Spatial heterogeneity of soil seed banks in sandy grasslands under fencing and grazing in Horqin sandland, Northern China

• Autorzy: Zuo X. , Zhao X. , Zhao H. , Zhang T. , Wang S. , Knops J. , Kochsiek A.
• Języki publikacji: EN

Abstrakty

EN

Understanding composition, structure and spatial heterogeneity in soil seed banks is important for the management of grassland ecosystem. Although the effect of fencing and grazing on vegetation composition is widely known, information on species composition, seed density and spatial heterogeneity of soil seed banks in sandy grasslands under fencing and grazing is still lacking. We measured the species composition and seed density of soil seed banks in fenced grassland, grazed grassland and grazed shrubby grassland in Horqin Sand Land, Northern China. By applying the geostatistical methods, we assessed how fencing and grazing affected spatial heterogeneity of soil seed banks in sandy grasslands. Total seed density and species richness in soil seed banks were lower in fenced grassland than in either grazed grassland or grazed shrubby grassland. Seed density and species richness of annual species in soil seed banks were also lower in fenced grassland than in either grazed grassland or grazed shrubby grassland, while those of perennial species showed a reverse trend. The analysis of spatial autocorrelation ranges, fractal dimensions and distribution pattern maps from geostatistical methods showed that spatial heterogeneity of seed density and species richness in soil seed banks were also lower in fenced grassland than in either grazed grassland or grazed shrubby grassland. Continuous fencing increases the seed density and species richness of perennial species in soil seed banks, as well as results in a decrease in spatial heterogeneity of seed density and species richness in soil seed banks. So, continuous fencing should be considered to restore the degraded sandy grasslands in management of semiarid grassland ecosystems.

Słowa kluczowe

EN

grazing; sandy grassland; soil seed bank; scale dependence; spatial heterogeneity

PL

wypas; użytki piaszczyste; bank nasion; łąka; przestrzenne zróżnicowanie

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2013
• Tom: Vol. 61, nr 2
• Strony: 221--231
• Opis fizyczny: Bibliogr. 53 poz., il.

Twórcy

autor

Zuo X.

• Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China
• Laboratory of Plant Stress Ecophysiology and Biotechnology (LPSEB), CAREERI, CAS, Lanzhou, 730000, China

autor

Zhao X.

• Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China
• Laboratory of Plant Stress Ecophysiology and Biotechnology (LPSEB), CAREERI, CAS, Lanzhou, 730000, China

autor

Zhao H.

• Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China
• Laboratory of Plant Stress Ecophysiology and Biotechnology (LPSEB), CAREERI, CAS, Lanzhou, 730000, China

autor

Zhang T.

• Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China
• Laboratory of Plant Stress Ecophysiology and Biotechnology (LPSEB), CAREERI, CAS, Lanzhou, 730000, China

autor

Wang S.

• Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China
• Laboratory of Plant Stress Ecophysiology and Biotechnology (LPSEB), CAREERI, CAS, Lanzhou, 730000, China

autor

Knops J.

• School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, 62588, USA

autor

Kochsiek A.

• School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, 62588, USA

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