Trade-off of sexual and asexual recruitment in a dominant weed Ligularia virgaurea (Maxim.) In alpine grasslands (China)

• Autorzy: Wu G. , Hu T. , Liu Z.
• Języki publikacji: EN

Abstrakty

EN

Ligularia virgaurea (Maxim.) is a typical naturally-occurring native noxious weed, widely distributed in alpine grasslands of the Tibetan Plateau, China. Three field sampling plots (30 m ' 50 m) dominated by L. virgaurea were selected to study its population colonization mode and the relationship between sexual- and clonalrecruitment in alpine meadow of the Qinghai-Tibetan Plateau, NW China. Field investigations were conducted on its soil seed bank, seed rain and the individuals of new recruitment (seedlings and ramets) to study its sexual and asexual recruitment. And, 46 individuals which produced the seeds were selected randomly to study their relationship between seed production and ramet production. Results showed that there were more ramets (26.23 ramets m[^-2]) and less seedlings (6.70 seedlings m[^-2]) and a mean value of seed rain was close to 8.04 seeds m[^-2], but the soil seed bank for this species was not found in study sites. Significantly negative correlations (r = -0.416, P <0.001) between seed number per individual and ramet number per adult individual were found for L. vrigaurea in studied alpine grasslands. Our results revealed that clonal reproduction was the main population colonization mode. In addition, there was a significantly negative relationship between seed production and ramets for this species.

Słowa kluczowe

EN

alpine grassland; recruitment; seed; seedling

PL

alpejskie łąki; języczka; Ligularia virgaurea; nabór; nasienie; ramet; rameta; siew

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2010
• Tom: Vol. 58, nr 1
• Strony: 81--86
• Opis fizyczny: Bibliogr. 33 poz.,

Twórcy

autor

Wu G.

autor

Hu T.

autor

Liu Z.

• State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100 Shaanxi, P. R. China ; Key Laboratory of Arid and Grassland Ecology of the Ministry of Education, Lanzhou University, Lanzhou, 730000,

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