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 both about zebra mussels invasion effects on its new habitat's fresh water fish and its possible control in new environment. Whereas, the reading states that it is impossible to control it and on its invasion, likely disappearance of fresh water fish of that area, the lecture dismisses the claim of the article and provides three compelling reasons for its successful control.
First of all, according to the reading, zebra muscle invasion seems unstoppable from the past as it can survive and spread through even from 'Blast water' of the ship which was used for the ship balance. However, the lecture disputes this point. although the lecturer concedes that it was impeccable in past but, only due to lack of knowledge of how to control it. Furthermore, he says that now, it can traced down by replacing water of ship in ocean in where it cannot survive.
Secondly, the reading states that it is dominant in new place due to its hardy nature, high reproduction rate and not having predator to check its population. Nevertheless, the lecture refutes this argument. he argues that it was the case in beginning of the spread of zebra muscle but, now situation is changed against it. In addition, many aquatic birds have begun to start feed on them.
Lastly, the reading claims as it feeds on phytoplankton that source of food of the fresh fish population, whole fish population goes down. On the other hand, the lecture believe that it indeed eats plankton but provide food for the fish lives in deeper part of the water. Moreover, even the population of one species will decline, it will help to increase the fish population of other species.
In conclusion, although the reading and lecture both about zebra musle invasion effects on its new habitat's fresh water fish and its possible control in new environment, the three points in reading effectively challenged by the lecture.
Grammar and spelling errors:
Line 7, column 245, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: Although
...wever, the lecture disputes this point. although the lecturer concedes that it was impec...
^^^^^^^^
Line 7, column 402, Rule ID: DID_BASEFORM[1]
Message: The verb 'can' requires the base form of the verb: 'trace'
Suggestion: trace
.... Furthermore, he says that now, it can traced down by replacing water of ship in ocea...
^^^^^^
Line 13, column 209, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: He
...ess, the lecture refutes this argument. he argues that it was the case in beginnin...
^^
Transition Words or Phrases used:
but, first, furthermore, however, lastly, moreover, nevertheless, second, secondly, so, whereas, in addition, in conclusion, first of all, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 6.0 10.4613686534 57% => More to be verbs wanted.
Auxiliary verbs: 5.0 5.04856512141 99% => OK
Conjunction : 11.0 7.30242825607 151% => OK
Relative clauses : 10.0 12.0772626932 83% => OK
Pronoun: 34.0 22.412803532 152% => Less pronouns wanted
Preposition: 52.0 30.3222958057 171% => OK
Nominalization: 13.0 5.01324503311 259% => Less nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1613.0 1373.03311258 117% => OK
No of words: 322.0 270.72406181 119% => OK
Chars per words: 5.00931677019 5.08290768461 99% => OK
Fourth root words length: 4.23607819155 4.04702891845 105% => OK
Word Length SD: 2.59455833579 2.5805825403 101% => OK
Unique words: 161.0 145.348785872 111% => OK
Unique words percentage: 0.5 0.540411800872 93% => More unique words wanted or less content wanted.
syllable_count: 481.5 419.366225166 115% => 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: 9.0 8.23620309051 109% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 4.0 2.5761589404 155% => OK
Performance on sentences:
How many sentences: 14.0 13.0662251656 107% => OK
Sentence length: 23.0 21.2450331126 108% => OK
Sentence length SD: 60.7155041895 49.2860985944 123% => OK
Chars per sentence: 115.214285714 110.228320801 105% => OK
Words per sentence: 23.0 21.698381199 106% => OK
Discourse Markers: 11.1428571429 7.06452816374 158% => OK
Paragraphs: 5.0 4.09492273731 122% => OK
Language errors: 3.0 4.19205298013 72% => 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: 2.0 4.27373068433 47% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.14698433808 0.272083759551 54% => OK
Sentence topic coherence: 0.0534489860465 0.0996497079465 54% => OK
Sentence topic coherence SD: 0.0400922585096 0.0662205650399 61% => OK
Paragraph topic coherence: 0.0858686442986 0.162205337803 53% => OK
Paragraph topic coherence SD: 0.0324076806619 0.0443174109184 73% => OK
Essay readability:
automated_readability_index: 13.7 13.3589403974 103% => OK
flesch_reading_ease: 56.59 53.8541721854 105% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 11.1 11.0289183223 101% => OK
coleman_liau_index: 12.07 12.2367328918 99% => OK
dale_chall_readability_score: 8.26 8.42419426049 98% => OK
difficult_words: 71.0 63.6247240618 112% => OK
linsear_write_formula: 18.0 10.7273730684 168% => OK
gunning_fog: 11.2 10.498013245 107% => OK
text_standard: 12.0 11.2008830022 107% => OK
What are above readability scores?
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Write the essay in 20 minutes.
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.