Yangtze River Daily Great Wuhan Client (Reporter Guo Keying, Correspondent Zhao Huijuan) The entrance of Huanglingjizha of Dongjing River in Caidian District, Wuhan City is located in the lower reaches of Shenhu Wetland and is also the inlet of the Yangtze River . There is a river beach here, with green grass, water birds, and benthic animals , which attracts many tourists to come here to take photos and check in. On the 4th, Wuhan youths entered the wetlands for study and education activities. "Little Wetland Guards" were invited to this river beach to search and observe the common river clams on the spot.
The little guard in the wetland personally dug the river clams.
The river clams in the water "rush" to the ashore. Children dig up enough
at one time. As the most common type of mollusk in streams and river ponds, the figures of river clams are spread all over my country. "There are more than 100 kinds of river clams in China, and there are more than a dozen types of Dongjinghe , which belong to an area with very lush species of river clams." Xingchen, the natural mentor of the "Little Wetland Guards", stood by the river beach and told him. Although river clams are common, they are already endangered. Since the 20th century, river musses have significantly disappeared around the world. "When it comes to common river musses, there are 20 to 30 species in China, but 70% of them are in endangered or extremely dangerous states, and may even be extinct."
is endangered, so it needs to be understood urgently. Xingchen took out a piece of paper, with photos and corresponding signatures of more than a dozen types of river clams on it. "Because this year is drought, the river clams that live in the underwater riverbed have died of sunshine because the clam shells are thick and cannot move when the water recedes, so we can easily dig them in the mud by the river. The most common one is the folded crest clam , the most easy to find pearls, the Huawu-tooth clam , the Huawu-tooth clam without 'teeth'..." Xingchen told the children that there are three types of clams with very distinctive appearance, namely the sword-shaped spear clam, the short-folded spear clam and the twisted spear clam, which are nicknamed the "Three Brothers of Spear clams". "Today's experience of our field inspection is to dig the clam shells to see if you can dig these unusual spear clams."
Nature instructor Xingchen introduced common river clams.
"What is this twisting river clam?" , second grader, , Qu Simiao, holding the clam in his hand, which was still dipped in the soil, excitedly showed it to Xingchen. When she was told that this was one of the "Three Spears and Clams Brothers", she screamed excitedly, and after a while she lowered her head to continue digging the "treasure". Perhaps these three types of clams were once very close to the riverbed. In less than 20 minutes, Qu Simiao dug out all three types of spears and clams and put them into the bucket.
Other "wetland little guards" have also dug up clams with folded patterns that are bigger than their faces, and even ray-breaking ridge clams that are not mentioned on the paper. Although river clams live here, their ecological niches are different. "For example: the sword-shaped spear clam lives at the bottom of the water about 10 meters away from the water surface, the short-pleated spear clam is about 5 meters under the water, while the twisted spear clam lives 1 to 2 meters away from the water surface. In addition, the spinnaker clam and the dome bead clam are closest to the water surface of the river beach, so it is easier to dig." Xingchen reveals the reasons why the "three brothers of spear clams" are not easy to find.
"Snipe and clam fight" is also a manifestation of ecological chain balance
"There are many river clams in a place, which means that the ecological environment here is very good." The nature tutor gave an example of the idiom "Snipe and clam fight" in front of the car. "In addition to the water birds and benthic river clams, there is actually a kind of fish stinky. The stinky has an interbreeding relationship with the river clams. During the breeding period, the river clams will open the shell and clams. Hold the head of the sams and spray the baby - the hook-in larvae on the gills to help breed offspring; in turn, the sams will parasitize its babies into the river clams, and they raise each other's babies. When the sams opened the shell, they were caught by the snipe, putting their pointed mouth into the shell, wanting to eat soft meat. At this time, the sam quickly closed the shell for self-protection. "
The little guard in the wetland dug a river clam bigger than his face on the river beach.
In front of the car, tell everyone that this scene was seen by the ancients, so there was "a snipe and clam fight, and the fisherman gained profits."A good ecological environment not only has clear rivers and dense aquatic plants, but also reflects the biodiversity of . "Aquatic plants, birds, fish, and river mussels jointly achieve the dynamic balance of the ecological chain. "
What kind of river clams are dug by the little guard of the nature mentor Xingchen Science and Technology Wetland?
" Today I not only met the common river clams, but also dug a lot of clam shells. Such a cute creature deserves the best living environment. "Qu Simiao's mother suggested that the "little wetland guards" can also go to the river beach regularly to pick up the domestic waste left by tourists, and promote the necessity and methods of protecting river clams to everyone, so as to create a good living environment for river clams.
It is understood that the "little wetland guards" in Wuhan's youth entering wetland study and education activities are sponsored by the Wuhan Municipal Garden and Forestry Bureau, Wuhan Municipal Education Bureau, and Wuhan Municipal Committee of the Communist Youth League, and hosted by the Wuhan Forestry Society and Modern Youth Daily.
[Editor: Wang Yiping]
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