Sedge-meadow stage - hydrarch, Biology

Assignment Help:

Sedge-Meadow Stage - Hydrarch

Favoured by an increasing amount of light, as the former occupants disappear, they gradually change the reed swamp into a sedge meadow. And now species of Cyperaceae and Gramineae such as Carex, Juncus, Cyperus and Eleocharis colonise the area. They form mat-like vegetation with the help of their much branched rhizomatous systems. All these react upon the habitat by binding water-carried and wind-borne soil, accumulating plant debris and transpiring enormous quantities of water.

There is much rapid loss of water, and sooner or later the mud is exposed to air. As a result nutrients like ammonia, sulphides become oxidised to nitrates and sulphates. Thus the conditions in the area gradually change from marshy to mesic, and the marshy vegetation shows a decline. Upto the end of sedge-meadow stage, the climate of the region has no control over the succession because the water content of soil is high, irrespective of rainfall and climate of the region. At the end of this stage, the soil becomes dry and its water content will henceforth be dependent upon rainfall and climate of the region. The plants which succeed the sedge-meadow stage are therefore controlled by the climate to a very large extent. In dry climates the next stage may be grassland or some other xeric climax but in more moist climates it is woodland.


Related Discussions:- Sedge-meadow stage - hydrarch

Explain cigrates smoking from lifestyle risk factors, Explain cigrates smok...

Explain cigrates smoking from lifestyle risk factors ? Smoking is the single most important preventable risk factor for CAD. There is strong evidence that smoking can significa

Define the sequence-specific dna binding, Which of the following statements...

Which of the following statements regarding the interactions among sequence-specific DNA binding domains and their recognition sites is incorrect? A. Sequence-specific DNA bind

Insulation by fur and feathers, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Explain about the micronutrient deficiencies, Explain about the Micronutrie...

Explain about the Micronutrient Deficiencies? Micronutrient deficiencies are more common during calamities. Can you guess, why? This is due to the lack of diversified food item

Explain the ph meter - food microbiology, Explain the pH Meter - Food Micro...

Explain the pH Meter - Food Microbiology? pH is a negative logarithm of H+ ion concentration. Its value remains between 0 and 14. Pure water has a pH of 7 (neutral). pH value l

Define ergogenic and for training and competition, Define Ergogenic and for...

Define Ergogenic and for training and competition? There is always our desire to work with the body more .than its capability. This is more so in case of athletes. They wish to

Explain arteries in comparison to veins, Which of the below statements does...

Which of the below statements does NOT apply to arteries when comparing them to veins: a) Have thick walls b) Carry blood away from heart c) Highly elastic walls d) Ha

Diagnostic procedures for acute glomerulonephritis, Diagnostic Procedures ...

Diagnostic Procedures     Taking Clinical history    Urine analysis    Blood sample  for  estimation  of blood urea nitrogen    Antistrepto lysine  (ASO) titer

Photosynthesis, discovery of two light phase in photosynthesis

discovery of two light phase in photosynthesis

State the internal chromosomal segments, Which of the following best explai...

Which of the following best explains the reason why DNA ligase is needed to complete the replication of internal chromosomal segments? A. DNA ligase is able to delete the last

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd