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.
The reading and lecture are both about the management of the rampant growth of zebra mussel. The author of the reading feels that this mussel was difficult to control, have a good colonizing ability. The lecturer challenges on claim made by the author. He asserts that this condition prevails only in the past while people were ignorant, and now the case is totally different.
To begin with, the reading says that the increasing condition of the mussel is inevitable. This is because it has the ability to move by being attached to the bottom of ships and could survive in the water, known as ballast water. However, the lecturer refutes it by saying that this zebra mussel would not be able to survive in the ocean water. He mentions that this water is salty, and as a result, it would kill the zebra mussel.
Secondly, the writer claims that zebra mussels were highly pervasive in nature, which can make a shadow to the other organism. Moreover, it noticed that these animals have higher fertility and adaptability. The speaker offered a counterargument and points out that these animals do not have predators only in the present, however, there is a lot at the instant. He elaborated it that in Europe, these animals were noticed by birds; consequently, it starts to prey it. Thus, it is unlikely to say that these animals did not have any type of predators.
Finally, the author posits that there is a decreasing trend of fish population because of planktons were eaten by mussels. It describes that fish has to compete for food with mussel. On the contrary, the professor opposes on it by explaining that the overall population of fish would be increased, as there is a negative impact on only a certain fish, however, others were benefitted too. According to him," there would increase in the nutrient at bottom level of the pond, which enhances the growth of bottom-feeder fish".
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Grammar and spelling errors:
Line 1, column 201, 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.
...ontrol, have a good colonizing ability. The lecturer challenges on claim made by th...
^^^
Line 4, column 405, Rule ID: COMMA_PARENTHESIS_WHITESPACE
Message: Put a space after the comma
Suggestion: , &apos
...rs were benefitted too. According to him,' there would increase in the nutrient a...
^^^^^^
Transition Words or Phrases used:
consequently, finally, however, if, moreover, second, secondly, so, thus, while, as to, as a result, on the contrary, to begin with
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 18.0 10.4613686534 172% => OK
Auxiliary verbs: 6.0 5.04856512141 119% => OK
Conjunction : 6.0 7.30242825607 82% => OK
Relative clauses : 15.0 12.0772626932 124% => OK
Pronoun: 36.0 22.412803532 161% => Less pronouns wanted
Preposition: 45.0 30.3222958057 148% => OK
Nominalization: 6.0 5.01324503311 120% => OK
Performance on vocabulary words:
No of characters: 1576.0 1373.03311258 115% => OK
No of words: 325.0 270.72406181 120% => OK
Chars per words: 4.84923076923 5.08290768461 95% => OK
Fourth root words length: 4.24591054749 4.04702891845 105% => OK
Word Length SD: 2.63450027823 2.5805825403 102% => OK
Unique words: 166.0 145.348785872 114% => OK
Unique words percentage: 0.510769230769 0.540411800872 95% => More unique words wanted or less content wanted.
syllable_count: 504.0 419.366225166 120% => OK
avg_syllables_per_word: 1.6 1.55342163355 103% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 10.0 3.25607064018 307% => Less pronouns wanted as sentence beginning.
Article: 9.0 8.23620309051 109% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 2.0 1.51434878587 132% => OK
Preposition: 3.0 2.5761589404 116% => OK
Performance on sentences:
How many sentences: 17.0 13.0662251656 130% => OK
Sentence length: 19.0 21.2450331126 89% => OK
Sentence length SD: 36.4532216716 49.2860985944 74% => OK
Chars per sentence: 92.7058823529 110.228320801 84% => OK
Words per sentence: 19.1176470588 21.698381199 88% => OK
Discourse Markers: 7.70588235294 7.06452816374 109% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 2.0 4.19205298013 48% => OK
Sentences with positive sentiment : 6.0 4.33554083885 138% => OK
Sentences with negative sentiment : 2.0 4.45695364238 45% => More negative sentences wanted.
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: 0.10927912037 0.272083759551 40% => OK
Sentence topic coherence: 0.0375043516889 0.0996497079465 38% => Sentence topic similarity is low.
Sentence topic coherence SD: 0.0339549296147 0.0662205650399 51% => OK
Paragraph topic coherence: 0.0667365716219 0.162205337803 41% => OK
Paragraph topic coherence SD: 0.0387015795044 0.0443174109184 87% => OK
Essay readability:
automated_readability_index: 11.0 13.3589403974 82% => Automated_readability_index is low.
flesch_reading_ease: 52.19 53.8541721854 97% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 10.7 11.0289183223 97% => OK
coleman_liau_index: 10.85 12.2367328918 89% => OK
dale_chall_readability_score: 8.51 8.42419426049 101% => OK
difficult_words: 81.0 63.6247240618 127% => OK
linsear_write_formula: 8.0 10.7273730684 75% => OK
gunning_fog: 9.6 10.498013245 91% => 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: 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.