The lecture and the reading are debate the reasons why the marine mammal known as Stelle' sea cow became extinct in 1768. the author of the reading believes that there are three main causes for that. The lecturer on the other hand, thinks that the claims made in the article might be not true.
First of all, the author says that the exitintion of the sea cows is the result of their overhunting by groups of native Siberian people. The lecturer argues that this creatures were massive, therefore one sea cow could have fed the Siberian population for a month,so there was no reason to hunt them all.
Second, the author exposes the theory of the ecosystem disturbance, which hold that the decline of sea cow may be due to some disturbance that negatively effected their main surce od food, kelps. the lecturer rebuts this claim and she explains that a ecosystem disturbance would have affected the broader ecosistem and not only the kelps, in fact, it is not reported any decline of other mammals such as whales.
Finally, the lecturer also excludes the third and last explanations proposed by the author. She excludes that the extincition of sea cows is due to the arrival of european fur traders to the island after 1741, because they possessed weapons that allow them to kill a large number animals in a short time. She point out that the population of sea cows were already reduced when the traders arrived, therefore somenthing else must had happened long before the eurpean. she concludes saying the the reason are still unclear.
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Grammar and spelling errors:
Line 1, column 122, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: The
... Stelle sea cow became extinct in 1768. the author of the reading believes that the...
^^^
Line 3, column 164, Rule ID: THIS_NNS[1]
Message: Did you mean 'these'?
Suggestion: these
...berian people. The lecturer argues that this creatures were massive, therefore one s...
^^^^
Line 3, column 265, Rule ID: COMMA_PARENTHESIS_WHITESPACE
Message: Put a space after the comma
Suggestion: , so
... fed the Siberian population for a month,so there was no reason to hunt them all. ...
^^^
Line 5, column 197, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: The
...fected their main surce od food, kelps. the lecturer rebuts this claim and she expl...
^^^
Line 5, column 250, Rule ID: EN_A_VS_AN
Message: Use 'an' instead of 'a' if the following word starts with a vowel sound, e.g. 'an article', 'an hour'
Suggestion: an
...rebuts this claim and she explains that a ecosystem disturbance would have affect...
^
Line 7, column 310, Rule ID: HE_VERB_AGR[1]
Message: The pronoun 'She' must be used with a third-person verb: 'points'.
Suggestion: points
...rge number animals in a short time. She point out that the population of sea cows wer...
^^^^^
Line 7, column 468, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: She
...t had happened long before the eurpean. she concludes saying the the reason are sti...
^^^
Line 7, column 489, Rule ID: ENGLISH_WORD_REPEAT_RULE
Message: Possible typo: you repeated a word
Suggestion: the
...efore the eurpean. she concludes saying the the reason are still unclear.
^^^^^^^
Line 7, column 489, Rule ID: DT_DT[1]
Message: Maybe you need to remove one determiner so that only 'the' or 'the' is left.
Suggestion: the; the
...efore the eurpean. she concludes saying the the reason are still unclear.
^^^^^^^
Transition Words or Phrases used:
also, but, finally, first, may, second, so, still, therefore, third, in fact, such as, first of all, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 11.0 10.4613686534 105% => OK
Auxiliary verbs: 5.0 5.04856512141 99% => OK
Conjunction : 4.0 7.30242825607 55% => More conjunction wanted.
Relative clauses : 13.0 12.0772626932 108% => OK
Pronoun: 23.0 22.412803532 103% => OK
Preposition: 26.0 30.3222958057 86% => OK
Nominalization: 7.0 5.01324503311 140% => OK
Performance on vocabulary words:
No of characters: 1279.0 1373.03311258 93% => OK
No of words: 266.0 270.72406181 98% => OK
Chars per words: 4.80827067669 5.08290768461 95% => OK
Fourth root words length: 4.03850299372 4.04702891845 100% => OK
Word Length SD: 2.35566741606 2.5805825403 91% => OK
Unique words: 155.0 145.348785872 107% => OK
Unique words percentage: 0.582706766917 0.540411800872 108% => OK
syllable_count: 394.2 419.366225166 94% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 4.0 3.25607064018 123% => OK
Article: 8.0 8.23620309051 97% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 1.0 2.5761589404 39% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 11.0 13.0662251656 84% => 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: 24.0 21.2450331126 113% => OK
Sentence length SD: 53.3926667203 49.2860985944 108% => OK
Chars per sentence: 116.272727273 110.228320801 105% => OK
Words per sentence: 24.1818181818 21.698381199 111% => OK
Discourse Markers: 10.7272727273 7.06452816374 152% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 9.0 4.19205298013 215% => Less language errors wanted.
Sentences with positive sentiment : 1.0 4.33554083885 23% => More positive sentences wanted.
Sentences with negative sentiment : 5.0 4.45695364238 112% => 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: 0.430599663393 0.272083759551 158% => OK
Sentence topic coherence: 0.146937809089 0.0996497079465 147% => OK
Sentence topic coherence SD: 0.104226263052 0.0662205650399 157% => OK
Paragraph topic coherence: 0.243564250768 0.162205337803 150% => OK
Paragraph topic coherence SD: 0.0540858842786 0.0443174109184 122% => OK
Essay readability:
automated_readability_index: 13.3 13.3589403974 100% => OK
flesch_reading_ease: 55.58 53.8541721854 103% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 11.5 11.0289183223 104% => OK
coleman_liau_index: 10.91 12.2367328918 89% => OK
dale_chall_readability_score: 8.33 8.42419426049 99% => OK
difficult_words: 59.0 63.6247240618 93% => OK
linsear_write_formula: 10.5 10.7273730684 98% => OK
gunning_fog: 11.6 10.498013245 110% => OK
text_standard: 12.0 11.2008830022 107% => OK
What are above readability scores?
---------------------
Rates: 76.6666666667 out of 100
Scores by essay e-grader: 23.0 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.