USA
- Current address: Department of Biology University of Nevada Reno (USA) 1664 N Virginia St, Reno, 89557 NV USA
| | - Danielle Schwartz
- Department of Ecology and Evolutionary Biology University of Connecticut (USA) 75 North Eagleville Rd, 06269 Storrs CT USA
| | - Chris S. Elphick
- Department of Ecology and Evolutionary Biology University of Connecticut (USA) 75 North Eagleville Rd, 06269 Storrs CT USA
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24
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Laubach ZM, Holekamp KE, Aris IM, Slopen N, Perng W. Applications of conceptual models from lifecourse epidemiology in ecology and evolutionary biology. Biol Lett 2022; 18:20220194. [PMID: 35855609 PMCID: PMC9297019 DOI: 10.1098/rsbl.2022.0194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 06/10/2022] [Indexed: 11/30/2022] Open
Abstract
In ecology and evolutionary biology (EEB), the study of developmental plasticity seeks to understand ontogenetic processes underlying the phenotypes upon which natural selection acts. A central challenge to this inquiry is ascertaining a causal effect of the exposure on the manifestation of later-life phenotype due to the time elapsed between the two events. The exposure is a potential cause of the outcome-i.e. an environmental stimulus or experience. The later phenotype might be a behaviour, physiological condition, morphology or life-history trait. The latency period between the exposure and outcome complicates causal inference due to the inevitable occurrence of additional events that may affect the relationship of interest. Here, we describe six distinct but non-mutually exclusive conceptual models from the field of lifecourse epidemiology and discuss their applications to EEB research. The models include Critical Period with No Later Modifiers, Critical Period with Later Modifiers, Accumulation of Risk with Independent Risk Exposures, Accumulation of Risk with Risk Clustering, Accumulation of Risk with Chains of Risk and Accumulation of Risk with Trigger Effect. These models, which have been widely used to test causal hypotheses regarding the early origins of adult-onset disease in humans, are directly relevant to research on developmental plasticity in EEB.
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Affiliation(s)
- Zachary M. Laubach
- Department of Ecology and Evolutionary Biology (EEB), University of Colorado Boulder, Boulder, CO, USA
- Mara Hyena Project, Karen, Nairobi, Kenya
| | - Kay E. Holekamp
- Mara Hyena Project, Karen, Nairobi, Kenya
- Department of Integrative Biology, Michigan State University, East Lansing, MI, USA
| | - Izzuddin M. Aris
- Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA
| | - Natalie Slopen
- Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Wei Perng
- Department of Epidemiology, Colorado School of Public Health, University of Colorado, Aurora, CO, USA
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado, Aurora, CO, USA
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25
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Arif S, MacNeil A. Predictive models aren't for causal inference. Ecol Lett 2022; 25:1741-1745. [DOI: 10.1111/ele.14033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/21/2022] [Accepted: 05/08/2022] [Indexed: 12/14/2022]
Affiliation(s)
- Suchinta Arif
- Ocean Frontier Institute Dalhousie University, Department of Biology Halifax Nova Scotia Canada
| | - Aaron MacNeil
- Ocean Frontier Institute Dalhousie University, Department of Biology Halifax Nova Scotia Canada
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26
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Laubach ZM, Gering E, Yang E, Montgomery TM, Getty T, Holekamp KE. Associations between Toxoplasma gondii infection and steroid hormone levels in spotted hyenas. Int J Parasitol Parasites Wildl 2022; 17:53-59. [PMID: 34984167 PMCID: PMC8693151 DOI: 10.1016/j.ijppaw.2021.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/24/2021] [Accepted: 11/24/2021] [Indexed: 11/30/2022]
Abstract
Toxoplasma gondii is a common parasite that infects warm-blooded animals and influences host physiology. T. gondii is known to target the host's central nervous system, affecting circulating levels of steroid hormones, fear-related behaviors, and health, although these effects appear to vary among host taxa. Here, we investigated the relationship between T. gondii infection and levels of plasma testosterone and cortisol within a wild population of spotted hyenas (Crocutacrocuta, n = 109). In our analyses, we accounted for age and sex via stratified regression analyses. We detected a negative association between circulating plasma testosterone and T. gondii infection among female cubs and subadults as well as adult male hyenas. We found no associations between T. gondii infection and cortisol in any age class or sex group of hyenas. Our work adds to a growing body of literature by characterizing the relationship between T. gondii infection and physiology in a novel host in its natural habitat. In a broader context, our findings indicate that responses to infection vary with characteristics of the host and point to a clear need for additional studies and priorities for future work that include diverse taxa and ecological settings. Toxoplasma gondii infects diverse hosts and leads to differences in hormone levels. The relationship between T. gondii infection and host hormone response is mixed. We assessed if wild spotted hyena hormones differed by T. gondii infection. Testosterone was lower in infected female cub/subadult and adult males hyenas. Our results parallel laboratory findings but provide added realism of a wild animal.
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Affiliation(s)
- Zachary M. Laubach
- Michigan State University, Department of Integrative Biology and Program in Ecology, Evolution and Behavior, MI, USA
- University of Colorado, Boulder, Department of Ecology and Evolutionary Biology, CO, USA
- Mara Hyena Project, Kenya
- Corresponding author. University of Colorado, Boulder, Department of Ecology and Evolutionary Biology, CO, USA.
| | - Eben Gering
- Nova Southeastern University, Department of Biological Sciences, Halmos College of Natural Sciences and Oceanography, FL, USA
| | - Erik Yang
- Nova Southeastern University, Department of Biological Sciences, Halmos College of Natural Sciences and Oceanography, FL, USA
| | - Tracy M. Montgomery
- Mara Hyena Project, Kenya
- Max Planck Institute of Animal Behavior, Department for the Ecology of Animal Societies, Konstanz, Germany
| | - Thomas Getty
- Michigan State University, Department of Integrative Biology and Program in Ecology, Evolution and Behavior, MI, USA
| | - Kay E. Holekamp
- Michigan State University, Department of Integrative Biology and Program in Ecology, Evolution and Behavior, MI, USA
- Mara Hyena Project, Kenya
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27
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Smeele SQ, Conde DA, Baudisch A, Bruslund S, Iwaniuk A, Staerk J, Wright TF, Young AM, McElreath MB, Aplin L. Coevolution of relative brain size and life expectancy in parrots. Proc Biol Sci 2022; 289:20212397. [PMID: 35317667 PMCID: PMC8941425 DOI: 10.1098/rspb.2021.2397] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Previous studies have demonstrated a correlation between longevity and brain size in a variety of taxa. Little research has been devoted to understanding this link in parrots; yet parrots are well-known for both their exceptionally long lives and cognitive complexity. We employed a large-scale comparative analysis that investigated the influence of brain size and life-history variables on longevity in parrots. Specifically, we addressed two hypotheses for evolutionary drivers of longevity: the cognitivebuffer hypothesis, which proposes that increased cognitive abilities enable longer lifespans, and the expensive brain hypothesis, which holds that increases in lifespan are caused by prolonged developmental time of, and increased parental investment in, large-brained offspring. We estimated life expectancy from detailed zoo records for 133 818 individuals across 244 parrot species. Using a principled Bayesian approach that addresses data uncertainty and imputation of missing values, we found a consistent correlation between relative brain size and life expectancy in parrots. This correlation was best explained by a direct effect of relative brain size. Notably, we found no effects of developmental time, clutch size or age at first reproduction. Our results suggest that selection for enhanced cognitive abilities in parrots has in turn promoted longer lifespans.
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Affiliation(s)
- Simeon Q Smeele
- Cognitive and Cultural Ecology Research Group, Max Planck Institute of Animal Behavior, Radolfzell, Germany.,Department of Human Behavior, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany.,Department of Biology, University of Konstanz, Konstanz, Germany.,Interdisciplinary Centre on Population Dynamics, University of Southern Denmark, Odense, Denmark
| | - Dalia A Conde
- Interdisciplinary Centre on Population Dynamics, University of Southern Denmark, Odense, Denmark.,Department of Biology, University of Southern Denmark, Odense, Denmark.,Species360 Conservation Science Alliance, Bloomington, IN, USA
| | - Annette Baudisch
- Interdisciplinary Centre on Population Dynamics, University of Southern Denmark, Odense, Denmark
| | - Simon Bruslund
- Vogelpark Marlow gGmbH, Marlow, Germany.,Parrot Taxon Advisory Group, European Association of Zoos and Aquaria, Amsterdam, The Netherlands
| | - Andrew Iwaniuk
- Department of Neuroscience, University of Lethbridge, Lethbridge, Canada
| | - Johanna Staerk
- Interdisciplinary Centre on Population Dynamics, University of Southern Denmark, Odense, Denmark.,Department of Biology, University of Southern Denmark, Odense, Denmark.,Species360 Conservation Science Alliance, Bloomington, IN, USA
| | - Timothy F Wright
- Biology Department, New Mexico State University, Las Cruces, NM, USA
| | - Anna M Young
- The Living Desert Zoo and GardensPalm Desert, Palm Desert, CA, USA
| | - Mary Brooke McElreath
- Cognitive and Cultural Ecology Research Group, Max Planck Institute of Animal Behavior, Radolfzell, Germany.,Department of Human Behavior, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Lucy Aplin
- Cognitive and Cultural Ecology Research Group, Max Planck Institute of Animal Behavior, Radolfzell, Germany.,Centre for the Advanced Study of Collective Behaviour, University of Konstanz, Konstanz, Germany.,Division of Ecology and Evolution, Research School of Biology, The Australian National University, Canberra, Australia
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28
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Helle S, Tanskanen AO, Coall DA, Danielsbacka M. Matrilateral bias of grandparental investment in grandchildren persists despite the grandchildren's adverse early life experiences. Proc Biol Sci 2022; 289:20212574. [PMID: 35168400 PMCID: PMC8848246 DOI: 10.1098/rspb.2021.2574] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Evolutionary theory predicts a downward flow of investment from older to younger generations, representing individual efforts to maximize inclusive fitness. Maternal grandparents and maternal grandmothers (MGMs) in particular consistently show the highest levels of investment (e.g. time, care and resources) in their grandchildren. Grandparental investment overall may depend on social and environmental conditions that affect the development of children and modify the benefits and costs of investment. Currently, the responses of grandparents to adverse early life experiences (AELEs) in their grandchildren are assessed from a perspective of increased investment to meet increased need. Here, we formulate an alternative prediction that AELEs may be associated with reduced grandparental investment, as they can reduce the reproductive value of the grandchildren. Moreover, we predicted that paternal grandparents react more strongly to AELEs compared to maternal grandparents because maternal kin should expend extra effort to invest in their descendants. Using population-based survey data for English and Welsh adolescents, we found evidence that the investment of maternal grandparents (MGMs in particular) in their grandchildren was unrelated to the grandchildren's AELEs, while paternal grandparents invested less in grandchildren who had experienced more AELEs. These findings seemed robust to measurement errors in AELEs and confounding due to omitted shared causes.
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Affiliation(s)
- Samuli Helle
- Department of Social Research, Faculty of Social Sciences, University of Turku, Assistentinkatu 7, 20014 Turku, Finland
| | - Antti O Tanskanen
- Department of Social Research, Faculty of Social Sciences, University of Turku, Assistentinkatu 7, 20014 Turku, Finland.,Population Research Institute, 00101 Helsinki, Finland
| | - David A Coall
- School of Medical and Health Sciences, Edith Cowan University, Joondalup WA 6027, Australia
| | - Mirkka Danielsbacka
- Department of Social Research, Faculty of Social Sciences, University of Turku, Assistentinkatu 7, 20014 Turku, Finland.,Population Research Institute, 00101 Helsinki, Finland
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29
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Hagan JG, Vanschoenwinkel B, Gamfeldt L. We should not necessarily expect positive relationships between biodiversity and ecosystem functioning in observational field data. Ecol Lett 2021; 24:2537-2548. [PMID: 34532926 DOI: 10.1111/ele.13874] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 05/13/2021] [Accepted: 08/13/2021] [Indexed: 01/08/2023]
Abstract
Our current, empirical understanding of the relationship between biodiversity and ecosystem function is based on two information sources. First, controlled experiments which show generally positive relationships. Second, observational field data which show variable relationships. This latter source coupled with a lack of observed declines in local biodiversity has led to the argument that biodiversity-ecosystem functioning relationships may be uninformative for conservation and management. We review ecological theory and re-analyse several biodiversity datasets to argue that ecosystem function correlations with local diversity in observational field data are often difficult to interpret in the context of biodiversity-ecosystem function research. This occurs because biotic interactions filter species during community assembly which means that there can be a high biodiversity effect on functioning even with low observed local diversity. Our review indicates that we should not necessarily expect any specific relationship between local biodiversity and ecosystem function in observational field data. Rather, linking predictions from biodiversity-ecosystem function theory and experiments to observational field data requires considering the pool of species available during colonisation: the local species pool. We suggest that, even without local biodiversity declines, biodiversity loss at regional scales-which determines local species pools-may still negatively affect ecosystem functioning.
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Affiliation(s)
- James G Hagan
- Department of Marine Sciences, University of Gothenburg, Gothenburg, Sweden.,Gothenburg Global Biodiversity Centre, Gothenburg, Sweden
| | - Bram Vanschoenwinkel
- Community Ecology Laboratory, Department of Biology, Vrije Universiteit Brussel (VUB), Brussels, Belgium.,Centre for Environment Management, University of the Free State, Bloemfontein, South Africa
| | - Lars Gamfeldt
- Department of Marine Sciences, University of Gothenburg, Gothenburg, Sweden.,Gothenburg Global Biodiversity Centre, Gothenburg, Sweden.,Centre for Sea and Society, Gothenburg, Sweden
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