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Plant Populations: Characteristics and Structures

This educational material provides an overview of plant populations, including their genetic origins, modes of spread, and population features such as density, natality, mortality, and structure. The worksheet allows students to describe and analyze pictures related to plant populations.

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Plant Populations: Characteristics and Structures

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  1. PLANT POPULATIONS 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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 thancan be observed in the nature PLANT POPULATIONS

  7. 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 ROSTLINNÉ POPULACE

  8. 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

  9. PLANT POPULATIONS

  10. PLANT POPULATIONS

  11. WORKSHEET DESCRIBE THE PICTURES

  12. 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 SOURCES

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