PLANT POPULATIONS 2014 Výukový materiál EK 01 - 02 Tvůrce: Mgr. Šárka Vopěnková Tvůrce anglické verze: ThMgr. Ing. Jiří Foller Projekt: S anglickým jazykem do dalších předmětů Registrační číslo: CZ.1.07/1.1.36/03.0005 Tento projekt je spolufinancován ESF a SR ČR 2014
PLANT POPULATIONS population: a configuration of individuals, which grow on one habitat they are of identical genetic origin origin – three ways: a) cell division cyanophytes, algae very fast
PLANT POPULATIONS after successful spread of the populations the most advantageous combination of diaspore formation and vegetative spreading e.g. hairy reed grass plant populations have features proving a) at the level of individuals b) at the level of groups
PLANT POPULATIONS b) from a part separated from the mother organism spore, seed, fruit, bulb c) vegetative spreading posterity connected with rootstocks > couch-grass posterity connected with offshoots > strawberry
PLANT POPULATIONS features of the population: a) density expressed by the number of individuals on a square unit – on 1 m2 or1 hectare it depends on the size of plants appearance in the horizontal structure of the population
PLANT POPULATIONS b) natality it expresses natural grow ability of certain population reproducing vegetative and generative it is characterized by the number of new individuals a time unit in ideal conditions > plenitude of nutrients, space, absence of competitive relations natality much higher than can be observed in the nature
ROSTLINNÉ POPULACE against development of population counterworks so called environmental resistance > it includes mainly influences of other organisms and limited nutrient sources c) mortality dying of individuals in the population it expresses the change of amount of individuals in time
PLANT POPULATIONS structure of the population evaluated by: size classes > criterion is also height of the overground part age classes > on the basis of the age of individuals
PLANT POPULATIONS
PLANT POPULATIONS
WORKSHEET DESCRIBE THE PICTURES
SOURCES KINCL, Lubomír, Miloslav KINCL a Jana JAKRLOVÁ. Biologie rostlin: pro 1. ročník gymnázií. 4., přeprac. vyd. Praha: Fortuna, 2006, 302 s. ISBN 80-716-8947-5