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Marina86 [1]
3 years ago
5

If the pond is resampled a year later, which of the following would best indicate that the pond had been adversely affected by a

djacent development?
Advanced Placement (AP)
1 answer:
Usimov [2.4K]3 years ago
3 0

This question is not complete; here is the complete question:

A one-hectare pond is sampled in early September. The sample yields 1 small catfish as well as 17 benthic invertebrates that represent 10 species.

If the pond is resampled a year later, which of the following would best indicate that the pond had been adversely affected by adjacent development?

A. An uncommon species has become more numerous

B. An increase in low-tolerance species has occurred

C. A decrease in high-tolerance species has occurred

D. Phylogenetic diversity has occurred

E. The biodiversity of the pond has decreased

The answer to this question is E. The biodiversity of the pond has decreased

Explanation:

In ecology, an ecosystem can be affected by adjacent developments including human developments or even other ecosystems and this can lead to positive or negative consequences.

In this context, one example that shows the was an adverse effect is "The biodiversity of the pond has decreased" because the reduction in diversity represents a major thread for an ecosystem as this makes species more vulnerable to disappear. Also, this can be caused by factors such as pollution caused by human development or major predator of the adjacent ecosystem feeding on organisms in the main ecosystem. Besides this, in the first sample, there were multiple species and a reduction in the second sample shows the ecosystem was weakened.

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Lena [83]
To be honest, I should know this answer because I am an animal science major, but its been a while since we learned about this stuff. So, from the brief 30 min google search I did: 

I can tell you it is almost certainly not "concentrates". Concentrates are usually made of high-energy, low-fiber cereal grains, like oats, corn, soybeans, etc.

Dry Roughage might be the answer just because according to http://modernfarmer.com/2014/12/turnips/, turnips are a diarrhetic for cows. So, they should be mixed with high-fiber feeds in order for the cow to more effectively use of the nutrients in turnips. However, the question asked specifically which feed INCLUDES root vegetables. So, I don't think that dry roughage can possibly be the answer. Dry roughage are high in fiber, low in energy, and usually around 10-15% moisture. Dry Roughages include things like hay, husks, and straw.  

Green Roughages is comprised usually contain high moisture content ranging from around 50-90%. I looked it up, turnips are slightly above that range; their moisture content resting at about 91-92%.  However other root vegetables did lie in range. Carrots having 88% moistuire, potatos 79%,  beet roots 87%, etc. So, I think you could make a case base on the moisture content of root vegetables that they would be found in green roughage. 

I do not think it would be Silage because that looks to be a mixture fodder(hay/corn) that has been anaerobically fermented in a silo into a succulent feed. 

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In conclusion, my best guess would be the answer is GREEN ROUGHAGES just based on the moisture content. Does that make sense to you too? I hope I am correct. I am sorry that I have to guess and that I couldn't tell you a definite answer. I hope this info helped you anyway!
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