Xinghua Bay Research Articles

Uncovering paleoenvironmental evolution in Xinghua Bay of Southern China during the mid-to-late Holocene, insights from studies of biogeochemical elements in sediments

Uncovering paleoenvironmental evolution in Xinghua Bay of Southern China during the mid-to-late Holocene, insights from studies of biogeochemical elements in sediments

Characteristics of Clay Minerals in Sediments of Xinghua Bay and Nanri Channel in Fujian Province and Their Paleoenvironmental Significance

Characteristics of Clay Minerals in Sediments of Xinghua Bay and Nanri Channel in Fujian Province and Their Paleoenvironmental Significance

In-situ direct seawater electrolysis using floating platform in ocean with uncontrollable wave motion

Direct hydrogen production from inexhaustible seawater using abundant offshore wind power offers a promising pathway for achieving a sustainable energy industry and fuel economy. Various direct seawater electrolysis methods have been demonstrated to be effective at the laboratory scale. However, larger-scale in situ demonstrations that are completely free of corrosion and side reactions in fluctuating oceans are lacking. Here, fluctuating conditions of the ocean were considered for the first time, and seawater electrolysis in wave motion environment was achieved. We present the successful scaling of a floating seawater electrolysis system that employed wind power in Xinghua Bay and the integration of a 1.2 Nm3 h−1-scale pilot system. Stable electrolysis operation was achieved for over 240 h with an electrolytic energy consumption of 5 kWh Nm−3 H2 and a high purity (>99.9%) of hydrogen under fluctuating ocean conditions (0~0.9 m wave height, 0~15 m s−1 wind speed), which is comparable to that during onshore water electrolysis. The concentration of impurity ions in the electrolyte was low and stable over a long period of time under complex and changing scenarios. We identified the technological challenges and performances of the key system components and examined the future outlook for this emerging technology.

Current water pollution status at an important wintering site of the black-faced spoonbill Platalea minor in Xinghua Bay, south China

Xinghua Bay is one of the largest wintering sites of the black-faced spoonbill Platalea minor in mainland China. The ecosystem of Xinghua Bay has shown a deteriorating trend with the increasing pressure of economic development in recent decades. To understand the current conservation status of the wintering spoonbills in Xinghua Bay, we collected water samples along the coast of Xinghua Bay and important spoonbill habitats during the wintering period to analyze the pollution degree of 7 target heavy metals and organics. The Nemerow pollution index (NPI), heavy metal pollution index (HPI) and contamination degree (CD) were used to assess the heavy metal pollution levels. The ecological risk index of a target heavy metal (Efi) and potential ecological risk index of all target heavy metals (RI) were used to assess the ecological risk of heavy metals levels in Xinghua Bay. Positive matrix factorization (PMF) was used to determine the sources of heavy metals in coastal waters with the EPA PMF5.0 model. The results showed that there was moderate to very heavy pollution by heavy metals and moderate associated ecological risks in Xinghua Bay, in which Hg and Cd were the major heavy metal pollution sources, and the level of organic pollution was of serious concern. The use of fertilizers for cultured shellfish and aquaculture in and around the bay were the major cause of the excessive nitrogen and phosphorus levels, and factories surrounding Xinghua Bay were the major sources of heavy metals and organic pollution. We propose conservation measures to increase black-faced spoonbill population and enhance its habitats.

Assessing shorebird mortalities due to razor clam aquaculture at key migratory stopover sites in southeastern China.

Aquaculture can provide foraging habitat for birds, but it can also result in intentional and accidental mortality. We examined an overlooked conflict between razor clam (Sinonovacula spp.) aquaculture and declining shorebirds in southeastern China's Fujian and Zhejiang provinces. We surveyed 6 out of 11 internationally important stopover sites for these shorebirds and monitored shorebird mortality in 2 sites (Xinghua Bay, Yueqing Bay) with razor clam aquaculture. We visited an additional 32 sites in these 2 provinces to determine if there was netting in other razor clam farms. Approximately 8-9km2 of intertidal foraging habitat was covered by horizontal nets to prevent birds from feeding on young razor clams at Xinghua Bay and Yueqing Bay. We conservatively estimated that 13,676 (2.5th-97.5th percentile 8,330-21,285) individual shorebirds were entangled in the nets at the 2 monitored sites in April and May 2021, including 2 endangered and 7 near-threatened species. Mortality of 5 species for which we had sufficient data accounted for 0.76% (black-tailed godwit [Limosa limosa]) to 4.27% (terek sandpiper [Xenus cinereus]) of their total flyway populations. This level of mortality could strongly affect their populations. We found netting at 17 additional razor clam farms, indicating a widespread threat to shorebirds. Although razor clams are typically harvested in late March to early April, nets are left on the mudflats throughout the spring and summer, including when the bulk of shorebird migration takes place. Immediately removing these nets after the clam harvest could prevent most of the spring mortality of shorebirds, although this is unlikely to happen without government regulations or economic incentives. To better assess and mitigate the impacts of this conflict, future research should quantify shorebird mortality at other razor clam farms, including during winter, explore less harmful deterrence methods, and assess the socioeconomic factors driving the conflict.

Biofouling characteristics in Xinghua Bay of Fujian, China

Biofouling is one of the main factors affecting the efficiency and safety of cooling water systems in coastal nuclear power plants. Understanding the population dynamics, succession rules and cumulative effects of major fouling organisms is the basis for targeted prevention and control. A 1-year simulated concrete panel test was conducted from December 2020 to November 2021 in Xinghua Bay, China. A total of 78 species of fouling organisms were recorded by combining the monthly, seasonal, semiannual, annual and monthly cumulative panels, and the community composition was dominated by nearshore warm-water species, making for a typical subtropical inner bay-type community. The fouling organisms had a peak attachment period from June to October. Significantly more attachment was observed during summer (from June to August) than during the other three seasons. The attachment amount in the second half-year (from June to November) was much higher than that in the first half-year (from December to May). The attachment thickness, density, and biomass of the bottom summer panels reached 20 cm, 105,150 ind./m2, and 19,274.50 g/m2, respectively, while those of the bottom annual panels were 40 cm, 27,300 ind./m2, and 17,762.50 g/m2, respectively. The dominant fouling organisms with calcified shells mainly included Amphibalanus reticulatus and Pernaviridis. These species had high attachment amounts,could accumulate attachments for a long time, and even might cause secondary blockage, making them the most detrimental to the safety of a cooling system. Moreover,the seasonal upward growth of hydroids and bryozoans can also significantly reduce the efficiency of cooling water intake. We suggest that targeted prevention and control should be carried out according to the larval attachment period of different dominant groups of fouling organisms during June-October, which can greatly improve the prevention and control efficiency. Strengthening the research on the biological cycle phenomenon of the main species and their main environmental impact factors, and establishing a scientific and effective early-warning model are the governance direction of formulating and implementing scientific pollution prevention and control in the future.

Full-scale field test study of bearing characteristics of post-grouting pile for offshore wind turbines

Full-scale load tests were conducted on a combined steel pipe and bored pile foundation used for offshore wind turbine in Fuqing Xinghua Bay. Due to the complex geological conditions of the project, lengthening the bored pile will cause it to exceed the steel pipe pile so much that there are construction risks such as collapsed holes, hence, combined tip-and-side post-grouting was used to improve the bearing characteristics of the pile foundations. The results of double-level O-cell bi-direction tests before and after grouting on test pile SZ32 are reported. Comparing the test results before and after grouting shows that post grouting can significantly enhance the bearing capacity of the pile foundations. Furthermore, the relative displacement required to mobilize the shaft resistance of the test pile is significantly reduced by the post grouting craftwork. Additionally, the core samples obtained from the coring tests showed that the cement grout was distributed from 0.5 D below the pile tip to 5.3 D above the pile tip, respectively. Finally, the results could be applied to similar foundation design used in offshore wind turbine.

Marine spatial planning for transboundary issues in bays of Fujian, China: A hierarchical system

Transboundary issue is one of the main concerns of marine spatial planning (MSP) studies around the world, including China. With few studies on the effective approaches to address the transboundary issues in MSP reported, this study aims to assess the coordination effectiveness of transboundary bays at both municipal level MSP and provincial level MSP, using Xiamen Bay, Meizhou Bay, and Xinghua Bay in Fujian province as the study areas. To conduct this study, a method of sea use intensity and conflict was applied and developed to evaluate the coordination effectiveness of MSP at the municipal and provincial levels. A scoring method was applied to obtain each sea use intensity value (based on marine resources and impacts on marine environment) and the sea use pair conflict value (based on the influence or interference of two adjacent sea use types). Afterward, the outcome of this work was calculated and visualized using GIS tools. The results revealed that both the sea use intensity and conflict at municipal were higher than that of the provincial level MSP, which clearly indicates the existence of conflict between hierarchical MSP, furthermore, this study also revealed the necessity for transboundary coordination analysis since the highest sea use conflict was observed at the cross-boundary area of the provincial level MSP and in the city interior area of the municipal level. Based on the overall study, it was observed that the sea use conflict value had a negative relationship with sea use intensity value, most of which were showcased in Xiamen Bay having the lowest sea use intensity but the highest sea use conflict at both hierarchical levels MSP (SUIV, 3.87 and 4.61. SUCV, 8.60 and 9.38 at the municipal and provincial level MSP respectively), this is believed to be impacted by the increased marine industrial structure and a lack of spatial coordination. The results of this study will help the government to improve the MSP coordination in transboundary bays at the hierarchical systems, and inform potential future revisions of the coastal zone utilization at local, regional, and national scales.

Diet composition based on stable isotopic analysis of fecal samples reveals the preference of Black-faced Spoonbill (Platalea minor) for natural wetlands and fishponds

The Black-faced Spoonbill (<em>Platalea minor</em>; BFS) is a globally endangered species that is distributed only in the coastal zones of East Asia. Xinghua Bay is one of the main wintering sites and migration stopovers of BFS in mainland China. However, with the reduction and degradation of natural wetlands, it is uncertain whether artificial wetlands can provide habitat for the endangered BFS. Research on the diet of BFS will help to understand their preferences between natural and artificial wetlands and provide a reference for their conservation and habitat restoration. From December 2017 to February 2020, 45 potential food samples and 199 fecal samples of BFS were collected during six sampling periods, of which Cyprinidae, Mugilidae, Portunidae, Gobiidae and Palaemonidae were collected from natural wetlands and Crucian (<em>Carassius auratus</em>) and whiteleg shrimp (<em>Litopenaeus vannamei</em>) were collected from fishponds. Their stable isotope values (e.g., δ¹³C and δ¹⁵N) were measured to obtain the food composition information for BFS. In early winter, the proportion of Palaemonidae in BFS food was as high as 74.4%, while those of other foods were only 3.0% to 6.0%. In late winter, the food contributions for BFS were as follows: Portunidae 39.3% > Palaemonidae 26.1% > Cyprinidae 8.8% > Mugilidae 8.5% > Gobiidae 7.3% > Crucian 5.1% > whiteleg shrimp 4.8%. The proportion of Portunidae exceeded that of Palaemonidae, and together with Palaemonidae, it became the main food of BFS in late winter. The diet compositions of BFS between early and late winter were significantly different, which may be due to seasonal changes in food resources. Natural wetlands are the main feeding grounds of BFS, but fishponds also provide them with supplementary feeding grounds and resting places. Fishponds play an important ecological function in maintaining the overwintering population of BFS in Xinghua Bay.

Predicting potential mangrove distributions at the global northern distribution margin using an ecological niche model: Determining conservation and reforestation involvement

Mangroves play an important role in maintaining coastal wetland ecosystem functions, but they are highly threatened by anthropogenic activities. Predicting the potential distributions of mangroves is vital for policy makers and stakeholders to enforce conservation and reforestation measures. China is at the global northern margin of mangrove distribution. In this study, we used the maximum entropy (MaxEnt) model to predict potentially suitable habitats for mangroves based on current data of mangrove distributions in mainland China. For modeling, we grouped the native and exotic mangrove species in China into five groups and used 30 bioclimate, topographic, substrate, and sea surface temperature variables to predict mangrove distributions. The results show that bioclimate and sea surface temperature are both important factors that determine mangrove distribution. The largest suitable area modeled for mangrove species in the coastal zone was 2705 km2. About 14.8% of the predicted suitable habitat for the five mangrove groups is under protection in mangrove nature reserves. Along China’s coastline, 15 sites were identified as hotspots for mangrove conservation and reforestation. By comparing these results with current conservation efforts, we identified that protection priority should be given to the Beilun River Estuary to Fangcheng Harbor coastal zone in Guangxi Province, the east coast of the Leizhou Peninsula in Guangdong Province, and the Meizhou Bay to Xinghua Bay area in Fujian Province. In addition, suitable species selection should also be considered to achieve successful mangrove reforestation.

Composition and distribution characteristics of macroinvertebrates in subtidal zone of the main marine bays in Fujian Province, China

With data for distributions and diversities of macroinvertebrates from 12 main subtidal zones in the bays of Fujian on August 2010, we investigated species composition, biodiversity and community structure, as well as their relationships with environmental factors. The results showed that 382 macroinvertebrates were recorded, which included 170 annelids, 75 crustaceans, 78 mollusks, 19 echinodermata, and 40 other species. The species richness, individual abundance, biomass and biodiversity indices showed significantly spatial variability. The average of species richness was (55±21), with the highest (92) in Luoyuan Bay and the lowest species (25) in Jiuzhen Bay. Polychaetes was dominant species in each bay, with an average percentage of (51.8±5.5)%. Zhaoan Bay had the highest average individual abundance with (1330±1094) ind·m-2, followed by Fuqing Bay, Xiamen Bay and Meizhou Bay, while Quanzhou bay had the lowest. Xinghua Bay had the highest average biomass with (821.2±2387.7) g·m-2, followed by Fuqing Bay and Xiamen Bay. Both richness index and Shannon diversity were much higher in Luoyuan Bay, Meizhou Bay, Shenhu Bay, Xiamen Bay and Dongshan Bay, and their values were low in Fuqing Bay and Jiuzhen Bay. The mean value for d and H across all bays was (0.80±0.09) and (2.73±0.64), respectively. The macroinvertebrates of the study area were divided into 14 groups using a criterion of 20% similarity. The stations in Luoyuan Bay had the highest similarity and the lowest spatial variability, and followed by Sansha Bay, Fuqing Bay, Shenhu Bay and Zhaoan Bay. The higher variability of community composition was found among the stations for the rest bays. On the basis of Spearman correlations among species richness, biodiversity indices and environmental factors, as well as PCA analy-sis, Cu in the sediment, water depth, and dissolved inorganic phosphorus in bottom water were the main factors driving the spatial variability of composition and distribution of macroinvertebrates in the study area.

Nutrient Distribution of Overlying Water in Tidal Marshes in Five Estuaries and Bays of the Fuzhou Region in Autumn

Overlying water from the tidal marshes in five estuaries and bays, namely, Xinghua Bay (Fuzhou Part), Fuqing Bay, Luoyuan Bay, Minjiang River Estuary, and Aojiang River Estuary of the Fuzhou region were collected in autumn of 2015, and the nitrogen and phosphorus nutrient concentration and other physical and chemical indicators of the overlying water were measured to discuss the reasons for the differences in the nutrient concentration of the overlying water in tidal marsh wetlands in different bays and estuaries. There were significant differences in the nitrogen and phosphorus nutrient concentrations of the overlying waters of the tidal marshes in the different bays and estuaries (P<0.05). The concentrations of nitrogen and phosphorus in Fuqing Bay were relatively high, while Xinghua Bay had the lowest nitrogen nutrient concentration and Aojiang River Estuary had the lowest phosphorus nutrient concentration. The nutrient concentration of the overlying water in Fuqing Bay is mainly affected by regional aquaculture, land-source pollution, and topography, while that in Xinghua Bay is mainly affected by tides. The vegetation type had an effect on the nutrient concentration of the overlying water in the wetlands. The concentration of nitrogenous nutrients in the overlying water of the marsh wetland in the Suaeda australis community was relatively high, while the nitrogen and phosphorus nutrient concentrations in the overlying water of the Spartina alterniflora community wetland was relatively low; the concentrations of nutrients in the overlying water of different plant communities in the same bay or estuary marsh wetland were different, and the relationships were complex. Tides, surface runoff, plant communities, topography, and human activities all had an important impact on the nutrient concentrations in the overlying waters of the bay and estuary wetlands.

The impact of large-scale reclamation on hydro-dynamic environment–A case study of Xinghua Bay

A hydro-dynamic model is established on basis of MIKE21FM to simulate the hydro-dynamic characteristics of Xinghua Bay and investigate the influence of reclamation project on the tidal elevation and tidal currents. Tidal elevation data was obtained at the six tide gauge stations around the Xinghua Bay, and another six current stations were established to observe the tidal current velocity and direction. Validation shows that the model-simulated tidal elevation and tidal currents agree well with observations made at different stations. Predictions are made according to the reclamation project proposed in the regional marine planning of Hanjiang Industrial Park around the port in Putian City. The variations of hydro-dynamic factors, such as tide, current velocity and direction and tidal influx are obtained, and the adverse effect of reclamation on marine environment is discussed. It is shown that the tidal level inside the Xinghua Bay during high tide decreases after the reclamation project is completed. The tidal currents during flooding tide generally decrease in the southeast of the reclamation region, with the maximum decreasing amplitude reaching 0.44 m s−1. On the other hand, the tidal currents during flooding tide increase around the southeast and southwest corners of the reclamation region. The tidal currents during ebb tide increase around the southeast and southwest corners of the reclamation region, with the maximum increasing amplitude attaining 0.18 m s−1. The results in this paper can give some guidance for the marine environment management and the effective utilization of land in Putian.

Residues and enantiomeric profiling of organochlorine pesticides in sediments from Xinghua Bay, southern East China Sea

The spatial distribution and chiral signatures of organochlorine pesticides (OCPs) in the surface sediments of Xinghua Bay, southern East China Sea, were investigated. The total OCP concentrations ranged from 9.15 to 40.5 ng/g dry weight, with a predominance of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs). The isomer ratios of α-HCH/γ-HCH (less than 1.0) and the predominant β-HCH implied that HCH residues were derived not only from historical technical HCH use but also from the additional use of lindane in this area. The isomer ratios of p,p′-DDT/(p,p′-DDD + p,p′-DDE) and o,p′-DDT/p,p′′-DDT, and a strong correlation (R = 0.83, P < 0.001) between p,p′-DDE and o,p′-DDT depicted a cocktail input pattern of dicofol-type DDT and technical DDT. Moreover, the fact that only cis-chlordane was detectable for all sampling stations suggested the past application of technical chlordane. Based on the sediment quality guidelines (SQG), γ-HCH is the main OCP species of ecotoxicological concern in Xinghua Bay. Enantiomeric analysis showed that the (+)-enantiomers of α-HCH and o,p′-DDT were more prevalent than the (−)-enantiomers in most samples, whereas both racemic and nonracemic residues existed for o,p′-DDD. These results implied that the SQG of chiral OCPs should be reassessed using concentrations of their individual enantiomers.

Spatial and temporal distribution on fish diversity in the Xinghua Bay

Based on the data from 3 oceanographic censuses in the Xinghua Bay in January 2009,April and September 2008,the author discussed the spatial-temporal distribution of number of fish species and diversity involved in some impact factors such as background of topography and hydrological features.Results showed that 123 species were identified among which 47 species occurred in January,48 species in April and 81 species in September.The number of Perciformes species occupied 41.46% of total number.The H' in weight in January,April and September separately were 2.59,1.78 and 2.65,while H' in individual number were 2.84,2.42 and 2.42 among which seasonal weight H' values were similar as seasonal species number while individual H' was highest in winter.The individual H' was closely related to species number (r=0.69,P=0.014 5,n=47) in January,while related to species density in April(r=0.62,P=0.023 8,n=48).In September,the H' was not related with both species number and density.The species number in January,individual density in April were both key factors affecting on individual H'.The seasonal species alternations were 79.75% from January to April,82.41% from April to September,and 77.88% from September to January.The pattern of richness and diversity (H') were decided by diverse marine topography and runoff in west part of the bay,mixture of tidal waters in the middle bay as well as fish migration in the out bay.

春夏季闽江口和兴化湾虾类数量特征

Based on the data from four oceanographic censuses in the Minjiang estuary and Xinghua bay during April and September 2008,this paper compared the spatial-temporal distribution of shrimp density between the two kinds of waters, involved in some impact factors such as dominant species,background of topography and geomorphy,as well as hydrological features. Results showed that total weight density( 22. 05kg / km2) at the Minjiang estuary was lower than that( 23. 33kg / km2) at the Xinghua bay,while total individual density( 12. 34×103ind. / km2) at the Minjiang estuary was higher than that 8. 42×103ind. / km2) at the Xinghua bay during April. Same as in April,the total weight density( 205. 54kg/ km2) at the Minjiang estuary was lower than that( 329. 60kg/km2) at the Xinghua bay,while total individual density( 131.25×103ind. / km2) at the Minjiang estuary was higher than that 95. 79 ×103ind. / km2) at the Xinghua bay in September. The phenomenon was related with the individual size of shrimp species from the two different waters. In the Xinghua bay,the most dominant species was a euryhaline large size species,Parapenaeopsis hardwickii,with high dominance and great contribution to total weight density,while other dominant species with low dominance and small contribution. But in the Minjiang estuary,brackish species,a very small size shrimp,Acetes chinensis were the important dominant species with the most percent in individual densities and the greatest contribution to the total individual density. The different body size of dominant species between the two waters formed because of large size Parapenaeopsis hardwickii as the main dominant species at the Xinghua bay while small size Acetes chinensis,adapted to low salinity,as the important dominant specie at the Minjiang estuary. At the Minjiang estuary,the most shrimp resource aggregated in the south area which was thought as the main fishing ground,and,September was thought as the main fishing season because both weight density and individual density in September were far higher than those in April at the Minjiang estuary. The seasonal runoff of the Minjiang River and topography of the estuary were main environmental reasons which produced the variation in the estuary. At the Xinghua bay,spawning and feeding ground of shrimps lay in waters near the mouth of the bay in September, and the wintering ground located in the deeper outside waters of the bay in winter,related with distribution of shrimp weight density. The main dominant species Parapenaeopsis hardwickii,a warm-water species occupied 89. 43% of total shrimp weight density determined the distribution pattern in April. The mixture of different water masses in waters near the mouth of the bay was another reason determined the distribution pattern. The shrimp dominant species in September showed a more diversify trend than that in April both in the Xinghua bay and the Minjiang estuary,while the dominant species at the Minjiang estuary is more diversify than that at the Xinghua bay compared with the two different kind of waters.

Organochlorine pesticides (OCPs) in soils of the coastal areas along Sanduao Bay and Xinghua Bay, southeast China

Concentrations of organochlorine pesticides (OCPs) have been measured in 21 surface soil samples (0–20cm) collected along Sanduao Bay and Xinghua Bay, southeast China. The total concentrations of OCPs in soil samples of Sanduao Bay and Xinghua Bay range from 1.85 to 54.73ng/g (dry weight) and 4.66–38.07ng/g (dry weight), respectively. The mean concentrations of soil samples two bays were in following order: DDTs>HCHs>endosulfans>chlordanes. HCHs in the study areas may have received fresh lindane input. DDTs in 85.7% soil along Sanduao Bay and Xinghua Bay indicating a use of technical DDT in these areas for a long time. But, DDTs in some soil samples along Xinghua Bay were likely due to the historical application of technical DDT. There were weak correlations between TOC contents and residues of HCHs, DDTs, chlordane and endosulfan, indicating that TOC of soil is not the only factor enhance adsorption of these compounds.

Comparison of fish fauna of two different waters (Minjiang Estuary and Xinghua Bay) of the East China Sea during spring and summer

Comparison of fish fauna of two different waters (Minjiang Estuary and Xinghua Bay) of the East China Sea during spring and summer

Organochlorine pesticides (OCPs) in soils and sediments, southeast China: A case study in Xinghua Bay

This study evaluated the contamination status and distribution of organochlorine pesticides (OCPs) between Xinghua Bay and adjacent watersheds in Putian region, southeast China. Twenty-five surface soil samples and two sediment cores were collected from two watersheds and the Xinghua Bay, respectively. Results showed that the concentrations of OCPs in samples of the Mulan River Watershed (MRW), the Qiulu River Watershed (QRW), the inner bay core (IBC) and the open bay core (OBC) were in the range of 4.96–38.20ng/g, 4.62–22.80ng/g, 1.84–80.46ng/g and 1.87–23.43ng/g, respectively. The mean concentration of OCPs was in an order: IBC>MRW>QRW>OBC. The higher concentration of OCPs in recent periods may suggest that a certain amount of OCPs were still input to this area.

Evaluation of Pollution Source of the Bays in Fujian Province

Abstract Based on investigation data of pollution sources of seven bays in Fujian province (Luoyuan Bay, Quanzhou Bay, Xiamen Bay, Sansha Bay, Xinghua Bay, Meizhou Bay and Dongshan Bay), the pollutant source composition, total amount and distribution character of pollution sources are evaluated in this article. The result shows that: Pollution Sources of the Bays in Fujian province are mainly land-based pollution. Agricultural pollution source makes up the largest percentage of the land-based pollution sources, followed by domestic pollution source and soil erosion while industrial pollution source makes up the smallest percentage. Sea-based pollution sources come mainly from aquaculture pollution while vessel-source makes up only a very small percentage. Among the seven bays, Meizhou Bay has the largest amount of COD discharged into sea and Dongshan Bay the smallest; Xinghua Bay has the largest amount of TN, TP and Luoyuan Bay the smallest. The concept of pollutant load per unit tidal prism is introduced to evaluate the pollution pressure of each bay. The research can be a scientific support of the total amount control of pollution discharged into bay and promote the socioeconomic sustainable development in Fujian coastal area.