User:Rosemary Guo/Lake Tai/AloofBidoof Peer Review

General info

 * Whose work are you reviewing?

Rosemary Guo


 * Link to draft you're reviewing
 * https://en.wikipedia.org/wiki/User:Rosemary%20Guo/Lake_Tai?veaction=edit&preload=Template%3ADashboard.wikiedu.org_draft_template


 * Link to the current version of the article (if it exists)
 * Lake Tai

Evaluate the drafted changes
Lots of information and overall looks really! Just a few wording issues and spelling, but great job!

Paragraphs

Lake Tai is linked to the renowned Grand Canal and is the origin of a number of rivers, including Suzhou Creek. In recent years, Lake Tai has been plagued by pollution as the surrounding region experienced rapid industrial development. Lake Tai has a quite serious problem on algea bloom due to increase of nutients, such as nitrogen and phosphorus, which lead to a negative effect for the ecosystem of Lake Tai.


 * Put the source at the end of the sentence such as, "Lake Tai is linked to the renowned Grand Canal and is the origin of a number of rivers, including Suzhou Creek ."
 * Spelling
 * "Lake Tai has a quite serious problem on algea bloom due to increase of nutients..."

Lake Tai has had a very serious problem with the eutrophic effect and algae bloom since 1997 and has become an important investigation place for eutrophication in China. Through the monitoring of climates and nutrients elements in Lake Tai from 1995 to 2007, researchers got the data about the "interannual and seasonal variations in the phytoplankton biomass and composition". As a result, they found both climate and nutrients elements played a very important role in algae bloom and the algae composition in different periods (five). From 1992 to 2007 (which cover first two periods), cyanobacteria is the dominant phytoplankton in Lake Tai. In addition, diatoms and cryptophytes also contributed much biomass during 1992-1995, and filamentous joined in from 1996 to 2007. On the other hand, through 2008 to 2010, the abundance of cyanobacteria had decreased. Also, the amount of large diatoms and fast-growing cryptophytes increased at that period, and their biomass become higher than the abundance of cyanobacteria. From 2011 to 2014, cyanobacteria were abundant in Lake Tai and contributed to the most of biomass again, and its biomass were twice larger than the previous periods. the abundance of large diatoms and small-colonial green algae were further increased, but the abundance of cryptophytes were decreased. In the last period (2015-2017), the total biomass of phytoplankton grew rapidly, especially for cyanobacteria (dominating in four seasons) and diatoms (focus on winter and spring).


 * Source at the end of sentence
 * Spelling
 * "Lake Tai has had a very serious problem..."
 * "interannual and seasonal variations in the phytoplankton biomass and composition". If this is a quote make sure to add "...interannual" to indicate it is not the beginning of the sentence being quoted.
 * "researchers got the obtained data about the"
 * "As a result, they found both climate and nutrients elements played a very important role in algae bloom and the algae composition in different periods (five) five different periods."
 * "Lake Tai and contributed to the most of the most to biomass again"
 * "especially for cyanobacteria" remove space between "for" and "cyanobacteria"

Increasing nutrients is one of the most important contributors for eutrophication in Lake Tai and causes pollution. Tracking the amount of nutrients, such as nitrogen (N) and phosphorus (P), can help people know more about eutrophication in Lake Tai. The increase amount of nutrients will increase chlorophyll a concentration in phytoplankton, so it promote the growth of phytoplankton (biomass increase). As a result, the eutrophication gets worse and worse. In one study, researchers collected and analyzed the water quality of Lake Tai and the wastewater treatment plants around it to figure out the trends and causes of nitrogen pollution in Lake Tai. As a result, they found that, in a year, the total nitrogen (TN) concentration is high in winter and spring but low in summer and fall. Also, the highest concentration value appeared in March, and the lowest values appear in September. In addition, since 2001, the TN concentration increased continuously and reached the peak in 2006. After that, the TN concentration started to decline. In spatial variation, the average TN concentration is lower in the areas which are near the center of the lake than the areas which are near the shore, and the highest average TN concentration value appeared in the northern shore of Lake Tai. It indicated that the pollution of Lake Tai was impacted from external factors, such as discharge of the wastewater treatment plants and spreading to the center of lake Tai gradually.


 * Source at the end of the sentence
 * " so it promote promoting the growth of phytoplankton "
 * "the eutrophication gets worse and worse progressively worse."

The main way that lead nutrients flow into Lake Tai is the water discharged from rivers. Knowing the forms and sources of nitrogen and phosphorus in Lake Tai combined with the variable reasons for eutrophication of Lake Tai and the critical loads of variable nutrients for the lake may help people find out the effective solution to increase water quality of Lake Tai. Thus, Wang et al. used the MARINA-Lake model (Model to Assess River Inputs of Nutrients to seAs) to measure the dissolved inorganic and organic N and P discharges from rivers to Lake Tai and used PCLake model to test how much nutrients exported from rivers exceeds critical loads. As a result, researchers found that in 2012, 90% of total dissolved nitrogen (TDN) were diffuse sources exported from rivers, 40% of the diffuse source of rover export came from synthetic fertilizers. For total dissolved phosphorus (TDP), point sources account for 48% of the total TDP drained from river to Lake Tai in 2012, and sewage systems are the main sources of pollution for that. In addition, the actual output of river nutrients exceeds dramatically over the critical loads of Lake Tai, and the river export need to decrease about 46%-92% to back to the critical load of TDN. Also, the river export of TDP need to decrease about 55%-92% to meet critical loads.


 * Source at the end of the sentence
 * "Thus, Wang et al. researchers used" cite the source instead of stating it

Eutrophication also can change the structure of food web in Lake Tai. For the long term eutrophic effect in Lake Tai, its food web was simplified and lost the barycenter of energy exchange. From the 1960s to 1990s, about 14 trophic species in lake Tai were removed from the food web, and in the 2000s, there were less than 50 trophic species left. Also, the ratio of predator and prey was decreased continuously, which indicated the decreasing amount of predators. And the decreasing link density of food web suggested the declining species interactions in Lake Tai through the long term of Eutrophication. However, connectivity properties of food web was not changed too much due to the reduction'''. In addition,''' the energy exchanges barycenter of food web trended to the lower level in Lake Tai. The eutrophic effect caused the extinction or weakness of the top species in Lake Tai due to the lack of energy and enough food sources. Thus, the role of intermediate species in the food web was more weighted because of the lack of predators (top species) and plenty of food (algae bloom due to Eutrophication). In addition, the biomass of producers and herbivores, as well as lower trophic levels, increased dramatically during Eutrophication, but the biomass in upper trophic levels had not particularly changed. Moreover, due to the shortening of food chains, the ability of the food web that transfer energy to the upper levels was also decreased.


 * Source at the end of sentence
 * "n. In addition, th" remove space before "in addition"

References


 * sources look good and are recent which is great!