Wind as a medium for dispersal, Biology

Assignment Help:

Wind as a medium for Dispersal

Many microorganisms, fungal spores and bacteria are freely transported over long distances even by moderate winds. In wind pollinated plants, the amount of pollen grains is relatively large because a large fraction of it may be wasted. Pollen grains in some genera like Pinus are specially adapted to float in air due to the presence of air bladders. Many plants produce extremely small seeds, others develop winglike structures or fine silky hairs that help them to float in air (Figure shown below). Wind is a universal agent for the dispersal of fruits and seeds which helps in better establishment of seedlings resulting in greater success of survival and healthy growth by avoiding competition.

Dispersal of pollutants

Wind determines the extent of initial dilution of pollutants, emissidn, direction and rate of dispersal. The more widely and rapidly they are dispersed, lesse~w ill be their impact on the environment. If the wind speed is high, pollutant concentrations are likely to be relatively low, while low wind or absence of wind builds up high concentration of pollutants.

2190_wind as dispersal.jpg

Figure: Fruits (a) and seeds (b) d plants adapt for distance transportation by wind.


Related Discussions:- Wind as a medium for dispersal

Define the primary stain and mordant, Define the Primary Stain and Mordant?...

Define the Primary Stain and Mordant? (i) Primary Stain - Crystal violet is the primary or first stain, which stains all the cells violet/purple. (ii) Mordant - Gram's iodin

Explain adaptive radiation and convergence, Adaptive radiation OR convergen...

Adaptive radiation OR convergence Adaptive radiation Explanation of the adaptive radiation process linked to the introduction of a single species and the wide range

Excluding development, tube feet,stone canal,medreporite and teidman;s body...

tube feet,stone canal,medreporite and teidman;s body notes

Endocytosis and exocytosis, Endocytosis and Exocytosis Endocytosis is the...

Endocytosis and Exocytosis Endocytosis is the process by which substances are brought into the cell from outside by formation of membrane bound vesicles. These extra cellular sub

Determine requirement of trace elements for infant, Determine Requirement o...

Determine Requirement of Trace elements for Infant? Most elements, such as zinc and iodine, hold a major significance in infant nutrition. Zinc is associated with growth while

How implant design and surface affect osseointegration, Q. How Implant desi...

Q. How Implant design and surface affect osseointegration? Implant design Most conductive design for osseointegration is root form. They can be threaded, hydroxyapatite co

Assessment - steps in nursing process, Assessment This includes the da...

Assessment This includes the data collection (nursing history and physical assessment), comparison of data with the normal, and analysis of the data gathered. Systematic an

Define limitations of agar syringe or agar sausage method, Define Limitatio...

Define Limitations of Agar Syringe or Agar Sausage Method? (i) It is applicable to surfaces with low contaminants. (ii) Problem of spreading colonies may occur. (iii) Col

Define oxidised starch, Oxidised starch Oxidised starch finds a number ...

Oxidised starch Oxidised starch finds a number of uses in the food industry where a neutral tasting, low viscosity 'body builder' is required as in lemon curd manufacture, in s

What is machined implant, What is Machined implant Machined implant ha...

What is Machined implant Machined implant has irregular surface roughness from approximately 10μm grooves and ridges in the machining direction. The roughness of implants can

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