Biodiversity at Bremen | Flashcards & Summaries

Select your language

Suggested languages for you:
Log In Start studying!

Lernmaterialien für Biodiversity an der Bremen

Greife auf kostenlose Karteikarten, Zusammenfassungen, Übungsaufgaben und Altklausuren für deinen Biodiversity Kurs an der Bremen zu.

TESTE DEIN WISSEN

Biodiversity roughly follows ecosystem productivity. Following this, in which parts of the world can the highest biodiversity probably be found?

Lösung anzeigen
TESTE DEIN WISSEN

tropical latitudes

Lösung ausblenden
TESTE DEIN WISSEN

What is the problem with Morphospecies when measuring diversity?

Lösung anzeigen
TESTE DEIN WISSEN

misleading morphological phenomena can lead to an overestimation of the number of species, e.g.:

  • sexual dimorphism
  • ecomorphosis [z.B. Alterungsprozesse, bedingt durch Entwicklung des individuums]
  • cyclomorphosis (cyclic or seasonal changes)
  • colour varieties
  • metamorphosis
  • juveniles
Lösung ausblenden
TESTE DEIN WISSEN

Theophrastus

Lösung anzeigen
TESTE DEIN WISSEN

similar work as Aristoteles, but on plants

Lösung ausblenden
TESTE DEIN WISSEN

Which factors have to be taken into account when measuring diversity?

Lösung anzeigen
TESTE DEIN WISSEN

criteria of differentiation

the variability of single criteria

the number of criteria

the context dependence (of perception of the criteria)

Lösung ausblenden
TESTE DEIN WISSEN

High species numbers don't necessarily signify conservation value. Why?

Lösung anzeigen
TESTE DEIN WISSEN

species in danger of extinction -> criterion = population size

endemic species -> criterion = rarity

Lösung ausblenden
TESTE DEIN WISSEN

Which problems can occur when recording species in an area? And what are possible solutions?

Lösung anzeigen
TESTE DEIN WISSEN
  • organisms do not want to be recorded (active at night, hidden in soil, particular phenology [Jahresablauf], difficult to identify, abundance cannot be accurately estimated)
  • the area is large and there's not enough time
    • if there's just a relative number to compare to other studies needed, one could spend a specific amount of time in each area to obtain a comparative estimate
    • use indicator species to estimate whether a habitat is likely to be species rich or not 
Lösung ausblenden
TESTE DEIN WISSEN

Three different criteria for quantifying biodiversity

Lösung anzeigen
TESTE DEIN WISSEN

- species richness

- number of individuals

        - combined: Shannon-Wiener-Index!

- nature conservation value of species

Lösung ausblenden
TESTE DEIN WISSEN

What is the Evenness (Shannon-Wiener-Index)?

Lösung anzeigen
TESTE DEIN WISSEN

Index for the distribution of species in a population

- E = H’/H_max
- E = H’/lnS
        - S = number of species
        - H_max = maximum Shannon
diversity = lnS; the maximum
Shannon diversity is reached, when
all species in a population are
evenly distributed (every species
has the same number of
individuals)

Lösung ausblenden
TESTE DEIN WISSEN

What are ramets?

Lösung anzeigen
TESTE DEIN WISSEN

the clonal parts of plants which possess an own root and are potentially independent of other parts, but connected by rhizomes -> are they counted as individuals? -> same genetics and really all part of the same plant

Lösung ausblenden
TESTE DEIN WISSEN

3 levels of biodiversity

Lösung anzeigen
TESTE DEIN WISSEN
  • Species (Importance easy to understand and communicate, relatively easy to record)
  • Genes (Important as creating the variation of life, but less visible)
  • Ecosystems (Habitat of species, but difficult to define and delimit)
Lösung ausblenden
TESTE DEIN WISSEN

WWF 1989 definition of biodiversity

Lösung anzeigen
TESTE DEIN WISSEN

The millions of plants, animals and microorganisms, the genes they contain, and the intricate system they help boild into the living environment

Lösung ausblenden
TESTE DEIN WISSEN

What differs biological entities from physically defined ones?

Lösung anzeigen
TESTE DEIN WISSEN

they can...

pass information (communication, heredity)

change in space (growth, breakdown, mobility, dispersal, migration)

change over time (individual development, evolution)

affect other entities directly (biotic interactions, e.g. predation, mutualism)

directly affect their (a)biotic environment (nutrient uptake, digging)

Lösung ausblenden
  • 48810 Karteikarten
  • 1062 Studierende
  • 7 Lernmaterialien

Beispielhafte Karteikarten für deinen Biodiversity Kurs an der Bremen - von Kommilitonen auf StudySmarter erstellt!

Q:

Biodiversity roughly follows ecosystem productivity. Following this, in which parts of the world can the highest biodiversity probably be found?

A:

tropical latitudes

Q:

What is the problem with Morphospecies when measuring diversity?

A:

misleading morphological phenomena can lead to an overestimation of the number of species, e.g.:

  • sexual dimorphism
  • ecomorphosis [z.B. Alterungsprozesse, bedingt durch Entwicklung des individuums]
  • cyclomorphosis (cyclic or seasonal changes)
  • colour varieties
  • metamorphosis
  • juveniles
Q:

Theophrastus

A:

similar work as Aristoteles, but on plants

Q:

Which factors have to be taken into account when measuring diversity?

A:

criteria of differentiation

the variability of single criteria

the number of criteria

the context dependence (of perception of the criteria)

Q:

High species numbers don't necessarily signify conservation value. Why?

A:

species in danger of extinction -> criterion = population size

endemic species -> criterion = rarity

Mehr Karteikarten anzeigen
Q:

Which problems can occur when recording species in an area? And what are possible solutions?

A:
  • organisms do not want to be recorded (active at night, hidden in soil, particular phenology [Jahresablauf], difficult to identify, abundance cannot be accurately estimated)
  • the area is large and there's not enough time
    • if there's just a relative number to compare to other studies needed, one could spend a specific amount of time in each area to obtain a comparative estimate
    • use indicator species to estimate whether a habitat is likely to be species rich or not 
Q:

Three different criteria for quantifying biodiversity

A:

- species richness

- number of individuals

        - combined: Shannon-Wiener-Index!

- nature conservation value of species

Q:

What is the Evenness (Shannon-Wiener-Index)?

A:

Index for the distribution of species in a population

- E = H’/H_max
- E = H’/lnS
        - S = number of species
        - H_max = maximum Shannon
diversity = lnS; the maximum
Shannon diversity is reached, when
all species in a population are
evenly distributed (every species
has the same number of
individuals)

Q:

What are ramets?

A:

the clonal parts of plants which possess an own root and are potentially independent of other parts, but connected by rhizomes -> are they counted as individuals? -> same genetics and really all part of the same plant

Q:

3 levels of biodiversity

A:
  • Species (Importance easy to understand and communicate, relatively easy to record)
  • Genes (Important as creating the variation of life, but less visible)
  • Ecosystems (Habitat of species, but difficult to define and delimit)
Q:

WWF 1989 definition of biodiversity

A:

The millions of plants, animals and microorganisms, the genes they contain, and the intricate system they help boild into the living environment

Q:

What differs biological entities from physically defined ones?

A:

they can...

pass information (communication, heredity)

change in space (growth, breakdown, mobility, dispersal, migration)

change over time (individual development, evolution)

affect other entities directly (biotic interactions, e.g. predation, mutualism)

directly affect their (a)biotic environment (nutrient uptake, digging)

Biodiversity

Erstelle und finde Lernmaterialien auf StudySmarter.

Greife kostenlos auf tausende geteilte Karteikarten, Zusammenfassungen, Altklausuren und mehr zu.

Jetzt loslegen

Das sind die beliebtesten Biodiversity Kurse im gesamten StudySmarter Universum

biodiversity

University of East Anglia

Zum Kurs
biodiversité

Université de Montréal

Zum Kurs
Biodiversité

Université de Caen Basse Normandie

Zum Kurs
BIODIVERSITY

University of Perpetual Help, System Dalta

Zum Kurs
Biodiversité

Université de Versailles Saint-Quentin-en-Yvelines

Zum Kurs

Die all-in-one Lernapp für Studierende

Greife auf Millionen geteilter Lernmaterialien der StudySmarter Community zu
Kostenlos anmelden Biodiversity
Erstelle Karteikarten und Zusammenfassungen mit den StudySmarter Tools
Kostenlos loslegen Biodiversity