Evaluation of disturbance and spatial attribute on regeneration using structural equation modeling (Case study: Khyrud forest- Nowshahr)

Document Type : Research article

Authors

1 Assistant Prof., Department of Environmental Engineering, Faculty of Natural Resources, University of Zabol, Zabol, Iran

2 Prof., Department of Environmental Engineering, Faculty of Natural Resources, University of Tehran, Karaj, Iran

3 Associate Prof., Faculty of Fisheries and environmental Sciences, Gorgan Agricultural Sciences and Natural Resources University, Gorgan, Iran

4 Associate Prof., Department of Forestry and Forest Economic, Faculty of Natural Resources, University of Tehran, Iran

Abstract

Effects of anthropogenic disturbances through livestock grazing, wood harvesting, and direct utilization by local people plus spatial heterogeneity on the regeneration of forest tree species and forest health have been recognized worldwide. In this research, effects of disturbances and site features (Aspect, slope percent, altitude, and soil) were investigated on tree species regeneration in Khyrud forest-Nowshahr, north of Iran. Indicators pertaining to saplings, large sapling and trees were measured in 100 plots, 10 m2 each, for disturbance and spatial constructs of Structural Equation Modeling- Partial Least Squares method. Results showed disturbance has a significant (α = 0.01) effect on regeneration. Effects of sapling on large sapling and large sapling on tree constructs were significant (α = 0.01), too. The moderating effect of spatial construct on disturbance to sapling path (α = 0.01) and disturbance to large sapling path (α = 0.05) was significant. We conclude that disturbance and spatial attributes have high influence on sapling and large sapling in the study area, respectively which affect trees indirectly.

Keywords

References

- Anonymous, 1982. Forest Management Plan, Namkhane District of Kheyrud. Faculty of Natural Resources, University of Tehran, Karaj, 156p (In Persian).
- Anonymous, 1984. First Revision of Forest Management Plan, Patom District of Kheyrud. Faculty of Natural Resources, University of Tehran, Karaj, 165p (In Persian).
- Anonymous, 1995a. First Revision of Forest Management Plan, Namkhane District of Kheyrud. Faculty of Natural Resources, University of Tehran, Karaj, 205p (In Persian).
- Anonymous, 1995b. Second Revision of Forest Management Plan, Patom District of Kheyrud. Faculty of Natural Resources, University of Tehran, Karaj, 296p (In Persian).
- Anonymous, 2011. Forest Inventory and Analysis (FIA), Phase 3 Field Guide- Vegetation Diversity and Structure, Version 5.1. American Forest Service, Washington, 27p.
- Anonymous, 2013. Second Revision of Forest Management Plan, Namkhane District of Kheyrud. Faculty of Natural Resources, University of Tehran, Karaj, 205p (In Persian).
- Asli, A. and H. Eter, 1969. Forest management plan of Patom district in educational and research forest of Tehran University (Kheyrud forest). Publishing and Printing Institute, Tehran 120p (In Persian).
- Bailey, R.G., 2009. Ecosystem Geography. Springer, Second Edition, New York, 256p.
- Bottero, A., Garbarino, M., Long, J.N. and Motta, R., 2013. The interacting ecological effects of large-scale disturbances and salvage logging on montane spruce forest regeneration in the western European Alps. Forest Ecology and Management, 292: 19-28.
- Buffum, B., Gratzer, G. and Tenzin, Y., 2009. Forest grazing and natural regeneration in a late successional broadleaved community forest in Bhutan. Mountain Research and Development, 29(1): 30-35.
- Busing, R. and Mailly, D., 2004. Advances in spatial, individual-based modeling of forest dynamics. Journal of Vegetation Science, 15: 831-842.
- Chauhan, D.S., Dhanai, C.S., Singh, B., Chauhan, S., Todaria, N.P. and Khalid, M.A., 2008. Regeneration and tree diversity in natural and planted forests in a Terai-Bhabhar forest in Katarniaghat Wildlife Sanctuary, India. Tropical Ecology, 49(1): 53-67.
- Cierjacks, A., Katrin, N., Wesche, K. and Hensen, I., 2008. Effects of altitude and livestock on the regeneration of two tree line forming Polylepis species in Ecuador. Plant Ecology, 194: 207-221.
- Davari, A. and Rezazadeh, A., 2014. Structural Equation Modeling with PLS. Iranian Student Book Agency, Tehran, 240p (In Persian).
- Drobyshev, I.V., 1999.  Regeneration of Norway spruce in canopy gaps in Sphagnum Myrtillus old-growth forests. Forest Ecology and Management, 115: 71-83.
- Endara Agramont, A.R., Maass, S.F., Bernal, G.N., Valdez Hernández, J.I. and Fredericksen, T.S., 2012. Effect of human disturbance on the structure and regeneration of forests in the Nevado de Toluca National Park, Mexico. Journal of Forestry Research, 23(1): 39-44.
- Etemad, V., 2006. Social- economic studies on watershed 46 and part of watershed 45. Report, University of Tehran, Karaj, 220p (In Persian).
- Fei, Y., De-xiang, W., Xiao-xiao, S., Xian-feng, Y., Qing-ping, H. and You-ning, H., 2013. Effects of environmental factors on tree seedling regeneration in a pine-oak mixed forest in the Qinling Mountains, China. Journal of Mountain Science, 10(5): 845-853.
- Gea-Izquierdo, G., Pastur, G.M., Cellini, J.M. and Lencinas, M.V., 2004. Forty years of silvicultural management in southern Nothofagus pumilio primary forests. Forest Ecology and Management, 201: 335-347.
- Gebrehiwot, M., 2003. Assessment of natural regeneration diversity and distribution of forest tree species. M.Sc. thesis, International Institute for Geo- Information Science and Earth Observation Enschede, Overijssel, The Netherlands, 92p.
- Hair, J.F., Hult, G.T.M., Ringle, C.M. and Sarstedt, M., 2014. A Primer on Partial Least Squares Structural Equation Modeling (PLS-SEM). Sage Publication Inc, Los Angeles, 307p.
- Hammond, E.H., 1954. Small-scale continental landform maps. Annals Association of American Geographers, 44: 33-42.
- Hassannejhad Sadat Mahale, S. and Hassanzadeh Narverdi, E., 2015. Comparison of quantitative and qualitative characteristics in managed and unmanaged natural forest stands at district 7- Shenrood (Siahkal). Journal of Plant Researches, 1(1): 33-42 (In Persian).
- Kakavand, M., Marvi Mohajer, M.R., Sagheb Talebi, Kh. and Sefidi, K., 2015. Structure and composition ‎of oriental beech stands in the middle stage of ecological succession in the Hyrcanain region. Journal of Forest and Wood Products (Iranian Journal of Natural Resources), 68(1): 31-45 (In Persian).
- Pastur, G.M., Esteban, R.S., Pulido, F. and Lencinas, M.V., 2013. Variable retention harvesting influences biotic and abiotic drivers of regeneration in Nothofagus pumilio southern Patagonian forests. Forest Ecology and Management, 289: 106-114.
- Mahdavi, A., Eshaghi Rad, J. and Banj Shafie, A., 2010. Natural regeneration of oak (Quercus brantii) and other woody species in rerated to environmental factors (physiography and soil). Natural Ecosystems of Iran, 1: 33-42 (In Persian).
- Marvie Mohadjer, M.R., 2012. Silviculture. University of Tehran Press, Tehran, 380p (In Persian).
- Mori, A. and Takeda, H., 2004. Effects of undisturbed canopy structure on population structure and species coexistence of an old-growth subalpine forest in central Japan. Forest Ecology and Management, 200: 89-100.
- Neily, P.D., Quigley, E., Benjamin, L., Stewart, B. and Duke, T., 2003. Ecological land classification for Nova Scotia, Volume 1 - Mapping Nova Scotia’s Terrestrial Ecosystems. Nova Scotia Department of Natural Resources, Renewable Resources Branch, Nova Scotia, 75p.
- Pulido, F. and Díaz, M., 2005. Regeneration of Mediterranean oak: a whole-cycle approach. Ecoscience, 12: 92-102.
- Rebertus, A. and Veblen, T.V., 1993. Structure and tree-fall gap dynamics of old-growth Nothofagus forests in Tierra del Fuego, Argentina. Journal of Vegetation Science, 4: 641-654.
- Sarmadiyan, M. and Jafari, M., 2001. Investigation on forest soil at educational and research forest of Faculty of Natural Resources of the University of Tehran (Kheyrud Kenar- Nowshahr). Iranian Journal of Natural Resources, Special Issue, 112p (In Persian).
- Soriano, M., Kainer, K.A., Staudhammer, C., Marlene Soriano, E.S., Kainer, K.A., Staudhammer, C. and Soriano, E., 2012.  Implementing multiple forest management in Brazil nut-rich community forests: Effects of logging on natural regeneration and forest disturbance. Forest Ecology and Management, 268: 92-102.
- Sturtevant, B.R., Miranda, B.R., Wolter, P.T., James, P.M.A., Fortin, M.J. and Townsend, P.A., 2014. Forest recovery patterns in response to divergent disturbance regimes in the Border Lakes region of Minnesota (USA) and Ontario (Canada). Forest Ecology and Management, 313: 199-21.
- Torres, R.C., Renison, D., Hensen, I., Suarez, R. and Enrico, L., 2008. Polylepis australis’ regeneration niche in relation to seed dispersal, site characteristics and livestock density. Forest Ecology and Management, 254: 255-260.
- Wassie, A., Sterck, F.J., Teketay, D. and Bongers, F., 2009. Effects of livestock exclusion on tree regeneration in church forests of Ethiopia. Forest Ecology and Management, 257(3): 765-772.
Iranian Journal of Forest and Poplar Research
Volume 25, Issue 4 - Serial Number 70
January 2019
Pages 563-573

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