THE EFFECT OF VEGETATION CHARACTER ON ABUNDANCE AND STRUCTURE OF SUBPOPULATIONS OF RARE HERB SPECIES GENTIANA PNEUMONANTHE L.

被引:0
作者
Kostrakiewicz-Gieralt, Kinga [1 ]
机构
[1] Jagiellonian Univ, Inst Bot, Dept Plant Ecol, PL-31512 Krakow, Poland
关键词
flowers; fruits; Gentiana pneumonanthe; individual; shading; stem; sub-population; vegetation; POPULATION-STRUCTURE; COMPETITION; MANAGEMENT; DEMOGRAPHY; DIVERSITY; MEADOW; CONSEQUENCES; GRASSLANDS; HABITAT; HISTORY;
D O I
暂无
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
During the 20th century in Central and Eastern Europe, traditional agricultural management was either heavily intensified or abandoned due to socio-economic reasons. The land abandonment led to subsequent secondary succession reverted many wet meadows into Phragrnites swamps, Salix or Alnus thickets, as well as woodlands. Therefore, the understanding of changes in abundance and structure of populations in the process of succession has become very important especially for rare and endangered species. In Poland one of strictly protected plant is Gentiana pneurnonanthe L. It is a nonclonal, long-lived, iteroparous plant consisted of numerous vegetative and generative stems, bearing 1-25 flowers per year. The investigations of abundance and structure of subpopulations of Gentiana pneumonanthe were conducted in the years 2009-2011 in abandoned Molinietum caeruleae meadows dominated by low-stature species (Patch I), prevailed by tall grasses (Patch II), willows (Patch III), as well as partly overgrown by shrubs and trees (Patch IV). The average height of vegetation cover achieved from 65.3 cm (Patch I), via 85.8 cm (Patch II) and 94.0 cm (Patch III), to 142.7 cm (Patch IV). The gradually decline of abundance of Gentiana pneumonathe subpopulations and increased trend toward their senilization along the gradient of vegetation height might be due to successional closure of plant cover, preventing seedling recruitment. The total number of stems per individual and length of vegetative stems decreased with augmentation of neighbouring plants dimensions, whereas the height of generative stems, as well as flower and fruit production presented inversed trend. The greatest dimensions of capsules found in patch dominated by small meadow species might be due to greater availability of solar radiation. The conditions of studied subpopulations decrease gradually from patch dominated by small meadow species, via sites prevailed by grasses and willows, to place overgrown by shrubs and trees. Although obvious differences in abundance and structure of individuals, the prospects of all observed populations are poor, especially that patches are not subjected active protection.
引用
收藏
页码:35 / 43
页数:9
相关论文
共 42 条
  • [1] [Anonymous], ROCZ AR POZN
  • [2] [Anonymous], 1996, STUDIA OSRODKA DOKUM
  • [3] BILLETER R, 2003, APPL VEG SCI, V6, P3
  • [4] Brzosko E, 2001, ANN BOT FENN, V38, P249
  • [5] Brzosko Emilia, 1999, Polish Botanical Studies, V14, P15
  • [6] Use of vegetation classification and plant indicators to assess grazing abandonment in Estonian coastal wetlands
    Burnside, Niall G.
    Joyce, Chris B.
    Puurmann, Elle
    Scott, Dawn M.
    [J]. JOURNAL OF VEGETATION SCIENCE, 2007, 18 (05) : 645 - 654
  • [7] Plant competition underground
    Casper, BB
    Jackson, RB
    [J]. ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS, 1997, 28 : 545 - 570
  • [8] Effects of fertilization and neighbour removal on biomass allocation and fruit production in Cistus ladanifer
    Delgado, J. A.
    Serrano, J. M.
    Lopez, F.
    Acosta, F. J.
    [J]. PLANT BIOSYSTEMS, 2011, 145 (02): : 324 - 330
  • [9] Den Virtuella Floran, 1996, VIRTUELLA FLORAN
  • [10] Abandonment alters community composition and canopy structure of Swiss calcareous fens
    Diemer, M
    Oetiker, K
    Billeter, R
    [J]. APPLIED VEGETATION SCIENCE, 2001, 4 (02) : 237 - 246