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 inthe past strongly suggests that the species will soon colonize all of North America. Moreover, once zebra mussels are carried to a new habitat, theycan 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 the lecture both discuss the Zebra Mussel population that reaches the North America. While the reading states that these Mussels cannot be stopped which have great impact on populations of fish water fish. The lecture argues that by states that the invasion can be control.
First, the reading mention that ships help in spreading of Mussel from Europe to North America as the mussel catch the ship and survive in ballast water. The lecture refutes this point by states that this method of how the mussel get invade the North America is not clear as when the mussel travel with the ship they take water from Europe to North America full with mussel and it not required to ship to take the water and water is salt which kill the mussel.
Secondly, as mussel been carried to new habitat they can dominant there and they can with stand harsh conditions but the lecture cast doubt on this claim by says that this process will occur only in the beginning and Europe is had local birds that can change their habitat as they was eat less amount of mussel, eventually, they can eat more now.
Lastly, the reading claims that mussel more likely to cause reduction in fish population where they become dominant. Moreover, as the mussel is plankton eater they will compete with the fish for the nutrition. The lecture argues this point by pointed out that as plankton eater it will have a negative impact but, at the same time have a positive one by provide a nutrient to the field of bottom fish.
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- A huge marine mammal known as Steller’s sea cow once lived in the waters around Bering Island off the coast of Siberia. It was described in 1741 by Georg W. Steller, a naturalist who was among the first European to see one. In 1768 the animal became ext 78
Grammar and spelling errors:
Line 1, column 102, Rule ID: SENTENCE_FRAGMENT[1]
Message: “While” at the beginning of a sentence requires a 2nd clause. Maybe a comma, question or exclamation mark is missing, or the sentence is incomplete and should be joined with the following sentence.
...ulation that reaches the North America. While the reading states that these Mussels c...
^^^^^
Line 3, column 286, Rule ID: BEEN_PART_AGREEMENT[1]
Message: Consider using a past participle here: 'eaten'.
Suggestion: eaten
...at can change their habitat as they was eat less amount of mussel, eventually, they...
^^^
Transition Words or Phrases used:
but, first, lastly, moreover, second, secondly, while
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 8.0 10.4613686534 76% => OK
Auxiliary verbs: 9.0 5.04856512141 178% => OK
Conjunction : 8.0 7.30242825607 110% => OK
Relative clauses : 14.0 12.0772626932 116% => OK
Pronoun: 26.0 22.412803532 116% => OK
Preposition: 31.0 30.3222958057 102% => OK
Nominalization: 5.0 5.01324503311 100% => OK
Performance on vocabulary words:
No of characters: 1240.0 1373.03311258 90% => OK
No of words: 268.0 270.72406181 99% => OK
Chars per words: 4.62686567164 5.08290768461 91% => OK
Fourth root words length: 4.04607285448 4.04702891845 100% => OK
Word Length SD: 2.0392396995 2.5805825403 79% => OK
Unique words: 133.0 145.348785872 92% => More unique words wanted.
Unique words percentage: 0.496268656716 0.540411800872 92% => More unique words wanted or less content wanted.
syllable_count: 378.9 419.366225166 90% => OK
avg_syllables_per_word: 1.4 1.55342163355 90% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 1.0 3.25607064018 31% => OK
Article: 6.0 8.23620309051 73% => OK
Subordination: 3.0 1.25165562914 240% => Less 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: 29.0 21.2450331126 137% => The Avg. Sentence Length is relatively long.
Sentence length SD: 92.52146898 49.2860985944 188% => OK
Chars per sentence: 137.777777778 110.228320801 125% => OK
Words per sentence: 29.7777777778 21.698381199 137% => OK
Discourse Markers: 5.88888888889 7.06452816374 83% => 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 : 3.0 4.45695364238 67% => 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: 0.203693697794 0.272083759551 75% => OK
Sentence topic coherence: 0.0921365918664 0.0996497079465 92% => OK
Sentence topic coherence SD: 0.0525351129994 0.0662205650399 79% => OK
Paragraph topic coherence: 0.121862038868 0.162205337803 75% => OK
Paragraph topic coherence SD: 0.0543181956823 0.0443174109184 123% => OK
Essay readability:
automated_readability_index: 15.3 13.3589403974 115% => OK
flesch_reading_ease: 58.96 53.8541721854 109% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 12.2 11.0289183223 111% => OK
coleman_liau_index: 10.17 12.2367328918 83% => OK
dale_chall_readability_score: 8.08 8.42419426049 96% => OK
difficult_words: 51.0 63.6247240618 80% => More difficult words wanted.
linsear_write_formula: 11.0 10.7273730684 103% => OK
gunning_fog: 13.6 10.498013245 130% => OK
text_standard: 11.0 11.2008830022 98% => OK
What are above readability scores?
---------------------
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.