Abstract
Meta-analyses are an increasingly used set of statistical tools that allow for data from multiple studies to be drawn together allowing broader, more generalizable conclusions. The extent to which the increase in the number of meta-analyses in ecology, relative to other types of papers, has influenced how questions are asked and the current state of knowledge has not been assessed before. Here, we gauge the impact of meta-analyses in ecology quantitatively and qualitatively. For the quantitative assessment, we conducted an analysis of 240 published meta-analyses to examine trends in ecological meta-analyses. Our examination shows that publication rates of meta-analyses in ecology have increased through time, and that more recent meta-analyses have been more comprehensive, including more studies and a greater temporal range of studies. Meta-analyses in ecology are the result of larger collaborations with meta-analyses being authored by larger teams than other studies, and those funded by collaborative centers have even larger collaborations. These larger collaborations result in a larger scope and scale of the analyses—by using more papers, datasets, species and years of data. Qualitatively, we discuss three examples: the strength of competition, the nature of how biodiversity affects ecosystem function, and the response of species to global climate change, where meta-analyses supplied the critical evaluation of accepted ecological explanations. As scientific criticism and controversy mount, the true power of meta-analyses is to serve as the capstone evidence supporting the validity of an explanation and to possibly herald the shift to other potential explanations.
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References
Aarssen LW (1997) High productivity in grassland ecosystems: effected by species diversity or productive species? Oikos 80:183–184
Arnqvist G, Wooster D (1995) Metaanalysis—synthesizing research findings in ecology and evolution. Trends Ecol Evol 10:236–240
Balvanera P, Pfisterer AB, Buchmann N, He J-S, Nakashizuka T, Raffaelli D, Schmid B (2006) Quantifying the evidence for biodiversity effects on ecosystem functioning and services. Ecol Lett 9:1146–1156
Bell G (2001) Neutral macroecology. Science 293:2143–2148
Broecker WS (1975) Climatic change: are we on the brink of a pronounced global warming? Science 189:460–463
Brown WL Jr, Wilson EO (1956) Character displacement. Syst Zool 5:49–64
Cadotte MW, Cavender-Bares J, Tilman D, Oakley TH (2009) Using phylogenetic, functional and trait diversity to understand patterns of plant community productivity. PLoS One 4:e5695
Cardinale BJ (2011) Biodiversity improves water quality through niche partitioning. Nature 472:86–89
Cardinale BJ, Palmer MA (2002) Disturbance moderates biodiversity-ecosystem function relationships: experimental evidence from caddisflies in stream mesocosms. Ecology 83:1915–1927
Cardinale BJ, Ives AR, Ichausti P (2004) Effects of species diversity on the primary productivity of ecosystems: extending our spatial and temporal scales of inference. Oikos 104:437–450
Cardinale BJ, Srivastava DS, Duffy JE, Wright JP, Downing AL, Sankaran M, Jouseau C (2006) Effects of biodiversity on the functioning of trophic groups and ecosystems. Nature 443:989–992
Carpenter SR, Armbrust EV, Arzberger PW, Chapin FS, Elser JJ, Hackett EJ, Ives AR, Kareiva PM, Leibold MA, Lundberg P, Mangel M, Merchant N, Murdoch WW, Palmer MA, Peters DPC, Pickett STA, Smith KK, Wall DH, Zimmerman AS (2009) Accelerate synthesis in ecology and environmental sciences. Bioscience 59:699–701
Carroll I, Cardinale B, Nisbet R (2011) Niche and fitness differences relate the maintenance of diversity to ecosystem function. Ecology 92:1157–1165
Connell JH (1961) Influence of interspecific competition and other factors on distribution of barnacle chthamalus stellatus. Ecology 42:710
Connell JH (1983) On the prevalence and relative importance of interspecific competition—evidence from field experiments. Am Nat 122:661–696
Connor EF, Simberloff D (1979) The assembly of species communities: chance or competition? Ecology 60:1132–1140
Connor EF, Simberloff D (1983) Interspecific competition and species co-occurrence patterns on islands: null models and the evaluation of evidence. Oikos 41:455–465
Connor EF, Simberloff D (1984) Neutral models of species co-occurrence patterns. In: Strong DR, Simberloff D, Abele LG, Thistle A (eds) Ecological communities: conceptual issues and the evidence. Princeton University Press, Princeton, pp 341–343
Cox PM, Betts RA, Jones CD, Spall SA, Totterdell IJ (2000) Acceleration of global warming due to carbon-cycle feedbacks in a coupled climate model. Nature 408:184–187
Diamond JM (1975) Assembly of species communities. In: Cody ML, Diamond JM (eds) Ecology and evolution of communities. Harvard University Press, Cambridge
Drake BG, GonzalezMeler MA, Long SP (1997) More efficient plants: a consequence of rising atmospheric CO2? Annu Rev Plant Physiol Plant Mol Biol 48:609–639
Flynn DFB, Mirotchnick N, Jain M, Palmer MI, Naeem S (2011) Functional and phylogenetic diversity as predictors of biodiversity-ecosystem function relationships. Ecology 1573–1581
Fox JW, Harpole WS (2008) Revealing how species loss affects ecosystem function: the trait-based price equation partition. Ecology 89:269–279
Franklin JF, Bledsoe CS, Callahan JT (1990) Contributions of the long-term ecological research-program - an expanded network of scientists, sites, and programs can provide crucial comparative analyses. Bioscience 40:509–523
Gause GF (1934) The struggle for existence. Hafner Publishing Company, New York
Gilpin ME, Diamond JM (1984) Are species co-occurrences on islands non-random, and are null hypotheses useful in community ecology? In: Strong DR, Simberloff D, Abele LG, Thistle A (eds) Ecological communities: conceptual issues and the evidence. Princeton University Press, Princeton
Gross CL (2005) A comparison of the sexual systems in the trees from the Australian tropics with other tropical biomes—more monoecy but why? Am J Bot 92:907–919
Gurevitch J, Hedges LV (2001) Meta-analysis: combining the results of independent experiments. In: Scheiner SM, Gurevitch J (eds) Design and analysis of ecological experiments. Oxford University Press, Oxford, pp 347–369
Gurevitch J, Morrow LL, Wallace A, Walsh JS (1992) A metaanalysis of competition in field experiments. Am Nat 140:539–572
Gurevitch J, Morrison JA, Hedges LV (2000) The interaction between competition and predation: a meta-analysis of field experiments. Am Nat 155:435–453
Gurevitch J, Curtis PS, Jones MH (2001) Meta-analysis in ecology. Adv Ecol Res 32(32):199–247
Hackett E, Parker J (2010) Leadership in scientific research groups. In: 4S Annual meeting, University of Tokyo, Tokyo
Hampton SE, Parker JN (2011) Success in synthesis. Bioscience 61:900–910
Hector A, Bagchi R (2007) Biodiversity and ecosystem multifunctionality. Nature 448:188–190
Hector A, Schmid B, Beierkuhnlein C, Caldeira MC, Diemer M, Dimitrakopoulos PG, Finn JA, Freitas H, Giller PS, Good J, Harris R, Hogberg P, Huss-Danell K, Joshi J, Jumpponen A, Korner C, Leadley PW, Loreau M, Minns A, Mulder CPH, O’Donovan G, Otway SJ, Pereira JS, Prinz A, Read DJ, Scherer-Lorenzen M, Schulze ED, Siamantziouras ASD, Spehn EM, Terry AC, Troumbis AY, Woodward FI, Yachi S, Lawton JH (1999) Plant diversity and productivity experiments in European grasslands. Science 286:1123–1127
Hedges LV, Gurevitch J, Curtis PS (1999) The meta-analysis of response ratios in experimental ecology. Ecology 80:1150–1156
Holt RD (1977) Predation, apparent competition, and structure of prey communities. Theor Popul Biol 12:197–229
Hooper DU, Chapin FS, Ewel JJ, Hector A, Inchausti P, Lavorel S, Lawton JH, Lodge DM, Loreau M, Naeem S, Schmid B, Setala H, Symstad AJ, Vandermeer J, Wardle DA (2005) Effects of biodiversity on ecosystem functioning: a consensus of current knowledge. Ecol Monogr 75:3–35
Houghton JT, Ding Y, Gribbs DJ, Noguer M, van der Linden PJ, Dai X, Maskell K, Johnson CA (2001) Climate change 2001: the scientific basis. Cambridge University Press, Cambridge
Hubbell SP (2001) The unified neutral theory of biodiversity and biogeography, vol 32. Princeton University Press, Princeton
Huston M (1997) Hidden treatments in ecological experiments: re-evaluating the ecosystem function of biodiversity. Oecologia 110:449–460
Huston M, Aarssen LW, Austin MP, Cade BS, Fridley JD, Garnier E, Grime JP, Hodgson JG, Lauenroth WK, Thompson K, Vandermeer J, Wardle DA (2000) No consistent effect of plant diversity on productivity. Science 289:1255
Hutchinson GE (1967) A treatise on limnology, vol 2. Wiley, New York
Jones MB, Schildhauer MP, Reichman OJ, Bowers S (2006) The new bioinformatics: integrating ecological data from the gene to the biosphere. Annu Rev Ecol Evol Syst 37:519–544
Karst J, Marczak L, Jones MD, Turkington R (2008) The mutualism-parasitism continuum in ectomycorrhizas: a quantitative assessment using meta-analysis. Ecology 89:1032–1042
Lakatos I (1976) Proofs and Refutations. Cambridge University Press, Cambridge
Lawton JH (1999) Are there general laws in ecology? Oikos 84:177–192
Leibold MA, Holyoak M, Mouquet N, Amarasekare P, Chase JM, Hoopes MF, Holt RD, Shurin JD, Law R, Tilman D, Loreau M, Gonzalez A (2004) The metacommunity concept: a framework for multi-scale community ecology. Ecol Lett 7:601–613
Levin SA (1992) The problem of pattern and scale in ecology. Ecology 73:1943–1967
Lindenmayer DB, Likens GE (2011) Losing the culture of ecology. Bull Ecol Soc Am 92:245–246
Loreau M (2000) Biodiversity and ecosystem functioning: recent theoretical advances. Oikos 91:3–17
Loreau M (2010) From populations to ecosystems: theoretical foundations for a new ecological synthesis. Princeton University Press, Princeton
Loreau M, Hector A (2001) Partitioning selection and complementarity in biodiversity experiments. Nature 412:72–76
Lotka AJ (1925) Elements of physical biology. Williams and Wilkins, Baltimore MD
Massol F, Gravel D, Mouquet N, Cadotte MW, Fukami T, Leibold MA (2011) Linking community and ecosystem dynamics through spatial ecology. Ecol Lett 14:313–323
McCarthy JJ, Canziani OF, Leary NA, Dokken DJ, White KS (2001) Climate change 2001: impacts, adaptation and vulnerability. Cambridge University Press, Cambridge
McGill BJ (2006) A renaissance in the study of abundance. Science 314:770–772
Menge BA, Chan F, Dudas S, Eerkes-Medrano D, Grorud-Colvert K, Heiman K, Hessing-Lewis M, Iles A, Milston-Clements R, Noble M, Page-Albins K, Richmond E, Rilov G, Rose J, Tyburczy J, Vinueza L, Zarnetske P (2009) Do terrestrial ecologists ignore aquatic literature? Front Ecol Environ 7:82–83
Micheli F, Halpern BS (2005) Low functional redundancy in coastal marine assemblages. Ecol Lett 8:391–400
Michener WK (2006) Meta-information concepts for ecological data management. Ecol Inform 1:3–7
Murtaugh PA (2002) Journal quality, effect size, and publication bias in meta-analyses. Ecology 83:1162–1166
Naeem S, Li SB (1997) Biodiversity enhances ecosystem reliability. Nature 390:507–509
Naeem S, Thompson LJ, Lawler SP, Lawton JH, Woodfin RM (1994) Declining biodiversity can alter the performance of ecosystems. Nature 368:734–737
Olkin I (1996) Meta-analysis: current issues in research synthesis. Stat Med 15:1253–1257
Osenberg CW, Sarnelle O, Cooper SD, Holt RD (1999) Resolving ecological questions through meta-analysis: goals, metrics, and models. Ecology 80:1105–1117
Paine RT (1966) Food web complexity and species diversity. Am Nat 100:65
Parmesan C (2006) Ecological and evolutionary responses to recent climate change. In: Annual review of ecology evolution and systematics, vol 37. Annual reviews, Palo Alto, pp 637–669
Peter H, Ylla I, Gudasz C, Romani AM, Sabater S, Tranvik LJ (2011) Multifunctionality and diversity in bacterial biofilms. PLoS One 6:8
Peters RH (1991) A critique for ecology. Cambridge University Press, Cambridge
Popper K (1963) Conjectures and refutations: the growth of scientific knowledge. Routledge, New York
R Development Core Team (2009) R: a language and environment for statistical computing. R foundation for statistical computing. ISBN 3-900051-07-0, URL: http://www.R-project.org. In, Vienna, Austria
Root TL, Price JT, Hall KR, Schneider SH, Rosenzweig C, Pounds JA (2003) Fingerprints of global warming on wild animals and plants. Nature 421:57–60
Ross HH (1957) Principles of natural coexistence indicated by leafhopper populations. Evolution 11:113–129
Sala OE, Chapin FS, Armesto JJ, Berlow E, Bloomfield J, Dirzo R, Huber-Sanwald E, Huenneke LF, Jackson RB, Kinzig A, Leemans R, Lodge DM, Mooney HA, Oesterheld M, Poff NL, Sykes MT, Walker BH, Walker M, Wall DH (2000) Biodiversity—global biodiversity scenarios for the year 2100. Science 287:1770–1774
Schoener TW (1982) The controversy over interspecific competition. Am Sci 70:586–595
Schoener TW (1983) Field experiments on interspecific competition. Am Nat 122:240–285
Simberloff D (2006) Rejoinder to: don’t calculate effect sizes; study ecological effects. Ecol Lett 9:921–922
Spehn EM, Hector A, Joshi J, Scherer-Lorenzen M, Schmid B, Bazeley-White E, Beierkuhnlein C, Caldeira MC, Diemer M, Dimitrakopoulos PG, Finn JA, Freitas H, Giller PS, Good J, Harris R, Hogberg P, Huss-Danell K, Jumpponen A, Koricheva J, Leadley PW, Loreau M, Minns A, Mulder CPH, O’Donovan G, Otway SJ, Palmborg C, Pereira JS, Pfisterer AB, Prinz A, Read DJ, Schulze ED, Siamantziouras ASD, Terry AC, Troumbis AY, Woodward FI, Yachi S, Lawton JH (2005) Ecosystem effects of biodiversity manipulations in European grasslands. Ecol Monogr 75:37–63
Suding KN, Collins SL, Gough L, Clark C, Cleland EE, Gross KL, Milchunas DG, Pennings S (2005) Functional- and abundance-based mechanisms explain diversity loss due to N fertilization. Proc Nat Acad Sci USA 102:4387–4392
Tilman D, Knops J, Wedin D, Reich P, Ritchie M, Siemann E (1997) The influence of functional diversity and composition on ecosystem processes. Science 277:1300–1302
Tilman D, Reich PB, Knops J, Wedin D, Mielke T, Lehman C (2001) Diversity and productivity in a long-term grassland experiment. Science 294:843–845
Tucker CM, Cadotte MW (2011) The empirical divide (http://evol-eco.blogspot.ca/2011/07/empirical-divide.html). In: The EEB and Flow vol 2011
Udvardy MFD (1959) Notes on the ecological concepts of habitat, biotope and niche. Ecology 40:725–728
United Nations Environment Programme (1995) Global biodiversity assessment. Cambridge University Press, Cambridge
Volterra V (1931) Variations and fluctuations of the number of individuals in animal species living together. In: Chapman RN (ed) Animal ecology. McGraw-Hill, New York
Wardle DA (1999) Is ‘‘sampling effect’’ a problem for experiments investigating biodiversity–ecosystem function relationships? Oikos 87:403–407
Zavaleta ES, Pasari JR, Hulvey KB, Tilman GD (2010) Sustaining multiple ecosystem functions in grassland communities requires higher biodiversity. Proc Nat Acad Sci USA 107:1443–1446
Acknowledgments
We wish to thank the editors of this special issue for their invitation and to two anonymous reviewers for helping to greatly improve this paper. Funding for this work was generously provided by the National Center for Ecological Analysis and Synthesis, a Center funded by NSF (Grant #DEB-0553768), the University of California, Santa Barbara, and the State of California and an NSERC grant (386151) to MWC.
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Cadotte, M.W., Mehrkens, L.R. & Menge, D.N.L. Gauging the impact of meta-analysis on ecology. Evol Ecol 26, 1153–1167 (2012). https://doi.org/10.1007/s10682-012-9585-z
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DOI: https://doi.org/10.1007/s10682-012-9585-z