3VT - Ecology

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

Ecology 6.1-6.6

Main topics: feeding relations, carbon and nitrogen cycles, pyramids and succession 

The cod (kabeljauw) feeds on the lodde, a tiny fish that feeds on animal and plant based plankton

To which 2 links can you ‘assign’ the cod (kabeljauw)?

1. Producer, consumer
2. Primary consumer, secondary consumer
3. Secondary consumer, tertiary consumer
4. Tertiary consumer, detrivore

When there is succession in an ecosystem then...

1. The total biomass will decrease
2. The number of species in the system wil remain constant
3. The number of species in the system will increase
4. The number of species in the system will decrease

Menno states: a pyramid of numbers is always a pyramid shape
Wilco states: the last link in the foodchain always has the most biomass
Which statement(s) is/are correct?

1. Both are correct
2. Only Menno is correct
3. Only Wilco is correct
4. None are correct

Biotic

Abiotic

Sunlight

Parasites

Detrivores

Temperature

Soil composition

Plants

What is the function of bacteria and fungi in the nutrient cycle?

1. They fotosynthesise
2. Clear up non biodegradable waste
3. Are consumers
4. Convert waste into plant available nutrients

“Het IJsselmeer” used to be called the “Zuiderzee” and was filled with salty water. With the construction of the “afsluitdijk” the area turned from salty to fresh water. This affected the fish species in this area

With the switch from salt to fresh water in the ‘IJsselmeer’ some fish species disappeared, others flourished. The herring disappeared. The stickleback remained.
Which tolerance curve belongs to the stickleback?

1. Curve A
2. Curve B
3. Curve C
4. Curve D

What is the role of soil bacteria in an ecosystem?