In this letter, the author shows us there are significant delcines of amphibians both in the number of spicies and population from 1975 to 2002 om Xanadu Park. Though there is a major decline of the amphbians' poplation worldwide as well as the water and air pollution have already been the worldwide problems, the atuhor concludes another main reason that it is the introduce of trout which are know to eat amphibian eggs triggered the decline of the amphibans in this park. While this reason is not conpelling in that there are some loopholes in this letter, we should reexamine them carefully.
To begin with, the survey of the amphibians in Xanadu Park is not convincing as there are some inaccurate data which need further evidence. Firstly, as we do not know the percentage of the amphibians now compared with the number of 1975, thus we can not conclude how serious the problem is. Secondly, only four species were found while it was seven in 1975, the author does not tell us whether there is some other cases made this decline as there is a possbility that the park is open thus the three spicies moved outside because of the competitions between these amphibian spicies. In order to make this evidence clear, beside more comprehensive data supplied , we need to know whether there are some amphibian spicies living out side this park.
In addtion, as the place of the Xanadu Park is given, whether there are sufficent space of habitats for these seven spicies is in question. If the place is not large enough, due to the possbily once increased population of the amphibians, there would be a severe spicies competitions among them in high possbility. Thus, some comparable weak spicies would extinct or leave this place. So further infromation about this possible competition is needed.
Then even if the author concludes the introducing of trout is the main cause of the declining of amphbian population rather than the worldwide water and air pollution, the evidence is still not compelling. Fitstly, we do not know the change of population of the trout from the introducing to date. Thus we can not conclude the trout benefited from the amphibians even if they like eating their eggs. Maybe there are few trout which means no threatens to the eggs let alone some these dangerous carnivorous spicies. On ther other hand, the worldwide water and air problems may affect the environment of the Xanadu Park, likewise. Maybe as the water polluted, these amphbians would die fast if there is no emergent implements to prevent this accident, the air pollution may also casue the health effect on these animals.
In all, the author's evidence is not convincing to support his idea. More futher evidence are required. Firstly, the author should make a wide survey of the local spicies including the peditors and food supply of theses ampibians ,secondly, the local environment should be examined careully.
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Essay evaluation report
Attribute Value Ideal
Final score: 3.0 out of 6
Category: Satisfactory Excellent
No. of Grammatical Errors: 0 2
No. of Spelling Errors: 0 2
No. of Sentences: 20 15
No. of Words: 491 350
No. of Characters: 2368 1500
No. of Different Words: 224 200
Fourth Root of Number of Words: 4.707 4.7
Average Word Length: 4.823 4.6
Word Length SD: 2.518 2.4
No. of Words greater than 5 chars: 155 100
No. of Words greater than 6 chars: 120 80
No. of Words greater than 7 chars: 87 40
No. of Words greater than 8 chars: 59 20
Use of Passive Voice (%): 0 0
Avg. Sentence Length: 24.55 21.0
Sentence Length SD: 12.102 7.5
Use of Discourse Markers (%): 0.65 0.12
Sentence-Text Coherence: 0.32 0.35
Sentence-Para Coherence: 0.539 0.50
Sentence-Sentence Coherence: 0.16 0.07
Number of Paragraphs: 5 5
Grammar and spelling errors:
Line 1, column 244, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...bians poplation worldwide as well as the water and air pollution have already bee...
^^
Line 1, column 364, Rule ID: A_INFINITVE[1]
Message: Probably a wrong construction: a/the + infinitive
...oncludes another main reason that it is the introduce of trout which are know to eat amphibia...
^^^^^^^^^^^^^
Line 1, column 397, Rule ID: BEEN_PART_AGREEMENT[1]
Message: Consider using a past participle here: 'known'.
Suggestion: known
... it is the introduce of trout which are know to eat amphibian eggs triggered the dec...
^^^^
Line 3, column 661, Rule ID: COMMA_PARENTHESIS_WHITESPACE
Message: Put a space after the comma, but not before the comma
Suggestion: ,
... beside more comprehensive data supplied , we need to know whether there are some ...
^^
Line 3, column 728, Rule ID: OUT_SIDE[1]
Message: Did you mean 'outside'?
Suggestion: outside
...there are some amphibian spicies living out side this park. In addtion, as the place...
^^^^^^^^
Line 7, column 299, Rule ID: SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA[1]
Message: Did you forget a comma after a conjunctive/linking adverb?
Suggestion: Thus,
...the trout from the introducing to date. Thus we can not conclude the trout benefited...
^^^^
Line 9, column 48, Rule ID: ALLOW_TO[1]
Message: Did you mean 'supporting'? Or maybe you should add a pronoun? In active voice, 'convince' + 'to' takes an object, usually a pronoun.
Suggestion: supporting
... the authors evidence is not convincing to support his idea. More futher evidence are requ...
^^^^^^^^^^
Line 9, column 229, Rule ID: COMMA_PARENTHESIS_WHITESPACE
Message: Put a space after the comma, but not before the comma
Suggestion: ,
...tors and food supply of theses ampibians ,secondly, the local environment should b...
^^
Transition Words or Phrases used:
also, first, firstly, if, likewise, may, second, secondly, so, still, then, thus, well, while, as well as, to begin with
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 29.0 19.6327345309 148% => OK
Auxiliary verbs: 12.0 12.9520958084 93% => OK
Conjunction : 6.0 11.1786427146 54% => More conjunction wanted.
Relative clauses : 6.0 13.6137724551 44% => More relative clauses wanted.
Pronoun: 33.0 28.8173652695 115% => OK
Preposition: 56.0 55.5748502994 101% => OK
Nominalization: 19.0 16.3942115768 116% => OK
Performance on vocabulary words:
No of characters: 2430.0 2260.96107784 107% => OK
No of words: 491.0 441.139720559 111% => OK
Chars per words: 4.94908350305 5.12650576532 97% => OK
Fourth root words length: 4.70728369723 4.56307096286 103% => OK
Word Length SD: 2.58801061227 2.78398813304 93% => OK
Unique words: 231.0 204.123752495 113% => OK
Unique words percentage: 0.470468431772 0.468620217663 100% => OK
syllable_count: 760.5 705.55239521 108% => OK
avg_syllables_per_word: 1.5 1.59920159681 94% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 4.0 4.96107784431 81% => OK
Article: 10.0 8.76447105788 114% => OK
Subordination: 5.0 2.70958083832 185% => OK
Conjunction: 0.0 1.67365269461 0% => OK
Preposition: 7.0 4.22255489022 166% => OK
Performance on sentences:
How many sentences: 20.0 19.7664670659 101% => OK
Sentence length: 24.0 22.8473053892 105% => OK
Sentence length SD: 69.644005485 57.8364921388 120% => OK
Chars per sentence: 121.5 119.503703932 102% => OK
Words per sentence: 24.55 23.324526521 105% => OK
Discourse Markers: 6.0 5.70786347227 105% => OK
Paragraphs: 5.0 5.15768463074 97% => OK
Language errors: 8.0 5.25449101796 152% => OK
Sentences with positive sentiment : 5.0 8.20758483034 61% => OK
Sentences with negative sentiment : 9.0 6.88822355289 131% => OK
Sentences with neutral sentiment: 6.0 4.67664670659 128% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.128326934502 0.218282227539 59% => OK
Sentence topic coherence: 0.0395787809773 0.0743258471296 53% => OK
Sentence topic coherence SD: 0.055657425263 0.0701772020484 79% => OK
Paragraph topic coherence: 0.0696128523862 0.128457276422 54% => OK
Paragraph topic coherence SD: 0.0678402084644 0.0628817314937 108% => OK
Essay readability:
automated_readability_index: 14.2 14.3799401198 99% => OK
flesch_reading_ease: 55.58 48.3550499002 115% => OK
smog_index: 8.8 7.1628742515 123% => OK
flesch_kincaid_grade: 11.5 12.197005988 94% => OK
coleman_liau_index: 11.73 12.5979740519 93% => OK
dale_chall_readability_score: 7.95 8.32208582834 96% => OK
difficult_words: 97.0 98.500998004 98% => OK
linsear_write_formula: 18.0 12.3882235529 145% => OK
gunning_fog: 11.6 11.1389221557 104% => OK
text_standard: 12.0 11.9071856287 101% => OK
What are above readability scores?
---------------------
Rates: 66.0 out of 100
Scores by essay e-grader: 4 Out of 6
---------------------
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.