The effects of resource pulses on natural communities are known to vary with the type of pulse. However, less is known about mechanisms that determine the responses of different species to the same pulse. We hypothesized that these differences are related to the size of the species, as increasing size may be correlated with increasing competitive ability and decreasing tolerance to predation. A factorial experiment quantified the magnitude and timing of species’ responses to a resource pulse using the aquatic communities found in the leaves of the carnivorous pitcher plant, Sarracenia purpurea. We added prey to leaves and followed the abundances of bacteria and bacterivores (protozoa and rotifers) in the presence and absence of a top predator, larvae of the mosquito Wyeomyia smithii. Resource pulses had significant positive effects on species abundances and diversity in this community; however, the magnitude and timing of responses varied among the bacterivore species and was not related to body size. Larger bacterivores were significantly suppressed by predators, while smaller bacterivores were not; predation also significantly reduced bacterivore species diversity. There were no interactions between the effects of the resource pulse and predation on protozoa abundances. Over 67 days, some species returned to pre-pulse abundances quickly, others did not or did so very slowly, resulting in new community states for extended periods of time. This study demonstrates that species-specific differences in responses to resource pulses and predation are complex and may not be related to simple life history trade-offs associated with size.
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Beisner B, Haydon D, Cuddington K (2003) Alternative stable states in ecology. Front Ecol Environ 1:376–382. https://doi.org/10.1890/1540-9295(2003)001%5b0376:assie%5d2.0.co;2
Chesson P, Gebauer RL, Schwinning S et al (2004) Resource pulses, species interactions, and diversity maintenance in arid and semi-arid environments. Oecologia 141:236–253
Cochran-Stafira DL, von Ende CN (1998) Integrating bacteria into food webs: studies with Sarracenia purpurea inquilines. Ecology 79:880–898
Davis MA, Grime JP, Thompson K (2000) Fluctuating resources in plant communities: a general theory of invasibility. J Ecol 88:528–534. https://doi.org/10.1046/j.1365-2745.2000.00473.x
Drever MC, Goheen JR, Martin K (2009) Species–energy theory, pulsed resources, and regulation of avian richness during a mountain pine beetle outbreak. Ecology 90:1095–1105
Ellison AM (2010) Partitioning diversity. Ecology 91:1962–1963. https://doi.org/10.1890/09-1692.1
Field A, Miles J, Field Z (2012) Discovering statistics using R. SAGE Publications, Los Angeles
Gallie DR, Chang S-C (1997) Signal transduction in the carnivorous plant Sarracenia purpurea. Regulation of secretory hydrolase expression during development and in response to resources. Plant Physiol 115:1461–1471
Gratton C, Denno RF (2003) Inter-year carryover effects of a nutrient pulse on Spartina plants, herbivores, and natural enemies. Ecology 84:2692–2707
Grover JP (1988) Dynamics of competition in a variable environment: experiments with two diatom species. Ecology 69:408–417. https://doi.org/10.2307/1940439
Hairston NG, Ellner SP, Geber MA et al (2005) Rapid evolution and the convergence of ecological and evolutionary time. Rapid evolution and the convergence of ecological and evolutionary time. Ecol Lett 8:1114–1127. https://doi.org/10.1111/j.1461-0248.2005.00812.x
Hill MO (1973) Diversity and evenness: a unifying notation and its consequences. Ecology 54:427–432
Hoekman D (2007) Top-down and bottom-up regulation in a detritus-based aquatic food web: A repeated field experiment using the pitcher plant (Sarracenia purpurea) inquiline community. Am Midl Nat 157:52–62
Hoekman D (2011) Relative importance of top-down and bottom-up forces in food webs of Sarracenia pitcher communities at a northern and a southern site. Oecologia 165:1073–1082. https://doi.org/10.1007/s00442-010-1802-2
Hoekman D, Dreyer J, Jackson RD et al (2011) Lake to land subsidies: experimental addition of aquatic insects increases terrestrial arthropod densities. Ecology 92:2063–2072. https://doi.org/10.1890/11-0160.1
Holling CS (1973) Resilience and stability of ecological systems. Annu Rev Ecol Syst 4:1–23. https://doi.org/10.1146/annurev.es.04.110173.000245
Holt RD (2008) Theoretical perspectives on resource pulses. Ecology 89:671–681
Kneitel JM (2012) Are trade-offs among species’ ecological interactions scale dependent? A test using pitcher-plant inquiline species. PLoS One 7:e41809. https://doi.org/10.1371/journal.pone.0041809
Kneitel JM, Miller TE (2002) Resource and top-predator regulation in the pitcher plant (Sarracenia purpurea) inquiline community. Ecology 83:680–688
Kneitel JM, Miller TE (2003) Dispersal rates affect species composition in metacommunities of Sarracenia purpurea inquilines. Am Nat 162:165–171
Lau MK, Baiser B, Northrop A et al (2018) Regime shifts and hysteresis in the pitcher-plant microecosystem. Ecol Model 382:1–8. https://doi.org/10.1016/j.ecolmodel.2018.04.016
Litchman E, Klausmeier CA, Yoshiyama K (2009) Contrasting size evolution in marine and freshwater diatoms. P Natl Acad Sci USA 106:2665–2670. https://doi.org/10.1073/pnas.0810891106
Mallon CA, Poly F, Le Roux X et al (2015) Resource pulses can alleviate the biodiversity–invasion relationship in soil microbial communities. Ecology 96:915–926. https://doi.org/10.1890/14-1001.1
Meserve PL, Kelt DA, Milstead WB, Gutiérrez JR (2003) Thirteen years of shifting top-down and bottom-up control. Bioscience 53:633–646. https://doi.org/10.1641/0006-3568(2003)053%5b0633:tyosta%5d2.0.co
Miller TE, terHorst CP (2012) Testing successional hypotheses of stability, heterogeneity, and diversity in pitcher-plant inquiline communities. Oecologia 170:243–251. https://doi.org/10.1007/s00442-012-2292-1
Morris EK, Caruso T, Buscot F et al (2014) Choosing and using diversity indices: insights for ecological applications from the German Biodiversity Exploratories. Ecol Evol 4:3514–3524. https://doi.org/10.1002/ece3.1155
Mouquet N, Daufresne T, Gray SM, Miller TE (2008) Modelling the relationship between a pitcher plant (Sarracenia purpurea) and its phytotelma community: mutualism or parasitism? Funct Ecol 22:728–737. https://doi.org/10.1111/j.1365-2435.2008.01421.x
Nowlin WH, Vanni MJ, Yang LH (2008) Comparing resource pulses in aquatic and terrestrial ecosystems. Ecology 89:647–659
Ostfeld RS, Keesing F (2000) Pulsed resources and community dynamics of consumers in terrestrial ecosystems. Trends Ecol Evol 15:232–237. https://doi.org/10.1016/s0169-5347(00)01862-0
Peterson CN, Day S, Wolfe BE et al (2008) A keystone predator controls bacterial diversity in the pitcher-plant (Sarracenia purpurea) microecosystem. Environ Microbiol 10:2257–2266. https://doi.org/10.1111/j.1462-2920.2008.01648.x
R Core Team (2013) R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. http://www.R-project.org/. Accessed 30 Aug 2018
Sirota J, Baiser B, Gotelli NJ, Ellison AM (2013) Organic-matter loading determines regime shifts and alternative states in an aquatic ecosystem. P Natl Acad Sci USA 110:7742–7747. https://doi.org/10.1073/pnas.1221037110
terHorst CP (2010) Evolution in response to direct and indirect ecological effects in pitcher plant inquiline communities. Am Nat 176:675–685. https://doi.org/10.1086/657047
Terhorst CP, Miller TE, Levitan DR (2010) Evolution of prey in ecological time reduces the effect size of predators in experimental microcosms. Ecology 91:629–636
Verspoor JJ, Braun DC, Stubbs MM, Reynolds JD (2011) Persistent ecological effects of a salmon-derived nutrient pulse on stream invertebrate communities. Ecosphere 2:1–17. https://doi.org/10.1890/es10-00011.1
Wolff JO (1996) Population fluctuations of mast-eating rodents are correlated with production of acorns. J Mammal 77:850. https://doi.org/10.2307/1382690
Yang LH (2006) Interactions between a detrital resource pulse and a detritivore community. Oecologia 147:522–532. https://doi.org/10.1007/s00442-005-0276-0
Yang LH, Bastow JL, Spence KO, Wright AN (2008) What can we learn from resource pulses. Ecology 89:621–634
Yang LH, Edwards KF, Byrnes JE et al (2010) A meta-analysis of resource pulse–consumer interactions. Ecol Monogr 80:125–151. https://doi.org/10.1890/08-1996.1
Yee DA, Juliano SA (2012) Concurrent effects of resource pulse amount, type, and frequency on community and population properties of consumers in detritus-based systems. Oecologia 169:511–522. https://doi.org/10.1007/s00442-011-2209-4
The authors thank Casey terHorst, Abigail Pastore, and Jessie Mutz for comments as well as the very useful suggestions of the anonymous reviewers.
This work was partially funded by grants from the National Science Foundation (DEB 0519170 and DEB 1456425 to TEM).
Conflict of interest
The authors declare that they have no conflicts of interest.
Communicated by Bryan Brown.
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Miller, T.E., Buhler, M.L. & Cuellar-Gempeler, C. Species-specific differences determine responses to a resource pulse and predation. Oecologia 190, 169–178 (2019). https://doi.org/10.1007/s00442-019-04393-1
- Resource control
- Consumer effects
- Pitcher plants