%0 Journal Article %1 ISI:000249443400006 %A Huels, Joerg %A Otte, Annette %A Eckstein, Lutz R. %D 2007 %J BIOLOGICAL INVASIONS %K Apiaceae elasticity experiment_(LTRE) intraspecific_competition life_table_response loop_analysis management matrix_models vital_rates %N 7 %P 799-811 %T Population life-cycle and stand structure in dense and open stands of the introduced tall herb Heracleum mantegazzianum %V 9 %X Populations of the introduced Heracleum mantegazzianum consist of dense central stands, which gradually give way to open stands towards the margins. To analyse whether open stands are due to unsuitable conditions or represent the invading front for further spread, we studied life-cycle, population dynamics, stand structure and soil conditions of open and dense stands over two transition periods. Populations decreased during the first interval but increased after the extremely dry and warm summer of 2003 during the second interval. Open stands had shorter generation times, lower height, smaller proportions of small individuals and were less in equilibrium with the environment than dense stands. In open stands, growth to higher stages was most important, while in dense stands delayed development (self-loops) had a strong effect on population growth; stasis and fecundity contributed most to the difference in lambda between stand types. By petiole extension H. mantegazzianum may raise its

@article{ISI:000249443400006, abstract = {Populations of the introduced Heracleum mantegazzianum consist of dense central stands, which gradually give way to open stands towards the margins. To analyse whether open stands are due to unsuitable conditions or represent the invading front for further spread, we studied life-cycle, population dynamics, stand structure and soil conditions of open and dense stands over two transition periods. Populations decreased during the first interval but increased after the extremely dry and warm summer of 2003 during the second interval. Open stands had shorter generation times, lower height, smaller proportions of small individuals and were less in equilibrium with the environment than dense stands. In open stands, growth to higher stages was most important, while in dense stands delayed development (self-loops) had a strong effect on population growth; stasis and fecundity contributed most to the difference in lambda between stand types. By petiole extension H. mantegazzianum may raise its }, added-at = {2008-10-20T16:41:44.000+0200}, author = {Huels, Joerg and Otte, Annette and Eckstein, Lutz R.}, biburl = {https://www.bibsonomy.org/bibtex/210f161acc94c1566e3e0b34f36ee3a96/landscapeecol}, interhash = {c899f5405aff6cfd38aef9191546bf73}, intrahash = {10f161acc94c1566e3e0b34f36ee3a96}, issn = {1387-3547}, journal = {BIOLOGICAL INVASIONS}, keywords = {Apiaceae elasticity experiment_(LTRE) intraspecific_competition life_table_response loop_analysis management matrix_models vital_rates}, number = 7, pages = {799-811}, timestamp = {2008-10-20T16:41:44.000+0200}, title = {Population life-cycle and stand structure in dense and open stands of the introduced tall herb Heracleum mantegazzianum}, volume = 9, year = 2007 }