Floristic composition and environmental factors that characterize some grasslands in the Danube Delta area
Keywords:
Danube Delta, floristic composition, grasslands, environmental variablesAbstract
The study investigated the floristic composition of 12 pasture areas in the Danube Delta, and their neighbouring regions, and the relationships between the floristic composition and the environmental variables. The vegetation analysis was carried out based on the mean percentage values corresponding to the scale developed by the Braun-Blanquet. For the syntaxonomic assignment, 50 phytocoenological relevés were made. The relevés were analyzed using Agglomerative Hierarchical Clustering (flexible β algorithm and Bray-Curtis dissimilarity). The relationship between floristic composition and environmental variables was assessed using Detrended Correspondence Analysis (DCA) and Canonical Correlation Analysis (CCA) in CANOCO. Our results showed that the analyzed species are mostly mesoxerophilic, oligo-mesotrophic, and poorly exploited as fodder, with moderate tolerance to grazing and medium anthropogenic influence, predominantly urbanophobic. Numerical analysis identified eight well-defined communities, which correspond to associations described in the taxonomic literature, based on their diagnostic species. The predominant plant association is Hordeo murini-Cynodontetum dactyloni. The variation of the floristic composition is influenced by annual precipitation.
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Adar, S., Sternberg, M., Argaman, E., Henkin, Z., Dovrat, G., Zaady, E. & Paz-Kagan, T. (2023). Testing a novel pasture quality index using remote sensing tools in semiarid and Mediterranean grasslands. Agriculture, Ecosystems & Environment, 357, 108674.
Anamo, A., Mammo, S. & Temesgen, M. (2023). Floristic composition and community analysis of woody species in Hereje Natural Forest, southwest Ethiopia. SN Applied Sciences, 5(1), 48.
Ashton, D., Porter, S., Downie, N., Linsley, T. & Entriken, W. (2016). Radarchart: Radar chart from ‘Chart.js’. https://CRAN.R-project.org/package=radarchart.
Balyan, R. S. & Malik, R. K. (2000). Competitive ability of winter wheat cultivars with wild oat (Avena ludoviciana). Weed Science, 48(4), 610-614.
Begon, M., Townsend, C. R. & Harper, J. L. (2006). Ecology: From individuals to ecosystems. Blackwell Publishing.
Birhanu, L., Bekele, T., Tesfaw, B. & Demissew, S. (2021). Relationships between topographic factors, soil and plant communities in a dry Afromontane forest patches of Northwestern Ethiopia. PloS one, 16(3), e0247966.
Borza, A. & Boşcaiu, N. (1965). Introducere în studiul covorului vegetal (Introduction to the study of the plant carpet) [in Romanian]. Academia Republicii Populare Române.
Bouxin, G. (2005). Ginkgo, a multivariate analysis package. Journal of Vegetation Science, 16, 355–359. https://doi.org/10.1111/j.1654-1103.2005.tb02374.x
Braun-Blanquet, J. (1964). Pflanzensoziologie. Grundzüge der Vegetationskunde. Springer.
Briemle, G. & Ellenberg, H. (1994). Zur Mahdverträglichkeit von Grünlandpflanzen – Möglichkeiten der praktischen Anwendung von Zeigerwerten. Natur und Landschaft, 69, 139-147.
Briemle, G. (1996). Farbatlas Kräuter und Gräser in Feld und Wald, Stuttgart (Hohenheim): Ulmer, ISBN 3-8001-4125-6.
Briemle, G., Nitsche, S. & Nitsche, L. (2002). Nutzungswertzahlen für Gefäßpflanzen des Grünlandes. Schriftenreihe für Vegetationskunde, 38, 203-225.
Calota, A. M. & Patru-Stupariu, I. (2019). Pasture resilience towards landscape changes: Assessing pastures quality in the context of land-use and land-cover changes in Romania. European Journal of Geography, 10(2).
Carreira, E., Serrano, J., Lopes de Castro, J., Shahidian, S. & Pereira, A. F. (2023). Montado mediterranean ecosystem (Soil–Pasture–Tree and animals): a review of monitoring technologies and grazing systems. Applied Sciences, 13(10), 6242.
Chifu, T., Irimia, I. & Zamfirescu, O. (2014). Diversitatea fitosociologică a vegetaţiei României. II. Vegetația erbacee antropizată. A. Vegetația pajiștilor (The phytosociological diversity of Romania's vegetation. II. Anthropogenic herbaceous vegetation. A. Grassland vegetation) [in Romanian]. Institutul European 659 pp.
Chirilă, S. D., Răileanu, Ș., David, L. O., Covaliov, S. & Doroftei, M. (2024). An analysis of plant palatability on pastures of the delta: Case study, Danube Delta area, Romania. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 52(1), 13568-13568.
Chytrý, M., Tichý, L., Hennekens, S.M. .... & Schaminée, J.H.J. (2020). EUNIS Habitat Classification: expert system, characteristic species combinations, and distribution maps of European habitats. Applied Vegetation Science, 23, 648–675.
Covaliov, S. (2023). Resurse vegetale. In: Lupu, G. (2023). Cercetări privind conservarea biodiversității, habitatelor, speciile invazive (non-native), exploatarea sustenabilă a resurselor naturale și implicațiile socio-economice din Rezervația Biosferei Delta Dunării, în contextul schimbărilor climatice, 230 pagini. Raport Faza 4 / decembrie / 2023, al proiectului nr. PN 23 13 01 03 al contractului nr. 35N/2023/MCI, executant: INCDDD - Tulcea. Tulcea, România.
Cristea, V., Gafta, D. & Pedrotti, F. (2004). Fitosociologie (Phytosociology) [in Romanian]. Editura Presa Universitară Clujeană.
Cui, S., Xiao, Y., Zhou, Y., Wu, P., Cui, L. & Zheng, G. (2023). Variations in diversity, composition, and species interactions of soil microbial community in response to increased N deposition and precipitation intensity in a temperate grassland. Ecological Processes, 12(1), 35.
de Bello, F., Lepš, J. & Sebastià, M. T. (2007). Grazing effects on the species‐area relationship: Variation along a climatic gradient in NE Spain. Journal of Vegetation Science, 18(1), 25-34. https://doi.org/10.1111/j.1654-1103.2007.tb02512.x
de Cáceres, M. & Legendre, P. (2009). Associations between species and groups of sites: indices and statistical inference. Ecology, 90, 3566–3574. https://doi.org/10.1890/08-1823.1
Decision no. 78/2015. Decision no. 78/2015 regarding the modification and completion of the Methodological Norms for the application of the provisions of the Government Emergency Ordinance no. 34/2013 regarding the organization, administration and exploitation of permanent meadows and for the amendment and completion of the Land Fund Law no. 18/1991, approved by Government Decision no. 1.064/2013. Data from: https://lege5.ro/Gratuit/gu3dinrwgm/hotararea-nr-78-2015-privind-modificarea-si-completarea-normelor-metodologice-pentru-aplicarea-prevederilor-ordonantei-de-urgenta-a-guvernului-nr-34-2013-privind-organizarea-administrarea-si-exploatar?pid=74842424#google_vignette. [accessed 2024 July 25].
Dregne, H. E. (2002). Land degradation in the drylands. Arid land research and management, 16(2), 99-132.
Dufrêne, M. & Legendre, P. (1997). Species assemblages and indicator species: the need for a flexible assymmetrical approach. Ecological Monographs 67, 345–366. https://doi.org/10.1890/0012-9615(1997)067[0345:SAAIST]2.0.CO;2
Ellenberg, H., Weber, H.E., Düll, R., Wirth, V., Werner, W. & Paulissen, D. (1992). Zeigerwerte von Pflanzen in Mitteleuropa. Scripta Geobotanica, 18, 1–258.
EURO+MED (2024). Euro+Med PlantBase is the information resource for Euro-Mediterranean plant diversity. Data from: http://ww2.bgbm.org/EuroPlusMed [accessed 2023 December 8].
Fick, S.E. & Hijmans, R.J. (2017). Worldclim 2: New 1-km spatial resolution climate surfaces for global land areas. International Journal of Climatology, 37, 14.
Florea, N. & Munteanu, I. (2003). Romanian Soil Taxonomy System (SRTS), ICPA, Est-falia Publishing House, Bucharest, 182 p.
Frank, A. B. & Ries, R. E. (1990). Effect of soil water, nitrogen, and growing degree-days on morphological development of crested and western wheatgrass. Rangeland Ecology & Management/Journal of Range Management Archives, 43(3), 257-260.
García, S., Guido, A., Pezzani, F. & Lattanzi, F. A. (2023). Invasion strategies of Cynodon dactylon: Competitive ability under low‐nutrient conditions. Austral Ecology, 48(6), 1107-1120.
Guretzky, J. A., Moore, K. J., Brummer, E. C. & Burras, C. L. (2005). Species diversity and functional composition of pastures that vary in landscape position and grazing management. Crop Science, 45(1), 282-289.
Hussein, E. A., Abd El-Ghani, M.M., Hamdy, R.S. & Shalabi, L. F. (2021). Do anthropogenic activities affect floristic diversity and vegetation structure more than natural soil properties in hyper-arid desert environments? Diversity, 13(4), 157.
Inkscape 1.2.2 (732a01da63, 2022-12-09). Data from: https://inkscape.org/. Accessed on 20 June 2023.
ISO 11263 (1994). Determination of phosphorus - Spectrometric determination of phosphorus soluble in sodium hydrogen carbonate solution. Data from: https://www.iso.org/standard/19241.html. [accessed 2023 October 11].
Klapp, E., Boeker, P., König, F. & Stählin, A. (1953). Wartzahlen der Grünlandpflanzen. Das Gründland, 2, 38-42.
Klimek, S., Hofmann, M. & Isselstein, J. (2007). Plant species richness and composition in managed grasslands: the relative importance of field management and environmental factors. Biological conservation, 134(4), 559-570.
Klotz, S. & Kühn, I. (2002). Indikatoren des anthropogenen Einflusses auf die Vegetation. Schriftenreihe für Vegetationskunde, 38, 241-246.
Kochánková, J. & Mandák, B. (2008). Biological flora of Central Europe: Atriplex tatarica L. Perspectives in Plant Ecology, Evolution and Systematics, 10(4), 217-229.
Körner, C. (2007). The use of 'altitude' in ecological research. Trends in Ecology & Evolution, 22(11), 569-574.
Lambers, H., Chapin III, F. S. & Pons, T. L. (2008). Plant Physiological Ecology. Springer New York.
Lazarina, M., Charalampopoulos, A., Psaralexi, M., Krigas, N., Michailidou, D. E., Kallimanis, A. S. & Sgardelis, S. P. (2019). Diversity patterns of different life forms of plants along an elevational gradient in Crete, Greece. Diversity, 11(10), 200.
Legendre, P. & Legendre, L (1998). Numerical ecology. Second English edition. Elsevier, Amsterdam, The Netherlands.
Mucina, L., Bültmann, H., Dierßen, K.......... Tichý, L. (2016). Vegetation of Europe: hierarchical floristic classification system of vascular plant, bryophyte, lichen and algal communities. Applied Vegetation Science, 19, 3-264.
Nakahama, N., Hirasawa, Y., Minato, T., Hasegawa, M., Isagi, Y. & Shiga, T. (2015). Recovery of genetic diversity in threatened plants through use of germinated seeds from herbarium specimens. Plant Ecology, 216, 1635-1647.
Păcurar, F. & Rotar, I., (2014). Metode de studiu și interpretare a vegetației pajiștilor, Editura Risoprint, Cluj Napoca, România, 225 p.
QGIS Development Team (2022). QGIS version 3.28. Data from: https://qgis.org, [accessed 2024 June 29].
Qin, G.X., Wu, J., Li, C.B., Qin, A.N. & Yao, X.Q. (2019). Grassland vegetation phenology change and its response to climate changes in North China. Chinese Journal of Applied Ecology, 30(12), 4099–4107. https://doi.org/10.13287/j.1001-9332.201912.015.
Rahbek, C. (1995). The elevational gradient of species richness: a uniform pattern? Ecography, 18(2), 200-205.
Rewilding Europe (2021). Rewilding in Action: How Natural Grazing Affects Vegetation in the Danube Delta. URL: https://rewilding-danube-delta.com/news/rewilding-in-action-how-natural-grazing-affects-vegetation-in-the-danube-delta/.
Rousseeuw, P.J. (1987). Silhouettes: a Graphical Aid to the Interpretation and Validation of Cluster Analysis. Journal of Computational and Applied Mathematics, 20, 53–65.
RStudio Team (2024). RStudio: Integrated Development for R. RStudio, PBC, Boston, MA. Data from: http://www.rstudio.com/. [accessed 2024 June 29].
Sewale, B. & Mammo, S. (2022). Analysis of floristic composition and plant community types in Kenech Natural Forest, Kaffa Zone, Ethiopia. Trees, Forests and People, 7, 100170.
Shi, H., Wang, Y., Cheng, Z., Ye, T. & Chan, Z. (2012). Analysis of natural variation in bermudagrass (Cynodon dactylon) reveals physiological responses underlying drought tolerance. PLoS One, 7(12), e53422.
Sosnowski, J. & Solka, K. M. (2019). Floristic composition of selected lowland meadows in the liw commune. Journal of Ecological Engineering, 20(2).
SR ISO 10390 (1998). Soil, treated biowaste and sludge – Determination of pH.
SR ISO 10694 (1998). Soil quality - Determination of organic and total carbon after dry combustion (elementary analysis)
STAS 7184/21-82. Determination of humus content
Strat, D. (2016). Floristic composition and functional zones pattern of the beach-dune system along the Danube Delta coast-Romania. In Forum geografic, 15, 1.
ter Braak, C. J. F. & Šmilauer, P. (2018). Canoco reference manual and user's guide: Software for ordination (version 5.10). Ithaca, USA: Microcomputer Power. Data from: http://www.microcomputerpower.com/. [accessed 2024 June 27].
Tichý, L. (2002). JUICE, software for vegetation classification. Journal of Vegetation Science, 13, 451–453.
Tilman, D., Wedin, D. & Knops, J. (2001). Productivity and sustainability influenced by biodiversity in grassland ecosystems. Nature, 379(6567), 718-720.
Xu, X., Du, H., Fan, W., Hu, J., Mao, F. & Dong, H. (2019). Long-term trend in vegetation gross primary production, phenology and their relationships inferred from the FLUXNET data. Journal of Environmental Management, 246, 605–616. https://doi.org/10.1016/j.jenvman.2019.06.023.
Xu, Y., Yang, J. & Chen, Y.N. (2016). NDVI-based vegetation responses to climate change in an arid area of China. Theoretical and Applied Climatology, 126, 213–222. https://doi.org/10.1007/s00704-015-1572-1
Zelnik, I. & Čarni, A. (2013). Plant species diversity and composition of wet grasslands in relation to environmental factors. Biodiversity and Conservation, 22, 2179-2192.
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