Abstract
Invasive grasses are an important threat in tropical savannas and grasslands and may be affected by natural and anthropogenic features of the environment. They may affect native species at a variety of scales, but a spatially explicit assessment of their effects is lacking. We studied the spatial pattern of native and invasive graminoids in Brazilian cerrado in southeastern Brazil and assessed the effects of vegetation type, elevation, and edges. We sampled native grasses, native sedges, and two invasive grass species (Urochloa decumbens and Melinis minutiflora) along three 301- to 1334-m-long transects encompassing grassland, forest, and savanna. We used wavelet transforms, generalized additive models, and null model simulations for analysis. Invasive grasses were mostly found in open vegetation. Neither native nor invasive species were consistently affected by elevation or edges. Much of the spatial variation could be explained by small-scale autocorrelation, but M. minutiflora had a more heterogeneous pattern than U. decumbens. Invasive grasses were negatively related to native ones at a variety of scales, from 1 to 66 m, and we observed both positive and negative relations between the two invasive species, with positive ones a finer scales. We hypothesize that spatial pattern characteristics of different invasive species may be related to their invasion potential.
This is a preview of subscription content, access via your institution.




References
Almeida-Neto M, Prado PI, Kubota U, Bariani JM, Aguirre GH, Lewinsohn TM (2010) Invasive grasses and native Asteraceae in Brazilian Cerrado. Plant Ecol 209:109–122
Ashton IW, Symstad AJ, Davis CJ, Swanson DJ (2016) Preserving prairies: understanding temporal and spatial patterns of invasive annual bromes in the Northern Great Plains. Ecosphere 7:e01438
Augustine DJ (2003) Spatial heterogeneity in the herbaceous layer of a semi-arid savanna ecosystem. Plant Ecol 167:319–332
Bacaro G, Maccherini S, Chiarucci A, Jentsch A, Rocchini D, Torri D, Gioria M, Tordoni E, Martellos S, Altobelli A, Otto R, Escudero CG, Fernández-Lugo S, Fernández-Palacios JM, Arévalo JR (2015) Distributional patterns of endemic, native and alien species along a roadside elevation gradient in Tenerife, Canary Islands. Commun Ecol 16:223–234
Baruch Z, Jackson R (2005) Responses of tropical native and invader C4 grasses to water stress, clipping and increased atmospheric CO2 concentration. Oecologia 145:522–532. https://doi.org/10.1007/s00442-005-0153-x
Belote RT, Weltzin JF (2006) Interactions between two co-dominant, invasive plants in the understory of a temperate deciduous forest. Biol Invasions 8:1629–1641. https://doi.org/10.1007/s10530-005-3932-8
Chapman JI, Myers AL, Burky AJ, McEwan W (2015) Edge effects, invasion, and the spatial pattern of herb-layer biodiversity in an old-growth deciduous forest fragment. Nat Areas J 35:439–451
Chesson P (2000) Mechanisms of maintenance of species diversity. Annu Rev Ecol Syst 31:343–366
Chudomelová M, Zelený D, Li CF (2017) Contrasting patterns of fine-scale herb layer species composition in temperate forests. Acta Oecologica 80:24–31
Cilliers SS, Williams NSG, Barnard FJ (2008) Patterns of invasive plant invasions in fragmented urban and rural grasslands across continents. Landsc Ecol 23:1243–1256
Constantine W, Percival D (2012) Wavelet methods for time series analysis. R package version 1.1-1. https://CRAN.R-project.org/package=wmtsa. Accessed 6 June 2019
Coutinho LM (1978) O conceito de cerrado. Revista Brasileira de Botânica 1:17–23
Dale MRT (1999) Spatial pattern analysis in plant ecology. Cambridge Univ. Press, Cambridge
Dale MRT, Mah M (1998) The use of wavelets for spatial pattern analysis in ecology. J Veg Sci 9:805–814
Dantas VL, Batalha MA (2011) Vegetation structure: fine scale relationships with soil in a cerrado site. Flora 206:341–346
D'Antonio CM, Vitousek PM (1992) Biological invasions by exotic grasses, the grass/fire cycle, and global change. Annu Rev Ecol Syst 23:63–87
D'Antonio CM, Hughes RF, Tunison JT (2011) Long-term impacts of invasive grasses and subsequent fire in seasonally dry Hawaiian woodlands. Ecol Appl 21:1617–1628
Davis MA, Anderson MD, Bock-Brownstein L, Staudenmaier A, Suliteanu M, Wareham A, Dosch JJ (2015) Little evidence of native and non-native species influencing one another's abundance and distribution in the herb layer of an oak woodland. J Veg Sci 26:1005–1012
Dias-Filho MB, Carvalho CJR (2000) Physiological and morphological responces of Brachiaria spp. to flooding. Pesquisa Agropecuária Brasileira 35(10):1959–1966
Dodonov P (2015) Assessment of edge influence in heterogeous vegetation using spatial pattern analysis. PhD thesis, Federal University of São Carlos, Brazil
Dodonov P, Harper KA, Silva-Matos DM (2013) The role of edge contrast and forest structure in edge influence: vegetation and microclimate at edges in the Brazilian cerrado. Plant Ecol 214:1345–1359
Dodonov P, Silva DM, Rosatti NB (2014) Understorey vegetation gradient in a Eucalyptus grandis plantation between a savanna and a semideciduous forest. N Zeal J For Sci 44:10
Dodonov P, Xavier RO, Tiberio FCS, Lucena IC, Zanelli CB, Silva-Matos DM (2014) Driving factors of small-scale variability in a savanna plant population after a fire. Acta Oecologica 56:47–55
Dodonov P, Braga AL, Harper KA, Silva-Matos DM (2017) Edge influence on plant litter biomass in forest and savanna in the Brazilian cerrado. Austral Ecology 42:187–197
Dong X, Nyren P, Patton B, Nyren A, Richardson J, Maresca T (2008) Wavelets for agriculture and biology: a tutorial with applications and outlook. Bioscience 58:445–453
Durrett R, Levin S (1998) Spatial aspects of interspecific competition. Theor Popul Biol 53:30–43
Fortin MJ, Jacquez GM (2000) Randomization tests and spatially auto-correlated data. Bull Ecol Soc Am 81:201–205
Fushita AT, Santos JE, Rocha YT, Zanin EM (2017) Historical land use/cover changes and the hemeroby levels of a bio-cultural landscape: past, present and future. J Geogr Inf Syst 9:576–590
Gardener C, McIvor J, Jansen A (1993) Passage of legume and grass seeds through the digestive tract of cattle and their survival in faeces. J Appl Ecol 30:63–74
Gelbard JL, Belnap J (2003) Roads as conduits for invasive plant invasions in a semiarid landscape. Conserv Biol 17:420–432
Gibson DJ, Hulbert LC (1987) Effects of fire, topography and year-to-year climatic variation on species composition in tallgrass prairie. Vegetatio 72(3):175–185
Gonçalves CS, Batalha MA (2011) Towards testing the “honeycomb rippling model” in cerrado. Braz J Biol 71:1–8
Harper KA, Lavallee AA, Dodonov P (2018) Patterns of shrub abundance and relationships with other plant types within the forest-tundra ecotone in northern Canada. Arct Sci 4:691–709
Hassell MP, Comins HN, May RM (1994) Species coexistence and self-organizing spatial dynamics. Nature 370:290. https://doi.org/10.1038/370290a0
Hoffmann WA, Haridasan M (2008) The invasive grass, Melinis minutiflora, inhibits tree regeneration in a Neotropical savanna. Austral Ecol 33:29–36
Hoffmann WA, Jaconis SY, McKinley KL, Geiger EL, Gotsch SG, Franco AC (2012) Fuels or microclimate? Understanding the drivers of fire feedbacks at savanna-forest boundaries. Austral Ecol 37:634–643
Hudgins L, Huang J (1996) Bivariate wavelet analysis of Asia Monsoon and ENSO. Adv Atm Sci 13:299–312
James PMA, Fleming RA, Fortin MJ (2010) Identifying significant scale-specific spatial boundaries using wavelets and null models: spruce budworm defoliation in Ontario, Canada as a case study. Landsc Ecol 25:873–887
Jeltsch F, Milton SJ, Dean WRJ, Rooyen N, Moloney KA (1998) Modelling the impact of small-scale heterogeneities on tree grass coexistence in semi-arid savannas. J Ecol 86:780–793
Kauffman JB, Cummings DL, Ward DE (1994) Relationships of fire, biomass and nutrient dynamics along a vegetation gradient in the Brazilian cerrado. J Ecol 82:519–531
Klink CA, Joly CA (1989) Identification and distribution of C3 and C4 grasses in open and shaded habitats in Sao Paulo State, Brazil. Biotropica 21:30–34
Krix DW, Hingee MC, Martin LJ, Phillips ML, Murray BR (2017) Ecological impacts of fire trails on plant assemblages in edge habitat adjacent to trails. Fire Ecol 13:95–119
LaPaix R, Harper K, Freedman B (2012) Patterns of invasive plants in relation to anthropogenic edges within urban forest remnants. Appl Veg Sci 15:525–535
Leite MB, Xavier RO, Oliveira PTS, Silva FKG, Silva-Matos DMS (2018) Groundwater depth as a constraint on the woody cover in a Neotropical Savanna. Plant Soil 426:1–15
MacDonald GR (2004) Cogongrass (Imperata cylindrica) - biology, ecology, and management. Crit Rev Plant Sci 23:367–380
Manly BFJ (2007) Randomizations, bootstrap and Monte Carlo methods in biology, 3rd edn. Chapman and Hall/CRC, London
Martins CR, Hay JDV, Carmona R (2009) Invasion potential of two cultivars of Melinis minutiflora in the Brazilian cerrado - seed characteristics and seedling establishment. Revista Árvore 33:713–722
Mendonça AH, Russo C, Melo AC, Durigan G (2015) Edge effects in savanna fragments: a case study in the cerrado. Plant Ecol Divers 8(4):493–503
Morgan JW (1998) Patterns of invasion of an urban remnant of a species-rich grassland in southeastern Australia by non-native plant species. J Veg Sci 9:181–190
Oliveira FF, Batalha MA (2005) Lognormal abundance distribution of woody species in a cerrado fragment (São Carlos, southeastern Brazil). Revista Brasileira de Botânica 28:39–45
Pauchard A, Shea K (2006) Integrating the study of non-native plant invasions across spatial scales. Biol Invasions 8:399–413
Penone C, Machon N, Julliard R, Le Viol I (2012) Do railway edges provide functional connectivity for plant communities in an urban context? Biol Conserv 148:126–133
Percival DB, Walden AT (2000) Wavelet methods for time series analysis. Cambridge Univ. Press, Cambridge
Petrovskaya N, Petrovskii S, Zhang W (2017) Patch, not patchy, or how much patchy? Classification of spatial patterns appearing in a model of biological invasion. Math Model Nat Phenom 12:208–225
Pivello VR, Carvalho VMC, Lopes PF, Peccinini AA, Rosso S (1999) Abundance and distribution of native and alien grasses in a “cerrado” (Brazilian savanna) ecological reserve. Biotropica 31:71–82
Pivello VR, Shida CN, Meirelles ST (1999) Alien grasses in Brazilian savannas: a threat to the biodiversity. Biodivers Conserv 8:1281–1294
Powell KI, Chase JM, Knight TM (2011) A synthesis of plant invasion effects on biodiversity across spatial scales. Am J Bot 98:539–548
R Core Team (2015) R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. https://www.R-project.org/. Accessed 6 June 2019
Reis CM, Zanchetta D (2006) Plano de manejo integrado das Unidades de Itirapina. Secretaria do Meio Ambiente, São Paulo
Ribeiro JF, Walter BMT (2008) As principais fitofisionomias do bioma cerrado. In: Sano SS, Almeida SP and Ribeiro JF Cerrado: ecologia e flora. Embrapa, Brasilia, pp. 151-212
Rosenberg MS, Anderson CD (2011) PASSaGE: pattern analysis, spatial statistics and geographic exegesis. Version 2 User mannual. Methods Ecol Evol 2:229–232
Rossiter-Rachor NA, Setterfield SA, Douglas MM, Hutley LB, Cook GD, Schmidt S (2009) Invasive Andropogon gayanus (gamba grass) is an ecosystem transformer of nitrogen relations in Australian savanna. Ecol Appl 19(6):1546–1560
Rouyer T, Fromentin JM, Stenseth NC, Cazelles B (2008) Analysing multiple time scales and extending significance testing in wavelet analysis. Mar Ecol Prog Series 359:11–23
Ruggiero PGC, Batalha MA, Pivello VR, Meirelles ST (2002) Soil-vegetation relationships in cerrado (Brazilian savanna) and semideciduous forest, Southeastern Brazil. Plant Ecol 160:1–16
Scholes RJ, Archer SR (1997) Tree-grass interactions in Savannas. Annu Rev Ecol Syst 28:517–544
Shields JM, Jenkins M, Saunders MR, Zhang H, Jenkins LH, Parks AM (2015) Age distribution and spatial patterning of an invasive shrub in secondary hardwood forests. For Sci 60:830–840
Simberloff D, Von Holle B (1999) Positive interactions of nonindigenous species: invasional meltdown? Biol Invasions 1:21–32. https://doi.org/10.1023/a:1010086329619
Smit IPJ, Asner GP (2012) Roads increase woody cover under varying geological rainfall and fire regimes in African savanna. J Arid Environ 80:74–80
Snyder RE, Chesson P (2003) Local dispersal can facilitate coexistence in the presence of permanent spatial heterogeneity. Ecol Lett 6:301–309
Stoll P, Prati D (2001) Intraspecific aggregation alters competitive interactions in experimental plant communities. Ecology 82(2):319–327
Strand EK, Robinson AP, Bunting SP (2007) Spatial patterns on the sagebrush steppe/Western juniper ecotone. Plant Ecol 190:159–173
Suárez-Esteban A, Delibes M, Fedriani JM (2013) Unpaved road verges as hotspots of fleshy-fruited shrub recruitment and establishment. Biol Conserv 167:50–56
Tilman D (1994) Competition and biodiversity in spatially structured habitats. Ecology 75:2–16. https://doi.org/10.2307/1939377
Travis JMJ, Park KJ (2004) Spatial structure and the control of invasive alien species. Anim Conserv 7:321–330. https://doi.org/10.1017/s1367943004001507
Vitousek PM, Walker LR (1989) Biological invasion by myrica faya in Hawai'i: plant demography, nitrogen fixation, ecosystem effects. Ecol Monogr 59:247–265. https://doi.org/10.2307/1942601
Wiegand K, Ward D, Saltz D (2005) Multi-scale patterns and bush encroachment in an arid savanna with a shallow soil layer. J Veg Sci 16:311–320
Wood SN (2011) Fast stable restricted maximum likelihood and marginal likelihood estimation of semiparametric generalized linear models. J R Stat Soc (B) 73(1):3–36
Xavier RO, D’Antonio CM (2017) Multiple ecological strategies explain the distribution of exotic and native C4 grasses in heterogeneous early successional sites in Hawai’i. J Plant Ecol 10(3):426–439
Xavier RO, Leite MB, Silva-Matos DM (2017) Stress responses of native and exotic grasses in a Neotropical savanna predict impacts of global change on invasion spread. Austral Ecol 42(5):562–576
Xavier RO, Leite MB, Silva-Matos DM (2019) Phenological and reproductive traits and their response to environmental variation differ among native and invasive grasses in a Neotropical savanna. Biol Invasions. https://doi.org/10.1007/s10530-019-02013-w
Xiaobing D, Maarel E (1997) Transect-based patch size frequency analysis. J Veg Sci 8:865–872
Zuur A, Ieno EN, Walker N, Saveliev AA, Smith GM (2009) Mixed efects models and extensions in ecology with R. Springer, New York
Acknowledgements
We thank Cinthya Santos, Viviane Pereira, Carolline Fieker, and others for help with fieldwork; Marco Batalha, Milton Ribeiro, Hugo Sarmento, Marcus Cianciaruso, Tadeu Barros, Luciano Lopes, and two anonymous reviewers for suggestions to previous versions of this manuscript; José Eduardo dos Santos and Marcelo Nivert for information on the study sites; and Juliana Santos for help with the map. PD was financed by the Brazilian National Council for Scientific and Technological Development (CNPq Grant 141623/2011-0), the Canadian Department of Foreign Affairs and International Trade via the Emerging Leaders in the Americas Program (ELAP), and the Brazilian Coordination for the Improvement of Higher Education Personnel (Capes). DMSM was financed by CNPq (307839/2014-1).
Author information
Authors and Affiliations
Corresponding author
Additional information
Communicated by James D A Millington.
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Electronic supplementary material
Below is the link to the electronic supplementary material.
Rights and permissions
About this article
Cite this article
Dodonov, P., Harper, K.A., de Oliveira Xavier, R. et al. Spatial pattern of invasive and native graminoids in the Brazilian cerrado. Plant Ecol 220, 741–756 (2019). https://doi.org/10.1007/s11258-019-00949-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11258-019-00949-6
Keywords
- Bivariate wavelets
- Edge influence
- Melinis minutiflora
- Urochloa decumbens
- Wavelet transform