Sea otters are a small mammal that lives in the waters along North America's west coast from California
to Alaska. A few years ago some of the sea otter populations off of the Alaskan coast started to decline
rapidly and raised several concerns because of their important role in the coastal ecosystem. Experts
began investigating and came up with two possible explanations. One explanation was environmental
pollution and the second was attacked by predators.
At first, it seemed as if the pollution was the most likely cause for the population decline. One reason
pollution was more likely was because of the known pollution sources along the Alaskan coast such as oil
rigs. Also, water samples taken in the area showed increased levels of chemicals that could decrease the
otters' immune systems and indirectly result in their deaths.
Another thing that pointed to pollution as the culprit was the decline of other sea mammals such as seals
in the same areas. This indicated that whatever was affecting the otters was also affecting the other sea
mammals. Environmental pollution usually affects an entire ecosystem instead of just one species. Only
predators that occurred in a large area, such as orcas (a large predatory whale), could cause the same
effect, but they usually hunt larger prey.
Finally, scientists believed the pollution hypothesis would also explain the uneven pattern of otter decline.
In some Alaskan locations, the otter population declined greatly while other populations remained stable.
Some experts suggested this could be explained by ocean currents, or other environmental factors might
have created uneven concentrations of pollutants along the coas
The reading passage suggests that pollution is the major factor of the sea otter’s population's decline rather than the predation hypothesis. However, the speaker says that predation is the reason behind such decline.
According to the reading passagae that sea otters declined because of the pollution of some chemicals as oil rigs and other chemicals as the water sample shown. In contrast, the speaker opposes the reading ‘s statement by mentioning that if the pollution is the responsible for the otters’decline, should be found a dead bodies of see otters, but there are not any dead bodies wash out.
Second, as the writer states that other sea mammals like sea lions and seals also are declining which supports the pollution hypothesis, as pollution is the only factor which affects a large number of species not only one. Yet, the lecturer refutes that passage by arguing that decling could be because the otters feed on those mmamles, not from pollution.
Third, the author claim that there is inequlity in the otters’ population shrinking, which further supports the pollution hypothesis. On the other hand, the lectures challengs the reading passage by pointing out that uneven pattern because the large orcaus predate the sea otters in such shallow water. Therefore, this shalloweness ease to orcus to predate the sea otters. Therefore, this explains why there is uneven paatern in the otters popullation.
Grammar and spelling errors:
Line 5, column 184, Rule ID: LARGE_NUMBER_OF[1]
Message: Specify a number, remove phrase, or simply use 'many' or 'numerous'
Suggestion: many; numerous
...lution is the only factor which affects a large number of species not only one. Yet, the lecturer...
^^^^^^^^^^^^^^^^^
Transition Words or Phrases used:
also, but, however, if, second, so, therefore, third, in contrast, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 10.0 10.4613686534 96% => OK
Auxiliary verbs: 2.0 5.04856512141 40% => OK
Conjunction : 3.0 7.30242825607 41% => More conjunction wanted.
Relative clauses : 12.0 12.0772626932 99% => OK
Pronoun: 12.0 22.412803532 54% => OK
Preposition: 22.0 30.3222958057 73% => OK
Nominalization: 12.0 5.01324503311 239% => Less nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1207.0 1373.03311258 88% => OK
No of words: 229.0 270.72406181 85% => More content wanted.
Chars per words: 5.27074235808 5.08290768461 104% => OK
Fourth root words length: 3.89008302616 4.04702891845 96% => OK
Word Length SD: 2.66461436507 2.5805825403 103% => OK
Unique words: 126.0 145.348785872 87% => More unique words wanted.
Unique words percentage: 0.550218340611 0.540411800872 102% => OK
syllable_count: 362.7 419.366225166 86% => OK
avg_syllables_per_word: 1.6 1.55342163355 103% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 2.0 3.25607064018 61% => OK
Article: 6.0 8.23620309051 73% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 3.0 2.5761589404 116% => OK
Performance on sentences:
How many sentences: 10.0 13.0662251656 77% => Need more sentences. Double check the format of sentences, make sure there is a space between two sentences, or have enough periods. And also check the lengths of sentences, maybe they are too long.
Sentence length: 22.0 21.2450331126 104% => OK
Sentence length SD: 53.7397432074 49.2860985944 109% => OK
Chars per sentence: 120.7 110.228320801 109% => OK
Words per sentence: 22.9 21.698381199 106% => OK
Discourse Markers: 8.4 7.06452816374 119% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 4.0 4.33554083885 92% => OK
Sentences with negative sentiment : 2.0 4.45695364238 45% => More negative sentences wanted.
Sentences with neutral sentiment: 4.0 4.27373068433 94% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.211052643901 0.272083759551 78% => OK
Sentence topic coherence: 0.0889968466732 0.0996497079465 89% => OK
Sentence topic coherence SD: 0.0521079975022 0.0662205650399 79% => OK
Paragraph topic coherence: 0.134262922898 0.162205337803 83% => OK
Paragraph topic coherence SD: 0.0144797164314 0.0443174109184 33% => Paragraphs are similar to each other. Some content may get duplicated or it is not exactly right on the topic.
Essay readability:
automated_readability_index: 14.8 13.3589403974 111% => OK
flesch_reading_ease: 49.15 53.8541721854 91% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 11.9 11.0289183223 108% => OK
coleman_liau_index: 13.58 12.2367328918 111% => OK
dale_chall_readability_score: 8.8 8.42419426049 104% => OK
difficult_words: 59.0 63.6247240618 93% => OK
linsear_write_formula: 13.5 10.7273730684 126% => OK
gunning_fog: 10.8 10.498013245 103% => OK
text_standard: 14.0 11.2008830022 125% => OK
What are above readability scores?
---------------------
Rates: 83.3333333333 out of 100
Scores by essay e-grader: 25.0 Out of 30
---------------------
Note: the e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.