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Publications & Outreach

papers organized by topic here

Anna Hargreaves Alberta flower brown eyed susan fieldwork ecology evolution pollination
paintbrush in Alberta
from Hargreaves et al J Ecology (in press)
Anna Hargreaves alberta pollination flower wood lily fieldwork
Edited Image 2016-02-05 21-06-30
P1050794 ladybug.JPG

*Due to copyright restrictions I can't post PDFs of some articles, but I can email you a copy if you like

Links to archived theses are given in the alumni section of the 'people' page

blue=student in Hargreaves lab


Mapping nationally and globally at-risk species to identify hotspots for (and gaps in) conservation

Hardouin, ME, AL Hargreaves.

Proceedings of the Royal Society B. In Press.

Gradients in how long seeds take to germinate could alter global patterns in predation strength

Martin, E, AL Hargreaves.

Journal of Biogeography. 1-13.

Rapid upwards spread of nonnative plants in mountains globally

Iseli, E, C Chisholm, S Haider, T Seipel, Agustina Barrios, AL Hargreaves, 26 authors listed alphabetically, JM Alexander. 2023.
Nature Ecology Evolution. 1-9.  media coverage


Warming in the land of the midnight sun: breeding birds may suffer greater heat stress at high- vs. low-Arctic sites

O’Connor, R, A Le Pogam, K Young, O Love, C Cox, G Roy, F Robitaille, K Elliott, AL Hargreaves, E Choy, HG Gilchrist, D Berteaux, A Tam, F Vézina

Proceedings of the Royal Society B. 289 (1981): 20220300.

Effects of species interactions on the potential for evolution at species' range limits

JM Alexander, DZ Atwater, RI Colautti, AL Hargreaves.

Philosophical Transactions of the Royal Society B, 377 (1848): 20210020.

Does pollen limitation limit plant ranges? Evidence and implications

Dawson-Glass, E, AL Hargreaves.

Philosophical Transactions of the Royal Society B, 377 (1846): 20210014.

Think globally, measure locally: the MIREN standardized protocol for monitoring species distributions along elevational gradients

Haider, S, J Lembrechts, K McDougall, A Pauchard, 51 authors listed alphabetically including AL Hargreaves, T Seipel.
Ecology & Evolution. 12(2): e8590.


Biotic interactions are more often important at species' warm vs. cool range-edges

Paquette, A, AL Hargreaves

Ecology Letters. 24(11): 2427-2438. (data & Rcode)

Adaptation across geographic ranges is consistent with strong selection in marginal climates & legacies of range expansion

Bontrager, M, T Usui, JA Lee-Yaw, DN Anstett, HA Branch, AL Hargreaves, CD Muir, AL Angert.

Evolution. 75: 1316-1333

Limited heat tolerance in a cold-adapted seabird: implications of a warming Arctic

Choy, ES, RS O'Connor, HG Gilchrist, AL Hargreaves, OP Love, F Vézina, KH Elliot

Journal of Experimental Biology. 224: jeb242168

Limited heat tolerance in an Arctic passerine: Thermoregulatory implications for cold‐specialized birds in a rapidly warming world

O'Connor, RS, A Le Pogam, KG Young, F Robitaille, ES Choy, OP Love, KH Elliott, AL Hargreaves, D Berteaux, A Tam, F Vézina

Ecology & Evolution. 11: 1609-1619


Clustered vs. catastrophic global vertebrate declines

Leung B, AL Hargreaves, D Greenberg, B McGill, M Dornelas, R Freeman.

Nature. 588: 267-271 (PDF)

There was some interesting debate around our article, that you can read in the matters arising and our responses to them (all published in 2022):  Or you can read a much shorter twitter summary here

LPI does not reflect population abundance (its true & this is an important point!) (PDF)

Pay attention to declining populations (agree - requires identifying them which the LPIndex does not) PDF

Don't downplay biodiversity loss (we didn't & its bad enough it doesnt need to be overplayed either) PDF

Baselines shift (good point but using recent data on declines/recoveries is still important) PDF

High conservation priority of range-edge plant populations not matched by habitat protection or research effort

Caissy, P, S Klemet-N’Guessan, R Jackewi, CG Eckert, AL Hargreaves.

Biological Conservation. 249: 108732 (data & Rcode, PDF)

Spatial distribution and conservation hotspots of mammals in Canada

Cameron, V, AL Hargreaves.

FACETS.  5: 692-703

Miniaturizing species distributions to understand evolving range dynamics

Larsen, C, AL Hargreaves.

Ecography. 43: 1625-1638 (short listed for E4 award).

Local adaptation to biotic interactions: a meta-analysis across latitudes

Hargreaves, AL, R Germain, M Bontrager, J Persi, A Angert.

American Naturalist. 195: 395-411 (press release, PDF)


Lasting signature of forest fragmentation

Hargreaves, AL.

Science. 366: 1196-7. (invited perspectives piece)

Seed predation increases from the Arctic to the Equator and from high to low elevations

Hargreaves, AL, E Suarez, K Mehltreter, I Myers-Smith, S Vanderplank, H Slinn, Y Vargas-Rodriguez,

S Haeussler, S David, J Muñoz, R Almazán-Nuñez, D Loughnan, J Benning, D Moeller, J Brodie, H

Thomas, P Morales.

Science Advances. 5 eaau4403 (data, media coverage)

NOTE: as of 2022 this article is a corrected version of the original. After fixing a mistake in the coding of the response variable in our binomial GLMModels, the latitudinal and elevational declines in seed predation are twice as strong as originally reported.

Narrow entrance of short-tubed Aloe flower facilitates pollen transfer on long sunbird bills

Hargreaves, AL, GT Langston, SD Johnson.

South African Journal of Botany. 124: 23-28.

Local adaptation primes cold-edge populations for range expansion but not warming-induced range shifts Hargreaves, AL & CG Eckert.

Ecology Letters. 22: 78-88. (data & R code, media coverage, PDF, SI)

Thermal tolerance patterns across latitude & elevation

Sunday, J, J Bennett, P Calosi, S Clusella-Trullas, S Gravel, AL Hargreaves, F Leiva, et al.
Philosophical Transactions of the Royal Soc. B. 374.


Expanding, shifting, and shrinking: The impact of global warming on species' elevational distributions Freeman B, J Lee-Yaw, J Sunday, AL Hargreaves.

Global Ecology & Biogeography. 27: 1268-1276. (media coverage, PDF)


Adaptation to fragmentation

Cheptou, PO, AL Hargreaves, D Bonte, H Jacquemyn. 

Philosophical Transactions of the Royal Society B. 372 (1712), 20160037. (Corrected refs for Table1)

Local maladaptation reduces expansion load during range expansion

Gilbert KJ, NP Sharp, AL Angert*, GL Conte*, JA Draghi*, F Guillaume*, AL Hargreaves*, R Matthey-Doret*, MC Whitlock.

American Naturalist. 189: 368-380. (summary)

2016 - maternity leave


Fitness declines toward range limits & local adaptation to climate affect dispersal evolution during climate-induced range shifts

Hargreaves, AL, SF Bailey, RA Laird.

Journal of Evolutionary Biology. 28: 1489-1501. (Appendix, data & R code)

High-elevation range limit of an annual herb is neither caused nor reinforced by declining

pollinator service

Hargreaves, AL, JL Weiner, CG Eckert.

Journal of Ecology. 103: 572-584. (data)


Are species' range limits simply niche limits writ large? A review of transplant experiments beyond the  range

Hargreaves, AL, KE Samis, CG Eckert.

American Naturalist. 183: 175-183. (blog summary, DOI, Appendices, data)


Evolution of dispersal and mating systems along geographic gradients: implications for shifting ranges

Hargreaves, AL & CG Eckert.

Functional Ecology. 28: 5-21. (summary)

2012 and earlier


Floral traits mediate the vulnerability of aloes to pollen theft and inefficient pollination by bees.

Hargreaves, AL, LD Harder & SD Johnson. 2012.  

Annals of Botany. 109: 761-772. (PDF)

Concentrations of 17 elements, including mercury, in the tissues, food and abiotic environment of Arctic shorebirds.

Hargreaves, AL, DP Whiteside & G Gilchrist. 2011.  

Science of the Total Environment. 409: 3757-3770. (DOI, PDF, Appendices)

Native pollen thieves reduce the reproductive success of a hermaphroditic plant, Aloe maculata.

Hargreaves, AL, LD Harder & SD Johnson. 2010.  

Ecology 91:1693-1703. (PDF)

Concentrations of 17 elements, including mercury, and their relationship to fitness measures in arctic shorebirds and their eggs.

Hargreaves, AL, DP Whiteside & G Gilchrist. 2010.  

Science of the Total Environment 408: 3153-3161. (DOI, PDF, Appendix)

Consumptive emasculation: the ecological and evolutionary consequences of pollen theft.

Hargreaves, AL, LD Harder & SD Johnson. 2009. 

Biological Reviews 84: 259-276. (DOI, PDF)

Aloe inconspicua: the first record of an exclusively insect-pollinated aloe.

Hargreaves, AL, LD Harder & SD Johnson. 2008.  

South African Journal of Botany 74: 606-612. (PDF)

Empty flowers as a pollination-enhancement strategy.

Bailey, SF, AL Hargreaves, SD Hechtenthal, RA Laird, TM Latty, TG Reid, AC Teucher & JR Tindall. 2007.

Evolutionary Ecology Research 9: 1245-1262. (PDF)

Dark, bitter-tasting nectar functions as a filter of flower visitors in a bird-pollinated plant.

Johnson, SD, AL Hargreaves & M Brown. 2006.  

Ecology 87: 2709-2716. (PDF)


Do floral syndromes predict specialization in plant pollination systems? An experimental test in an "ornithophilous" African Protea.

Hargreaves, AL, SD Johnson & E Nol. 2004.  

Oecologia 140: 295-301. (PDF)

Popular science & outreach

Selected outreach talks

2020. Liars cheaters & thieves: the hidden side of pollination. Lake OHara National Park talk series 

2019. The Future of Nature. McGill annual Mini-Science evening lecture series. (recorded talk).

2018. Exploring Nature's Diversity (with lessons for our daily lives). McGill Mini-Science (watch the talk)

2015. Fortress flower: floral defenses are way cool because....  Beatty Biodiversity Museum. (watch talk)

Selected popular science writing

2021. Greenberg, D, AL Hargreaves, A Mooers, B Leung. 2021. Conservation hope: Many wildlife species

can recover if given a chance. The Conversation.

2020. Beyond species: How will global change affect species interactions? Alpine Club of Canada State of the Mountains Report. p25

2019. Arctic-To-Equator experiment... Summary of article eaau4403 for ScienceTrends. (read here)

2014. Why stop there?  guest blog post for ecoevoevoeco blog (read post).

2012. article re PhD research for Friends of Fishcreek (Provincial Park) July newsletter.

​2008. Conserving Alberta’s amphibians. Wild Lands Advocate 16: 14-15. (read article)

Articles in the Calgary Zoo's monthly newsletter, What's New at the Zoo.

    Jan 2009. Meet Ghana's amphibians. (article, pg 8)

    Nov 2008. Chasing shorebirds in the arctic. (article, pg 5).

    Mar 2008. Arctic Ho!  Researcher heads north to study shorebirds.

    Jan 2008. It's all about instinct: studying northern leopard frogs.


2004. Banding of saw-whet owls at the Oliver Centre.  Orchid (Journal of the Peterborough Field Naturalists) vol 50. (reproduced on pg 11 of the Trent Oliver Property Annual Report)

global vertebrate declines LPI Nature
Miniaturizing landscapes to understand species distributions Ecography podcast
species interactions, darwins idea, seed predation
malachite sunbird pollination
species range shift infographic
Bombus+Rhinanthus+pollination, bumble bee
meta-analysis of range limit transplant experiments American Naturalist
Evolution of dispersal and mating systems Abronia umbellata
Ecology 87(11) Dark bitter tasting nectar functions as a filter of flower visitors in a bird-pollinated Aloe
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