What Is Hydrarch Succession

Q. The pioneer species in xerarch and hydrarch successions are respectively

1. lichens and sedges
2. phytoplanktons and lichens
3. lichens and phytoplanktons
4. lichens and rooted hydrophytes

Q. In primary succession in water, phytoplanktons are followed by:

1. Scrub
2. Submerged plants
3. Reed-swamp
4. Marsh-meadow

Q. The correct sequence of plants in a hydrosere, starting from Volvox is

1. Hydrilla
2. Oak
3. Lantana
4. Pistia
5. Scripus

Q. a) Colonization of a rocky terrain is a natural process. Mention the group of organisms which invade this area first. Give an example.
b) Over the years, it has been observed that some of the lakes are disappearing due to urbanization. In absence of human interference, depict by making a flow chart, how do the successional seres progress from hydric to mesic condition.
c) Identify the climax community of hydrarch and xerarch succession. [5]

Q. Typha belongs to ___________ stage of hydrarch succession.

1. Sedge meadow
2. Woodland
3. Submerged
4. Reed swamp

Q. Stages of hydrarch are

1. d, c, e, b, a
2. c, e, a, b, d
3. b, d, c, a, e
4. d, e, c, b, a

Q. The correct sequence of plants in the hydrosphere is

1. Oak - Lantana - Scirpus - Pistia - Hydrilla - Volvox
2. Volvox - Hydrilla - Pistia - Scirpus - Lantana - Oak
3. Pistia - Volvox - Scirpus - Hydrilla - Oak - Lantana
4. Oak - Lantana - Volvox - Hydrilla - Pistia - Scirpus

Q. Which of the following options represents the right sequence of stages in hydrarch succession ?

I. Meadow stage
II. Reed swamp stage
III. Rooted submerged plant stage
IV. Phytoplankton stage
V. Rooted floating plant stage

1. IV, III, V, II and I
2. III, V, I, II and IV
3. II, IV, III, I and V
4. IV, V, III, II and I
5. V, III, II, I and IV

Q. Stage of hydrarch are :

1. d , c, e , b , a
2. c , e , a , b , d
3. b , d , c , a , e
4. d , e , c , b , a
5. e , c , b, a , d

Q. In hydrarch succession, reed swamp stage is preceded by

1. Forest community
2. Scrub stage
3. Floating stage
4. Sedge meadow stage

Q. Second stage of hydrosere is occupied by plants like

1. Salix
2. Vallisneria
3. Azolla
4. Typha

Q. Explain any five stages of hydrosere.

Q. The second stage of hydrosere is occupied by plants like.

1. Azolla
2. Typha
3. Carex
4. Vallisneria

Q. Correct sequence of plants in a hydrosere is

1. Pistia $\to$ Volvox $\to$ Scirpus $\to$Hydrilla $\to$ Oak $\to$ Lantana
2. Oak $\to$ Lantana $\to$ Volvox $\to$ Hydrilla $\to$ Pistia $\to$ Scirpus
3. Oak $\to$ Lantana $\to$ Scirpus $\to$ Pistia $\to$ Hydrilla $\to$ Volvox
4. Volvox $\to$ Hydrilla $\to$ Pistia $\to$ Scirpus $\to$ Lantana $\to$ Oak

Q. Which of the following options represents the right sequence of stages in hydrarch succession ?

I. Meadow stage
II. Reed swamp stage
III. Rooted submerged plant stage
IV. Phytoplankton stage
V. Rooted floating plant stage

1. II, IV, III, I and V
2. IV, III, V, II and I
3. III, V, I, II and IV
4. IV, V, III, II and I
5. V, III, II, I and IV

Q. Both hydrarch and xerarch successions lead to

1. Medium water conditions
2. Excessive wet conditions
3. Xeric conditions
4. Highly dry conditions

Q. Red Sandal Wood is

1. Santalum album

2. Pterocarpus santalinus

3. Pterocarpus marsupium

4. Butea monosperma

Q.

Archaea are mostly found in ..............

1. Low temperature regions

2. Extreme conditions

3. Surfaces of lakes

4. Marsh lands

Q. Explain how a hydrarch succession progresses from hydric to mesic condition and forms a stable climax community.

Q. Given are some of the stages of the hydrarch.
A. Marsh-meadow stage
B. Reed-swamp stage
C. Submerged plant stage
D. Phytoplankton stage
E. Free floating plant stage
Select the option that represents the correct sequence of these stages.

1. C $\to$ E $\to$ A $\to$ B $\to$ D
2. D $\to$ C $\to$ E $\to$ B $\to$ A
3. B $\to$ D $\to$ C $\to$ A $\to$ E
4. D $\to$ E $\to$ C $\to$ B $\to$ A

Q.
Define hydrosere.

Q. Some of the stages in the hydrach are labelled as
(A) Marsh meadow stage
(B) Reed swamp stage
(C) Submerged plant stage
(D) Phytoplankton stage and
(E) Submerged free floating plant stage
Identify the choice that represents the correct sequence of these stages.

1. D, C, E, B and A
2. C, E, A, B and D
3. B, D, C, A and E
4. D, E, C, B and A
5. E, C, B, A and D

Q. The second stage of hydrosere is occupied by plants like

1. Typha
2. Salix
3. Vallisneria
4. Azolla

Q. The conversion of a pond to a forest community is an example of .

1. xerarch succession
2. mesarch succession
3. hydrarch succession

Q. Which of the following options represents the right sequence of stages in hydrarch succession ?

I. Meadow stage
II. Reed swamp stage
III. Rooted submerged plant stage
IV. Phytoplankton stage
V. Rooted floating plant stage

1. IV, III, V, II and I
2. III, V, I, II and IV
3. V, III, II, I and IV
4. II, IV, III, I and V
5. IV, V, III, II and I

Q. A plant which lives for a few days is called

1. Annual
2. Perennial
3. Biennial
4. Ephemeral

Q. The conversion of a pond to a forest community is an example of .

1. xerarch succession
2. mesarch succession
3. hydrarch succession

Q. The conversion of a pond to a forest community is an example of .

1. xerarch succession
2. mesarch succession
3. hydrarch succession

Q. Ecological succession in a hydrosere includes

1. Increase in species diversity
2. Increase in structural complexity
3. Increase in organic matter
4. All of the above

Q. How would you differentiate hydrarch succession from xerarch ?