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JournalISSN: 1672-5948

Wetland Science 

About: Wetland Science is an academic journal. The journal publishes majorly in the area(s): Wetland & Phragmites. It has an ISSN identifier of 1672-5948. Over the lifetime, 420 publications have been published receiving 1393 citations.
Topics: Wetland, Phragmites, Sanjiang Plain, Marsh, Vegetation


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Journal Article
TL;DR: Wang et al. as mentioned in this paper systematically summarized the change characteristic of mangroves and their species composition, and demonstrated the macroscopically control effect of air temperature for the geographical distribution of Mangrove plants.
Abstract: This paper systematically summarized the change characteristic of mangroves and their species composition. The geographical distribution of mangrove plants and their growth status are greatly affected by many external factors, including air temperature, ocean currents, waves, bank slopes, salinity, tides, and sediment and so on. Mangroves in China are mainly distributed in the southeast coast of the tropical and subtropical coastal bays,estuaries and other areas under waters. From Hainan Island towards the north, climate zones extend from central tropical zone(the south of Hainan Island), to northern tropical zone(the north of Hainan Island, south of Leizhou Peninsula and Taiwan Island), to southern subtropical zone(Guangxi province, Guangdong province, Fujian province, the south of Taiwan Island and southern coastal areas of Fujian province), to northern subtropical zone(the north of Fujian province and coastal areas of Zhejiang province). The area and population diversity of mangrove plants decline significantly with increasing latitudes, and forest stand also transforms from arbor to shrub, which fully demonstrated the macroscopically control effect of air temperature for the geographical distribution of mangrove plants. In terms of mangrove cover change, the total area of mangroves in China has been dramatically shrunk from 250 thousand ha in history, to 42 thousand ha in 1950, and to 22.8 thousand ha in2001. In 2001, descending order of existing area of mangroves in China's major provinces is: Guangdong province(9 084.0 ha), Guangxi province(8 374.9 ha), Hainan(3 930.3 ha), Fujian province(615.1 ha), Hong Kong Special Administrative Region(510 ha), Taiwan province(278 ha), Zhejiang province(19.9 ha), Macau Special Administrative Region(60 ha). For the species composition of mangrove plants, adding 2 species(Sonneratia apetala and Laguncularia racemosa) of successful introduced true-mangrove plants from abroad, now there is total 38 species of mangrove plants in China, including 26 species of true-mangrove plants and 12semi-mangrove plants.

45 citations

Journal Article
TL;DR: In this article, Wang et al. used GIS and the landscape pattern analysis software,FRAGSTATS, to analyze the changes of landscape pattern and their dynamic changes of wetlands in the estuary of the Minjiang River in Fujian province.
Abstract: The Mingjiang River is a large river that rises from the east of the Wuyi Mountains of Jianning county in Fujian province of the southwest China. The climate type of study region is subtropical maritime monsoon climate, characterized by warm and humid days and distinct seasons. The average annual wind speed is 3.4 m/s. The annual precipitation is abundant and annual amount of precipitation is 1 346 mm. The average annual temperature is 19.6 ℃. In general, the monthly average of temperature in July is the highest during a year, and the lowest occurred in January.The Minjiang River has a great flow and low silt content, being a typical mountain river. Affluents of the Minjiang River are densely distributed, among which are the Anrenxi River, the Meixi River, the Daidangxi River, the Daimuxi River and the Yingquanxi River. The soils in the estuary region of the Minjiang River are mainly paddy soils and laterites. There are two kinds of natural vegetations in the drainage area; they are tropical rain forest of South Asia and tropical forest of central Asia. Due to the diversity of natural conditions, vegetation types are complicated, including green foliage forest, bamboo grove, brush, thick patch of grass, Shashenglin of coast and so on. Because of the interaction between the rivers and sea, there is a great diversity of the wetland landscapes. There is the richest wetland resources in the estuary region of the Minjiang River of Fujian province, but at the same time, the environment of wetlands is very vulnerable due to disturbances of human activities as a result of the influence of social and economic development in recent years. The area of the wetlands is reduced, the function of wetlands degenerates, and the environment was endangered as a whole. Quantitative analyses to all kinds of landscape pattern and their dynamic changes of wetlands were made in the estuary of the Minjiang River, in which Remote Sensing and Geographical Information System were applied and Landsat TM images were used in 1986 and 2002. The indexes reflecting the spatial structure and the heterogeneity of landscape pattern were selected based on the ecology principle of the landscape pattern. All the analyses were performed using GIS and the landscape pattern analysis software,FRAGSTATS.Selected landscape indexes were class area (CA), percent of landscape (PLAND), patch richness (PR), Shannon~ , s diversity index(SHDI), Shannon~ , s evenness index(SHEI), mean patch fractal dimension(MPFD) , number of patches (NP),the mean patch size(MPS), patch size coefficient of variation (PSCV), patch density(PD), patch cohesion index(PCI) and contagion index(CONT). The results showed that (1) the overall landscape area reduced by 10 007.19 hm~ 2 ; NP value was reduced by 34 from 1986 to 2002; the SHDI value increased from 1.129 8 in 1986 to 1.184 3 in 2002; and the SHEI value increased from 0.580 6 to 0.608 6 too. To some extent, rivers and paddy fields performed the function of controlling landscape pattern better, the others performed worse relatively. And the eigenvalue of indexes was also changed. For example, PD value increased from 0.465 3 in 1986 to 0.493 0 in 2002 per 100 hm~ 2 , MPFD value was 1.083 0 and PSCV value was 546.161 0 in 1986, they increased to 1.090 0 and 586.404 9 respectively in 2002, in contrast, CONT value decreased form 68.894 9% to 67.745 5%.In conclusion ,due to the disturbance of human activities, the degree of patch fragmentation further increased ,the difference between the patch size was enlarged, the separate degree increased, the connectivity was weakened, the irregularity of patch shape and the bigger isolation between patches as a whole.(2) The indexes of all kinds of landscape pattern with the more complicated structure have been changed too. By analysis of selected indexes, it was found that there were obvious different changes on various landscape patterns over 16 years. The area of wetland landscape has reduced in some degree besides the breeding farm. In respect of land use and land cover, the most dominant landscapes were paddy fields and rivers, and their influences have been lessened slightly. The total area of paddy fields and rivers was 47 232.94 hm~ 2 in 1986, but, it dropped to 38 407.33 hm~ 2 in~ 2002,with its proportion dropped from 77.52% to 64.25%. As the patch fractal dimension analysis implicated, the patch density of the reservoir, the breeding farm, and the paddy field increased, the degree of patch fractal dimension was further strengthened, and other wetland landscape types were opposite. The results of analysis of patch shape indexes showed that the fractal dimension of reservoir and mud sand reduced and the patch shape turned into simple and regular. The patch cohesion index of the reservoir, the sand beach and the paddy field were decreasing. The patch separate degree of those three landscapes increased, the connectivity was weakened, but the connectivity of other landscapes was strengthened actually. It is obvious that the phenomenon of mutual transformation and reverse among landscape patterns was due to the interference of human activities and natural reasons. The spatial variation of the riparian landscape along the river was affected by a suite of natural and anthropogenic factors, such as temperature,precipitation,soil,and various human activities.Human population density was one of the most important factors.Rapid population growth and economic development have significantly influenced the spatial pattern of the landscape of rivers and the paddy fields.Quantifying the landscape pattern and its change should provide useful information for effectively monitoring,assessing,and managing these ecosystems.

40 citations

Journal Article
TL;DR: According to the first National Wetlands Inventory, there was rich wetland resources in China in and the total area of wetland was up to 3 848.55 km 2 as discussed by the authors.
Abstract: According to the first National Wetlands Inventory, there was rich wetland resources in China in and the total area of wetland was up to 3 848.55 km 2. There were 724 species of wetland vertebrate animal belonging to 75 families, 25 orders, and 2 276 species of wild advanced plant belonging to 815 genera, 225 families in wetlands. The wetland vegetation was divided into 7 groups of vegetation type including 16 vegetation types,180 formations。At present, the wetlands in China were subjected to some serious threats such as reclamation, environmental pollution and over-exploitation of natural resources. All the threats had resulted in the continuous degradation, even loss of wetlands in China. The requirement of local ecological balance was hard to maintain. Facing to the problems mentioned above, conservation strategy of wetland and the National Wetland Conservation Planning should be implemented, and the wetland legislation and establishment of institution of wetland conservation should be enhanced as soon as possible.

27 citations

Journal Article
TL;DR: In this paper, the distribution patterns of vegetation to the gradient of water depth and soil salinity in this deltaic wetland were analyzed in the field survey carried out in October 2006 in the popedom of Dawenliu Management Station, Yellow River Delta National Nature Reserve.
Abstract: Yellow River Delta,within the range of 37°35′N38°12′N and 118°33′E-119°20′E,located in the middle of East-Asian Continent,is one of the three main deltaic wetlands in ChinaIt is also an important habitat for the birds from East-Asia and from East-Asia to AustraliaA national reserve namely Yellow River Delta National Reserve has been established since 1991 in the delta to protect the newly-formed wetland ecosystem and rare/endangered waterfowlsThe main soil types in the reserve are tidal soil and saline soil Secular water covered wetland,including river,lake,estuary,pond,reservoir, aqueduct,saline,shrimp or crab pond and shoal,takes 6306% of the total area,while seasonal water covered wetland,embracing tideland,reed mire,other swamps,sparse wetland,shrub wetland,meadow and paddy landThe distribution patterns of vegetation to the gradient of water depth and soil salinity in this deltaic wetland were analyzed in the paperField survey was carried out in October,2006 in the popedom of Dawenliu Management Station,Yellow River Delta National Nature ReserveAnd it is one of typical wetland zones in this delta30 sampling sites all together in ten transects from the sea to inland were designed to investigate plant communitiesIn each sampling site,the composition of plant communities and coverage/abundance of every plant species were recordedSoil samples were collected from depths of 0-20 cm in every sampling site to mensurate soil salinity in laboratoryWater depths were measured by a ruler in situ2 multianalysis methods,two-way indicator species analysis(TWINSPAN) and fuzzy set ordination(FSO),were used in the studyAnd the results indicated that each of the 8 vegetation types given by TWINSPAN had its own region in the chart of fuzzy set ordinationThe communities with Myriophyllum spicatum which was hydrophyte as dominant species were located in the up left corner that represented a high water depth and a low soil salinity;the communities with Tamarix chinensis and Suaeda heteroptera which were both halophyte as their dominant species were always located in the down right corner where meant a low water depth but high soil salinity;other communities with Phragmites australis,Triarrhena sacchariflora and Salix matsudana which were xerophil but sensitive to the gradient of salinity were located in central area of the chartAs a further analysis,Gini-Simpson indexes were computed for all the sampling sites,and the distribution patterns of the within community diversity to the gradients of water depth and soil salinity were analyzedThe result indicated both the communities with a high water depth but low soil salinity and those with a low water depth but high soil salinity showed a low within community diversity,and the communities in the transitional zone showed a high diversity

26 citations

Journal Article
TL;DR: Wetlands are formed by the interaction between terrestrial system and aquatic system Wetlands are among the world s most productive environment They are cradles of biological diversity, providing the water and primary productivity upon which countless species of plants and animals depend for survival as mentioned in this paper.
Abstract: Wetlands are formed by the interaction between terrestrial system and aquatic system Wetlands are among the world s most productive environment They are cradles of biological diversity, providing the water and primary productivity upon which countless species of plants and animals depend for survival Wetlands have hydrological function, biogeochemical function and ecological function The interactions of physical、bio-logical and chemical components of wetland, such as soils, water, plants and animals, enable the wetland per-form many vital functions Wetland research is very important in the research of global environment change because wetlands act as a "sink" of carbon and climate "stabilizer" on global scale At present, the basal theory research of wetland system should be strengthened We should take great effort to further understand the definition, property and function of wetlands The developmental tendency of wetland science should be clear Natural historic processes of wetland formation, classification of wetland function, effects of global changes on wetlands, structure and function of wetland ecosystem, dynamics of wetland ecosystem, and so on, will be important in future study

22 citations

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No. of papers from the Journal in previous years
YearPapers
201511
201433
201340
201241
201138
201041