The article discusses the extinction of Steller’s sea cow in the water around Bering Island off the coast of Siberia and provides three different theories to explain the extinction of sea cows. However, the professor explains that we don’t know what is the main cause of extinction and refutes each of the authors' theories.
First, the reading states that sea cows may have been overhunted by native groups of Siberian people. The professor refutes this point by stating that sea cows are a massive creature. Theirs weighted up to ten tons. He explains that only one sea cow could feed an entire village of native Siberian people for a month. Also, the number of people who lived there were quite small, as a result, they hunted a small number of sea cows. Thus, The native people couldn’t be the main cause of the extinction even though they hunted sea cows.
Second, the article claims that sea cow population may become extinct because of ecosystem disturbances that caused a decline in their main food source. However, the professor counters this point by stating that severe weather conditions would affect other creatures in that region. He explains that other marine species such as whales would decline if the food storage had declined. But ships didn’t report the decline of whales. That’s why the sea cows didn’t experience the famine.
Third, the reading avers that main cause of extinction of the sea cows could have been Europen fur traders who caught the last sea cow. The lecture opposes this point by saying that population decline of sea cows was before first European came to the Island. Even though the European traders killed the last sea cow, they were not the main problem of the extinction of this marine species. The main cause of the extinction was before first Europe arrived at the Bering Island.
Grammar and spelling errors:
Line 3, column 405, Rule ID: SMALL_NUMBER_OF[1]
Message: Specify a number, remove phrase, use 'a few', or use 'some'
Suggestion: a few; some
...e quite small, as a result, they hunted a small number of sea cows. Thus, The native people could...
^^^^^^^^^^^^^^^^^
Transition Words or Phrases used:
also, but, first, however, if, may, second, so, third, thus, such as, as a result
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 9.0 10.4613686534 86% => OK
Auxiliary verbs: 6.0 5.04856512141 119% => OK
Conjunction : 3.0 7.30242825607 41% => More conjunction wanted.
Relative clauses : 13.0 12.0772626932 108% => OK
Pronoun: 23.0 22.412803532 103% => OK
Preposition: 34.0 30.3222958057 112% => OK
Nominalization: 10.0 5.01324503311 199% => OK
Performance on vocabulary words:
No of characters: 1554.0 1373.03311258 113% => OK
No of words: 311.0 270.72406181 115% => OK
Chars per words: 4.99678456592 5.08290768461 98% => OK
Fourth root words length: 4.19942759058 4.04702891845 104% => OK
Word Length SD: 2.43782922739 2.5805825403 94% => OK
Unique words: 157.0 145.348785872 108% => OK
Unique words percentage: 0.504823151125 0.540411800872 93% => More unique words wanted or less content wanted.
syllable_count: 461.7 419.366225166 110% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 5.0 3.25607064018 154% => OK
Article: 11.0 8.23620309051 134% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 0.0 2.5761589404 0% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 17.0 13.0662251656 130% => OK
Sentence length: 18.0 21.2450331126 85% => The Avg. Sentence Length is relatively short.
Sentence length SD: 38.4751751178 49.2860985944 78% => OK
Chars per sentence: 91.4117647059 110.228320801 83% => OK
Words per sentence: 18.2941176471 21.698381199 84% => OK
Discourse Markers: 4.76470588235 7.06452816374 67% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 1.0 4.33554083885 23% => More positive sentences wanted.
Sentences with negative sentiment : 3.0 4.45695364238 67% => OK
Sentences with neutral sentiment: 13.0 4.27373068433 304% => Less facts, knowledge or examples wanted.
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.614313153514 0.272083759551 226% => OK
Sentence topic coherence: 0.208365135415 0.0996497079465 209% => Sentence topic similarity is high.
Sentence topic coherence SD: 0.14599715354 0.0662205650399 220% => The coherence between sentences is low.
Paragraph topic coherence: 0.392846138157 0.162205337803 242% => OK
Paragraph topic coherence SD: 0.135745739255 0.0443174109184 306% => More connections among paragraphs wanted.
Essay readability:
automated_readability_index: 11.3 13.3589403974 85% => Automated_readability_index is low.
flesch_reading_ease: 61.67 53.8541721854 115% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 9.1 11.0289183223 83% => OK
coleman_liau_index: 11.72 12.2367328918 96% => OK
dale_chall_readability_score: 7.83 8.42419426049 93% => OK
difficult_words: 65.0 63.6247240618 102% => OK
linsear_write_formula: 7.5 10.7273730684 70% => OK
gunning_fog: 9.2 10.498013245 88% => OK
text_standard: 8.0 11.2008830022 71% => OK
What are above readability scores?
---------------------
Rates: 61.6666666667 out of 100
Scores by essay e-grader: 18.5 Out of 30
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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.