Lawrence D. Harder

15.7k total citations · 3 hit papers
134 papers, 10.0k citations indexed

About

Lawrence D. Harder is a scholar working on Ecology, Evolution, Behavior and Systematics, Plant Science and Nature and Landscape Conservation. According to data from OpenAlex, Lawrence D. Harder has authored 134 papers receiving a total of 10.0k indexed citations (citations by other indexed papers that have themselves been cited), including 125 papers in Ecology, Evolution, Behavior and Systematics, 76 papers in Plant Science and 62 papers in Nature and Landscape Conservation. Recurrent topics in Lawrence D. Harder's work include Plant and animal studies (120 papers), Plant Parasitism and Resistance (67 papers) and Ecology and Vegetation Dynamics Studies (60 papers). Lawrence D. Harder is often cited by papers focused on Plant and animal studies (120 papers), Plant Parasitism and Resistance (67 papers) and Ecology and Vegetation Dynamics Studies (60 papers). Lawrence D. Harder collaborates with scholars based in Canada, Argentina and United States. Lawrence D. Harder's co-authors include Marcelo A. Aizen, Spencer C. H. Barrett, Steven D. Johnson, James D. Thomson, William G. Wilson, Anne C. Worley, Przemysław Prusinkiewicz, Anna L. Hargreaves, William W. Cole and Lucas A. Garibaldi and has published in prestigious journals such as Nature, Science and Proceedings of the National Academy of Sciences.

In The Last Decade

Lawrence D. Harder

134 papers receiving 9.4k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

The Global Stock of Domesticated Honey Bees Is Growing Slower Than Agricultural Demand for Pollination

2009 809 citations Marcelo A. Aizen, Lawrence D. Harder profile →
Mating cost of large floral displays in hermaphrodite plants

1995 469 citations Lawrence D. Harder, Spencer C. H. Barrett profile →
Global growth and stability of agricultural yield decrease with pollinator dependence

2011 315 citations Lucas A. Garibaldi, Marcelo A. Aizen et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Lawrence D. Harder Canada	54	9.0k	5.7k	3.7k	2.5k	2.4k	134	10.0k
Tia‐Lynn Ashman United States	55	8.8k 1.0×	7.8k 1.4×	4.7k 1.3×	3.1k 1.3×	1.4k 0.6×	210	11.9k
Diane R. Campbell United States	46	7.9k 0.9×	5.5k 1.0×	4.9k 1.3×	1.6k 0.6×	1.0k 0.4×	129	8.8k
James D. Thomson Canada	66	12.2k 1.4×	7.6k 1.3×	5.0k 1.4×	2.6k 1.0×	3.4k 1.4×	169	13.3k
W. Scott Armbruster United States	53	8.7k 1.0×	5.7k 1.0×	4.3k 1.2×	2.3k 0.9×	1.2k 0.5×	171	10.3k
Rebecca E. Irwin United States	50	7.6k 0.9×	5.0k 0.9×	3.0k 0.8×	960 0.4×	3.3k 1.4×	161	8.9k
Mark D. Rausher United States	62	7.7k 0.9×	4.5k 0.8×	3.4k 0.9×	3.4k 1.4×	2.7k 1.1×	182	11.8k
Jeff Ollerton United Kingdom	44	9.7k 1.1×	6.4k 1.1×	4.3k 1.2×	1.1k 0.5×	3.1k 1.3×	127	10.7k
Andrew G. Stephenson United States	51	5.9k 0.7×	5.2k 0.9×	2.8k 0.8×	2.8k 1.1×	1.2k 0.5×	140	8.1k
Jon Ågren Sweden	54	6.0k 0.7×	5.3k 0.9×	3.9k 1.1×	2.2k 0.9×	883 0.4×	152	8.7k
Peter G. Kevan Canada	49	8.0k 0.9×	4.5k 0.8×	1.9k 0.5×	1.4k 0.5×	4.2k 1.7×	238	10.5k

Countries citing papers authored by Lawrence D. Harder

Since Specialization

Citations

This map shows the geographic impact of Lawrence D. Harder's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Lawrence D. Harder with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Lawrence D. Harder more than expected).

Fields of papers citing papers by Lawrence D. Harder

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Lawrence D. Harder. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Lawrence D. Harder. The network helps show where Lawrence D. Harder may publish in the future.

Co-authorship network of co-authors of Lawrence D. Harder

This figure shows the co-authorship network connecting the top 25 collaborators of Lawrence D. Harder. A scholar is included among the top collaborators of Lawrence D. Harder based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Lawrence D. Harder. Lawrence D. Harder is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Harder, Lawrence D. & Steven D. Johnson. (2025). Pollination efficiency and the evolution of sex allocation – diminishing returns matter. New Phytologist. 246(1). 39–46. 2 indexed citations

Garibaldi, Lucas A., Marcelo A. Aizen, Saul A. Cunningham, Lawrence D. Harder, & Alexandra‐Maria Klein. (2016). Incremental contribution of pollination and other ecosystem services to agricultural productivity. 1 indexed citations

Aizen, Marcelo A., Carolina L. Morales, Diego P. Vázquez, et al.. (2014). When mutualism goes bad: density‐dependent impacts of introduced bees on plant reproduction. New Phytologist. 204(2). 322–328. 95 indexed citations

Johnson, Steven D., et al.. (2013). The evolution of floral nectaries in Disa (Orchidaceae: Disinae): recapitulation or diversifying innovation?. Annals of Botany. 112(7). 1303–1319. 18 indexed citations

Harder, Lawrence D. & Przemysław Prusinkiewicz. (2012). The interplay between inflorescence development and function as the crucible of architectural diversity. Annals of Botany. 112(8). 1477–1493. 93 indexed citations

Morales, Carolina L., Anna Traveset, & Lawrence D. Harder. (2012). Sterile flowers increase pollinator attraction and promote female success in the Mediterranean herb Leopoldia comosa. Annals of Botany. 111(1). 103–111. 21 indexed citations

Harder, Lawrence D., et al.. (2011). HOW DEPRESSED? ESTIMATES OF INBREEDING EFFECTS DURING SEED DEVELOPMENT DEPEND ON REPRODUCTIVE CONDITIONS. Evolution. 66(5). 1375–1386. 10 indexed citations

Harder, Lawrence D. & Steven D. Johnson. (2009). Darwin's beautiful contrivances: evolutionary and functional evidence for floral adaptation. New Phytologist. 183(3). 530–545. 339 indexed citations

Aizen, Marcelo A. & Lawrence D. Harder. (2009). Geographic variation in the growth of domesticated honey-bee stocks. Communicative & Integrative Biology. 2(6). 464–466. 20 indexed citations

10.

Prusinkiewicz, Przemysław, Yvette Erasmus, Brendan Lane, Lawrence D. Harder, & Enrico Coen. (2007). Evolution and Development of Inflorescence Architectures. Science. 316(5830). 1452–1456. 297 indexed citations

11.

Aizen, Marcelo A. & Lawrence D. Harder. (2007). EXPANDING THE LIMITS OF THE POLLEN-LIMITATION CONCEPT: EFFECTS OF POLLEN QUANTITY AND QUALITY. Ecology. 88(2). 271–281. 420 indexed citations

12.

Barrett, Spencer C. H., Lawrence D. Harder, & William W. Cole. (2004). CORRELATED EVOLUTION OF FLORAL MORPHOLOGY AND MATING-TYPE FREQUENCIES IN A SEXUALLY POLYMORPHIC PLANT. Evolution. 58(5). 964–975. 59 indexed citations

13.

Harder, Lawrence D.. (1998). Pollen-size comparisons among animal-pollinated angiosperms with different pollination characteristics. Biological Journal of the Linnean Society. 64(4). 513–525. 64 indexed citations

14.

Pritchard, Gordon, Lawrence D. Harder, & R. A. Mutch. (1996). Development of aquatic insect eggs in relation to temperature and strategies for dealing with different thermal environments. Biological Journal of the Linnean Society. 58(2). 221–244. 80 indexed citations

15.

Barrett, Spencer C. H. & Lawrence D. Harder. (1996). Ecology and evolution of plant mating. Trends in Ecology & Evolution. 11(2). 73–79. 282 indexed citations

16.

Harder, Lawrence D., et al.. (1996). The comparative biology of pollination and mating in flowering plants. Philosophical Transactions of the Royal Society B Biological Sciences. 351(1345). 1271–1280. 293 indexed citations

17.

Vonhof, Maarten J. & Lawrence D. Harder. (1995). Size‐number trade‐offs and pollen production by Papilionaceous legumes. American Journal of Botany. 82(2). 230–238. 76 indexed citations

18.

Harder, Lawrence D.. (1990). Behavioral responses by bumble bees to variation in pollen availability. Oecologia. 85(1). 41–47. 142 indexed citations

19.

Harder, Lawrence D., James D. Thomson, Mitchell B. Cruzan, & Robert S. Unnasch. (1985). Sexual reproduction and variation in floral morphology in an ephemeral vernal lily, Eyythronium americanum. Oecologia. 67(2). 286–291. 69 indexed citations

20.

Schowalter, David B., J. R. Gunson, & Lawrence D. Harder. (1979). Life history characteristics of Little Brown Bats (Myotis lucifugus) in Alberta. The Canadian Field-Naturalist. 93(3). 243–251. 25 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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