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Wetlands

, Volume 39, Issue 4, pp 841–852 | Cite as

Tree Encroachment Induces Biotic Differentiation in Sphagnum-Dominated Bogs

  • Maya Favreau
  • Stéphanie PellerinEmail author
  • Monique Poulin
Peatlands

Abstract

This study aims to understand the effects of recent tree encroachment on plant richness and diversity of Sphagnum-dominated bogs isolated in an agricultural landscape. A nested paired sampling design was used to compare plant species richness and beta diversity between open and forested habitats of 14 bogs in southern Québec, Canada. We evaluated the impact of tree encroachment at regional and local scales (between and within bogs, respectively). Tree basal area, canopy openness and stand age were evaluated in forested habitats. We used permutation paired sample t-tests to compare species richness between open and forested sites. Beta diversity was calculated as between-site similarities in composition, and differences were evaluated using tests for homogeneity in multivariate dispersion. Forested habitats had greater species richness than open habitats due to enrichment by facultative and non-peatland species as well as by mid- and shade-tolerant vascular plants. At both scales, this species enrichment was associated with flora differentiation (increase of beta diversity), although at regional scale, this was true for bryophytes only. Tree basal area had a positive influence on forested habitats species richness. These compositional changes are expected to increase similarity between bog flora and upland vegetation, and consequently decrease regional diversity.

Keywords

Beta diversity Biotic homogenization Multivariate dispersion Species richness Species turnover Tree encroachment 

Notes

Acknowledgements

This research received financial support from the Natural Sciences and Engineering Research Council of Canada (Discovery grant to S. Pellerin: RGPIN-2014-05367 and M. Poulin RGPIN-2014-05663) and the Québec Centre for Biodiversity Science. We are grateful to all landowners, including the Government of Québec, Nature Action and Transport Canada, who allowed us to conduct field sampling on their lands. Our thanks to numerous field assistants, P. Legendre and S. Daigle for statistical advices and K. Grislis for linguistic revision.

Supplementary material

13157_2018_1122_MOESM1_ESM.docx (120 kb)
ESM 1 (DOCX 119 kb)

References

  1. Anderson MJ (2001) A new method for non-parametric multivariate analysis of variance. Austral Ecology 26:32–46.  https://doi.org/10.1111/j.1442-9993.2001.01070.pp.x Google Scholar
  2. Anderson MJ (2006) Distance-based tests for homogeneity of multivariate dispersions. Biometrics 62:245–253.  https://doi.org/10.1111/j.1541-0420.2005.00440.x CrossRefGoogle Scholar
  3. Anderson MJ, Walsh DCI (2013) PERMANOVA, ANOSIM, and the Mantel test in the face of heterogeneous dispersions: What null hypothesis are you testing? Ecological Monographs 83:557–574.  https://doi.org/10.1890/12-2010.1 CrossRefGoogle Scholar
  4. Bart D, Davenport T, Yantes A (2016) Environmental predictors of woody plant encroachment in calcareous fens are modified by biotic and abiotic land-use legacies. Journal of Applied Ecology 53:541–549.  https://doi.org/10.1111/1365-2664.12567 CrossRefGoogle Scholar
  5. Beauregard, P (2017) Dynamique du bouleau gris (Betula populifolia) dans les tourbières ombrotrophes de la Montérégie (Québec). Dissertation, Université LavalGoogle Scholar
  6. Beauvais M-P, Pellerin S, Lavoie C (2016) Beta diversity declines while native plant species richness triples over 35 years in a suburban protected area. Biological Conservation 195:73–81.  https://doi.org/10.1016/j.biocon.2015.12.040 CrossRefGoogle Scholar
  7. Berendse F, Van Breemen N, Rydin H et al (2001) Raised atmospheric CO2 levels and increased N deposition cause shifts in plant species composition and production in Sphagnum bogs. Global Change Biology 7:591–598.  https://doi.org/10.1046/j.1365-2486.2001.00433.x CrossRefGoogle Scholar
  8. Berg EE, Hillman KM, Dial R, DeRuwe A (2009) Recent woody invasion of wetlands on the Kenai Peninsula Lowlands, south-central Alaska: a major regime shift after 18000 years of wet Sphagnum–sedge peat recruitment. Canadian Journal of Forest Research 39:2033–2046.  https://doi.org/10.1139/X09-121 CrossRefGoogle Scholar
  9. Bowman DMJS, Riley JE, Boggs GS et al (2008) Do feral buffalo (Bubalus bubalis) explain the increase of woody cover in savannas of Kakadu National Park, Australia? Journal of Biogeography 35:1976–1988.  https://doi.org/10.1111/j.1365-2699.2008.01934.x CrossRefGoogle Scholar
  10. Brice M-H, Pellerin S, Poulin M (2016) Environmental filtering and spatial processes in urban riparian forests. Journal of Vegetation Science 27:1023–1035.  https://doi.org/10.1111/jvs.12425 CrossRefGoogle Scholar
  11. Brice M-H, Pellerin S, Poulin M (2017) Does urbanization lead to taxonomic and functional homogenization in riparian forests? Diversity and Distributions 23:828–840.  https://doi.org/10.1111/ddi.12565 CrossRefGoogle Scholar
  12. Broman KW, Broman AT (2017) broman: Karl Broman’s R Code. R package version 0.67–4. Available at https://CRAN.r-project.org/package=broman
  13. Brouillet L, Coursol F, Meades SJ et al (2017) VASCAN, the Database of Vascular Plants of Canada. Available at http://data.canadensys.net/vascan/. Accessed 28 Mar 2017  https://doi.org/10.3897/phytokeys.25.3100
  14. Bruce KA, Cameron GN, Harcombe PA (1995) Initiation of a new woodland type on the Texas coastal prairie by the Chinese Tallow Tree (Sapium sebiferum (L.) Roxb.). Bulletin of the Torrey Botanical Club 122:215–225.  https://doi.org/10.2307/2996086 CrossRefGoogle Scholar
  15. Calmé S, Desrochers A, Savard J-PL (2002) Regional significance of peatlands for avifaunal diversity in southern Québec. Biological Conservation 107:273–281.  https://doi.org/10.1016/S0006-3207(02)00063-0 CrossRefGoogle Scholar
  16. Clark DL, Wilson MV (2001) Fire, mowing, and hand-removal of woody species in restoring a native wetland prairie in the Willamette valley of Oregon. Wetlands 21:135–144. https://doi.org/10.1672/0277-5212(2001)021[0135:FMAHRO]2.0.CO;2Google Scholar
  17. Dyderski MK, Gdula AK, Jagodziński AM (2015) Encroachment of woody species on a drained transitional peat bog in ‘Mszar Bogdaniec’ nature reserve (Western Poland). Folia Forestalia Polonica 57:160–172.  https://doi.org/10.1515/ffp-2015-0016 CrossRefGoogle Scholar
  18. Eldridge DJ, Soliveres S (2014) Are shrubs really a sign of declining ecosystem function? Disentangling the myths and truths of woody encroachment in Australia. Australian Journal of Botany 62(7):594–608.  https://doi.org/10.1071/BT14137 CrossRefGoogle Scholar
  19. Eldridge DJ, Bowker MA, Maestre FT et al (2011) Impacts of shrub encroachment on ecosystem structure and functioning: towards a global synthesis: Synthesizing shrub encroachment effects. Ecology Letters 14:709–722.  https://doi.org/10.1111/j.1461-0248.2011.01630.x CrossRefGoogle Scholar
  20. Environment Canada (2011) Canadian Climate Normals 1981–2010. Available at http://climate.weather.gc.ca/climate_normals/index_e.html. Accessed 12 Oct 2017
  21. Eppinga MB, Rietkerk M, Wassen MJ, Ruiter PCD (2009) Linking habitat modification to catastrophic shifts and vegetation patterns in bogs. Plant Ecology 200:53–68.  https://doi.org/10.1007/s11258-007-9309-6 CrossRefGoogle Scholar
  22. Faubert J (2012) Flore des bryophytes du Quebec-Labrador : Volume 1. Anthocérotes et hépatiques. Société québécoise de bryologie, Saint-Valérien, QuébecGoogle Scholar
  23. Faubert J (2013) Flore des bryophytes du Québec-Labrador : Volume 2, Mousses, première partie. Société québécoise de bryologie, Saint-Valérien, QuébecGoogle Scholar
  24. Faubert J (2014) Flore des bryophytes du Québec-Labrador : Volume 3, Mousses, seconde partie. Société québécoise de bryologie, Saint-Valérien, QuébecGoogle Scholar
  25. Flinn KM, Lechowicz MJ, Waterway MJ (2008) Plant species diversity and composition of wetlands within an upland forest. American Journal of Botany 95:1216–1224.  https://doi.org/10.3732/ajb.0800098 CrossRefGoogle Scholar
  26. França F, Louzada J, Korasaki V, Griffiths H, Silveira JM, Barlow J (2016) Do space-for-time assessments underestimate the impacts of logging on tropical biodiversity? An Amazonian case study using dung beetles. Journal of Applied Ecology 53:1098–1105.  https://doi.org/10.1111/1365-2264.12657 CrossRefGoogle Scholar
  27. Frankl R, Schmeidl H (2000) Vegetation change in a South German raised bog: Ecosystem engineering by plant species, vegetation switch or ecosystem level feedback mechanisms? Flora 195:267–276.  https://doi.org/10.1016/S0367-2530(17)30980-5 CrossRefGoogle Scholar
  28. Galatowitsch SM, Anderson NO, Ascher PD (1999) Invasiveness in wetland plants in temperate North America. Wetlands 19:733–755.  https://doi.org/10.1007/BF03161781 CrossRefGoogle Scholar
  29. Garneau M (2001) Statut trophique des taxons préférentiels et des taxons fréquents mais non préférentiels des tourbières naturelles du Québec-Labrador. In: Payette S, Rochefort L (eds) Écologie des tourbières du Québec-Labrador. Presses Université Laval, Québec, pp 523–532Google Scholar
  30. Guido A, Salengue E, Dresseno A (2017) Effect of shrub encroachment on vegetation communities in Brazilian forest-grassland mosaics. Perspectives in Ecology and Conservation 15:52–55.  https://doi.org/10.1016/j.pecon.2016.11.002 CrossRefGoogle Scholar
  31. Gunnarsson U, Malmer N, Rydin H (2002) Dynamics or constancy in Sphagnum dominated mire ecosystems? A 40-year study. Ecography 25:685–704.  https://doi.org/10.1034/j.1600-0587.2002.250605.x CrossRefGoogle Scholar
  32. Heijmans MMPD, van der Knaap YAM, Holmgren M, Limpens J (2013) Persistent versus transient tree encroachment of temperate peat bogs: effects of climate warming and drought events. Global Change Biology 19:2240–2250.  https://doi.org/10.1111/gcb.12202 CrossRefGoogle Scholar
  33. Helm A, Hanski I, Pärtel M (2006) Slow response of plant species richness to habitat loss and fragmentation. Ecology Letters 9:72–77.  https://doi.org/10.1111/j.1461-0248.2005.00841.x Google Scholar
  34. Holmgren M, Lin C-Y, Murillo JE et al (2015) Positive shrub–tree interactions facilitate woody encroachment in boreal peatlands. Journal of Ecology 103:58–66.  https://doi.org/10.1111/1365-2745.12331 CrossRefGoogle Scholar
  35. Ingerpuu N, Vellak K, Kukk T, Pärtel M (2001) Bryophyte and vascular plant species richness in boreo-nemoral moist forests and mires. Biodiversity & Conservation 10:2153–2166.  https://doi.org/10.1023/A:1013141609742 CrossRefGoogle Scholar
  36. Ireland AW, Booth RK (2012) Upland deforestation triggered an ecosystem state-shift in a kettle peatland. Journal of Ecology 100:586–596.  https://doi.org/10.1111/j.1365-2745.2012.01961.x CrossRefGoogle Scholar
  37. Kapfer J, Grytnes J-A, Gunnarsson U, Birks HJB (2011) Fine-scale changes in vegetation composition in a boreal mire over 50 years. Journal of Ecology 99:1179–1189.  https://doi.org/10.1111/j.1365-2745.2011.01847.x CrossRefGoogle Scholar
  38. Lachance D, Lavoie C, Desrochers A (2005) The impact of peatland afforestation on plant and bird diversity in southeastern Québec. Écoscience 12:161–171.  https://doi.org/10.2980/i1195-6860-12-2-161.1 CrossRefGoogle Scholar
  39. Laine J, Vasander H, Laiho R (1995) Long-term effects of water level drawdown on the vegetation of drained pine mires in southern Finland. Journal of Applied Ecology 32:785–802.  https://doi.org/10.2307/2404818 CrossRefGoogle Scholar
  40. Lapointe M (2014) Plantes de milieux humides et de bord de mer du Québec et des Maritimes. Michel Quintin, Montréal, QuébecGoogle Scholar
  41. Lee A, Fujita H, Kobayashi H (2017) Effects of drainage on open-water mire pools: open water shrinkage and vegetation change of pool plant communities. Wetlands 37:741–751.  https://doi.org/10.1007/s13157-017-0907-3 CrossRefGoogle Scholar
  42. Legendre P (2014) Interpreting the replacement and richness difference components of beta diversity. Global Ecology and Biogeography 23:1324–1334.  https://doi.org/10.1111/geb.12207 CrossRefGoogle Scholar
  43. Legendre P, De Cáceres M (2013) Beta diversity as the variance of community data: dissimilarity coefficients and partitioning. Ecology Letters 16:951–963.  https://doi.org/10.1111/ele.12141 CrossRefGoogle Scholar
  44. Lemmon PE (1956) A spherical densiometer for estimating forest overstory density. Forest Science 2:314–320.  https://doi.org/10.1093/forestscience/2.4.314 Google Scholar
  45. Lenth RV (2016) Least-Squares Means: The R Package lsmeans. Journal of Statistical Software 69:1–33.  https://doi.org/10.18637/jss.v069.i01
  46. Lett MS, Knapp AK (2003) Consequences of shrub expansion in mesic grassland: Resource alterations and graminoid responses. Journal of Vegetation Science 14:487–496.  https://doi.org/10.1111/j.1654-1103.2003.tb02175.x CrossRefGoogle Scholar
  47. Lieffers VJ, Rothwell RL (1986) Effects of depth of water table and substrate temperature on root and top growth of Picea mariana and Larix laricina seedlings. Canadian Journal of Forest Research 16:1201–1206.  https://doi.org/10.1139/x86-214 CrossRefGoogle Scholar
  48. Limpens J, Berendse F, Klees H (2003) N deposition affects N availability in interstitial water, growth of Sphagnum and invasion of vascular plants in bog vegetation. The New Phytologist 157:339–347.  https://doi.org/10.1046/j.1469-8137.2003.00667.x CrossRefGoogle Scholar
  49. Lindborg R, Eriksson O (2004) Historical landscape connectivity affects present plant species diversity. Ecology 85:1840–1845.  https://doi.org/10.1890/04-0367 CrossRefGoogle Scholar
  50. Macdonald SE, Lieffers VJ (1990) Photosynthesis, water relations, and foliar nitrogen of Picea mariana and Larix laricina from drained and undrained peatlands. Canadian Journal of Forest Research 20:995–1000.  https://doi.org/10.1139/x90-133 CrossRefGoogle Scholar
  51. McKinney ML, Lockwood JL (1999) Biotic homogenization: a few winners replacing many losers in the next mass extinction. Trends in Ecology & Evolution 14:450–453.  https://doi.org/10.1016/S0169-5347(99)01679-1 CrossRefGoogle Scholar
  52. Middleton BA, Holsten B, van Diggelen R (2006) Biodiversity management of fens and fen meadows by grazing, cutting and burning. Applied Vegetation Science 9:307–316.  https://doi.org/10.1111/j.1654-109X.2006.tb00680.x CrossRefGoogle Scholar
  53. Moore PD (2002) The future of cool temperate bogs. Environmental Conservation 29:3–20.  https://doi.org/10.1017/S0376892902000024 CrossRefGoogle Scholar
  54. New England Wild Flower Society (2017) Go Botany. Available at https://gobotany.newenglandwild.org/. Accessed 29 Sep 2017
  55. Ohlson M, Økland RH, Nordbakken J-F, Dahlberg B (2001) Fatal interactions between Scots Pine and Sphagnum mosses in bog ecosystems. Oikos 94:425–432.  https://doi.org/10.1034/j.1600-0706.2001.940305.x CrossRefGoogle Scholar
  56. Oksanen J, Blanchet FG, Friendly M et al (2017) vegan: Community Ecology Package. R package version 2:4–6 Available at https://CRAN.rproject.org/packag=broman Google Scholar
  57. Olden JD, Poff NL (2003) Toward a mechanistic understanding and prediction of biotic homogenization. The American Naturalist 162:442–460.  https://doi.org/10.1086/378212 CrossRefGoogle Scholar
  58. Osland MJ, Enwright N, Day RH, Doyle TW (2013) Winter climate change and coastal wetland foundation species: salt marshes vs. mangrove forests in the southeastern United States. Global Change Biology 19:1482–1494.  https://doi.org/10.1111/gcb.12126 CrossRefGoogle Scholar
  59. Paradis É, Rochefort L (2017) Management of the margins in cutover bogs: ecological conditions and effects of afforestation. Wetlands Ecology and Management 25:177–190.  https://doi.org/10.1007/s11273-016-9508-9 CrossRefGoogle Scholar
  60. Pärtel M (2002) Local plant diversity patterns and evolutionary history at the regional scale. Ecology 83:2361–2366. https://doi.org/10.1890/00129658(2002)083[2361:LPDPAE]2.0.CO;2Google Scholar
  61. Pasquet S, Pellerin S, Poulin M (2015) Three decades of vegetation changes in peatlands isolated in an agricultural landscape. Applied Vegetation Science 18:220–229.  https://doi.org/10.1111/avsc.12142 CrossRefGoogle Scholar
  62. Pellerin S, Lavoie C (2003a) Reconstructing the recent dynamics of mires using a multitechnique approach. Journal of Ecology 91:1008–1021.  https://doi.org/10.1046/j.1365-2745.2003.00834.x CrossRefGoogle Scholar
  63. Pellerin S, Lavoie C (2003b) Recent expansion of jack pine in peatlands of southeastern Québec: A paleoecological study. Écoscience 10(2):247–257.  https://doi.org/10.1080/11956860.2003.11682772 CrossRefGoogle Scholar
  64. Pellerin S, Mercure M, Desaulniers AS, Lavoie C (2009) Changes in plant communities over three decades on two disturbed bogs in southeastern Québec. Applied Vegetation Science 12:107–118.  https://doi.org/10.1111/j.1654-109X.2009.01008.x CrossRefGoogle Scholar
  65. Pellerin S, Lavoie M, Boucheny A, Larocque M, Garneau M (2016) Recent vegetation dynamics and hydrological changes in bogs located in an agricultural landscape. Wetlands 36:159–168.  https://doi.org/10.1007/s13157-015-0726-3 CrossRefGoogle Scholar
  66. Peringer A, Rosenthal G (2011) Establishment patterns in a secondary tree line ecotone. Ecological Modelling 222:3120–3131.  https://doi.org/10.1016/j.ecolmodel.2011.05.025 CrossRefGoogle Scholar
  67. Pickett STA (1989) Space-for-time substitution as an alternative to long-term studies. In: Likens GE (ed) Long-Term Studies in Ecology. Springer, New York, pp 110–135.  https://doi.org/10.1007/978-1-4615-7358-6_5 CrossRefGoogle Scholar
  68. Pollock MM, Naiman RJ, Hanley TA (1998) Plant species richness in riparian wetlands–a test of biodiversity theory. Ecology 79:94–105. https://doi.org/10.1890/0012-9658(1998)079[0094:PSRIRW]2.0.CO;2Google Scholar
  69. Poulin M, Careau D, Rochefort L, Desrochers A (2002) From satellite imagery to peatland vegetation diversity: How reliable are habitat maps? Conservation Ecology 24(6):651–665.  https://doi.org/10.5751/ES-00446-060216 Google Scholar
  70. Poulin M, Pellerin S, Cimon-Morin J et al (2016) Inefficacy of wetland legislation for conserving Quebec wetlands as revealed by mapping of recent disturbances. Wetlands Ecology and Management 24:651–665.  https://doi.org/10.1007/s11273-016-9494-y CrossRefGoogle Scholar
  71. Price JN, Morgan JW (2008) Woody plant encroachment reduces species richness of herb-rich woodlands in southern Australia. Austral Ecology 33:278–289.  https://doi.org/10.1111/j.1442-9993.2007.01815.x CrossRefGoogle Scholar
  72. Qian H, Guo Q (2010) Linking biotic homogenization to habitat type, invasiveness and growth form of naturalized alien plants in North America. Diversity and Distributions 16:119–125.  https://doi.org/10.1111/j.1472-4642.2009.00627.x CrossRefGoogle Scholar
  73. R Core Team (2016) R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing, Vienna, AustriaGoogle Scholar
  74. Ratajczak Z, Nippert JB, Collins SL (2012) Woody encroachment decreases diversity across North American grasslands and savannas. Ecology 93:697–703.  https://doi.org/10.1890/11-1199.1 CrossRefGoogle Scholar
  75. Ratcliffe JL, Creevy A, Andersen R et al (2017) Ecological and environmental transition across the forested-to-open bog ecotone in a west Siberian peatland. Science of the Total Environment 607–608:816–828.  https://doi.org/10.1016/j.scitotenv.2017.06.276 CrossRefGoogle Scholar
  76. Ricklefs RE, Guo Q, Qian H (2008) Growth form and distribution of introduced plants in their native and non-native ranges in Eastern Asia and North America. Diversity & Distributions 14:381–386.  https://doi.org/10.1111/j.1472-4642.2007.00457.x CrossRefGoogle Scholar
  77. Rooney TP, Olden JD, Leach MK, Rogers DA (2007) Biotic homogenization and conservation prioritization. Biological Conservation 134:447–450.  https://doi.org/10.1016/j.biocon.2006.07.008 CrossRefGoogle Scholar
  78. Saintilan N, Rogers K (2015) Woody plant encroachment of grasslands: a comparison of terrestrial and wetland settings. New Phytologist 205:1062–1070.  https://doi.org/10.1111/nph.13147 CrossRefGoogle Scholar
  79. Santamaría L (2002) Why are most aquatic plants widely distributed? Dispersal, clonal growth and small-scale heterogeneity in a stressful environment. Acta Oecologica 23:137–154.  https://doi.org/10.1016/S1146-609X(02)01146-3 CrossRefGoogle Scholar
  80. Sarkkola S, Hökkä H, Koivusalo H et al (2010) Role of tree stand evapotranspiration in maintaining satisfactory drainage conditions in drained peatlands. Canadian Journal of Forest Research 40:1485–1496.  https://doi.org/10.1139/X10-084 CrossRefGoogle Scholar
  81. Savage J, Vellend M (2015) Elevational shifts, biotic homogenization and time lags in vegetation change during 40 years of climate warming. Ecography 38:546–555.  https://doi.org/10.1111/ecog.01131 CrossRefGoogle Scholar
  82. Shirley LJ, Battaglia LL (2006) Assessing vegetation change in coastal landscapes of the northern Gulf of Mexico. Wetlands 26:1057–1070. https://doi.org/10.1672/0277-5212(2006)26[1057:AVCICL]2.0.CO;2Google Scholar
  83. Siitonen J, Martikainen P, Punttila P, Rauh J (2000) Coarse woody debris and stand characteristics in mature managed and old-growth boreal mesic forests in southern Finland. Forest Ecology and Management 128:211–225.  https://doi.org/10.1016/S0378-1127(99)00148-6 CrossRefGoogle Scholar
  84. Statistics Canada (2010) St-Laurent Lowlands ecoregion. Available at http://www.statcan.gc.ca/pub/16-002-x/2010002/tbl/11285/tbl001-eng.htm. Accessed 20 Sep 2017
  85. Talbot J, Richard PJH, Roulet NT, Booth RK (2010) Assessing long-term hydrological and ecological responses to drainage in a raised bog using paleoecology and a hydrosequence. Journal of Vegetation Science 21:143–156.  https://doi.org/10.1111/j.1654-1103.2009.01128.x CrossRefGoogle Scholar
  86. Tilman D, May RM, Lehman CL, Nowak MA (1994) Habitat destruction and the extinction debt. Nature 371:65–66.  https://doi.org/10.1038/371065a0 CrossRefGoogle Scholar
  87. Tousignant M-Ê, Pellerin S, Brisson J (2010) The relative impact of human disturbances on the vegetation of a large wetland complex. Wetlands 30:333–344.  https://doi.org/10.1007/s13157-010-0019-9 CrossRefGoogle Scholar
  88. Turunen J, Roulet NT, Moore TR, Richard PJH (2004) Nitrogen deposition and increased carbon accumulation in ombrotrophic peatlands in eastern Canada. Global Biochemical Cycles.  https://doi.org/10.1029/2003GB002154
  89. USDA and NRCS (2018) The PLANTS Database. Available at https://www.plants.usda.gov. Accessed 23 Mar 2018
  90. Van Auken OW (2000) Shrub invasions of North American semiarid grasslands. Annual Review of Ecology and Systematics 31:197–215.  https://doi.org/10.1146/annurev.ecolsys.31.1.197 CrossRefGoogle Scholar
  91. Vitt DH (2006) Functional characteristics and indicators of boreal peatlands. In: Wieder RK, Vitt DH (eds) Boreal Peatland Ecosystems. Springer, Berlin, pp 9–24.  https://doi.org/10.1007/978-3-540-31913-9_2 CrossRefGoogle Scholar
  92. Vitt DH, Li Y, Belland RJ (1995) Patterns of bryophyte diversity in peatlands of continental Western Canada. The Bryologist 98:218–227.  https://doi.org/10.2307/3243306 CrossRefGoogle Scholar
  93. Warner BG, Asada T (2006) Biological diversity of peatlands in Canada. Aquatic Sciences 68:240–253.  https://doi.org/10.1007/s00027-006-0853-2 CrossRefGoogle Scholar
  94. Warren RJ, Rossell IM, Moorhead KK, Dan Pittillo J (2007) The influence of woody encroachment upon herbaceous vegetation in a southern Appalachian wetland complex. The American Midland Naturalist 157:39–51. https://doi.org/10.1674/0003-0031(2007)157[39:TIOWEU]2.0.CO;2Google Scholar
  95. Wertebach T-M, Hölzel N, Kleinebecker T (2014) Birch encroachment affects the base cation chemistry in a restored bog. Ecohydrology 7:1163–1171.  https://doi.org/10.1002/eco.1447 Google Scholar
  96. Wheeler BD (1993) Botanical diversity in British mires. Biodiversity and Conservation 2:490–512.  https://doi.org/10.1007/BF00056744 CrossRefGoogle Scholar
  97. Wilson JB, Peet RK, Dengler J, Pärtel M (2012) Plant species richness: the world records. Journal of Vegetation Science 23:796–802.  https://doi.org/10.1111/j.1654-1103.2012.01400.x CrossRefGoogle Scholar
  98. Woziwoda B, Kopeć D (2014) Afforestation or natural succession? Looking for the best way to manage abandoned cut-over peatlands for biodiversity conservation. Ecological Engineering 63:143–152.  https://doi.org/10.1016/j.ecoleng.2012.12.106 CrossRefGoogle Scholar
  99. Zedler JB, Kercher S (2004) Causes and consequences of invasive plants in wetlands: opportunities, opportunists, and outcomes. Critical Reviews in Plant Sciences 23:431–452.  https://doi.org/10.1080/07352680490514673 CrossRefGoogle Scholar
  100. Zoltai SC, Vitt DH (1995) Canadian wetlands: Environmental gradients and classification. Plant Ecology 118:131–137.  https://doi.org/10.1007/BF00045195 CrossRefGoogle Scholar

Copyright information

© Society of Wetland Scientists 2019

Authors and Affiliations

  1. 1.Institut de recherche en biologie végétaleUniversité de Montréal and Jardin botanique de MontréalQCCanada
  2. 2.Québec Centre for Biodiversity ScienceMcGill UniversityQCCanada
  3. 3.Department of PhytologyUniversité LavalQCCanada

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