The reading and the lecture are both about the reasoning behind the rapid decline of the population of sea otters. The author of the reading claims that environmental pollution was the cause of the event. The lecturer contradicts the claims made by the author. He feels that it is because of predation.
To begin with, the author argues that 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. This specific argument is challenged by the lecturer. He says that the lack of sea otters washed up on the shore suggests the sea otters have been eaten by predators.
Secondly, the writer believes that 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. The lecturer, however, rebuts this by mentioning that Orcas could be predators of sea otters and all the other small mammals mentioned. Orcas usually prefer whales but since whales were not abundant anymore, Orcas had to resort to sea otters along with the other mammals, ultimately creating a decline of those species.
Finally, the author posits that 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 coast. In contrast, the lecturer argues that there is an uneven pattern because of the specific places Orcas reside in. Not all places are accessible to Orcas, such as shallow, rocky areas. Hence, the uneven pattern of the disappearance of sea otters.
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Grammar and spelling errors:
Line 1, column 206, Rule ID: ENGLISH_WORD_REPEAT_BEGINNING_RULE
Message: Three successive sentences begin with the same word. Reword the sentence or use a thesaurus to find a synonym.
...l pollution was the cause of the event. The lecturer contradicts the claims made by...
^^^
Line 3, column 120, Rule ID: SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA[1]
Message: Did you forget a comma after a conjunctive/linking adverb?
Suggestion: Also,
...ong the Alaskan coast such as oil rigs. Also water samples taken in the area showed ...
^^^^
Transition Words or Phrases used:
also, but, finally, hence, however, if, second, secondly, so, while, another thing, in contrast, such as, to begin with
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 13.0 10.4613686534 124% => OK
Auxiliary verbs: 5.0 5.04856512141 99% => OK
Conjunction : 5.0 7.30242825607 68% => OK
Relative clauses : 11.0 12.0772626932 91% => OK
Pronoun: 20.0 22.412803532 89% => OK
Preposition: 41.0 30.3222958057 135% => OK
Nominalization: 9.0 5.01324503311 180% => OK
Performance on vocabulary words:
No of characters: 1651.0 1373.03311258 120% => OK
No of words: 319.0 270.72406181 118% => OK
Chars per words: 5.17554858934 5.08290768461 102% => OK
Fourth root words length: 4.22617688928 4.04702891845 104% => OK
Word Length SD: 2.52415926562 2.5805825403 98% => OK
Unique words: 167.0 145.348785872 115% => OK
Unique words percentage: 0.523510971787 0.540411800872 97% => OK
syllable_count: 513.9 419.366225166 123% => OK
avg_syllables_per_word: 1.6 1.55342163355 103% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 4.0 3.25607064018 123% => OK
Article: 9.0 8.23620309051 109% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 3.0 2.5761589404 116% => OK
Performance on sentences:
How many sentences: 18.0 13.0662251656 138% => OK
Sentence length: 17.0 21.2450331126 80% => The Avg. Sentence Length is relatively short.
Sentence length SD: 40.7130882586 49.2860985944 83% => OK
Chars per sentence: 91.7222222222 110.228320801 83% => OK
Words per sentence: 17.7222222222 21.698381199 82% => OK
Discourse Markers: 6.61111111111 7.06452816374 94% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 2.0 4.19205298013 48% => OK
Sentences with positive sentiment : 4.0 4.33554083885 92% => OK
Sentences with negative sentiment : 5.0 4.45695364238 112% => OK
Sentences with neutral sentiment: 9.0 4.27373068433 211% => Less facts, knowledge or examples wanted.
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.269488287776 0.272083759551 99% => OK
Sentence topic coherence: 0.0785077792152 0.0996497079465 79% => OK
Sentence topic coherence SD: 0.0604778530185 0.0662205650399 91% => OK
Paragraph topic coherence: 0.159268703124 0.162205337803 98% => OK
Paragraph topic coherence SD: 0.0434066914877 0.0443174109184 98% => OK
Essay readability:
automated_readability_index: 11.8 13.3589403974 88% => Automated_readability_index is low.
flesch_reading_ease: 54.22 53.8541721854 101% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 9.9 11.0289183223 90% => OK
coleman_liau_index: 12.47 12.2367328918 102% => OK
dale_chall_readability_score: 9.03 8.42419426049 107% => OK
difficult_words: 92.0 63.6247240618 145% => OK
linsear_write_formula: 8.0 10.7273730684 75% => OK
gunning_fog: 8.8 10.498013245 84% => OK
text_standard: 10.0 11.2008830022 89% => OK
What are above readability scores?
---------------------
Rates: 80.0 out of 100
Scores by essay e-grader: 24.0 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.