Factors influencing vegetation composition in grasslands under contrasting land use in Gauteng Province, South Africa
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Abstract
Plant species composition is crucial for ecosystem functioning because it influences both ecosystem stability and productivity. Plant species composition is affected by abiotic factors such as environmental moisture and soil properties, as well as biotic influences related to land use and management, which include herbivore grazing. The objective of this study was to compare vegetation structure and composition between protected and adjacent unprotected areas in Gauteng Province, South Africa. Vegetation surveys were conducted at Abe Bailey Nature Reserve (ANR), Roodeplaat Dam Nature Reserve (RNR), and Suikerbosrand Nature Reserve (SNR). Three sites within each nature reserve were paired with adjacent unprotected sites, where species composition and soil chemical properties were determined in Modified-Whittaker plots (MWPs). Plant species were recorded in 18 MWP plots of 1000m2 area, and also species cover, density, and growth forms were recorded in 180 subplots of 1m2 area. We determined similarity in species composition between paired sites using the Jaccard and Sørensen similarity indices, as well as the Bray-Curtis dissimilarity index. We further assessed variations in species composition between study locations and their relations with soil properties using Detrended Correspondence Analysis and Canonical Correspondence Analysis. There was low species composition similarity between the two land use types, but between locations, the ANR and SNR sites showed the most similarity in species composition. The soil variables differed significantly at some paired sites and also between locations. In general, the results indicated a strong association between species composition and environmental factors, specifically soil properties and herbivore grazing intensity.
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-
Anderson, T.M., Ritchie, M.E., McNaughton, S.J. 2007. Rainfall and soils modify plant community response to grazing in Serengeti National Park. Ecology 88: 1191–1201. https://doi.org/10.1890/06-0399.
-
Arevalo, J.R., de Nascimento, L., Fernandez-Lugo, S., Mata, J., Bermejo, L. 2011. Grazing effects on species composition in different vegetation types (La Palma, Canary Islands). Acta Oecologica 37: 230–238. https://doi.org/10.1016/j.actao.2011.02.006.
-
Augustine, D.J., McNaughton, S.J. 1998. Ungulate effects on the functional species composition of plant communities: Herbivore selectivity and plant tolerance. Journal of Wildlife Management 62: 1165–1183. https://doi.org/10.2307/3801981.
-
Averett, J.P., Morris, L.R., Naylor, B.J., Taylor, R.V., Endress, B.A. 2020. Vegetation change over seven years in the largest protected Pacific Northwest Bunchgrass Prairie remnant. PLoS ONE 15: e0227337. https://doi.org/10.1371/journal.pone.0227337.
-
Bagchi, S., Bhatnagar, Y.V., Ritchie, M.E. 2012. Comparing the effects of livestock and native herbivores on plant production and vegetation composition in the Trans-Himalayas. Pastoralism: Research, Policy and Practice 2:21. https://doi.org/10.1186/2041-7136-2-21
-
Biancari, L., Agular, M.R., Eldridge, D.J., Oñatibia, G.R., Le Bagousse-Pinguet, Y., Saiz, H., Gross, N., Austin, A.T., Ochoa, V., Gozalo, B., Asensio, S., Guirado, E., Valencia, E., Berdugo, M., Plaza, C., Martínez-Valderrama, J., Mendoza, B.J., García-Gómez, M., Abedi, M., Ahumada, R.J., Alcántara, J.M., Amghar, F., Anadón, J.D., Aramayo, V., Arredondo, T., Bader, M.Y., , Bahalkeh, K., Salem, F.B., Blaum, N., Boldgiv, B., Bowker M., Branquinho, C., Bu, C., Byambatsogt, B., Calvo, D.A., Monroy, A.P.C., Castro, H., Castro-Quezada, P., Chibani, R., Conceição, A.A., Currier, C.M., Donoso, D.A., Dougill, A., Ejtehadi, H., Espinosa, C.I., Fajardo, A., Farzam, M., Ferrante, D., Fraser, L.H., Gaitán, J.J., Gherardi, L.A., Gusmán-Montalván, E., Hernandéz-Hernandéz, R.M., Hölzel, N., Huber-Sannwald, E., Hughes, F.M., Jadán, O., Jeltsch, F., Jentsch, A., Ju, M., Kaseke, K.F., Kindermann, L., Köbel, M., le Roux, P.C., Liancourt, P., Linstädter, A., Liu, J., Louw, M.A., Maggs-Kölling, G., Issa, O.M., Marais, E., Margerie, P., Messeder, J.V.S., Mora, J.P., Moreno, G., Munson, S.M., Oliva, G., Pueyo, Y., Quiroga, R.E., Reed, S.C., Rey, P.J., Rodríquez, A., Rodríquez, L.B., Rolo, V., Ruppert, J.C., Sala, O., Salah, A., Stavi, I., Stephens, C.R.A., Swemmer, A.M., Teixido, A.L., Thomas, A.D., Throop, H.L., Tielbörger, K., Travers, S.K., van den Brink, L., Wagner, V., Wamiti, W., Wang, D., Wang, L., Wolff, P., Yahdjian, L., Zaady, E., Mastre, F.T. 2024. Drivers of woody dominance across global drylands. Science Advances 10: eadn6007. https://doi.org/10.1126/sciadv.adn6007.
-
Burns, C.E., Collins, S.L., Smith, M.D. 2009. Plant community response to loss of large herbivores: comparing consequences in a South African and a North American grassland. Biodiversity and Conservation 18: 2327–2342. https://doi.org/10.1007/s10531-009-9590-x.
-
Cˇ epelová, B., Münzbergová, Z. 2012. Factors determining the plant species diversity and species composition in a suburban landscape. Landscape and Urban Planning 106: 336–346. https://doi.org/10.1016/j.landurbplan.2012.04.008.
-
Cingolani, A.M., Posse, G., Collantes, M.B. 2005a. Plant functional traits, herbivore selectivity and response to sheep grazing in Patagonian steppe grasslands. Journal of Applied Ecology 42: 50–59. https://doi.org/10.1111/j.1365-2664.2004.00978.x.
-
Cingolani, A.M., Noy-Meir, I., Diaz, S. 2005b. Grazing effects on rangeland diversity: a synthesis of contemporary models. Ecological Applications 15: 757–773. https://doi.org/10.1890/03-5272.
-
Clark, C.M., Tilman, D. 2008. Loss of plant species after chronic low-level nitrogen deposition to prairie grasslands. Nature 451: 712–715. https://doi.org/10.1038/nature06503.
-
Critchley, C.N.R., Chambers, B.J., Fowbert, J.A., Sanderson, R.A., Bhogal, A., Rose, S.C. 2002. Association between lowland grassland plant communities and soil properties. Biological Conservation 105: 199–215. https://doi.org/10.1016/S0006-3207(01)00183-5.
-
Davies, K.W., Copeland, S.M., Bates, J.D. 2022. Grazing effects on shrub-induced resource islands and herbaceous vegetation heterogeneity in sagebrush-steppe communities. Global Ecology and Conservation 35: e02106. https://doi.org/10.1016/j.gecco.2022.e02106.
-
D’Odorico, P., Bhattachan, A., Davis, K.F., Ravi, S., Runyan, C.W. 2013. Global desertification: drivers and feedbacks. Advances in Water Resources 51: 326–344. https://doi.org/10.1016/j.advwatres.2012.01.013.
-
Dobarro, I., Valladares, F., Peco, B. 2010. Light quality and not quantity segregates germination of grazing increasers from decreasers in Mediterranean grasslands. Acta Oecologica 36: 74–79. https://doi.org/10.1016/j.actao.2009.10.005.
-
Dolan, R.W., Stephens, J.D., Moore, M.A. 2015. Changes in plant species composition and structure in two peri-urban nature preserves over 10 years. The American Midland Naturalist 174:33–48. https://doi.org/10.1674/0003-0031-174.1.33.
-
Du, E. 2017. Integrating species composition and leaf nitrogen content to indicate effects of nitrogen deposition. Environmental Pollution 221: 392–397. https://doi.org/10.1016/j.envpol.2016.12.001.
-
Dvorský, M., Mudrák, O., Doležal, J., Jirku˚ , M. 2022. Reintroduction of large herbivores restored plant species richness in abandoned dry temperate grassland. Plant Ecology 223: 525–535. https://doi.org/10.1007/s11258-022-01225-w.
-
Dyson, L.L. 2009. Heavy daily-rainfall characteristics over the Gauteng Province. Water SA 35: 627–638.
-
El-Keblawy, A., Ksiksi, T., El Alqamy, H. 2009 . Camel grazing affects species diversity and community structure in the deserts of the UAE. Journal of Arid Environments 73: 347–354. https://doi.org/10.1016/j.jaridenv.2008.10.004.
-
Fontana, V., Kohler, M., Niedrist, G., Bahn, M., Tappeiner, U., Frenck, G. 2017. Decomposing the land-use specific response of plant functional traits along environmental gradients. Science of the Total Environment 599–600: 750–759. https://doi.org/10.1016/j.scitotenv.2017.04.245.
-
Frank, D.A., Groffman, P.M. 1998. Ungulate vs landscape control of soil C and N processes in grasslands of Yellowstone National Park. Ecology 79: 2229–2241. https://doi.org/10.1890/0012-9658(1998)079[2229:UVLCOS]2.0.CO;2.
-
Frieswyk, C.B., Johnston, C.A., Zedler, J.B. 2007. Identifying and characterizing dominant plants as an indicator of community condition. Journal of Great Lakes Research 33 (Special Issue 3): 125–135. https://doi.org/10.3394/0380-1330(2007)33[125:IACDPA]2.0.CO;2.
-
Gan, L., Peng, X., Peth R., Horn, R. 2012. Effects of grazing intensity on soil thermal properties and heat flux under Leymus chinensis and Stipa grandis vegetation in Inner Mongolia, China. Soil & Tillage Research 118: 147–158. https://doi.org/10.1016/j.still.2011.11.005.
-
Gibon, A. 2005. Managing grassland for production, the environment and the landscape. Challenges at the farm and the landscape level. Livestock Production Science 96: 11–31. https://doi.org/10.1016/j.livprodsci.2005.05.009.
-
Gibson, D.J., Hulbert, L.C. 1987. Effects of fire, topography and year-to-year climatic variation on species composition in tallgrass prairie. Vegetatio 72, 175–185. https://doi.org/10.1007/BF00039839.
-
Harrison, Y.A., Shackleton, C.M. 1999. Resilience of South African communal grazing lands after the removal of high grazing pressure. Land Degradation & Development 10: 225–239. https://doi.org/10.1002/(SICI)1099-145X(199905/06)10:3<225::AID-LDR337>3.0.CO;2-T.
-
He, N.P., Zhang, Y.H., Yu, Q., Chen, Q.S., Pan, Q.M., Zhang, G.M., Han, X.G. 2011. Grazing intensity impacts soil carbon and nitrogen storage of continental steppe. Ecosphere 2: art8. https://doi.org/10.1890/ES10-00017.1.
-
Heinze, J., Bergmann, J., Rillig, M.C., Joshi, J. 2015. Negative biotic soil-effects enhance biodiversity by restricting potentially dominant plant species in grasslands. Perspectives in Plant Ecology, Evolution and Systematics 17: 227–235. https://doi.org/10.1016/j.ppees.2015.03.002.
-
Hejcman, M., Cˇ ešková, M., Schellberg, J., Pätzold, S. 2010. The Rengen Grassland Experiment: Effect of soil chemical properties on biomass production, plant species composition and species richness. Folia Geobotanica 45: 125–142. https://doi.org/10.1007/s12224-010-9062-9.
-
Hickman, K.R., Hartnett, D.C., Cochran, R.C., Owensby, C.E. 2004. Grazing management effects on plant species diversity in tallgrass prairie. Journal of Range Management 57: 58–65. https://doi.org/10.2307/4003955.
-
Hooper, D.U., Vitousek, P.M. 1997. The effects of plant composition and diversity on ecosystem processes. Science 277: 1302–1305. https://doi.org/10.1126/science.277.5330.1302.
-
Huo, J., Liu, C., Yu, X., Chen, L., Zheng, W., Yang, Y., Yin, C. 2020. Direct and indirect effects of rainfall and vegetation coverage on runoff, soil loss, and nutrient loss in a semi-humid climate. Hydrological Processes 35: e13985. https://doi.org/10.1002/hyp.13985.
-
Ingram, L.J., Stahl, P.D., Schuman, G.E., Buyer, J.S., Vance, G.F., Ganjegunte, G.K., Welker, J.M., Derner, J.D. 2008. Grazing impacts on soil carbon and microbial communities in a mixed-grass ecosystem. Soil Science Society of America Journal 72: 939–948. https://doi.org/10.2136/sssaj2007.0038.
-
Kachergis, E., Fernandez-Gimenez, M.E., Rocca, M.E. 2012. Differences in plant species composition as evidence of alternate states in the sagebrush steppe. Rangeland Ecology & Management 65: 486–497. https://doi.org/10.2111/REM-D-11-00137.1.
-
Kent, M. 2012. Vegetation Description and Data Analysis: A Practical Approach. John Wiley & Sons, Chichester.
-
Kottek, M., Grieser, J., Beck, C., Rudolf, B., Rubel, F. 2006. World map of the Köppen-Geiger climate classification updated. Meteorologische Zeitschrift 15: 259–263. https://doi.org/10.1127/0941-2948/2006/0130.
-
Li, B., Wang, L., Kaseke, K.F., Li, L., Seely, M.K. 2016. The impact of rainfall on soil moisture dynamics in a foggy desert. PLoS ONE 11: e0164982. https://doi.org/10.1371/journal.pone.0164982.
-
Little, I.T., Hockey, P.A.R., Jansen, R. 2015. Impacts of fire and grazing management on South Africa’s moist highland grasslands: A case study of the Steenkampsberg Plateau, Mpumalanga, South Africa. Bothalia 45: Art. #1786, 15 pages. https://doi.org/10.4102/abc.v45i1.1786.
-
Maestre, F.T., Le Bagousse-Pinguet, Y., Delgado-Baquerizo, M., Eldridge, D.J., Saiz, H., Berdugo, M., Gozalo, B., Ochoa, V., Guirado, E., García-Gómez, M., Valencia, E., Gaitán, J.J., Asensio, S., Mendoza, B.J., Plaza, C., Díaz-Martínez, P., Rey, A., Hu, H-W., He, J-Z., Wang, J-T., Lehmann, A., Rillig, M.C., Cesarz, S., Eisenhauer, N., Martínez-Valderrama, J., Moreno-Jiménez, E., Sala, O., Abedi, M., Ahmadian, N., Alados, C.L., Aramayo, V., Amghar, F., Arredondo, T., Ahumada, R.J., Bahalkeh, K., Salem, F.B., Blaum, N., Boldgiv, B., Bowker M.A., Bran, D., Bu, C., Canessa, R., Castillo-Monroy, A.P., Castro, H., Castro, I., Castro-Quezada, P., Chibani, R., Conceição, A.A., Currier, C.M., Darrouzet-Nardi, A., Deák, B., Donoso, D.A., Dougill, A.J., Durán, J., Erdenetsetseg, B., Espinosa, C.I., Fajardo, A., Farzam, M., Ferrante, D., Frank, A.S.K., Fraser, L.H., Gherardi, L.A., Greenville, A.C., Guerra, C.A., Gusmán-Montalván, E., Hernandéz-Hernandéz, R.M., Hölzel, N., Huber-Sannwald, E., Hughes, F.M., Jadán-Maza, O., Jeltsch, F., Jentsch, A., Kaseke, K.F., Köbel, M., Koopman, J.E., Leder, C.V., Linstädter, A., le Roux, P.C., Li, X., Liancourt, P., Liu, J., Louw, M.A., Maggs-Kölling, G., Makhalanyane, T.P., Issa, O.M., Manzaneda, A.J., Marais, E., Mora, J.P., Moreno, G., Munson, S.M., Nunes, A., Oliva, G., Oñatibia, G.R., Peter, G., Pivari, M.O.D., Pueyo, Y., Quiroga, R.E., Rahmanian, S., Reed, S.C., Rey, P.J., Richard, B., Rodríquez, A., Rolo, V., Rubalcaba, J.G., Ruppert, J.C., Salah, A., Schuchardt, M.A., Spann, S., Stavi, I., Stephens, C.R.A., Swemmer, A.M., Teixido, A.L., Thomas, A.D., Throop, H.L., Tielbörger, K., Travers, S., Val, J., Valkó, O., van den Brink, L., Ayuso, S.V., Velbert, F., Wamiti, W., Wang, D., Wang, L., Wardle, G.M., Yahdjian, L., Zaady, E., Zhang, Y., Zhou, X., Singh, B.K., Gross, N. 2022. Grazing and ecosystem service delivery in global drylands. Science 378: 915–920. https://doi.org/10.1126/science.abq4062.
-
Magurran, A.E. 2010. Measuring Biological Diversity. Blackwell Publishing, United Kingdom.
-
Mayel, S., Jarrah, M., Kuka, K. 2021. How does grassland management affect physical and biochemical properties of temperate grassland soils? A review study. Grass and Forage Science 76: 215–244. https://doi.org/10.1111/gfs.12512.
-
Milchunas, D.G., Lauenroth, W.K. 1993. Quantitative effects of grazing on vegetation and soils over a global range of environments. Ecological Monographs 63: 327–366. https://doi.org/10.2307/2937150.
-
Milchunas, D.G., Lauenroth, W.K., Burke, I.C. 1998. Livestock grazing: animal and plant biodiversity of shortgrass steppe and the relationship to ecosystem function. Oikos 83: 65–74. https://doi.org/10.2307.3546547.
-
Milchunas, D.G., Noy-Meir, I. 2004. Geologic grazing refuges and grassland diversity: A shortgrass steppe study. Journal of Range Management 57: 141–147. https://doi.org/10.2111/1551-5028(2004)057[0141:GGRAGD]2.0.CO;2.
-
Mota, G.S., Luz, G.R., Mota, N.M., Coutinho, E.S., Veloso, M.D.M., Fernandes, G.W., Nunes, Y.R.F. 2018. Changes in species composition, vegetation structure, and life forms along an altitudinal gradient of rupestrian grasslands in south-eastern Brazil. Flora 238: 32–42. https://doi.org/10.1016/j.flora.2017.03.010.
-
Mucina, L., Rutherford, M.C. (eds.). 2006. The Vegetation of South Africa, Lesotho and Swaziland. Steritzia 19, South African National Biodiversity Institute, Pretoria.
-
O’Connor, T.G. 1985. A Synthesis of Field Experiments Concerning the Grass Layer in the Savanna Regions of Southern Africa. South African National Scientific Programme Report 114: 1–126.
-
Osem, Y., Perevolotsky, A., Kigel, J. 2004. Site productivity and plant size explain the response of annual species to grazing exclusion in a Mediterranean semi-arid rangeland. Journal of Ecology 92: 297–309. https://doi.org/10.1111/j.0022-0477.2004.00859.x.
-
Owen-Smith, N. 1999. The Animal Factor in Veld Management. In: N.M. Tainton, (ed.). Veld Management in South Africa. University of Natal Press, Pietermaritzburg, pp. 117–138.
-
Parsons, D.A.B., Shackleton, C.M., Scholes, R.J. 1997. Changes in herbaceous layer condition under contrasting land use systems in the semi-arid lowveld, South Africa. Journal of Arid Environments 37: 319–329. https://doi.org/10.1006/jare.1997.0283.
-
Ramos, M.C., Lizaga, I., Gaspar, L., Quijano, L., Navas, A. 2019. Effects of rainfall intensity and slope on sediment, nitrogen and phosphorous losses in soils with different use and soil hydrological properties. Agricultural Water Management 226: 105789. https://doi.org/10.1016/j.agwat.2019.105789.
-
Ritchie, M.E., Olff, H. 1999. Herbivore Diversity and Plant Dynamics: Compensatory and Additive Effects. In: H. Olff, V.K. Brown & R.H. Drent (eds.). Herbivores: Between Plants and Predators, The 38th Symposium of the British Ecological Society. Blackwell Science, Oxford, pp. 175–204.
-
Rudmann-Maurer, K., Weyand, A., Fischer, M., Stöcklin, J. 2008. The role of landuse and natural determinants for grassland vegetation composition in the Swiss Alps. Basic and Applied Ecology 9: 494–503. https://doi.org/10.1016/j.baae.2007.08.005.
-
Schulze, R.E. 1997. South African Atlas of Agrohydrology and Climatology. Water Research Commission, Pretoria, Report TT82/9.
-
Schuman, G.E., Reeder, J.D., Manley, J.T., Hart, R.H., Manley, W.A. 1999. Impact of grazing management on the carbon and nitrogen balance of a mixed-grass rangeland. Ecological Applications 9: 65–71. https://doi.org/10.1890/1051-0761(1999)009[0065:IOGMOT]2.0.CO;2.
-
Smet, M., Ward, D. 2005. A comparison of the effects of different rangeland management systems on plant species composition, diversity and vegetation structure in a semi-arid savanna. African Journal of Range & Forage Science 22: 59–71. https://doi.org/10.2989/10220110509485862.
-
South African National Biodiversity Institute. 2013. Grasslands Ecosystem Guidelines: Landscape Interpretation for Planners and Managers. Compiled by M. Cadman, C. deVilliers, R. Lechmere-Oertel, and D. McCulloch. South African National Biodiversity Institute, Pretoria.
-
South African National Biodiversity Institute. 2014. Grazing and Burning Guidelines: Managing Grasslands for Biodiversity and Livestock Production. Compiled by R.G. Lechmere-Oertel. South African National Biodiversity Institute, Pretoria.
-
Stohlgren, T.J. 2007. Measuring Plant Diversity: Lessons from the Field. Oxford University Press, New York.
-
Stohlgren, T.J., Falkner, M.B., Schell, L.D. 1995. A Modified-Whittaker nested vegetation sampling method. Vegetatio 117: 113–121. https://doi.org/10.1007/BF00045503.
-
Stohlgren, T.J., Schell, L.D., Heuvel, B.V. 1999. How grazing and soil quality affect native and exotic plant diversity in rocky mountain grasslands. Ecological Applications 9: 45–64. https://doi.org/10.1890/1051-0761(1999)009[0045:HGASQA]2.0.CO;2.
-
Swacha, G., Botta-Dukát, Z., Kacki, Z., Pruchniewicz, D., Z˙ ołnierz, L. 2018. The effect of abandonment on vegetation composition and soil properties in Molinion meadows (SW Poland). PLoS ONE 13: e0197363. https://doi.org/10.1371/journal.pone.0197363.
-
ter Braak C.J.F., Šmilauer P. 2002. CANOCO Reference Manual and CanoDraw for Windows User’s Guide: Software for Canonical Community Ordination (version 4.5). Microcomputer Power, Ithaca, New York.
-
Tilman, D. 1999. The ecological consequences of changes in biodiversity: A search for general principles. Ecology 80: 1455–1474. https://doi.org/10.1890/0012-9658(1999)080[1455:TECOCI]2.0.CO;2.
-
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. https://doi.org/10.1126/science.277.5330.1300.
-
Van der Maarel, E. 2005. Vegetation Ecology. Blackwell, Oxford.
-
Van Oudtshoorn, F. 2015. Veld Management: Principles and Practices. Briza Publications, Pretoria.
-
Veblen, K.E., Porensky, L.M., Riginos, C., Young, T.P. 2016. Are cattle surrogate wildlife? Savanna plant community composition explained by total herbivory more than herbivore type. Ecological Applications 26: 1610–1623. https://doi.org/10.1890/15-1367.1.
-
Verberk, W. 2011. Explaining general patterns in species abundance and distributions. Nature Education Knowledge 3: 38.
-
Yao, Y., Dai, Q., Gao, R., Gan, Y., Yi. X. 2021. Effects of rainfall intensity on runoff and nutrient loss of gently sloping farmland in a karst area of SW China. PLoS ONE 16: e0246505. https://doi.org/10.1371/journal.pone.0246505.
-
Waite, S. 2000. Statistical Ecology in Practice: A Guide to Analysing Environmental and Ecological Field Data. Pearson Education Limited, Essex.
-
Wedin, D.A., Tilman, D. 1990. Species effects on nitrogen cycling: a test with perennial grasses. Oecologia 84: 433–441. https://doi.org/10.1007/BF00328157.
-
Wu, J., Shen, Z., Shi, P., Zhou, Y. & Zhang, X. 2014. Effects of grazing exclusion on plant functional group diversity of alpine grasslands along a precipitation gradient on the Northern Tibetan Plateau. Arctic, Antarctic, and Alpine Research 46: 419–429. https://doi.org/10.1657/1938-4246-46.2.419.
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Factors influencing vegetation composition in grasslands under contrasting land use in Gauteng Province, South Africa
In: Israel Journal of Ecology and EvolutionSearch for other papers by Moseketsi V. Mochesane in
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Search for other papers by Mamokete N.V. Dingaan in
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PubMed
Abstract
Plant species composition is crucial for ecosystem functioning because it influences both ecosystem stability and productivity. Plant species composition is affected by abiotic factors such as environmental moisture and soil properties, as well as biotic influences related to land use and management, which include herbivore grazing. The objective of this study was to compare vegetation structure and composition between protected and adjacent unprotected areas in Gauteng Province, South Africa. Vegetation surveys were conducted at Abe Bailey Nature Reserve (ANR), Roodeplaat Dam Nature Reserve (RNR), and Suikerbosrand Nature Reserve (SNR). Three sites within each nature reserve were paired with adjacent unprotected sites, where species composition and soil chemical properties were determined in Modified-Whittaker plots (MWPs). Plant species were recorded in 18 MWP plots of 1000m2 area, and also species cover, density, and growth forms were recorded in 180 subplots of 1m2 area. We determined similarity in species composition between paired sites using the Jaccard and Sørensen similarity indices, as well as the Bray-Curtis dissimilarity index. We further assessed variations in species composition between study locations and their relations with soil properties using Detrended Correspondence Analysis and Canonical Correspondence Analysis. There was low species composition similarity between the two land use types, but between locations, the ANR and SNR sites showed the most similarity in species composition. The soil variables differed significantly at some paired sites and also between locations. In general, the results indicated a strong association between species composition and environmental factors, specifically soil properties and herbivore grazing intensity.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 130 | 130 | 18 |
| Full Text Views | 2 | 2 | 1 |
| PDF Views & Downloads | 9 | 9 | 6 |
