Summarize the points made in the lecture, being sure to explain how they respond to the specific points made in the reading passage.
The sea otter is a small mammal that lives in waters along the western coast of North America from California to Alaska. When some sea otter populations off the Alaskan coast started rapidly declining a few years ago, it caused much concern because sea otters play an important ecological role in the coastal ecosystem. Experts started investigating the cause of the decline and quickly realized that there were two possible explanations: environmental pollution or attacks by predators. Initially, the pollution hypothesis seemed the more likely of the two. The first reason why pollution seemed the more likely cause was that there were known sources of it along the Alaskan coast, such as oil rigs and other sources of industrial chemical pollution. Water samples from the area revealed increased levels of chemicals that could decrease the otters' resistance to lifethreatening infections and thus could Indirectly cause their deaths. Second, other sea mammals such as seals and sea lions along the Alaskan coast were also declining, indicating that whatever had endangered the otters was affecting other sea mammals as well. This fact again pointed to environmental pollution, since it usually affects the entire ecosystem rather than a single species. Only widely occurring predators, such as the orca (a large predatory whale), could have the same effect, but orcas prefer to hunt much larger prey, such as other whales.
Third, scientists believed that the pollution hypothesis could also explain the uneven pattern of otter decline: at some Alaskan locations the otter populations declined greatly, while at others they remained stable. Some experts explained these observations by suggesting that ocean currents or other environmental factors may have created uneven concentrations of pollutants along the coast.
The lecture completely contrasts with the passage's claim that environmental pollution is the main reason for the decrease in the number of sea otters in the coast of Alaska. Countering the prompt, the lecture has provided significant points explaining that predation is the prime reason for the decline in sea otter population.
First of all, the passage mentions that high amounts of chemical found in the Alaskan waters has led to lowering the immunity of sea otters which further leads into increased death rate. The lecture rebuts this statement, by stating that recently, the count of dead sea otters along the coast is reduced. This observation was directly linked with the fact that predation of sea otters has ascended due to which less dead sea otters are seen along the coast.
Additionally, the passage intimates that environmental pollution is not only affecting sea otters but also other sea mammals. Refuting the argument totally, the lecture delineates that sea otters have prefer to hunt whales which are descending in whale population reason being human hunting. Moreover, this results in a diet change of sea otters which in turn prey on other sea animals. Hence, the outcome is endangerment of other species of sea animals.
Orcas feed on sea otters.
| Post date | Users | Rates | Link to Content |
|---|---|---|---|
| 2019-09-17 | Anvita | 85 | view |
| 2018-09-11 | ATCHAYAPRIYA.M | 80 | view |
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Grammar and spelling errors:
Line 9, column 202, Rule ID: HAVE_PART_AGREEMENT[1]
Message: Use past participle here: 'preferred'.
Suggestion: preferred
...lecture delineates that sea otters have prefer to hunt whales which are descending in ...
^^^^^^
Line 9, column 456, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...erment of other species of sea animals. Orcas feed on sea otters
^^^^^^^
Transition Words or Phrases used:
also, but, first, hence, if, moreover, so, first of all
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 9.0 10.4613686534 86% => OK
Auxiliary verbs: 0.0 5.04856512141 0% => OK
Conjunction : 1.0 7.30242825607 14% => More conjunction wanted.
Relative clauses : 11.0 12.0772626932 91% => OK
Pronoun: 10.0 22.412803532 45% => OK
Preposition: 28.0 30.3222958057 92% => OK
Nominalization: 10.0 5.01324503311 199% => OK
Performance on vocabulary words:
No of characters: 1076.0 1373.03311258 78% => OK
No of words: 207.0 270.72406181 76% => More content wanted.
Chars per words: 5.19806763285 5.08290768461 102% => OK
Fourth root words length: 3.79308509922 4.04702891845 94% => OK
Word Length SD: 2.64158900763 2.5805825403 102% => OK
Unique words: 114.0 145.348785872 78% => More unique words wanted.
Unique words percentage: 0.550724637681 0.540411800872 102% => OK
syllable_count: 326.7 419.366225166 78% => 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: 8.0 8.23620309051 97% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
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: 9.0 13.0662251656 69% => 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: 23.0 21.2450331126 108% => OK
Sentence length SD: 68.120988952 49.2860985944 138% => OK
Chars per sentence: 119.555555556 110.228320801 108% => OK
Words per sentence: 23.0 21.698381199 106% => OK
Discourse Markers: 6.11111111111 7.06452816374 87% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 2.0 4.19205298013 48% => OK
Sentences with positive sentiment : 2.0 4.33554083885 46% => More positive sentences wanted.
Sentences with negative sentiment : 3.0 4.45695364238 67% => OK
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: 0.186293901877 0.272083759551 68% => OK
Sentence topic coherence: 0.0867187512899 0.0996497079465 87% => OK
Sentence topic coherence SD: 0.0334469717446 0.0662205650399 51% => OK
Paragraph topic coherence: 0.123350744574 0.162205337803 76% => OK
Paragraph topic coherence SD: 0.0205598465184 0.0443174109184 46% => 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: 14.6 13.3589403974 109% => OK
flesch_reading_ease: 48.13 53.8541721854 89% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 12.3 11.0289183223 112% => OK
coleman_liau_index: 13.18 12.2367328918 108% => OK
dale_chall_readability_score: 9.05 8.42419426049 107% => OK
difficult_words: 56.0 63.6247240618 88% => OK
linsear_write_formula: 14.0 10.7273730684 131% => OK
gunning_fog: 11.2 10.498013245 107% => OK
text_standard: 14.0 11.2008830022 125% => OK
What are above readability scores?
---------------------
Rates: 85.0 out of 100
Scores by essay e-grader: 25.5 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.