Both lecture and reading passage talk about the various reasons behind the extinction of large marine mammals called Steller's sea cows. While the reading article put forth three theories about how the animal became extinct, the lecture refutes the claims by pointing the unfeasibility.
First, the reading claims sea cows were good source of food to native people living in the harsh Siberian environment and over hunting by forced sea cows to extinction. However, the lecture argues that these mammals were massive in size and one sea cow would have been enough to feed the small population for months. So, native people did not have to hunt large number of sea cows.
In addition, the reading presents ecosystem disturbance as another possible reason. Kelp was the main source of food for these mammals and ecological changes hampered the kelp growth and ultimately the sea cow population. The lecture counters this point by stating if the ecological changes were severe then it would have affected other sea animals too. But the whale population did not show any decline during that time. It shows there was not food shortage, so the theory is unconvincing.
Lastly, the reading article asserts that European fur traders contributed to decline of the sea cows. These traders used weapons to hunt sea cows in large numbers. The lecture refuses the claim by pointing out that sea cows population started to decline even before the traders came to the island. Moreover, the professor adds the largest number of sea cows' population was a century before the traders arrived there.
In conclusion, the lecture disagrees with the claims discussed in the reading passage and states that the reason behind the Steller's sea cow extinction is unknown.
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- TPO-34 - Integrated Writing Task A huge marine mammal known as Steller’s sea cow once lived in the waters around Bering Island off the coast of Siberia. It was described in 1741 by Georg W. Steller, a naturalist who was among the first Europeans to see 83
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Grammar and spelling errors:
Line 3, column 222, Rule ID: ADJECTIVE_IN_ATTRIBUTE[1]
Message: A more concise phrase may lose no meaning and sound more powerful.
Suggestion: massive
... lecture argues that these mammals were massive in size and one sea cow would have been enough ...
^^^^^^^^^^^^^^^
Line 3, column 336, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: didn't
...opulation for months. So, native people didnt have to hunt large number of sea cows. ...
^^^^^
Line 5, column 380, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: didn't
...a animals too. But the whale population didnt show any decline during that time. It s...
^^^^^
Line 5, column 436, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: wasn't
...ecline during that time. It shows there wasnt food shortage, so the theory is unconvi...
^^^^^
Line 7, column 220, Rule ID: POSSESIVE_APOSTROPHE[1]
Message: Possible typo: apostrophe is missing. Did you mean 'cows'' or 'cow's'?
Suggestion: cows'; cow's
...uses the claim by pointing out that sea cows population started to decline even befo...
^^^^
Line 7, column 323, Rule ID: THE_SUPERLATIVE[2]
Message: A determiner is probably missing here: 'adds the largest'.
Suggestion: adds the largest
... to the island. Moreover, the professor adds largest number of sea cows population was a cen...
^^^^^^^^^^^^
Transition Words or Phrases used:
but, first, however, if, lastly, moreover, so, then, while, in addition, in conclusion
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 8.0 10.4613686534 76% => OK
Auxiliary verbs: 2.0 5.04856512141 40% => OK
Conjunction : 7.0 7.30242825607 96% => OK
Relative clauses : 5.0 12.0772626932 41% => More relative clauses wanted.
Pronoun: 11.0 22.412803532 49% => OK
Preposition: 34.0 30.3222958057 112% => OK
Nominalization: 11.0 5.01324503311 219% => Less nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1465.0 1373.03311258 107% => OK
No of words: 283.0 270.72406181 105% => OK
Chars per words: 5.17667844523 5.08290768461 102% => OK
Fourth root words length: 4.10153676581 4.04702891845 101% => OK
Word Length SD: 2.41636179621 2.5805825403 94% => OK
Unique words: 150.0 145.348785872 103% => OK
Unique words percentage: 0.530035335689 0.540411800872 98% => OK
syllable_count: 448.2 419.366225166 107% => 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: 9.0 8.23620309051 109% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 2.0 2.5761589404 78% => OK
Performance on sentences:
How many sentences: 15.0 13.0662251656 115% => OK
Sentence length: 18.0 21.2450331126 85% => The Avg. Sentence Length is relatively short.
Sentence length SD: 37.0561136057 49.2860985944 75% => OK
Chars per sentence: 97.6666666667 110.228320801 89% => OK
Words per sentence: 18.8666666667 21.698381199 87% => OK
Discourse Markers: 5.73333333333 7.06452816374 81% => OK
Paragraphs: 5.0 4.09492273731 122% => OK
Language errors: 6.0 4.19205298013 143% => OK
Sentences with positive sentiment : 4.0 4.33554083885 92% => OK
Sentences with negative sentiment : 6.0 4.45695364238 135% => OK
Sentences with neutral sentiment: 5.0 4.27373068433 117% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.515193124274 0.272083759551 189% => OK
Sentence topic coherence: 0.183572408221 0.0996497079465 184% => OK
Sentence topic coherence SD: 0.099155036532 0.0662205650399 150% => OK
Paragraph topic coherence: 0.287520626461 0.162205337803 177% => OK
Paragraph topic coherence SD: 0.117636157693 0.0443174109184 265% => More connections among paragraphs wanted.
Essay readability:
automated_readability_index: 12.4 13.3589403974 93% => Automated_readability_index is low.
flesch_reading_ease: 53.21 53.8541721854 99% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 10.3 11.0289183223 93% => OK
coleman_liau_index: 12.76 12.2367328918 104% => OK
dale_chall_readability_score: 8.1 8.42419426049 96% => OK
difficult_words: 64.0 63.6247240618 101% => OK
linsear_write_formula: 13.5 10.7273730684 126% => OK
gunning_fog: 9.2 10.498013245 88% => OK
text_standard: 13.0 11.2008830022 116% => OK
What are above readability scores?
---------------------
Rates: 83.3333333333 out of 100
Scores by essay e-grader: 25.0 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.