The zebra mussel, a freshwater shellfish native to Eastern Europe, has long been spreading out from its original habitats and has now reached parts of North America. There are reasons to believe that this invasion cannot be stopped and that it poses a serious threat to freshwater fish populations in all of North America.
First, the history of the zebra mussel's spread suggests that the invasion might be unstoppable. It is a prime example of an invasion made possible by human transportation. From the zebra mussel's original habitats in Eastern Europe, ships helped spread it out along new canals built to connect Europe's waterways. The mussel can attach itself to a ship's bottom or can survive in the water - called "ballast water" - that the ship needs to take on to properly balance its cargo. By the early nineteenth century, the mussel had spread to the whole of Europe. It was later carried to the east coast of North America in the ballast water of ships traveling from Europe. The way ships have spread the zebra mussel in the past strongly suggests that the species will soon colonize all of North America.
Moreover, once zebra mussels are carried to a new habitat, they can dominate it. They are a hardy species that does well under a variety of conditions, and they have a high rate of reproduction. Most important, however, zebra mussels often have no predators in their new habitats, and species without natural predators are likely to dominate their habitats.
Finally, zebra mussels are likely to cause a decline in the overall fish population in habitats where they become dominant. The mussels are plankton eaters, which means that they compete for food with many freshwater fish species
Both the lecture and the article talk about the effects of zebra mussel on the North
America habitat. The article claims that zebra mussel fish has invaded to this new habitat from Europe and Asia and this invasion is unstoppable asnd destructive. It provides three reasons of support. On the other hand, the professor asserts that there are ways to control this human interfered invasion of zebra mussel fish.
First, the professor avers that the most important way of zebre mussel invasion is transfering them from Europe to the east coast of North America by "balast water" of ships. It can be discontinued just by requiering the ships to empty their balast water that they bring from Europe in the ocean far from the coast and replenish that with the salt water from ocean, which it can kill the zebra mussel. Hence, with this strategy transfering of zebra mussel will stop. With this explanation, he repudiates the first reason of the writer which this invasion could not be discontinued from a historical evidance view.
Second, the lecturer points out the zebra mussel will find new predators such as sea birds. When the zebra mussel in new habitat increase, the sea birds will find this easy pray and change their eating habit. Consequently, the zebra mussel fish could not dominate the North America ocean's coast easily. Some thing that the reading states. With this prediction, the author's reason for dominating zebra fish in new habitat does not hold water.
Third, the speaker posits that evern the zebra fish dominate in the new habitat, it has a positive effect on bottom eating fish's population. He agrees in principal with the writer which zebra mussel may pose a negative effect on plankton eating species, but he emphasize on the advantage of the zebra mussel fish on other kind o f fish population. With this reasoning he undrevalue the importance of the writer's idea about the negative effect of zebra mussel on the whole fish's population in the North America region.
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Grammar and spelling errors:
Line 1, column 85, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...the effects of zebra mussel on the North America habitat. The article claims that...
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Message: Possible typo: you repeated a whitespace
Suggestion:
...rfered invasion of zebra mussel fish. First, the professor avers that the most...
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Message: Possible typo: you repeated a whitespace
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...inued from a historical evidance view. Second, the lecturer points out the zebr...
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Line 4, column 309, Rule ID: ANY_BODY[2]
Message: Did you mean 'Something'?
Suggestion: Something
... the North America oceans coast easily. Some thing that the reading states. With this pred...
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Line 5, column 1, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
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...h in new habitat does not hold water. Third, the speaker posits that evern the...
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Line 5, column 157, Rule ID: IN_PRINCIPAL[1]
Message: Did you mean 'in principle' (=as a rule)?
Suggestion: in principle
...ttom eating fishs population. He agrees in principal with the writer which zebra mussel may ...
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Line 5, column 267, Rule ID: HE_VERB_AGR[1]
Message: The pronoun 'he' must be used with a third-person verb: 'emphasizes'.
Suggestion: emphasizes
...fect on plankton eating species, but he emphasize on the advantage of the zebra mussel fi...
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Line 5, column 410, Rule ID: POSSESIVE_APOSTROPHE[1]
Message: Possible typo: apostrophe is missing. Did you mean 'writers'' or 'writer's'?
Suggestion: writers'; writer's
...ing he undrevalue the importance of the writers idea about the negative effect of zebra...
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Transition Words or Phrases used:
but, consequently, first, hence, may, second, so, third, such as, on the whole, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 5.0 10.4613686534 48% => More to be verbs wanted.
Auxiliary verbs: 8.0 5.04856512141 158% => OK
Conjunction : 6.0 7.30242825607 82% => OK
Relative clauses : 11.0 12.0772626932 91% => OK
Pronoun: 28.0 22.412803532 125% => Less pronouns wanted
Preposition: 45.0 30.3222958057 148% => OK
Nominalization: 7.0 5.01324503311 140% => OK
Performance on vocabulary words:
No of characters: 1668.0 1373.03311258 121% => OK
No of words: 337.0 270.72406181 124% => OK
Chars per words: 4.94955489614 5.08290768461 97% => OK
Fourth root words length: 4.28457229495 4.04702891845 106% => OK
Word Length SD: 2.43176115202 2.5805825403 94% => OK
Unique words: 164.0 145.348785872 113% => OK
Unique words percentage: 0.486646884273 0.540411800872 90% => More unique words wanted or less content wanted.
syllable_count: 509.4 419.366225166 121% => 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: 8.0 8.23620309051 97% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 6.0 2.5761589404 233% => Less preposition wanted as sentence beginnings.
Performance on sentences:
How many sentences: 16.0 13.0662251656 122% => OK
Sentence length: 21.0 21.2450331126 99% => OK
Sentence length SD: 53.6554036771 49.2860985944 109% => OK
Chars per sentence: 104.25 110.228320801 95% => OK
Words per sentence: 21.0625 21.698381199 97% => OK
Discourse Markers: 6.0625 7.06452816374 86% => OK
Paragraphs: 5.0 4.09492273731 122% => OK
Language errors: 8.0 4.19205298013 191% => OK
Sentences with positive sentiment : 7.0 4.33554083885 161% => OK
Sentences with negative sentiment : 5.0 4.45695364238 112% => 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: 0.28443095487 0.272083759551 105% => OK
Sentence topic coherence: 0.112663710275 0.0996497079465 113% => OK
Sentence topic coherence SD: 0.0500543401948 0.0662205650399 76% => OK
Paragraph topic coherence: 0.175189126874 0.162205337803 108% => OK
Paragraph topic coherence SD: 0.0544367888538 0.0443174109184 123% => OK
Essay readability:
automated_readability_index: 12.4 13.3589403974 93% => Automated_readability_index is low.
flesch_reading_ease: 58.62 53.8541721854 109% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 10.3 11.0289183223 93% => OK
coleman_liau_index: 11.43 12.2367328918 93% => OK
dale_chall_readability_score: 8.0 8.42419426049 95% => OK
difficult_words: 71.0 63.6247240618 112% => OK
linsear_write_formula: 11.0 10.7273730684 103% => OK
gunning_fog: 10.4 10.498013245 99% => OK
text_standard: 11.0 11.2008830022 98% => OK
What are above readability scores?
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Write the essay in 20 minutes.
Rates: 73.3333333333 out of 100
Scores by essay e-grader: 22.0 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.