Abstract
Rock outcrops in the boreal forest of Québec can show either of two different states: a forested state with >25% tree cover, and an unforested state (<25% tree cover). We tested three different hypotheses that might explain the co-occurrence of forested and unforested rock outcrops: (1) differences in bedrock geology, with unforested outcrops associated to bedrock types inimical to tree growth; (2) unforested outcrops as recently disturbed sites undergoing secondary succession towards a forested state; (3) unforested outcrops as an alternative stable state to forested outcrops, induced by post-fire regeneration failure. Digitized forest inventory maps were used along with bedrock geology maps and time-since-fire maps to compare forested and unforested outcrops for bedrock geology type and date of the last fire. Field surveys were conducted on 28 outcrops (14 forested, 14 unforested) to gather information regarding tree species composition and site characteristics (thickness of the organic matter layer, percent cover of lichens, mosses and ericaceous shrubs). None of the three hypotheses explain the co-occurrence of forested and unforested rock outcrops in the boreal forest of Québec. Both outcrop types occur on the same bedrock geology types. Unforested outcrops are not recently disturbed sites in early-successional states, as no clear distinction could be made in tree species composition and date of the last fire between the two outcrop types. Forested and unforested outcrops are not alternative stable states, as unforested outcrops are unstable and cannot maintain themselves through time in the prolonged absence of fire. Hence, unforested rock outcrops could be viewed as degraded, diverging post-fire types maintained by the late Holocene disturbance regime, characterized by high fire frequencies.
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References
D. Arseneault S. Payette (1992) ArticleTitleA post-fire shift from lichen-spruce to lichen-tundra vegetation at tree line Ecology 73 1067–1081
H. Asselin S. Payette (2005) ArticleTitleLate Holocene opening of the forest tundra landscape in northern Québec, Canada Global Ecol. Biogeogr. 14 307–313 Occurrence Handle10.1111/j.1466-822X.2005.00157.x
H. Asselin M.-J. Fortin Y. Bergeron (2001) ArticleTitleSpatial distribution of late-successional coniferous species regeneration following disturbance in southwestern Québec boreal forest For. Ecol. Manage. 140 29–37 Occurrence Handle10.1016/S0378-1127(00)00273-5
M. Asselin (1995) L’Abitibi-Témiscamingue: trois sous-régions, une région O. Vincent (Eds) Histoire de l’Abitibi-Témiscamingue Collection Les régions du Québec, No. 7, Institut québécois de recherche sur la culture Québec, Canada 21–65
M.G. Barbour J.H. Burk W.D. Pitts (1987) Terrestrial plant ecology EditionNumbersecond The Benjamin/Cummings Publishing Company, Inc Menlo Park
Y. Bergeron (1998) ArticleTitleLes conséquences des changements climatiques sur la fréquence des feux et la composition forestière au sud-ouest de la forêt boréale québécoise Géogr. phys. Quatern. 52 1–7
Y. Bergeron S. Archambault (1993) ArticleTitleDecreasing frequency of forest fires in the southern boreal zone of Québec and its relation to global warming since the end of the “Little Ice Age” Holocene 3 255–259
Y. Bergeron M. Dubuc (1989) ArticleTitleSuccession in the southern part of the Canadian boreal forest Vegetatio 79 51–63
Y. Bergeron C. Camiré A. Bouchard P. Ganglof (1982) ArticleTitleAnalyse et classification des sols pour une étude écologique intégrée d’un secteur de l’AbitibiQuébec Géogr. phys. Quatern. 36 291–305
Bergeron Y., Richard P.J.H., Carcaillet C., Gauthier S., Flannigan M. and Prairie Y.T. 1998. Variability in fire frequency and forest composition in Canada’s southeastern boreal forest: A challenge for sustainable http://www.consecol.org/vol2/iss2/art6 management. Cons. Ecol. [online] 2:.
Y. Bergeron S. Gauthier V. Kafka P. Lefort D. Lesieur (2001) ArticleTitleNatural fire frequency for the eastern Canadian boreal forest: consequences for sustainable forestry Can. J. For. Res. 31 384–391 Occurrence Handle10.1139/cjfr-31-3-384
Y. Bergeron M. Flannigan S. Gauthier A. Leduc P. Lefort (2004a) ArticleTitlePastcurrent and future fire frequency in the Canadian boreal forest: implications for sustainable forest management Ambio 33 356–360
Y. Bergeron S. Gauthier M. Flannigan V. Kafka (2004b) ArticleTitleFire regimes at the transition between mixedwood and coniferous boreal forest in northwestern Quebec Ecology 85 1916–1932
R.T. Brown P. Mikola (1974) ArticleTitleThe influence of fruticose soil lichens upon the mycorrhizae and seedling growth of forest trees Acta Forest. Fen. 141 1–23
M.P. Burbanck R.B. Platt (1964) ArticleTitleGranite outcrop communities of the Piedmont Plateau in Georgia Ecology 45 292–306
M.P. Burbanck D.L. Phillips (1983) ArticleTitleEvidence of plant succession on granite outcrops of the Georgia Piedmont Am. Midl. Nat. 109 94–104
C. Carcaillet Y. Bergeron P.J.H. Richard B. Fréchette S. Gauthier Y.T. Prairie (2001) ArticleTitleChange of fire frequency in the eastern Canadian boreal forests during the Holocene: does vegetation composition or climate trigger the fire regime? J. Ecol. 89 930–946
P.J. Catellino I.R. Noble R.O. Slatyer S.R. Kessell (1979) ArticleTitlePredicting the multiple pathways of plant succession Environ. Manage. 3 41–50
F.S. Chapin T.V. Callaghan Y. Bergeron M. Fukuda J.F. Johnstone G. Juday S.A. Zimov (2004) ArticleTitleGlobal change and the boreal forest: Thresholds, shifting states or gradual change? Ambio 33 361–365 Occurrence Handle15387075
S. Clayden A. Bouchard (1983) ArticleTitleStructure and dynamics of conifer-lichen stands on rock outcrops south of Lake AbitibiQuebec Can. J. Bot. 61 850–871
F.E. Clements (1916) Plant succession: an analysis of the development of vegetation Carnegie Institution of Washington Washington
F.E. Clements (1936) ArticleTitleNature and structure of the climax J. Ecol. 5 252–284
J.H. Connell W.P. Sousa (1983) ArticleTitleOn the evidence needed to judge ecological stability or persistence Am. Nat. 121 789–824 Occurrence Handle10.1086/284105
S. Cowles (1982) ArticleTitlePreliminary results investigating the effect of lichen ground cover on the growth of black spruce Nat. Can. 109 573–581
Environment Canada 2005. Canadian climate normals or averages 1971–2000. [WWW document]. URL http://www.climate.weatheroffice.ec.gc.ca/climate_normals
C.L. Fastie (1995) ArticleTitleCauses and ecosystem consequences of multiple pathways of primary succession at Glacier Bay, Alaska Ecology 76 1899–1916
Frelich L.E. and Reich P.B. 1998. Disturbance severity and threshold responses in the boreal forest. Conserv. Ecol. [online] 2: http://www.consecol.org/vol2/iss2/art7.
K. Gajewski S. Payette J.C. Ritchie (1993) ArticleTitleHolocene vegetation history at the boreal-forest–shrub-tundra transition in north-western Québec J. Ecol. 81 433–443
L. Gaudreau (1979) La végétation et les sols des collines Tanginan Abitibi-Ouest, Québec Études écologiques No. 1, Laboratoire d’écologie forestière, Université Laval Québec
D.G. Green (1982) ArticleTitleFire and stability in the postglacial forests of southwest Nova Scotia J. Biogeogr. 9 29–40
P. Grondin (1996) Cadre bioclimatique de référence J.A. Bérard M. Côté (Eds) Manuel de foresterie Les Presses de l’Université Laval Québec 148–159
M.L. Heinselman (1981) Fire and succession in the conifer forests of northern North America D.C. West H.H. Shugart D.B. Botkin (Eds) Forest Succession: Concepts and Application Springer-Verlag New York 374–406
R.J. Hobbs (1994) ArticleTitleDynamics of vegetation mosaics: Can we predict responses to global change? Écoscience 1 346–356
M. Hocq P. Verpaelst (1994) Les sous-provinces de l’Abitibi et du Pontiac C. Dubé (Eds) Géologie du Québec Les Publications du Québec MM 94–01 21–37
G. Houle L. Filion (2003) ArticleTitleThe effects of lichens on white spruce seedling establishment and juvenile growth in a spruce-lichen woodland of subarctic Québec Écoscience 10 80–84
G. Houle D.L. Phillips (1989) ArticleTitleSeed availability and biotic interactions in granite outcrop plant communities Ecology 70 1307–1316
J.P.P. Jasinski H. Asselin (2004) ArticleTitleAlternative view on alternative stable states Front. Ecol. Environ. 2 10–11
Jasinski J.P.P. and Payette S. 2005. The creation of alternative stable states (spruce lichen woodland vs. spruce moss forest) by compounded disturbances in the southeasetrn boreal forest, Québec, Canada. Ecol. Monogr. (in press).
C. Keever H.J. Oosting L.E. Anderson (1951) ArticleTitlePlant succession on exposed granite of Rocky Face Mountain, Alexander county, North Carolina Bull. Torrey Bot. Club 78 401–421
K.A. Kershaw (1977) ArticleTitleStudies on lichen-dominated ecosystems. XX. An examination of some aspects of the northern boreal lichen woodlands in Canada Can. J. Bot. 55 393–410
A.R. Kruckeberg (2002) Geology and plant life. The effects of landforms and rock types on plants University of Washington Press Washington
I. Larocque Y. Bergeron I.D. Campbell R.H.W. Bradshaw (2003) ArticleTitleFire-induced decrease in forest cover on a small rock outcrop in the Abitibi region of Québec, Canada Écoscience 10 515–524
J. Lilienfein R.G. Qualls S.M. Uselman S.D. Bridgham (2003) ArticleTitleSoil formation and organic matter accretion in a young andesitic chronosequence at Mt. Shasta, California Geoderma 116 249–264 Occurrence Handle10.1016/S0016-7061(03)00086-7 Occurrence Handle1:CAS:528:DC%2BD3sXmsVGisbs%3D
E.A. Lynch (1998) ArticleTitleOrigin of a park-forest vegetation mosaic in the Wind River RangeWyoming Ecology 79 1320–1338
A.U. Mallik (2003) ArticleTitleConifer regeneration problems in boreal and temperate forests with ericaceous understory: role of disturbance, seedbed limitation, and keystone species change Crit. Rev. Plant Sci. 22 341–366
D.H. Mann L.J. Plug (1999) ArticleTitleVegetation and soil development at un upland taiga siteAlaska Écoscience 6 272–285
R. McVaugh (1943) ArticleTitleThe vegetation of the granitic flatrocks of the southeastern U.S Ecol. Monogr. 13 119–165
D. Mueller-Dombois H. Ellenberg (1974) Aims and Methods of Vegetation Ecology John Wiley & Sons New York
S.D. Muller P.J.H. Richard (2001) ArticleTitlePost-glacial vegetation migration in conterminous Montreal lowlands, southern Quebec J. Biogeogr. 28 1169–1193 Occurrence Handle10.1046/j.1365-2699.2001.00625.x
H.J. Oosting L.E. Anderson (1937) ArticleTitleThe vegetation of a barefaced cliff in western North Carolina Ecology 18 280–292
H.J. Oosting L.E. Anderson (1939) ArticleTitlePlant succession on granite rock in eastern North Carolina Bot. Gaz. 100 750–768 Occurrence Handle10.1086/334828
R.T. Paine M.J. Tegner E.A. Johnson (1998) ArticleTitleCompounded perturbations yield ecological surprises Ecosystems 1 535–545 Occurrence Handle10.1007/s100219900049
S. Payette (1992) Fire as a controlling process in the North American boreal forest H.H. Shugart R. Leemans G.B. Bonan (Eds) A Systems Analysis of the Global Boreal Forest Cambridge University Press Cambridge 144–169
S. Payette R. Gagnon (1985) ArticleTitleLate Holocene deforestation and tree regeneration in the forest-tundra of Québec Nature 313 570–572 Occurrence Handle10.1038/313570a0
S. Payette N. Bhiry A. Delwaide M. Simard (2000) ArticleTitleOrigin of the lichen woodland at its southern range limit in eastern Canada: the catastrophic impact of insect defoliators and fire on the spruce-moss forest Can. J. For. Res. 30 288–305 Occurrence Handle10.1139/cjfr-30-2-288
D.L. Phillips (1981) ArticleTitleSuccession in granite outcrop shrub-tree communities Am. Midl. Nat. 106 313–317
D.L. Phillips (1982) ArticleTitleLife-forms of granite outcrop plants Am. Midl. Nat. 107 206–208
J.S. Rowe G.W. Scotter (1973) ArticleTitleFire in the boreal forest Quaternary Res. 3 444–464 Occurrence Handle10.1016/0033-5894(73)90008-2
J.-P. Saucier J.-F. Bergeron P. Grondin A. Robitaille (1998) ArticleTitleLes régions écologiques du Québec méridional Troisième version L’Aubelle 124 S1–S12
E.G. Sedia J.G. Ehrenfeld (2003) ArticleTitleLichens and mosses promote alternate stable plant communities in the New Jersey Pinelands Oikos 100 447–458 Occurrence Handle10.1034/j.1600-0706.2003.12058.x
D.J. Shure H.L. Ragsdale (1977) ArticleTitlePatterns of primary succession on granite outcrop surfaces Ecology 58 993–1006
M.-J. Simard Y. Bergeron L. Sirois (2003) ArticleTitleSubstrate and litterfall effects on conifer seedling survivorship in southern boreal stands of Canada Can. J. For. Res. 33 672–681
L. Sirois (1993) ArticleTitleImpact of fire on Picea mariana Pinus banksiana seedlings in subarctic lichen woodlands J. Veg. Sci. 4 795–802
L. Sirois S. Payette (1991) ArticleTitleReduced postfire tree regeneration along a boreal forest–forest-tundra transect in northern Québec Ecology 72 619–627
A.F. Skutch (1929) ArticleTitleEarly stages of plant succession following forest fires Ecology 10 177–190
W.P. Sousa J.H. Connell (1985) ArticleTitleFurther comments on the evidence for multiple stable points in natural communities Am. Nat. 125 612–615 Occurrence Handle10.1086/284366
InstitutionalAuthorNameSPSS (2001) SPSS 11.0 1 for windows SPSS Chicago, USA
A.H. Strahler (1978) ArticleTitleResponse of woody species to site factors of sloperock typeand topographic position in Maryland as evaluated by binary discriminant analysis J. Biogeogr. 5 403–423
C.J.F. ter Braak P. Šmilauer (2002) canoco reference manual and user’s guide to Canoco for Windows: Software for canonical community ordination (version 4.5) Microcomputer Power Ithaca, USA
G.E. Uno S.L. Collins (1987) ArticleTitlePrimary succession on granite outcrops in southwestern Oklahoma Bull. Torrey Bot. Club 114 387–392
J.J. Veillette (1994) ArticleTitleEvolution and paleohydrology of glacial lakes Barlow and Ojibway Quaternary Sci. Rev. 13 945–971 Occurrence Handle10.1016/0277-3791(94)90010-8
J.-S. Vincent L. Hardy (1977) ArticleTitleL’évolution et l’extension des lacs glaciaires Barlow et Ojibway en territoire québécois Géogr. phys. Quatern. 31 357–372
E. Whitehouse (1933) ArticleTitlePlant succession on central Texas granite Ecology 14 391–405
C. Whitlock (1993) ArticleTitlePostglacial vegetation and climate of Grand Teton and southern Yellowstone National Parks Ecol. Monogr. 63 173–198
G.S. Winterringer A.G. Vestal (1956) ArticleTitleRock-ledge vegetation in southern Illinois Ecol. Monogr. 26 105–130
S.K. Wiser R.K. Peet P.S. White (1996) ArticleTitleHigh-elevation rock outcrop vegetation of the Southern Appalachian Mountains J. Veg. Sci. 7 703–722
J.H. Zar (1996) Biostatistical Analysis EditionNumber3 Prentice-Hall Inc Upper Saddle River, USA
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Asselin, H., Belleau, A. & Bergeron, Y. Factors Responsible for the Co-occurrence of Forested and Unforested Rock Outcrops in the Boreal Forest. Landscape Ecol 21, 271–280 (2006). https://doi.org/10.1007/s10980-005-1393-1
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DOI: https://doi.org/10.1007/s10980-005-1393-1