On August 25, 2021, when a volunteer service team in Shenyang was patrolling along the HunHe River, volunteer swallows found several near-transparent flocculent creatures that someone had just fished from the Hun River, looking like a jellyfish!
Peach blossom jellyfish in a mineral water bottle
Swallow has been engaged in wildlife protection for many years, she is keenly aware that this flocculent creature may be China's protected animal peach blossom jellyfish, but in the swallow's impression, peach blossom jellyfish are generally in Jiangnan waters, where is this big northeast peach blossom jellyfish? Instantly, Swallow couldn't believe his judgment a bit!
According to the identification of Han Xiaohu, a teacher from the College of Animal Science and Veterinary Medicine of Shenyang Agricultural University, these white transparent creatures found in the HunHe River are 99% similar to the Peach Blossom Jellyfish found in the waters of Zhejiang Province! According to this identification feature, it can be determined that the fishing in the Hun River should be the Peach Blossom Jellyfish of Suo's, which is a major discovery!
<h1 class="pgc-h-arrow-right" Data-track="4" Why do peach blossom jellyfish > warm waters appear in the Great Northeast? </h1>
Peach blossom jellyfish is a small jellyfish living in freshwater, with a diameter of about 1.5 to 2 centimeters, many tentacles, and completes reproduction in the form of budding. This invertebrate first appeared 550 million years ago, is called a living fossil, and because of its graceful posture, it is of great research and ornamental value.
The genus Peach Blossom Jellyfish was first established in 1880 by naturalist E. Thompson. R. Lanxster found peach blossom jellyfish in Britain, and China also found this jellyfish in Yichang in 1907, but as early as the thirty-seventh year of the Ming Wanli Calendar (1609) in China, there was a record of "peach blossom fish" in the "Guizhou Chronicle", symbolizing love, which is the world's earliest peach blossom jellyfish record.
There are a total of 11 kinds of peach blossom jellyfish found in the world, namely Suo's peach blossom jellyfish, Ise peach blossom jellyfish, Chinese peach blossom jellyfish, Leshan peach blossom jellyfish, Hangzhou peach blossom jellyfish, Xinyang peach blossom jellyfish, Sichuan peach blossom jellyfish, Zigui peach blossom jellyfish, Chuxiong peach blossom jellyfish, short-handed peach blossom jellyfish, look at the name also know that There are more types in China.
Among them, Yichang peach blossom jellyfish, Xinyang peach blossom jellyfish and short-handed peach blossom jellyfish have been listed in the national red list of endangered animals, the highest level - critically endangered species, while Hangzhou peach blossom jellyfish, Leshan peach blossom jellyfish, Sichuan peach blossom jellyfish, Chinese peach blossom jellyfish and Chuxiong peach blossom jellyfish have also been listed in the endangered level.
Sox's peach blossom jellyfish is the most widely distributed, almost global distribution, such as 43 out of 50 states in the United States reported the discovery of Sox's peach jellyfish. In China, it is mainly distributed in Sichuan, Hubei, Jiangsu, Zhejiang, Fujian and Guangdong, and the northernmost place of discovery has only been recorded in Beijing.
This time appeared in Shenyang Hunhe, but also let Han Xiaohu teacher shocked, and peach blossom jellyfish on the water quality requirements of this feature, almost become the standard of water quality identification, as long as there are peach blossom jellyfish living areas, then its water quality has reached a considerable extent, this feature also makes the water quality in many areas deteriorate after the peach blossom jellyfish is endangered.
Water quality can be improved after treatment, but the climate is a hard indicator, because the northeast waters are too cold, peach blossom jellyfish can not survive, and this time can easily catch peach blossom jellyfish in the Hun River, which means that the population size has been formed, is the north really warming?
<h1 class="pgc-h-arrow-right" data-track="5" > global warming: is the north of China really warming? </h1>
On August 21, 2021, Xiaoxiang Morning Post reported that the Miyun District of Beijing recently conducted a survey of wild plant diversity in the upper reaches of the reservoir and found a very rare wild plant of the strychnidae in North China.
This plant looks very ordinary, thrown in the grass pile no one pays attention at all, but this grass has certain requirements for the precipitation of the growth area, basically distributed in Shandong, Jiangsu, Fujian, Taiwan, Guangdong, Hainan and other areas.
Therefore, the discovery of the sharp hat grass has caused a wave of discussion: "The first discovery of the sharp hat grass in Beijing, the chinese precipitation is moving north, and the north has become a sign of the south?" "Or there are a lot of articles with similar titles, and in fact it is true that precipitation in the north is really increasing!"
1. According to the records of the Xinjiang Meteorological Bureau, the average annual precipitation from 2011 to 2018 increased by 43 mm compared with 1961 to 1970, an increase of 30%, and the temperature is also rising, at a rate of 0.3 °C in 10 years, higher than the national average of 0.24 °C!
2. Pan Hongxing, a first-level researcher at the Department of Desertification Control of the State Forestry and Grassland Administration, also said that in the past 20 years, the rainfall in the main sand and dust source areas in northern China has increased by an average of about 20%. In recent years, the temperature in northwest China has been high and the amount of precipitation has increased, which is conducive to the restoration of vegetation.
The rise in temperature in the north has become a foregone conclusion, and the reasons are also from the warming of the global environment, and the reasons for the increase in precipitation are diverse, such as the northward migration of the precipitation belt, the increase in evaporation of the European continent brought in by the westerly wind belt, and the increase in meltwater on the Qinghai-Tibet Plateau. But the results all point to one, and the north is getting warmer and wetter.
Although the future direction is uncertain, this trend seems to be happening! So what about the GreatEr Northeast? In the Journal of Applied Meteorology of the Chinese Academy of Meteorological Sciences, there was a paper in 2007 that the reduction trend of the total rainy days in the northeast was very obvious, but the annual precipitation intensity was a clear enhancement trend, mainly reflected in the increase in the intensity of light rain and heavy rain, indicating that extreme rainfall weather had increased.
In 2013, the second issue of the Journal of Ecology published a paper titled Temperature and Precipitation Trends in Northeast China from 1961 to 2005, which said that it studied climate change and mutations in Northeast China in the past 45 years. The results show that the annual average temperature in Northeast China has changed between 2.45 and 5.72 °C in the past 45 years.
The average temperature in spring and winter began to warm in 1981-1990, and the average temperature in summer and autumn began to warm in 1991-2000. The temperature warming in the northeast region increases with the increase of latitude, the northern part of the Daxing'anling Mountains and the Xiaoxing'anling area are the most obvious warming areas, and the areas with smaller warming ranges are the Liaohe Plain, the Liaodong Peninsula and the southern part of the Changbai Mountains.
A paper titled "The Impact of Future Climate Change on Agroclimate Resources in Northeast China" in the 2017 "Journal of Geography" said that from 91 meteorological stations in northeast China from 1961 to 2010, the observation data of 91 meteorological stations in northeast China increased significantly, and the overall development of northeast china in the future was warm and humid.
However, from the perspective of temperature rise, this temperature change is not enough to change the living environment of peach blossom jellyfish, so Han Xiaohu, a teacher at the College of Animal Science and Veterinary Medicine of Shenyang Agricultural University, also proposed a possibility that these peach blossom jellyfish may be brought by free-range pets.
Because the peach blossom jellyfish larvae can be in the body of turtles and fish, if it exists in this way, then it will cease to exist after this summer, if it is to survive in a natural state, then at this time next year, a large number of peach blossom jellyfish can still be found, but Han Xiaohu teacher also said that when he is cold in winter, the peach blossom jellyfish becomes a very small hydra state for hibernation, but the probability is very low.
reference:
https://m.hanspub.org/journal/paper/43967
http://www.geog.com.cn/article/2017/0375-5444/0375-5444-72-7-1248.shtml
http://www.cqvip.com/qk/90772x/201302/44574669.html
http://www.jms1980.com/ch/reader/create_pdf.aspx?file_no=20170115&year_id=2017&quarter_id=1&falg=1