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Hernández‐Pacheco R, Plard F, Grayson KL, Steiner UK. Demographic consequences of changing body size in a terrestrial salamander. Ecol Evol 2021; 11:174-185. [PMID: 33437421 PMCID: PMC7790640 DOI: 10.1002/ece3.6988] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 10/01/2020] [Accepted: 10/14/2020] [Indexed: 11/12/2022] Open
Abstract
Changes in climate can alter individual body size, and the resulting shifts in reproduction and survival are expected to impact population dynamics and viability. However, appropriate methods to account for size-dependent demographic changes are needed, especially in understudied yet threatened groups such as amphibians. We investigated individual- and population-level demographic effects of changes in body size for a terrestrial salamander using capture-mark-recapture data. For our analysis, we implemented an integral projection model parameterized with capture-recapture likelihood estimates from a Bayesian framework. Our study combines survival and growth data from a single dataset to quantify the influence of size on survival while including different sources of uncertainty around these parameters, demonstrating how selective forces can be studied in populations with limited data and incomplete recaptures. We found a strong dependency of the population growth rate on changes in individual size, mediated by potential changes in selection on mean body size and on maximum body size. Our approach of simultaneous parameter estimation can be extended across taxa to identify eco-evolutionary mechanisms acting on size-specific vital rates, and thus shaping population dynamics and viability.
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Affiliation(s)
- Raisa Hernández‐Pacheco
- Department of Biological SciencesCalifornia State University‐Long BeachLong BeachCAUSA
- Department of BiologyUniversity of RichmondRichmondVAUSA
| | - Floriane Plard
- Swiss Ornithological InstituteSempachSwitzerland
- UMR CNRS 5558 Biométrie et Biologie EvolutiveUniversity Claude Bernard Lyon 1VilleurbanneFrance
| | | | - Ulrich K. Steiner
- Evolutionary BiologyInstitut für BiologieFreie Universität BerlinBerlinGermany
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2
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Bestley S, Ropert-Coudert Y, Bengtson Nash S, Brooks CM, Cotté C, Dewar M, Friedlaender AS, Jackson JA, Labrousse S, Lowther AD, McMahon CR, Phillips RA, Pistorius P, Puskic PS, Reis AODA, Reisinger RR, Santos M, Tarszisz E, Tixier P, Trathan PN, Wege M, Wienecke B. Marine Ecosystem Assessment for the Southern Ocean: Birds and Marine Mammals in a Changing Climate. Front Ecol Evol 2020. [DOI: 10.3389/fevo.2020.566936] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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4
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Macdonald KR, Rotella JJ, Garrott RA, Link WA. Sources of variation in maternal allocation in a long-lived mammal. J Anim Ecol 2020; 89:1927-1940. [PMID: 32356304 PMCID: PMC7497196 DOI: 10.1111/1365-2656.13243] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 04/09/2020] [Indexed: 12/03/2022]
Abstract
Life history theory predicts allocation of energy to reproduction varies with maternal age, but additional maternal features may be important to the allocation of energy to reproduction. We aimed to characterize age‐specific variation in maternal allocation and assess the relationship between maternal allocation and other static and dynamic maternal features. Mass measurements of 531 mothers and pups were used with Bayesian hierarchical models to explain the relationship between diverse maternal attributes and both the proportion of mass allocated by Weddell seal mothers, and the efficiency of mass transfer from mother to pup during lactation as well as the weaning mass of pups. Our results demonstrated that maternal mass was strongly and positively associated with the relative reserves allocated by a mother and a pup's weaning mass but that the efficiency of mass transfer declines with maternal parturition mass. Birthdate was positively associated with proportion mass allocation and pup weaning mass, but mass transfer efficiency was predicted to be highest at the mean birthdate. The relative allocation of maternal reserves declined with maternal age but the efficiency of mass transfer to pups increases, suggestive of selective disappearance of poor‐quality mothers. These findings highlight the importance of considering multiple maternal features when assessing variation in maternal allocation.
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Affiliation(s)
| | - Jay J Rotella
- Ecology Deptartment, Montana State University, Bozeman, MT, USA
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5
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Labrousse S, Sallée JB, Fraser AD, Massom RA, Reid P, Hobbs W, Guinet C, Harcourt R, McMahon C, Authier M, Bailleul F, Hindell MA, Charrassin JB. Variability in sea ice cover and climate elicit sex specific responses in an Antarctic predator. Sci Rep 2017; 7:43236. [PMID: 28233791 PMCID: PMC5324094 DOI: 10.1038/srep43236] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 01/20/2017] [Indexed: 11/09/2022] Open
Abstract
Contrasting regional changes in Southern Ocean sea ice have occurred over the last 30 years with distinct regional effects on ecosystem structure and function. Quantifying how Antarctic predators respond to such changes provides the context for predicting how climate variability/change will affect these assemblages into the future. Over an 11-year time-series, we examine how inter-annual variability in sea ice concentration and advance affect the foraging behaviour of a top Antarctic predator, the southern elephant seal. Females foraged longer in pack ice in years with greatest sea ice concentration and earliest sea ice advance, while males foraged longer in polynyas in years of lowest sea ice concentration. There was a positive relationship between near-surface meridional wind anomalies and female foraging effort, but not for males. This study reveals the complexities of foraging responses to climate forcing by a poleward migratory predator through varying sea ice property and dynamic anomalies.
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Affiliation(s)
- Sara Labrousse
- Sorbonne Universités, UPMC Univ., Paris 06, UMR 7159 CNRS-IRD-MNHN, LOCEAN-IPSL, 75005 Paris, France.,Marine Predator Unit, Institute for Marine and Antarctic Studies, University of Tasmania, Private Bag 129, Hobart, Tasmania 7001, Australia
| | - Jean-Baptiste Sallée
- Sorbonne Universités, UPMC Univ., Paris 06, UMR 7159 CNRS-IRD-MNHN, LOCEAN-IPSL, 75005 Paris, France.,British Antarctic Survey, High Cross, Cambridge, CB3 0ET, UK
| | - Alexander D Fraser
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Kita-ku, Sapporo 060-0819, Japan.,Antarctic Climate &Ecosystems Cooperative Research Centre, University of Tasmania, Private Bag 80, Hobart, Tasmania 7001, Australia
| | - Rob A Massom
- Antarctic Climate &Ecosystems Cooperative Research Centre, University of Tasmania, Private Bag 80, Hobart, Tasmania 7001, Australia.,Australian Antarctic Division, Channel Highway, Kingston, Tasmania 7050, Australia
| | - Phillip Reid
- Australian Bureau of Meteorology, Centre for Australian Weather and Climate Research, Hobart, Tasmania 7001, Australia
| | - William Hobbs
- Antarctic Climate &Ecosystems Cooperative Research Centre, University of Tasmania, Private Bag 80, Hobart, Tasmania 7001, Australia.,Centre of Excellence for Climate System Science, Australian Research Council, Sydney, New South Wales 2052, Australia
| | - Christophe Guinet
- Centre d'Etudes Biologiques de Chizé (CEBC), UMR 7372 Université de la Rochelle-CNRS, 79360 Villiers en Bois, France
| | - Robert Harcourt
- Department of Biological Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Clive McMahon
- Marine Predator Unit, Institute for Marine and Antarctic Studies, University of Tasmania, Private Bag 129, Hobart, Tasmania 7001, Australia.,Department of Biological Sciences, Macquarie University, Sydney, New South Wales 2109, Australia.,Sydney Institute of Marine Science, 19 Chowder Bay Road, Mosman, New South Wales 2088, Australia
| | - Matthieu Authier
- Observatoire PELAGIS, UMS 3462 CNRS-ULR, 17000 La Rochelle, France
| | - Frédéric Bailleul
- South Australian Research &Development Institute (SARDI), 2 Hamra Avenue, West Beach, South Australia 5024, Australia
| | - Mark A Hindell
- Marine Predator Unit, Institute for Marine and Antarctic Studies, University of Tasmania, Private Bag 129, Hobart, Tasmania 7001, Australia.,Antarctic Climate &Ecosystems Cooperative Research Centre, University of Tasmania, Private Bag 80, Hobart, Tasmania 7001, Australia
| | - Jean-Benoit Charrassin
- Sorbonne Universités, UPMC Univ., Paris 06, UMR 7159 CNRS-IRD-MNHN, LOCEAN-IPSL, 75005 Paris, France
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Xi X, Wu X, Nylin S, Sun S. Body size response to warming: time of the season matters in a tephritid fly. OIKOS 2015. [DOI: 10.1111/oik.02521] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Xinqiang Xi
- Dept of Ecology; College of Life Sciences, Nanjing Univ.; 22 Hankou Road CN-210093 Nanjing PR China
| | - Xinwei Wu
- Dept of Ecology; College of Life Sciences, Nanjing Univ.; 22 Hankou Road CN-210093 Nanjing PR China
| | - Sören Nylin
- Dept of Zoology; Stockholm Univ.; SE-106 91 Stockholm Sweden
| | - Shucun Sun
- Dept of Ecology; College of Life Sciences, Nanjing Univ.; 22 Hankou Road CN-210093 Nanjing PR China
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Inst. of Biology, Chinese Academy of Sciences; No 9 Section, 4 Renminnan Road CN-610041 Chengdu PR China
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