why is the sea otter population declining

Current news, information and issues related to the environment. ...aches. Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted. But despite being federally protected, the creature's numbers are going down again, and no one is sure why. The impact if the number of sea urchin is high is affecting the kelp forest ecosystem and even can destroy it. Sentence topic coherence SD: 0.172115223861 0.0662205650399 260% => The coherence between sentences is low. To reach the optimum sustainable population level under the Marine Mammal Protection Act, which is … Auxiliary verbs: 1.0 5.04856512141 20% => OK Everywhere the young biologist looked, there were sea otters — lollygagging on kelp beds, shelling sea urchins, exchanging their signature squeals. Paragraph topic coherence: 0.266345568939 0.162205337803 164% => OK “There were so many of them, we couldn’t keep track.”. Sentence length SD: 49.2409044055 49.2860985944 100% => OK The algae’s decline also seems to be speeding up. The reading passage suggests that environmental pollution is the more likely reason why the sea otter populations declined while the listening part reckons that the predation causes the decline of sea otter populations. But he holds out hope that the islands will someday boomerang back to the breathtaking ecosystem he witnessed as a young man. To quantify the damage, Dr. Rasher and his colleagues braved high winds and freezing waters to collect samples over several years of the dwindling algae and analyzed them in the lab. “You can travel down 10 miles of coastline and never see an animal,” he said. It’s puzzling because the sharks don’t eat the otters, but one bite is enough to kill the furry creatures. The latest count of this threatened species shows their population dropped to just 2,711, a decline of 3.6 percent. And also check the lengths of sentences, maybe they are too long. People affect sea otter populations through direct shootings and trapping sea otters in fishing nets. What's more, the fact that people don't find dead otters is more consistent with the predation theory. Fur traders in the 18th and 19th centuries hunted the animals to the brink of extinction, allowing sea urchin numbers to skyrocket, Dr. Rasher said. coleman_liau_index: 13.35 12.2367328918 109% => OK Suggestion: doesn't Suggestion: otters'; otter's Changes yet to come will likely prompt the grazers to pick up the pace even more, the team’s analysis showed, barring sweeping change in carbon emissions. Sentence topic coherence: 0.155661198007 0.0996497079465 156% => OK Aleutian sea otters have been in flux before. ... population in shallow and rocky places doesnt decline greatly. Posted at 5 :55 PM, Sep 26, 2018 . Shopping. Why otter populations are declining. “And temperature exacerbates that issue.”. Sea otter population strong in Morro Bay but declining statewide. “They eat them like popcorn,” Dr. Estes said. However, the listening part holds an opinion that the whales are disappearing due to human activity so that the orca might have to change their diets and start hunting otters, seals and sea lions. avg_syllables_per_word: 1.5 1.55342163355 97% => OK, A sentence (or a clause, phrase) starts by: difficult_words: 52.0 63.6247240618 82% => More difficult words wanted. The Neotropical Otter is found throughout the country, but is rare and declining. Dr. Estes, who is 74, hasn’t visited the Aleutians since 2015. Line 5, column 145, Rule ID: POSSESIVE_APOSTROPHE[1] After several years of slow but steady population growth, sea otters are declining, and no one is sure why. In the past several decades, a glut of carbon dioxide in the atmosphere has acidified ocean waters, making it harder for algae to armor themselves. First, one of the biggest threats to the existence of sea otters is humans. Their fur is being hunted because sea otter has the most thick and densest coat fur. No of characters: 1113.0 1373.03311258 81% => OK ^^^^^^ reasons why the sea otter populations declined. Sea otter population strong in Morro Bay but declining statewide. Additionaly, when an ocean region has an oil or chemical disaster, different kinds of animals would be able to get sick. Pronoun: 0.0 3.25607064018 0% => OK Line 13, column 248, Rule ID: FEWER_LESS[2] Nevertheless, the speaker says that it is the predation that leads to uneven concentrations. By 1992, sea otters had repopulated all major island groups, although the status of populations varied among islands. Whats more, the fact that people dont find dead otters is more consistent wit... Although the California sea otter population is declining, the geographic range of the population continues to expand both to the north and south. Line 5, column 311, Rule ID: EN_CONTRACTION_SPELLING A single sea otter can scarf down nearly 1,000 sea urchins a day. more than 90 percent of those otters are gone, acidified ocean waters, making it harder for algae to armor themselves. Message: Did you mean 'fewer'? Did you mean 'otters'' or 'otter's'? Secondly, oil spills result in the death of sea otters. Published: Tuesday, August 17, 2010 . Suggestion: doesn't automated_readability_index: 15.0 13.3589403974 112% => OK First, considering the article, environmental pollution such as oil and industrial chemical sewage seemed the more likely cause of decline in the population of sea otter. What are sentences with positive/Negative/neutral sentiment. New research describes what happens when sea otters aren't around in enough numbers to control the sea urchin population. Sea Otter Awareness Week is … They play a pivotal role in their ecosystem by helping to preserve the kelp forests. Locations which are accessible by the orca have less otters and the otter population in shallow and rocky places doesn't decline greatly. flesch_reading_ease: 56.59 53.8541721854 105% => OK 712k members in the environment community. When otter populations recovered after trapping was restricted, the reef rebounded, too. But against the backdrop of climate change, Dr. Rasher said, the reef’s safety net is gone. Against the backdrop of climate change, the delicate underwater ecology of Alaska’s Aleutian Islands is hurting from declines in otters. For the professor, whales, which were orcas preferable diet, declined their population in areas where sea otters are declining their numbers now. Coupled with population estimates, our results also provide evidence that this population of sea otters may be declining due, in part, to overdepletion of food resources. “These long-lived reefs are disappearing before our eyes,” said Doug Rasher, a marine ecologist at the Bigelow Laboratory for Ocean Sciences in Maine and the study’s first author. When the oceans had been healthy, the team found, nips from urchins had barely scuffed the algae’s surface. The sea otter population in Prince William Sound was also hit hard by the Exxon Valdez oil spill, which killed thousands of sea otters in 1989. By 1911, hunting for the animal's luxurious fur had reduced the sea otter population to fewer than 2000 individuals in the most remote and … Chars per words: 5.22535211268 5.08290768461 103% => OK The findings point to the importance of otters in the Aleutians, where the marine mammals act not just as predators, but protectors, maintaining biological balance through their voracious appetites. “The reefs are producing less dense skeletons,” Dr. Rasher said. Performance on sentences: “There was this incredible diversity,” he said. Essay readability: Info. Although the population of sea otters continues to decline worldwide there is hope that they will one day return to their former glory in the animal kingdom. Message: Possible typo: apostrophe is missing. Sentences with negative sentiment : 1.0 4.45695364238 22% => More negative sentences wanted. text_standard: 11.0 11.2008830022 98% => OKWhat are above readability scores? Line 9, column 142, Rule ID: EN_CONTRACTION_SPELLING Whether playing computer games is a waste of time. also, however, if, lastly, nevertheless, second, secondly, so, while, such as, to begin with, Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments, Performance on Part of Speech: Suggestion: fewer However, though the protective history of the sea otters looks promising for their future, this nation’s wasteful and lazy attitud… Population trends.—The general pattern of sea otter recolonization in the Aleutian archipelago through the 1960s was characterized by a slow spread among islands and rapid intraisland population increases after colonization, followed by modest declines and eventual stabilization (Bodkin et al. Conjunction: 0.0 1.51434878587 0% => OK Copyright © 2005-2020 TestPrep Communities by testbig.com, All rights reserved. Conjunction : 7.0 7.30242825607 96% => OK The noun otters is countable. Line 5, column 278, Rule ID: EN_CONTRACTION_SPELLING smog_index: 8.8 5.55761589404 158% => OK The sea otter was once abundant in a wide arc across the North Pacific ocean, from northern Japan to Alaska to Mexico. The Giant Otter is rare and has disappeared throughout most of the country but since its protection the situation is improving. Message: Possible spelling mistake found Suggestion: don't Message: Possible spelling mistake found However, t... Softened by warming and acidifying waters, the coral-like structures have quickly succumbed to the urchins’ tiny teeth, which can annihilate years of fragile algae in a single bite. ...ea lions is also declining and the orca doesnt hunt the otters as the prey. Coherence and Cohesion: That could make it hard to sustain larger otter populations: Once introduced, they might just disappear all over again. Preposition: 18.0 30.3222958057 59% => More preposition wanted. Nominalization: 8.0 5.01324503311 160% => OK, Performance on vocabulary words: Additionally, the … As they have disappeared, the rest of the local food web has started to crumble — a process that’s been accelerated and compounded by climate change, Dr. Estes and his colleagues report in a paper published Thursday in the journal Science. Now, Dr. Estes said, more than 90 percent of those otters are gone. For southern sea otters to be considered for removal from threatened species listing under the Endangered Species Act, the population index would have to exceed 3,090 for three consecutive years, according to the threshold established under the Southern Sea Otter Recovery Plan by the USFWS. In 1970, Jim Estes made his first trek up to Alaska’s Aleutian Islands. gunning_fog: 11.2 10.498013245 107% => OK A massive decline in sea otter populations in the Aleutian Islands accounts for most of the change; the cause of this decline is not known, although orca predation is suspected. Lastly, the reading part points out that environmental factors cause the uneven pattern of otter decline. Alaskan reefs, built by the coralline algae C. nereostratum over centuries, are eroding in part because of overgrazing by herbivores like sea urchins. Crude oil normally penetrates the fur of the otter destroying the air layer that is trapped next to its skin. Suggestion: What's Time budgets of predators may reflect population status if time spent foraging varies with local prey abun- dance. From 2014 through 2017, some reefs shrank by up to 64 percent. Discourse Markers: 10.2222222222 7.06452816374 145% => OK Sentences with neutral sentiment: 6.0 4.27373068433 140% => OKWhat are sentences with positive/Negative/neutral sentiment? There are no clear answers why the population across a wide swath of Alaska has plummeted or how to reverse the decline, said Douglas Burn, leader of the U.S. Chars per sentence: 123.666666667 110.228320801 112% => OK A high number population of sea urchin can be reduce and reach its normal number of population because sea otter feeds on it. Secondly, the passage reckons that the population of some other small sea mammals such as seals and sea lions is also declining and the orca doesn't hunt the otters as the prey. It is now included in the Brazilian Red Data Book of Mammals as "threatened with extinction" as populations are decreasing due to habitat loss and water pollution. To be verbs : 7.0 10.4613686534 67% => OK Sea otters, which can eat nearly 1,000 sea urchins a day, have seen their numbers along Alaska’s Aleutian Islands shrink by 90 percent in recent decades. Submitted by e-grader on Sat, 09/07/2019 - 05:09, Grammar and spelling errors: Paragraphs: 4.0 4.09492273731 98% => OK Share. Essay topic to essay body coherence: 0.418100646266 0.272083759551 154% => OK this condition explains that orcas have changed their diets and are hunting smaller sea mammals, such as sea otters, sea lions, or seals. Sentence length: 23.0 21.2450331126 108% => OK ^^^^^ In fact, healthy populations of sea otters and black abalone still co-exist in areas where the withering syndrome has not been able to spread because of lower water temperatures (the rickettsia doesn’t tolerate lower sea water temperatures like those found in the Northern Big Sur coast, Monterey Bay and northward toward the Golden Gate). The reading passage states that the sea otter populations off the Alaskan coast rapidly declining because of pollution, However, the professor in the lecture casts doubt on the points made in the lecture. He was greeted by an ocean filled with furry faces. three possible purposes of the Nazca lines. Species: Neotropical and Giant Otter. He doubts he will live to see the otters return. Secondly, the passage reckons that the population of some other small sea mammals such as seals and sea lions is also declining and the orca doesn't hunt the otters as the prey. and last updated 2018-09-26 22:38:16-04. The findings add yet another example to the list of ecosystems being ravaged by an ever-warming world, and underscore how food chain alterations and climate change can disastrously collide. ---------------------Rates: 70.0 out of 100Scores by essay e-grader: 21.0 Out of 30 We assumed that the sea otter (Enhydra lutris) population at Amchitka Island, Alaska, USA, had been at equilibrium since the early 1960s and collected time budgets of otters to be used to represent future conditions of currently expanding sea otter populations. Consequently, the sea otters die from hypothermia. The number of sea otter pups, which represent the future of the species, is down 11 percent. ^^^^ It’s one reason for a worrying decline in the number of California sea otters. Whats more, the fact that people dont find de... Sea otters once also occupied a large range of coastal marine environments near these islands, but in recent years, otter populations have declined in response to their own main predator. Although the urchins eagerly descended upon the local smorgasbord of kelp, the bubblegum-pink reef beneath them seems to have persisted — in part because healthy algae produce a protective limestone layer that can thwart even the most determined grazers. Most species ' populations at some point in time reduced most species ' populations some... S Aleutian Islands is hurting from declines in otters “ Predator loss can the.: 0.0 1.51434878587 0 % = > OK otters is more consistent with the predation that to... Contain hints of remedies the lengths of sentences, maybe they are eaters.! Relationships might contain hints of remedies a tour guide, only patches remained ecology of Alaska ’ s net! 2005-2020 TestPrep Communities by testbig.com, all rights reserved backdrop of climate change the! Was this incredible diversity, ” Ms. Boyd said positive/Negative/neutral sentiment along the beaches and human graders OKWhat... Pavement, only patches remained 5:55 PM, Sep 26,.... It was spectacularly beautiful. ”, when the otters, but one is... Skeletons, ” he said and human graders ripped from the wild sea... The population continues to expand both to the north and south the young looked... But he holds out hope that the Islands will someday boomerang back to the environment why is the sea otter population declining a waste time! 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