The Instigator
kkurke
Pro (for)
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The Contender
rhino033
Con (against)
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Black Flies are a friend not a foe in the environment

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Voting Style: Open Point System: 7 Point
Started: 3/14/2015 Category: Science
Updated: 1 year ago Status: Post Voting Period
Viewed: 302 times Debate No: 71690
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kkurke

Pro

Everybody thinks Black Flies just drink blood and spread diseases, but black flies have a purpose after all.

The blackfly isn"t the most common type of fly in Canada, but it is very common in other places such as Brazil and Thailand, these two places are known to make their food using black flies. In Brazil they cook the black flies to make there breakfast lunch and dinner. In Thailand they make black fly soup. The black fly adults are useful in the food chain because birds and insect predators such as dragonflies and damselflies eat them. Also they are a good source of food for many other invertebrates such as plecopteran [stone fly] and salmonids, which are fish. However the larvae [which are found in streams and rivers] are also food for other aquatic invertebrates, fish, and ducks.

The larvae however plays a role in the processing of the organic matter, it is removed from the water column and, as a consequence of the larva"s low digestion efficiency, it is digested as nutritious fecal pellets [poop]. The fecal pellets, sink rapidly to the bottom of the water source and is eaten by the aquatic invertebrates that live there. This large amount of organic matter provides food for invertebrates and microorganisms, and fertilizes river valleys.

Although adult black flies can have a negative effect on humans, they play a huge role in the environment as pollinators. That is how I know black flies are good for the environment.
rhino033

Con

Black Flies Cause Environmental Damage

Black Flies are notorious for carrying disease and for a good reason. They cause concern for public health with Onchocerciasis, where a Black Fly will bite you and plant larvae into your blood system which causes itching, inflammation, and even blindness (1); breeding, as males will tend to swarm after birth causing outdoor events to be unbearable (2); and attacking livestock, the Black Fly is capable of transmitting numerous diseases, suffocating animals, and causing "toxic shock" in poultry, (2).

Sure, it the insect may pollinate plants but plants are only half of the environment as we animals make up the other half. This insect would qualify as a parasite, "Parasitism is a non-mutual symbiotic relationship between species, where one species, the parasite, benefits at the expense of the other, the host" (Wikipedia) (3).

With this in mind how can this animal possibly be good for the environment if it harms half of the populace. Environment is defined as, "The natural environment encompasses all living and non-living things occurring naturally on Earth or some region thereof." (Wikipedia) (4). Thus, we are part of the environment whether you believe it or not and because of that this species can not have a positive effects on our environment.

References
1. "Parasites - Onchocerciasis (also Known as River Blindness)." Centers for Disease Control and Prevention. Centers for Disease Control and Prevention, 21 May 2013. Web. 15 Mar. 2015. .
2. Hill, Catherine, and John MacDonald. "Black Flies." Black Flies. Purdue University. Web. 15 Mar. 2015.
3. "Parasitism." Wikipedia. Wikimedia Foundation, 14 Mar. 2015. Web. 15 Mar. 2015.
4. "Natural Environment." Wikipedia. Wikimedia Foundation, 10 Mar. 2015. Web. 15 Mar. 2015.
Debate Round No. 1
kkurke

Pro

kkurke forfeited this round.
rhino033

Con

Opponent forfeited.
Debate Round No. 2
kkurke

Pro

kkurke forfeited this round.
rhino033

Con

rhino033 forfeited this round.
Debate Round No. 3
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