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Zusammenfassung Populationsökologie Biologie $4.82   Add to cart

Summary

Zusammenfassung Populationsökologie Biologie

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Alles zum Thema Populationsökoligie z.B. Lebenszyklusstategien, Regulationsfaktoren, Wachstum etc.

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  • August 9, 2022
  • 3
  • 2022/2023
  • Summary
  • Secondary school
  • Gymnasium
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POPULATIONSÖKOLOGIE
Population =
Angehörige einer Art , die im selben Gebiet leben und

sich ohne Einschränkungen untereinander fortpflanzen

schwierig abzugrenzen da es Wanderungen von Individuen gibt

Individuum Gruppe von Individuen 2 Gruppen von Individuen
einer Art einer Art /Population) einer Art (
zwei Population)




Arten :
sind Gruppen von natürlichen Populationen, die untereinander fortpflanzungsfähig


(fertil) sind und fertile Nachkommen erzeugen

Hybrid : aus zwei verschiedenen Arten wird steriler Hybrid gezeugt

Wachstumsrate und Abnahme einer Populationsgröße

Geburtenrate (Natalität b) Geburten Gesamtpopulation (Gesamtanzahl N)

= :




Sterberate (Mortalität ) Todesfälle Gesamtpopulation
• :
=
m




Differenz ergibt Wachstumsrate (r) r b- m

=




Exponentielles Wachstum


setzt gleichbleibend uneingeschränkte

wachstumsmöglichkeiten voraus



Bedingungen sind günstig für eine Population

J förmige WachstumsKurve
• -





UN
-
-

Veränderung der Individuenanzahl



dt =
Zeitabschnitt


• r= Wachstumsrate


N ursprüngliche Populationsgröße

=




Wenn z.B Keine Fressfeinde, genügend Nährboden
Nahrung ,

.

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