Anna Hargreaves

Assistant Professor,
McGill University

Department of Biology
E-mail: anna.hargreaves@mcgill.ca
Personal page




Education

Biodiversity Post-Doctoral Fellow, University of British Columbia. 2016
PhD, Queen's University. 2014
MSc, University of Calgary. 2007
BSc, Trent University. 2003


Research

My research focuses on interactions among species (biotic interactions) and the dynamics of species range limits. Much of my research is field-based; I conduct large- and small-scale experiments in natural environments to test and refine theoretical ideas in ecology and evolution that have practical conservation relevance. I am especially interested in adaptation in range-edge populations, interactions among flowers and their visitors, and the role biotic interactions play in shaping species’ geographic distributions.

QCBS students

Shannon Meadley Dunphy

Ph.D.
(Start: 2018)
Love/hate thy neighbour: neighbour shifts from hosts to competitors across the ranges of hemi-parasitic plants

Olivia Rahn

Ph.D.
(Start: 2021)
Does habitat availability decline toward species range edges?

Cameron So

Ph.D.
(Start: 2021)
Other QCBS (co-)supervisor: Daniel Schoen
Investigating the conservation value of edge populations using Sundial lupine (Lupinus perennis)
Personal page

Jory Griffith

M.Sc.
(Start: 2021)
Other QCBS (co-)supervisor: Jennifer Sunday
Effects of temperature on resource competition in phytoplankton

Ella Martin

M.Sc.
(Start: 2020)
Other QCBS (co-)supervisor: Andrew Hendry
Eco-evolutionary dynamics of seed predators and plant communities in the Galapagos Islands

Antonio Rodriguez-Campbell

M.Sc.
(Start: 2020)
What drives global patterns in the strength of species interactions?

Maggie Blondeau

M.Sc.
(Start: 2022, End: 2024)
Assessing reproductive success through the range of an at-risk perennial

Previous students (since 2009)

Cole Larsen

M.Sc.
(Start: 2018, End: 2021)
Dispersal evolution across temporally & spatially variable landscapes

Joshua Persi

M.Sc.
(Start: 2018, End: 2020)
Non-temperature determinants of species' range limits

Involvement within the QCBS

Examples of species studied

Aloe maculata
Protea


Publications

43- Clay larvae do not accurately measure biogeographic patterns in predation
Journal Article
Rodriguez‐Campbell A , Rahn O , Chiuffo M C , Hargreaves A ,
2024 Journal of Biogeography (Date Added: 2024-02-14)

42- The evolution of plasticity at geographic range edges
Journal Article
Usui T , Lerner D , Eckert I , Angert A L , Garroway C J , Hargreaves A , Lancaster L T , Lessard J , Riva F , Schmidt C , van der Burg K , Marshall K E ,
2023 Trends in Ecology and Evolution (Date Added: 2023-05-24)

41- Gradients in the time seeds take to germinate could alter global patterns in predation strength
Journal Article
Martin E , Hargreaves A L ,
2023 Journal of Biogeography (Date Added: 2023-03-31)

40- Mapping nationally and globally at-risk species to identify hotspots for (and gaps in) conservation
Journal Article
Hardouin M E , Hargreaves A L ,
2023 Proceedings of the Royal Society B: Biological Sciences (Date Added: 2023-03-26)

39- Rapid upwards spread of non-native plants in mountains across continents
Journal Article
Iseli E , Chisholm C , Lenoir J , Haider S , Seipel T , Barros A , Hargreaves A L , Kardol P , Lembrechts J J , McDougall K , Rashid I , Rumpf S B , Arévalo J R , Cavieres L , Daehler C , Dar P A , Endress B , Jakobs G , Jiménez A , Küffer C , Mihoc M , Milbau A , Morgan J W , Naylor B J , Pauchard A , Ratier Backes A , Reshi Z A , Rew L J , Righetti D , Shannon J M , Valencia G , Walsh N , Wright G T , Alexander J M ,
2023 Nature Ecology and Evolution (Date Added: 2023-02-06)

38- Seed predation increases from the Arctic to the Equator and from high to low elevations
Journal Article
,
2022 Science Advances (Date Added: 2022-05-23)

37- Think globally, measure locally: The MIREN standardized protocol for monitoring plant species distributions along elevation gradients
Journal Article
Haider S , Lembrechts J J , McDougall K , Pauchard A , Alexander J M , Barros A , Cavieres L A , Rashid I , Rew L J , Aleksanyan A , Arévalo J R , Aschero V , Chisholm C , Clark V R , Clavel J , Daehler C , Dar P A , Dietz H , Dimarco R D , Edwards P , Essl F , Fuentes‐Lillo E , Guisan A , Gwate O , Hargreaves A L , Jakobs G , Jiménez A , Kardol P , Kueffer C , Larson C , Lenoir J , Lenzner B , Padrón Mederos M A , Mihoc M , Milbau A , Morgan J W , Müllerová J , Naylor B J , Nijs I , Nuñez M A , Otto R , Preuk N , Ratier Backes A , Reshi Z A , Rumpf S B , Sandoya V , Schroder M , Speziale K L , Urbach D , Valencia G , Vandvik V , Vitková M , Vorstenbosch T , Walker T W N , Walsh N , Wright G , Zong S , Seipel T ,
2022 Ecology and Evolution (Date Added: 2022-03-03)

36- Does pollen limitation limit plant ranges? Evidence and implications
Journal Article
Dawson-Glass E , Hargreaves A L ,
2022 Philosophical transactions of the Royal Society of London. Series B, Biological sciences (Date Added: 2022-02-08)

35- Reply to: Shifting baselines and biodiversity success stories
Journal Article
Leung B , Hargreaves A L , Greenberg D A , McGill B , Dornelas M ,
2022 Nature (Date Added: 2022-02-06)

34- Reply to: Do not downplay biodiversity loss
Journal Article
Leung B , Hargreaves A L , Greenberg D A , McGill B , Dornelas M , Freeman R ,
2022 Nature (Date Added: 2022-02-06)

33- Reply to: The Living Planet Index does not measure abundance
Journal Article
Leung B , Hargreaves A L , Greenberg D A , McGill B , Dornelas M , Freeman R ,
2022 Nature (Date Added: 2022-02-06)

32- Reply to: Emphasizing declining populations in the Living Planet Report
Journal Article
Leung B , Hargreaves A L , Greenberg D A , McGill B , Dornelas M , Freeman R ,
2022 Nature (Date Added: 2022-02-06)

31- Biotic interactions are more often important at species’ warm versus cool range edges
Journal Article
Paquette A , Hargreaves A L ,
2021 Ecology Letters (Date Added: 2021-09-05)

30- Limited heat tolerance in a cold-adapted seabird: Implications of a warming Arctic
Journal Article
,
2021 Journal of Experimental Biology (Date Added: 2021-07-28)

29- Adaptation across geographic ranges is consistent with strong selection in marginal climates and legacies of range expansion
Journal Article
Bontrager M , Usui T , Lee‐Yaw J A , Anstett D N , Branch H A , Hargreaves A L , Muir C D , Angert A L ,
2021 Evolution (Date Added: 2021-05-19)

27- Author Correction: Clustered versus catastrophic global vertebrate declines (Nature, (2020), 588, 7837, (267-271), 10.1038/s41586-020-2920-6)
Journal Erratum
Leung B , Hargreaves A L , Greenberg D A , McGill B , Dornelas M , Freeman R ,
2021 Nature (Date Added: 2021-02-09)

26- High conservation priority of range-edge plant populations not matched by habitat protection or research effort
Journal Article
,
2020 Biological Conservation (Date Added: 2021-06-24)

25- Clustered versus catastrophic global vertebrate declines
Journal Article
Leung B , Hargreaves A L , Greenberg D A , McGill B , Dornelas M , Freeman R ,
2020 Nature (Date Added: 2020-11-27)

24- Spatial distribution and conservation hotspots of mammals in Canada
Journal Article
Cameron V , Hargreaves A L ,
2020 Facets (Date Added: 2020-11-12)

23- Miniaturizing landscapes to understand species distributions
Journal Article
Larsen C D , Hargreaves A L ,
2020 Ecography (Date Added: 2020-04-12)

22- Local adaptation to biotic interactions: A meta-analysis across latitudes
Journal Article
Hargreaves A L , Germain R M , Bontrager M , Persi J , Angert A L ,
2020 American Naturalist (Date Added: 2020-03-09)

21- Lasting signature of forest fragmentation
Journal Article
Hargreaves A ,
2019 Science (Date Added: 2019-12-22)

20- Thermal tolerance patterns across latitude and elevation
Journal Article
Sunday J , Bennett J M , Calosi P , Clusella-Trullas S , Gravel S , Hargreaves A L , Leiva F P , Verberk W C E P , Olalla-Tárraga M ,
2019 Philosophical transactions of the Royal Society of London. Series B, Biological sciences (Date Added: 2019-07-08)

19- Narrow entrance of short-tubed Aloe flowers facilitates pollen transfer on long sunbird bills
Journal Article
Hargreaves A , Langston G , Johnson S ,
2019 South African Journal of Botany (Date Added: 2019-05-20)

18- Seed predation increases from the Arctic to the Equator and from high to low elevations
Journal Article
Hargreaves A L , Suárez E , Mehltreter K , Myers-Smith I , Vanderplank S E , Slinn H L , Vargas-Rodriguez Y L , Haeussler S , David S , Muñoz J , Carlos Almazán-Núñez R , Loughnan D , Benning J W , Moeller D A , Brodie J F , Thomas H J , Morales M P A ,
2019 Science Advances (Date Added: 2019-03-04)

17- Local adaptation primes cold-edge populations for range expansion but not warming-induced range shifts
Journal Article
Hargreaves A L , Eckert C G ,
2018 Ecology Letters (Date Added: 2018-11-21)

16- Expanding, shifting and shrinking: The impact of global warming on species’ elevational distributions
Journal Article
Freeman B G , Lee-Yaw J A , Sunday J M , Hargreaves A L ,
2018 Global Ecology and Biogeography (Date Added: 2018-09-23)

15- Local adaptation interacts with expansion load during range expansion: Maladaptation reduces expansion load
Journal Article
Gilbert, KJ, Sharp, NP, Angert, AL, Conte, GL, Draghi, JA, Guillaume, F, Hargreaves, AL, Matthey-Doret, R, Whitlock, MC
2017 American Naturalist (Date Added: 2018-01-19)

14- Adaptation to fragmentation: Evolutionarydynamics driven by human influences
Journal Article
Cheptou, PO, Hargreaves, AL, Bonte, D, Jacquemyn, H
2017 Philosophical Transactions of the Royal Society B: Biological Sciences (Date Added: 2018-01-19)

13- Fitness declines towards range limits and local adaptation to climate affect dispersal evolution during climate-induced range shifts
Journal Article
Hargreaves, AL, Bailey, SF, Laird, RA
2015 Journal of Evolutionary Biology (Date Added: 2018-01-19)

12- High-elevation range limit of an annual herb is neither caused nor reinforced by declining pollinator service
Journal Article
Hargreaves, AL, Weiner, JL, Eckert, CG
2015 Journal of Ecology (Date Added: 2018-01-19)

11- Evolution of dispersal and mating systems along geographic gradients: Implications for shifting ranges
Journal Article
Hargreaves, AL, Eckert, CG
2014 Functional Ecology (Date Added: 2018-01-19)

10- Are species' range limits simply niche limits writ large? A review of transplant experiments beyond the range
Journal Article
Hargreaves, AL, Samis, KE, Eckert, CG
2014 American Naturalist (Date Added: 2018-01-19)

9- Floral traits mediate the vulnerability of aloes to pollen theft and inefficient pollination by bees
Journal Article
Hargreaves, AL, Harder, LD, Johnson, SD
2012 Annals of Botany (Date Added: 2018-01-19)

8- Concentrations of 17 elements, including mercury, in the tissues, food and abiotic environment of arctic shorebirds
Journal Article
Hargreaves, AL, Whiteside, DP, Gilchrist, G
2011 Science of the Total Environment (Date Added: 2018-01-19)

7- Concentrations of 17 elements, including mercury, and their relationship to fitness measures in arctic shorebirds and their eggs
Journal Article
Hargreaves, AL, Whiteside, DP, Gilchrist, G
2010 Science of the Total Environment (Date Added: 2018-01-19)

6- Native pollen thieves reduce the reproductive success of a hermaphroditic plant, Aloe maculata
Journal Article
Hargreaves, AL, Harder, LD, Johnson, SD
2010 Ecology (Date Added: 2018-01-19)

5- Consumptive emasculation: The ecological and evolutionary consequences of pollen theft
Journal Article
Hargreaves, AL, Harder, LD, Johnson, SD
2009 Biological Reviews (Date Added: 2018-01-19)

4- Aloe inconspicua: The first record of an exclusively insect-pollinated aloe
Journal Article
Hargreaves, AL, Harder, LD, Johnson, SD
2008 South African Journal of Botany (Date Added: 2018-01-19)

3- Empty flowers as a pollination-enhancement strategy
Journal Article
Bailey, SF, Hargreaves, AL, Hechtenthal, SD, Laird, RA, Latty, TM, Reid, TG, Teucher, AC, Tindall, JR
2007 Evolutionary Ecology Research (Date Added: 2018-01-19)

2- Dark, bitter-tasting nectar functions as a filter of flower visitors in a bird-pollinated plant
Journal Article
Johnson, SD, Hargreaves, AL, Brown, M
2006 Ecology (Date Added: 2018-01-19)

1- Do floral syndromes predict specialization in plant pollination systems? An experimental test in an "ornithophilous" African Protea
Journal Article
Hargreaves, AL, Johnson, SD, Nol, E
2004 Oecologia (Date Added: 2018-01-19)

In the media

What areas should Canada protect to save species at risk of extinction?
(Claire Loewen) 2023-07-05

What areas should Canada protect to save species at risk of extinction?
(Claire Loewen) 2023-04-05

McGill scholars respond to COP15 Biodiversity Conference
(Daniel Lukes) 2023-01-12

McGill scholars respond to COP15 Biodiversity Conference
(Daniel Lukes, Communications Officer, Bieler School of Environment) 2023-01-12

$2.9 million from the Government of Canada for McGill Research
(Meaghan Thurston, Associate Director, Research Communications) 2022-04-05

Bring Home The Tarantulas? As Research Halts, Scientists Face Difficult Decisions
2020-04-01

Experts: International Women's Day | March 8
2020-03-03

Adaptation: Competition and predation may not be the driving force scientists thought
2020-02-25

29th edition of Soup and Science
(Yishay, McLauchlan,etc) 2020-01-21

Fractured forests are endangering wildlife, scientists find
2020-01-11

Wildlife in tropics hardest hit by forests being broken up
2019-12-05

Fractured Forests Are Endangering Wildlife, Scientists Find
(Carl Zimmer) 2019-12-05

Researchers receive $6.5M in funding from CFI and Government of Quebec
(Amanda Testani) 2019-09-13

Plus d'interaction entre les espèces sous les tropiques
2019-03-06

Smithers Research Site Among Plant, Animal Species Interaction Study Across Americas
2019-02-22

Mega-Experiment Shows Species Interactions Stronger Towards Tropics and Lowlands
2019-02-20

Global warming pushing alpine species higher and higher
(Balma, Chris) 2018-09-10

Exploring nature's diversity — women and research in biology
2018-05-02