Automated Author ProfileHajek, Kayrn L.
University of Montana
Hajek, Kayrn L.
University of Montana
Current S-Index
2.0
Sum of Dataset Indices for all datasets
Average Dataset Index per Dataset
2.0
Average Dataset Index per dataset
Total Datasets
1
Total datasets for this author
Average FAIR Score
76.9%
Average FAIR Score per dataset
Total Citations
1
Total citations to the author's datasets
Total Mentions
0
Total mentions of the author's datasets
S-Index Interpretation
The S-Index (Sharing Index) is a comprehensive metric that represents the cumulative impact of all your datasets. It is calculated as the sum of Dataset Index scores across all your claimed datasets.
What it means:
- A higher S-index indicates greater overall impact of your datasets relative to typical datasets in their fields of research
- The S-Index grows as you add more datasets or as existing datasets gain more citations and mentions
- It provides a single number to track your research data impact over time
Current S-Index: 2.0 (sum of 1 dataset Dataset Index scores)
More information here.
S-Index Over Time
Cumulative Citations Over Time
Cumulative Mentions Over Time
Datasets
- Propagule size and number often vary by several orders of magnitude among co-occurring plant species. Explaining the maintenance of this variation and understanding how propagule size contributes to coexistence remains a central challenge for community ecologists. The dominant paradigm is that a competition-colonization trade-off maintains interspecific variation in seed size, but empirical support is limited and other coexistence mechanisms, such as size-dependent seed predation, have not been examined. 2. We examined how seed size, fecundity, and other functional traits of 18 co-occurring perennial forbs trade-off with both vulnerability to rodent seed predation and competitive response to a community dominant perennial bunchgrass. We added seeds of these species to 1 m2 plots at 10 sites where we factorially manipulated rodent seed predation and competition from the community dominant, Festuca campestris. For a given plot, seeds of each species were added at densities that reflected the fecundity (i.e. per capita seed production) for each species. Moreover, we varied total seed density among plots by adding seeds at one of five relative densities (0, 0.25. 0.5, 1.0 and 1.5 times each species’ fecundity) to examine how fecundity affected overall recruitment for each species. 3. There was a trade-off between seed size and fecundity, as expected, but larger seed size was also associated with greater plant height, lower C/N ratios, and lower water use efficiency, suggesting that seed size represented a “resource acquisitive” trait syndrome (as quantified by trait principal component scores). 4. In the field experiment, the suppressive effects of seed predation on seed recruitment rate increased with increasing seed size. In contrast, smaller-seeded species with less resource acquisitive traits were more negatively affected by competition from F. campestris than were species with more resource acquisitive traits. 5. Synthesis. While the competition-colonization trade-off has been the predominant mechanism thought to maintain coexistence among species that vary in fecundity and seed size, our work suggests that susceptibility to rodent seed predation and competitive response to community dominants represent alternative mechanisms that can differentially influence plant recruitment of species based on their seed size and associated traits.
Authors
- Maron, John L. ;
- Hajek, Kayrn L. ;
- Hahn, Philip G. ;
- Pearson, Dean E. ;
- Hajek, Karyn L.
1 Citation0 Mentions77% FAIR2.0 Dataset Index
10.5061/dryad.p2h11s7August 2018