Timothy P. Spira

1.5k total citations
30 papers, 1.0k citations indexed

About

Timothy P. Spira is a scholar working on Ecology, Evolution, Behavior and Systematics, Plant Science and Nature and Landscape Conservation. According to data from OpenAlex, Timothy P. Spira has authored 30 papers receiving a total of 1.0k indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Ecology, Evolution, Behavior and Systematics, 16 papers in Plant Science and 11 papers in Nature and Landscape Conservation. Recurrent topics in Timothy P. Spira's work include Plant and animal studies (19 papers), Ecology and Vegetation Dynamics Studies (10 papers) and Plant Reproductive Biology (9 papers). Timothy P. Spira is often cited by papers focused on Plant and animal studies (19 papers), Ecology and Vegetation Dynamics Studies (10 papers) and Plant Reproductive Biology (9 papers). Timothy P. Spira collaborates with scholars based in United States. Timothy P. Spira's co-authors include Allison A. Snow, Craig R. Allen, Dennis F. Whigham, Hong Liu, Milton D. Taylor, William C. Bridges, Ian J. Renne, Lisa Katharina Wagner, Stephanie A. Foré and Albert G. Abbott and has published in prestigious journals such as Nature, Evolution and Oecologia.

In The Last Decade

Timothy P. Spira

30 papers receiving 900 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Timothy P. Spira United States 19 832 496 442 433 207 30 1.0k
Judy L. Stone United States 19 773 0.9× 561 1.1× 424 1.0× 415 1.0× 115 0.6× 31 1.0k
James E. Eckenwalder Canada 13 699 0.8× 517 1.0× 346 0.8× 174 0.4× 140 0.7× 26 1.1k
Wilfried Morawetz Austria 19 802 1.0× 406 0.8× 335 0.8× 108 0.2× 262 1.3× 42 1.0k
Shanna E. Carney United States 13 674 0.8× 480 1.0× 306 0.7× 278 0.6× 518 2.5× 16 1.1k
Glenda Vaughton Australia 24 1.3k 1.5× 954 1.9× 365 0.8× 919 2.1× 162 0.8× 43 1.5k
Q. O. N. Kay United Kingdom 17 721 0.9× 678 1.4× 359 0.8× 277 0.6× 118 0.6× 30 1.0k
Derral R. Herbst United States 12 568 0.7× 353 0.7× 244 0.6× 227 0.5× 81 0.4× 28 822
Pedro L. Ortiz Spain 23 1.2k 1.5× 911 1.8× 425 1.0× 410 0.9× 225 1.1× 91 1.6k
Ilse Silberbauer-Gottsberger Germany 19 888 1.1× 554 1.1× 255 0.6× 190 0.4× 87 0.4× 29 1.0k
Kaius Helenurm United States 18 611 0.7× 487 1.0× 161 0.4× 395 0.9× 325 1.6× 38 955

Countries citing papers authored by Timothy P. Spira

Since Specialization
Citations

This map shows the geographic impact of Timothy P. Spira'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 Timothy P. Spira with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Timothy P. Spira more than expected).

Fields of papers citing papers by Timothy P. Spira

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Timothy P. Spira. 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 Timothy P. Spira. The network helps show where Timothy P. Spira may publish in the future.

Co-authorship network of co-authors of Timothy P. Spira

This figure shows the co-authorship network connecting the top 25 collaborators of Timothy P. Spira. A scholar is included among the top collaborators of Timothy P. Spira 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 Timothy P. Spira. Timothy P. Spira is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Taylor, Milton D., et al.. (2004). Consequences of Forest Clear-Cuts for Native and Nonindigenous Ants (Hymenoptera: Formicidae). Annals of the Entomological Society of America. 97(3). 513–518. 48 indexed citations
2.
Spira, Timothy P., et al.. (2003). YELLOW JACKETS MAY BE AN UNDERESTIMATED COMPONENT OF AN ANT-SEED MUTUALISM. Southeastern Naturalist. 2(4). 609–614. 9 indexed citations
3.
Spira, Timothy P., et al.. (2002). Germination and Seed Bank Studies of Macbridea alba (Lamiaceae), a Federally Theatened Plant. 3 indexed citations
4.
Foré, Stephanie A. & Timothy P. Spira. (2002). Macrogeographic Allozyme Variation in Passiflora incarnata. The Journal of the Torrey Botanical Society. 129(4). 326–326. 2 indexed citations
5.
Liu, Hong & Timothy P. Spira. (2001). Influence of Seed Age and Inbreeding on Germination and Seedling Growth in Hibiscus moscheutos (Malvaceae). The Journal of the Torrey Botanical Society. 128(1). 16–16. 10 indexed citations
6.
Spira, Timothy P., et al.. (2001). Ant–seed mutualisms. Biological Conservation. 101(2). 249–253. 51 indexed citations
7.
Spira, Timothy P., et al.. (2001). Yellow Jackets (Vespulaspp.) Disperse Trillium (spp.) Seeds in Eastern North America. The American Midland Naturalist. 146(2). 444–446. 18 indexed citations
8.
Renne, Ian J., Timothy P. Spira, & William C. Bridges. (2001). Effects of Habitat, Burial, Age and Passage through Birds on Germination and Establishment of Chinese Tallow Tree in Coastal South Carolina. The Journal of the Torrey Botanical Society. 128(2). 109–109. 36 indexed citations
9.
Snow, Allison A., Timothy P. Spira, & Hong Liu. (2000). Effects of sequential pollination on the success of “fast” and “slow” pollen donors in Hibiscus moscheutos (Malvaceae). American Journal of Botany. 87(11). 1656–1659. 28 indexed citations
10.
Spira, Timothy P., et al.. (1996). The timing and effectiveness of sequential pollinations in Hibiscus moscheutos. Oecologia. 105(2). 230–235. 36 indexed citations
11.
Snow, Allison A. & Timothy P. Spira. (1996). POLLEN‐TUBE COMPETITION AND MALE FITNESS IN HIBISCUS MOSCHEUTOS. Evolution. 50(5). 1866–1870. 79 indexed citations
12.
Snow, Allison A. & Timothy P. Spira. (1996). Pollen-Tube Competition and Male Fitness in Hibiscus moscheutos. Evolution. 50(5). 1866–1866. 28 indexed citations
13.
Spira, Timothy P., et al.. (1994). Germination, Recruitment and Survival in the Weedy Annual Medicago polymorpha in Successive Wet and Dry Years. The American Midland Naturalist. 131(1). 98–98. 18 indexed citations
14.
Snow, Allison A. & Timothy P. Spira. (1993). INDIVIDUAL VARIATION IN THE VIGOR OF SELF POLLEN AND SELFED PROGENY IN HIBISCUS MOSCHEUTOS (MALVACEAE). American Journal of Botany. 80(2). 160–164. 38 indexed citations
15.
Snow, Allison A. & Timothy P. Spira. (1993). Individual Variation in the Vigor of Self Pollen and Selfed Progeny in Hibiscus moscheutos (Malvaceae). American Journal of Botany. 80(2). 160–160. 9 indexed citations
16.
Snow, Allison A. & Timothy P. Spira. (1991). Pollen vigour and the potential for sexual selection in plants. Nature. 352(6338). 796–797. 167 indexed citations
17.
Snow, Allison A. & Timothy P. Spira. (1991). DIFFERENTIAL POLLEN‐TUBE GROWTH RATES AND NONRANDOM FERTILIZATION IN HIBISCUS MOSCHEUTOS (MALVACEAE). American Journal of Botany. 78(10). 1419–1426. 124 indexed citations
18.
Snow, Allison A. & Timothy P. Spira. (1991). Differential Pollen-Tube Growth Rates and Nonrandom Fertilization in Hibiscus moscheutos (Malvaceae). American Journal of Botany. 78(10). 1419–1419. 28 indexed citations
19.
Spira, Timothy P., et al.. (1986). Comparative Reproductive Biology of Alpine Biennial and Perennial Gentians (Gentiana: Gentianaceae) in California. American Journal of Botany. 73(1). 39–39. 14 indexed citations
20.
Spira, Timothy P. & Lisa Katharina Wagner. (1983). Viability of Seeds Up to 211 Years Old Extracted from Adobe Brick Buildings of California and Northern Mexico. American Journal of Botany. 70(2). 303–303. 10 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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