Ecology : competition

Discussion of the distribution and abundance of living organisms and how these properties are affected by interactions between the organisms and their environment

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Balwyn
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Ecology : competition

Post by Balwyn » Sun Apr 22, 2012 3:39 am

Can anyone tell me how to judge whether there is a DIRECT competition between different species? THX

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JackBean
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Post by JackBean » Sun Apr 22, 2012 7:56 am

to be it a direct competition, they probably have to share a resource or niche, right?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.

animartco
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Re: Ecology : competition

Post by animartco » Mon Apr 23, 2012 6:25 pm

Balwyn wrote:Can anyone tell me how to judge whether there is a DIRECT competition between different species? THX

If the larger species is seen to be shoving the smaller off the food and eating it themselves. ex. lions hyenas vultures, and jackals round a carcass. or magpies and sparrows at a bird table.

JorgeLobo
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Post by JorgeLobo » Mon Apr 23, 2012 10:55 pm

The criteria should be boradly applicable - from bacteria to animals. One consideration could be pursuit of same food source/substrate in the same context.

Juliesmile62
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Re: Ecology : competition

Post by Juliesmile62 » Thu Apr 26, 2012 6:33 pm

Can someone tell me what a "mode of endeavor niche" is

JorgeLobo
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Re: Ecology : competition

Post by JorgeLobo » Fri Apr 27, 2012 11:58 am

Sounds like someone trying to coin a phrase. Where did you hear it?

Juliesmile62
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Re: Ecology : competition

Post by Juliesmile62 » Fri Apr 27, 2012 4:38 pm

In an article in the Smithsonian, written by Bil Gilbert aug 1987. He writes " Most creatures locate in places and find unique ways of exploiting them so as to reduce the need to with other similar appetites. Biologists call these special fields and modes of endeavor niches."

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Re: Ecology : competition

Post by JorgeLobo » Fri Apr 27, 2012 5:37 pm

seems something is kissing - ...to reduce the need to with?

can you give a refernce please?

Juliesmile62
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Re: Ecology : competition

Post by Juliesmile62 » Fri Apr 27, 2012 5:44 pm

Reduce the need to vie with others of similar appetites

Bil Gilbert, "Lizards that take to the desert like ducks to water" Smithsonian, (Aug. 1987), 78

animartco
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Re: Ecology : competition

Post by animartco » Sat Apr 28, 2012 11:24 am

Juliesmile62 wrote:In an article in the Smithsonian, written by Bil Gilbert aug 1987. He writes " Most creatures locate in places and find unique ways of exploiting them so as to reduce the need to with other similar appetites. Biologists call these special fields and modes of endeavor niches."

I haven;'t read the quote but I think it means cases like humming birds and their particular flowers. Where you have two similar species competing for the same basic food, they evolve to source it differently. ex one has a long beak for a long flower and another has a curved beak for a curved flower, so that they are not in direct competition for the same food-nectar.

Juliesmile62
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Post by Juliesmile62 » Sat Apr 28, 2012 1:59 pm

Thank you, just needed to verify

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