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Role of Salix reinii patches in spatio-temporal patterns of cohabitants on a Japanese volcano

Journal of Plant Ecology 2022年第1期15卷 71-84页

作者： Miyuki Matsuda Shiro Tsuyuzaki Division of Integrated Environmental Science Graduate School of Environmental Earth ScienceHokkaido UniversitySapporo 060-0810Japan IDEA Consultants Inc. 3-15-1 KomazawaSetagaya WardTokyo 154-8585Japan

shrub patches often support the colonizers particularly under stressful and/or disturbed *** intensities of stresses and disturbances on mountains are often related to an elevation gradient and are decreased by shrub patches(canopy and litter).We aim to clarify these relationships by using shrub patches at different elevations on a *** monitored all shoots in plots established inside and outside of patches of Salix reinii(Salicaceae)and their related environments,such as temperature,light,moisture and chemistry,at three elevations on Mount Koma(1131 m a.s.l.),northern Japan,from early spring in 2005 to summer in *** patch structures were evaluated by area,branch density and litter *** structures of shrub patches did not differ among the *** patches increased the diversity of rare species,by an overall increase in plant species *** moisture,nitrogen and phosphate contents in the patches were higher than outside of *** effects of shrub patches on the cohabitants were overall positive,although the effects were negative on seedling abundance,shoot survival and *** results suggest that the growth patterns of shrub patches determine the plant community structures and facilitate plant diversity.

关键词： elevational difference interspecific interaction litter accumulation microenvironment shrub patch

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The role of shrub(Potentilla fruticosa)on ecosystem CO_(2) fluxes in an alpine shrub meadow

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Journal of Plant Ecology 2010年第2期3卷 89-97页

作者： Yuichiro Yashiro Yoko Shizu Mitsuru Hirota Ayako Shimono Toshiyuki Ohtsuka River Basin Research Center Gifu University1-1 YanagidoGifuGifu 501-1193Japan Graduate School of Life and Environmental Science University of Tsukuba1-1-1 TennodaiIbaraki 305-8521Japan Department of Ecology and Environmental Science Umea UniversityUmea 901-87Sweden

Aims Recent studies have shown that alpine meadows on the Qinghai-Tibetan plateau act as significant CO_(2)*** the plateau,alpine shrub meadow is one of typical grassland *** major alpine shrub on the plateau is Potentilla fruticosa L.(Rosaceae),which is distributed widely from 3200 to 4000 *** species play an important role on carbon sequestration in grassland *** addition,alpine shrubs are sensitive to climate change such as global *** global warming,the biomass and productivity of *** will increase on Qinghai-Tibetan ***,understanding the carbon dynamics in alpine shrub meadow and the role of shrubs around the upper distribution limit at present is essential to predict the change in carbon sequestration on the ***,the role of shrubs on the carbon dynamics in alpine shrub meadow remains *** objectives of the present study were to evaluate the magnitude of CO_(2)exchange of *** shrub patches around the upper distribution limit and to elucidate the role of *** on ecosystem CO_(2)fluxes in an alpine *** We used the static acrylic chamber technique to measure and estimate the net ecosystem productivity(NEP),ecosystem respiration(Re),and gross primary productivity(GPP)of *** shrub patches at three elevations around the species’upper distribution *** CO_(2)fluxes and environmental factors were measured from 17 to 20 July 2008 at 3400,3600,and 3800 m *** examined the maximum GPP at infinite light(GPPmax)and maximum Re(Remax)during the experimental time at each elevation in relation to aboveground biomass and environmental factors,including air and soil temperature,and soil water *** Findings patches of *** around the species’upper distribution limit absorbed CO_(2),at least during the *** NEP at infinite light(NEPmax)and GPPmax of shrub patches in the alpine meadow varied among the three elevations,with t

关键词： alpine meadow ecosystem respiration gross primary productivity net ecosystem productivity Potentilla fruticosa shrub patch

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