PDF Notes #2- Ecological Succession - Weebly

Notes #2Ecological Succession

NAME_________________________________ Period_____ Date_______________________

Answer the following:

Community _______________________________-all of the different organisms that live together in an area. __E__c_o__l_o_g__i_c_a__l_s_u__c__c_e_s__s_i_o__n_______the series of predictable changes that occur in a

community over time.

** Primary ______________________________ succession refers to the settlement/establishment of

vegetation in an area previously uncolonized by organisms (often starts with bare rock!). Organisms which

pioneer first colonize an area are known as_______________________ species (lichens and mosses.)

** Secondary _______________________ succession refers to the recolonization of a geographic area,

which had been previously settled, but somehow disrupted. Some causes of disruption include

a. _F__i_r_e_______

b. Volcanism

c. Severe weather

d. Agriculture

e.D__e__v_e__l_o__p__m___e__n__t_

Both processes (primary and secondary succession) result in the most stable type of biome given

climax its geographical location. This is called a _________________________community.

Be able to tell which picture is which type of succession.

Go to this website:

Answer the following questions after READING the information:

1. Write the letters of the ponds in order from the youngest, to the oldest.

B Youngest_________

C ______

A ______

D ______ Oldest

B 2. Black bass and bluegill make their nests on sandy bottoms. In which pond would you find them? _____

3. What will happen to the black bass and blue gill as the floor of the ponds fills with organic debris?

Fish will eventually die out because they have no

_p__l_a__c_e___t_o___l_a__y__t__h__e__ir___e_g__g__s__.________________________________ C 4. Golden shiner and mud minnows lay their eggs on Chara. In which pond would you find them?________

5. Some amphibians and crayfish can withstand periods of dryness by burying themselves in mud. In

A and D which pond(s) would they survive? ________

6. Dragonfly nymphs spend their early stages clinging to submerged plants. Then, they climb to the surface, shed their skins and fly away as dragonflies. Which pond is best suited for

A dragonflies?__________

7. In which pond will gill breathing snails be replaced by lung breathing snails that climb to the

A and D surface to breathe? __________

8. Some mussels require a sandy bottom in order to maintain an upright position. In which pond will

D they die out. _____________

9. The climax community in the area of Michigan is a beech-maple forest. After the ponds are filled in, the area will undergo another series of stages of succession. This is illustrated below.

Briefly explain what is happening in the

diagram. What do you especially notice

about the trees?

__S_m___a__ll__g__r_a__s_s_e__s__t_h__e__n________ shrubs, then larger

__________________________________

and larger trees. __T_h__e__t__r_e_e__s__f_i_n__a__ll_y____________ __b_e__c_o__m___e__h__a__r_d_w___o__o_d_________ __t_r_e__e_s__w___h__ic__h__a__r_e___l_o_n__g______ lived trees. Trees are __g_e__t_t_i_n__g__b__i_g__g_e__r_._____________

Softwood trees Hardwood trees

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