caa a22 4500 475751817 CHVBK 20180406123526.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1023/A:1026570623406 doi (NATIONALLICENCE)springer-10.1023/A:1026570623406 Variable demography in relation to germination time in the annual plant Tagetes micrantha Cav. (Asteraceae) [Elektronische Daten] [Jorge González-Astorga, Juan Núñez-Farfán] This study tests whether variability in a life history trait such as emergence time has ecological and evolutionary significance in seasonal environments due to their relationship with fitness components. The population dynamics of nine different cohorts of seedlings emergence were analyzed in a natural population of the annual herb Tagetes micrantha Cav. (Asteraceae). Temporal variation in seedling emergence was related to the pattern of precipitation, while spatial variation could be related to topographical heterogeneity. Plants that emerged at the beginning of the season (early germination) had lower probabilities of survivorship than those that emerged at the end of the season (late germination). In contrast, plants that emerged early had, on average, higher fecundity than those that emerged late. The net result of these contrasting patterns of survival and fecundity constitute a life history trade-off in T.micrantha. Kluwer Academic Publishers, 2000 Asteraceae nationallicence Demography nationallicence Fecundity nationallicence Germination nationallicence Heterogeneous environments nationallicence Life history nationallicence Mexico nationallicence Survival nationallicence Tagetes micrantha nationallicence Trade-off nationallicence González-Astorga Jorge E-mail: farfan@servidor.unam.mx aut Núñez-Farfán Juan E-mail: farfan@servidor.unam.mx aut Plant Ecology Kluwer Academic Publishers 151/2(2000-12-01), 253-259 1385-0237 151:2<253 2000 151 11258 https://doi.org/10.1023/A:1026570623406 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1026570623406 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- González-Astorga Jorge E-mail: farfan@servidor.unam.mx aut NATIONALLICENCE 700 1- Núñez-Farfán Juan E-mail: farfan@servidor.unam.mx aut NATIONALLICENCE 773 0- Plant Ecology Kluwer Academic Publishers 151/2(2000-12-01), 253-259 1385-0237 151:2<253 2000 151 11258 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer