A pulse-perturbation experiment, designed to assess the impact of top predators, resource availability, and the interaction between predators and resources, was conducted in the inquiline community found in a natural population of the pitcher plant Sarracenia purpurea. Experimental manipulations of pitchers were removal of the top predator (the filter-feeding larvae of the mosquito Wyeomia smithii), addition of resources (mealworms), and the combination of the two. Pitchers were then censused every three days for 15 days. Top-predator removal had little effect on the remaining community, in part because mosquitoes rapidly recolonized the pitchers. Resource addition resulted in large, persistent increases in both bacterial and protozoan abundances but had no effect on rotifers and mites. Therefore, “top-down” effects were relatively weak. In contrast “bottom-up” effects were strong at the lowest trophic level (bacteria) but differentially affected species at a higher trophic level that feed on bacteria. The interactions between top-down and bottom-up forces were difficult to quantify because of the rapid recolonization by mosquitoes.
Addicott, J. F. 1974. Predation and prey community structure: an experimental study of the effect of mosquito larvae on the protozoan communities of pitcher plants. Ecology 55:475-492.
'Predation and prey community structure: an experimental study of the effect of mosquito larvae on the protozoan communities of pitcher plants ' () 55 Ecology : 475 -492 .
Bateman, L. E. 1987. A bdelloid rotifer living as an inquiline in leaves of the pitcher plant, Sarracenia purpurea. Hydrobiologia 147:129-133.
'A bdelloid rotifer living as an inquiline in leaves of the pitcher plant ' () 147 Sarracenia purpurea. Hydrobiologia : 129 -133 .
Bledzki, L. A and A. M. Ellison. 1998. Population growth and production of Habrotrocha rosa Donner (Rotifera: Bdelloidea) and its contribution to the nutrient supply of its host, the northern pitcher plant, Sarracenia purpurea L. (Sarraceniaceae). Hydrobiologia 385:193-200.
'Population growth and production of Habrotrocha rosa Donner (Rotifera: Bdelloidea) and its contribution to the nutrient supply of its host, the northern pitcher plant, Sarracenia purpurea L. (Sarraceniaceae) ' () 385 Hydrobiologia : 193 -200 .
Bradshaw, W. E. and R. A. Creelman. 1984. Mutualism between the carnivorous purple pitcher plant and its inhabitants. Am. Midl Nat. 11:294-303.
'Mutualism between the carnivorous purple pitcher plant and its inhabitants ' () 11 Am. Midl Nat. : 294 -303 .
Bradshaw, W. E. and C. M. Holzapfel. 1986. Geography of density-dependent selection in pitcher-plant mosquitoes. In: F. Taylor and R. Karban (ed.), The Evolution of Insect Life Cycles. Springer-Verlag, New York. pp. 48-65.
Geography of density-dependent selection in pitcher-plant mosquitoes , () 48 -65 .
Bradshaw, W. E. and C. M. Holzapfel. 1989. Life-historical consequences of density-dependent selection in the pitcher-plant mosquito, Wyeomyia smithii. Am. Nat. 133:869-887.
'Life-historical consequences of density-dependent selection in the pitcher-plant mosquito ' () 133 Wyeomyia smithii. Am. Nat. : 869 -887 .
Brown, J. H. 1981. Two decades of homage to Santa Rosalia: toward a general theory of diversity. Am. Zool 21:887-888.
'Two decades of homage to Santa Rosalia: toward a general theory of diversity ' () 21 Am. Zool : 887 -888 .
Carpenter, S. R., J. F. Kitchell and J. R. Hodgson. 1985. Cascading trophic interactions and lake productivity. BioScience 35:634-639.
'Cascading trophic interactions and lake productivity ' () 35 BioScience : 634 -639 .
Cochran-Stafira, D. L. and C. N. von Ende. 1998. Integrating bacteria into food webs: studies with Sarracenia purpurea inquilines. Ecology 79:880-898.
'Integrating bacteria into food webs: studies with Sarracenia purpurea inquilines ' () 79 Ecology : 880 -898 .
Cresswell, J. E. 1991. Capture rates and composition of insect prey of the pitcher plant Sarracenia purpurea. Am. Midl Nat. 125:1-9.
'Capture rates and composition of insect prey of the pitcher plant ' () 125 Sarracenia purpurea. Am. Midl Nat. : 1 -9 .
Cresswell, J. E. 1993. The morphological correlates of prey capture and resource parasitism in pitchers of the carnivorous plant Sarracenia purpurea. Am. Midl Nat. 129:35-41.
'The morphological correlates of prey capture and resource parasitism in pitchers of the carnivorous plant ' () 129 Sarracenia purpurea. Am. Midl Nat. : 35 -41 .
Belovsky, G. E. and A. Joern. 1995. Regulation of rangeland grasshoppers: differing dominant mechanisms in space and time. In: N. Cappuccino and P. W. Price (eds.), Population Dynamics: New Approaches and Synthesis. Academic Press, San Diego, pp. 359-386
Regulation of rangeland grasshoppers: differing dominant mechanisms in space and time , () 359 -386 .
Bender, E. A., T. J. Case and M. E. Gilpin. 1984. Perturbation experiments in community ecology: theory and practice. Ecology 65:1-13.
'Perturbation experiments in community ecology: theory and practice ' () 65 Ecology : 1 -13 .
Bentley, M. D, and J. F. Day. 1989. Chemical ecology and behavioral aspects of mosquito oviposition. Annu. Rev. Entomol 34:401-421.
'Chemical ecology and behavioral aspects of mosquito oviposition ' () 34 Annu. Rev. Entomol : 401 -421 .
Farkas, M. J. and R. A. Brust. 1985. The effect of a larval diet supplement on development in the mosquito Wyeomyia smithii (Coq.) under field conditions. Can. J. Zool. 63:2110-2113.
'The effect of a larval diet supplement on development in the mosquito Wyeomyia smithii (Coq.) under field conditions ' () 63 Can. J. Zool : 2110 -2113 .
Fashing, N. J, and B. M. O'Connor. 1984. Sarraceniopus-a new genus for histiostomatid mites inhabiting the pitchers of Sarraceniaceae (Astigmata: Histiostomatidae). International Journal of Acarology 101:217-227.
'Sarraceniopus-a new genus for histiostomatid mites inhabiting the pitchers of Sarraceniaceae (Astigmata: Histiostomatidae) ' () 101 International Journal of Acarology : 217 -227 .
Fish, D. and D. W. Hall. 1978. Succession and stratification of aquatic insects inhabiting the leaves of the insectivorous pitcher plant, Sarracenia purpurea. Am. Midl Nat. 99:172-183.
'Succession and stratification of aquatic insects inhabiting the leaves of the insectivorous pitcher plant ' () 99 Sarracenia purpurea. Am. Midl Nat. : 172 -183 .
Fraser, L. H. 1998. Top-down vs. bottom-up control influenced by productivity in a North Derbyshire dale. Oikos 81:99-108.
'Top-down vs. bottom-up control influenced by productivity in a North Derbyshire dale ' () 81 Oikos : 99 -108 .
Fraser, L. H. and J. P. Grime. 1998. Top-down control and its effect on the biomass and composition of three grasses at high and low soil fertility in outdoor microcosms. Oecologia 113:239-246.
'Top-down control and its effect on the biomass and composition of three grasses at high and low soil fertility in outdoor microcosms ' () 113 Oecologia : 239 -246 .
Giberson, D., and M. L. Hardwick. 1999. Pitcher plants (Sarracenia purpurea) in eastern Canadian peatlands. In: D. Batzer, R. Rader and S. Wissinger (eds.), Invertebrates in Freshwater Wetlands of North America: Ecology and Management. Wiley, New York, pp. 401-422.
Pitcher plants (Sarracenia purpurea) in eastern Canadian peatlands , () 401 -422 .
Gotelli, N. J. and G. T. L. Entsminger. 2001. Ecosim: Null Models Software for Ecology. Version 7.0. Acquired Intelligence, Inc., and Kesey-Bear. http://homepages.together.net/~gentsmin/ecosim.htm.
Hairston, N. G., F. E. Smith and L. B. Slobodkin. 1960. Community structure, population control, and competition. Am. Nat. 94:421-425.
'Community structure, population control, and competition ' () 94 Am. Nat. : 421 -425 .
Harvey, E. and T. E. Miller. 1996. Variance in composition of inquiline communities in leaves of Sarracenia purpurea L. on multiple spatial scales. Oecologia 108:562-566.
'Variance in composition of inquiline communities in leaves of Sarracenia purpurea L. on multiple spatial scales ' () 108 Oecologia : 562 -566 .
Heard, S. B. 1994. Pitcher plant midges and mosquitoes: a processing chain commensalism. Ecology 75:1647-1660.
'Pitcher plant midges and mosquitoes: a processing chain commensalism ' () 75 Ecology : 1647 -1660 .
Heard, S. B. 1995. Imperfect oviposition decisions by the pitcher plant mosquito (Wyeomyia smithii). Evol Ecol 8:493-502.
'Imperfect oviposition decisions by the pitcher plant mosquito (Wyeomyia smithii) ' () 8 Evol Ecol. : 493 -502 .
Huston, M. A. 1994. Biological Diversity. Cambridge Univ. Press, New York.
Biological Diversity , ().
Kneitel, J. M. and T. E. Miller. 2002. The effects of resource and top-predator addition to the inquiline community of the pitcher plant Sarracenia purpurea. Ecology 83:680-688.
'The effects of resource and top-predator addition to the inquiline community of the pitcher plant ' () 83 Sarracenia purpurea. Ecology : 680 -688 .
Kurmayer, R. and J. Wanzenboeck. 1996. Top-down effects of underyearling fish on a phytoplankton community. Freshwater Biology 36:599-609.
'Top-down effects of underyearling fish on a phytoplankton community ' () 36 Freshwater Biology : 599 -609 .
Lindeman, R. L. 1942. The trophic-dynamic aspect of ecology. Ecology 23:399-418.
'The trophic-dynamic aspect of ecology ' () 23 Ecology : 399 -418 .
Menge, B. A. 1995. Indirect effects in marine rocky intertidal interaction webs: patterns and importance. Ecol. Monogr. 65:21-74.
'Indirect effects in marine rocky intertidal interaction webs: patterns and importance ' () 65 Ecol. Monogr : 21 -74 .
Miller, T., D. Cassill, C. Johnson, C. Kindell, J. Leips, D. McInnes, T. Bevis, D. Mehlman and B. Richard. 1994. Intraspecific and interspecific competition of Wyeomyia smithii (Coq.) (Culicidae) in pitcher plant communities. Am. Midl Nat. 131:136-145.
'Intraspecific and interspecific competition of Wyeomyia smithii (Coq.) (Culicidae) in pitcher plant communities ' () 131 Am. Midl Nat. : 136 -145 .
Miller, T. E., J. M. Kneitel and J. Burns. 2002. Effects of community structure on invasion success and rate. Ecology 83:898-905
'Effects of community structure on invasion success and rate ' () 83 Ecology : 898 -905 .
Petersen, R. L., L. Hanley, E. Walsh, H. Hunt and R. M. Duffield. 1997. Occurrence of the rotifer, Habrotocha cf. rosa Donner, in the purple pitcher plant, Sarracenia purpurea L., (Sarraceniaceae) along the eastern seaboard of North America. Hydrobiologia 354:63-66.
'Occurrence of the rotifer, Habrotocha cf. rosa Donner, in the purple pitcher plant, Sarracenia purpurea L., (Sarraceniaceae) along the eastern seaboard of North America ' () 354 Hydrobiologia : 63 -66 .
Pimm, S. L. 1984. The complexity and stability of ecosystems. Nature 307:321-326.
'The complexity and stability of ecosystems ' () 307 Nature : 321 -326 .
Powers, M. 1992. Top-down and bottom-up forces in food webs: do plants have primacy? Ecology 73:733-746.
'Top-down and bottom-up forces in food webs: do plants have primacy ' () 73 Ecology : 733 -746 .
Prankevicius, A. B. and D. M. Cameron. 1989. Free-living dinitrogen-fixing bacteria in the leaf of the northern pitcher plant (Sarracenia purpurea L.). Naturaliste Canadien (Quebec) 116:245-249.
'Free-living dinitrogen-fixing bacteria in the leaf of the northern pitcher plant (Sarracenia purpurea L.) ' () 116 Naturaliste Canadien (Quebec) : 245 -249 .
Prankevicius, A. B. and D. M. Cameron. 1991. Bacterial dinitrogen fixation in the leaf of the northern pitcher plant (Sarracenia purpurea). Can. J. Bot. 69:2296-2298.
'Bacterial dinitrogen fixation in the leaf of the northern pitcher plant (Sarracenia purpurea) ' () 69 Can. J. Bot : 2296 -2298 .
Proulx, M. and A. Mazumder. 1998. Reversal of grazing impact on plant species richness in nutrient-poor vs. nutrient-rich ecosystems. Ecology 79:2581-2592.
'Reversal of grazing impact on plant species richness in nutrient-poor vs. nutrient-rich ecosystems ' () 79 Ecology : 2581 -2592 .
Ricklefs, R. E. and D. Schluter. 1993. Species Diversity in Ecological Communities. Univ. Chicago Press, Chicago.
Species Diversity in Ecological Communities , ().
Schmitz, O. J., P. A. Hamback and A. P. Beckerman. 2000. Trophic cascades in terrestrial systems: a review of the effects of carnivore removals on plants. Am. Nat. 155:141-153.
'Trophic cascades in terrestrial systems: a review of the effects of carnivore removals on plants ' () 155 Am. Nat. : 141 -153 .
Simberloff, D. S. 1982. The status of competition theory in ecology. Ann. Zool. Fenn. 19:241-253.
'The status of competition theory in ecology ' () 19 Ann. Zool. Fenn : 241 -253 .
Stiling, P. and A. M. Rossi. 1996. Complex effects of genotype and environment on insect herbivores and their enemies. Ecology 77:2212-2218.
'Complex effects of genotype and environment on insect herbivores and their enemies ' () 77 Ecology : 2212 -2218 .
Stiling, P. and A. M. Rossi. 1997. Experimental manipulations of top-down and bottom-up factors in a tri-trophic system. Ecology 78:1602-1606.
'Experimental manipulations of top-down and bottom-up factors in a tri-trophic system ' () 78 Ecology : 1602 -1606 .
Wallace, J. B., S. L. Eggert, J. L. Meyer and J. R. Webster. 1997. Multiple trophic levels of a forest stream linked to terrestrial litter inputs. Science 277:102-104.
'Multiple trophic levels of a forest stream linked to terrestrial litter inputs ' () 277 Science : 102 -104 .
Wolfe, L. M. 1981. Feeding behavior of a plant: differential prey capture in old and new leaves of the pitcher plant (Sarracenia purpurea). Am. Midl Nat. 352-359.
'Feeding behavior of a plant: differential prey capture in old and new leaves of the pitcher plant (Sarracenia purpurea) ' () Am. Midl Nat. : 352 -359 .
Istock, C. A., S. S. Wassermann and H. Zimmer. 1975. Ecology and evolution of the pitcher-plant mosquito: 1. Population dynamics and laboratory responses to food and population density. Evolution 29:296-312.
'Ecology and evolution of the pitcher-plant mosquito: 1. Population dynamics and laboratory responses to food and population density ' () 29 Evolution : 296 -312 .