MadSci Network: Botany
Query:

Re: What is the difference between epiphytes and parasites?

Date: Mon May 3 18:31:04 2004
Posted By: David Hershey, Faculty, Botany, NA
Area of science: Botany
ID: 1083590005.Bt
Message:

Epiphytes are usually defined by botanists as plants that live on other plants 
without being parasitic or otherwise harming the host plant. Examples of 
epiphytes include many ferns, mosses, orchids and bromeliads. 

Large numbers of epiphytes on a tree can intercept mineral nutrients before 
the host plant can. That can deprive the host of an adequate supply. Benzing 
(1980) considered this represented "nutritional piracy" by epiphytes.

Some parasitic plants, such as mistletoes and dodders, also often live on 
their host plant but "steal" organic and inorganic nutrients from the host 
plant. 

The second website has a good discussion of epiphytes and how the definition 
is subject to interpretation.

Zooplankton are tiny, often microscopic, aquatic organisms (animals and 
protists) that feed on other organisms. 

Phytoplankton are tiny, often microscopic, aquatic organisms (algae and 
bacteria) that are photosynthetic. 

"Phyto" means plant so phytoplankton is sort of an obsolete term because algae 
and bacteria are no longer in the plant kingdom. 


References


Epiphyte definitions


What is an Epiphyte?


Re: What is the relationship between bromeliads, orchids, and epiphytes?


Zooplankton definition


Phytoplankton

Benzing, D. 1980. The Biology of the Bromeliads. Eureka, CA: Mad River Press.


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