Attenuation of LandfillLeachate by a Natural Marsh System

A spatiotemporal analysis on the changes in the marsh landscape in the Honghe National Nature Reserve, a Ramsar reserve, and the surrounding farms in the core area of the Sanjiang Plain during the past 30 years was conducted by integrating field survey work with remote sensing techniques. The results indicated that intensified agricultural development had transformed a unique natural marsh landscape into an agricultural landscape during the past 30 years. Ninety percent of the natural marsh wetlands have been lost, and the areas of the other natural landscapes have decreased very rapidly. Most dry farmland had been replaced by paddy fields during the progressive change of the natural landscape to a farm landscape. Attempts of current Chinese institutions in preserving natural wetlands have achieved limited success. Few marsh wetlands have remained healthy, even after the establishment of the nature reserve. Their ecological qualities have been declining in response to the increasing threats to the remaining wetland habitats. Irrigation projects play a key role in such threats. Therefore, the sustainability of the natural wetland ecosystems is being threatened by increased regional agricultural development which reduced the number of wetland ecotypes and damaged the ecological quality.

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Sealing Effects of Natural Marsh Soils on Leakage from Dredged Material Depositions

Zeitschrift der Deutschen Geologischen Gesellschaft ◽

10.1127/zdgg/141/1990/427 ◽

1990 ◽

Vol 141 (2) ◽

pp. 427-434

Author(s):

Alexander Gröngröft ◽

Günter Miehlich

Keyword(s):

Dredged Material ◽

Natural Marsh

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AMS Radiocarbon Dating and Pollen Analysis of Core Ks0412-3 from Kashibaru Marsh in Northern Kyushu, Southwest Japan

Radiocarbon ◽

10.1017/s003382220004861x ◽

2013 ◽

Vol 55 (3) ◽

pp. 1693-1701 ◽

Cited By ~ 1

Author(s):

Toshiyuki Fujiki ◽

Mitsuru Okuno ◽

Toshio Nakamura ◽

Shinji Nagaoka ◽

Yuichi Mori ◽

...

Keyword(s):

Mass Spectrometry ◽

Pollen Analysis ◽

Radiocarbon Dating ◽

Sediment Accumulation ◽

Sand Layer ◽

Natural Marsh ◽

Southwest Japan ◽

Marsh Sediment ◽

Ams Radiocarbon Dating ◽

Average Sedimentation Rate

We performed pollen analysis and accelerator mass spectrometry (AMS) radiocarbon dating on cored sediments (KS0412-3) from Kashibaru Marsh, located in the western part of the Sefuri Mountains in northern Kyushu, southwestern Japan, to investigate environmental change around the marsh. Sediment accumulation began in this marsh around cal AD 1200 and continued with an estimated average sedimentation rate of about 4 mm/yr. Human rice cultivation at this location began around cal AD 1300 and was abandoned due to the deposition of a thick sand layer at around cal AD 1400. Since this event, the area has been maintained as a “natural” marsh.

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Nitrogen fixation and nitrogen limitation of primary production along a natural marsh chronosequence

Oecologia ◽

10.1007/s00442-003-1277-5 ◽

2003 ◽

Vol 136 (3) ◽

pp. 431-438 ◽

Cited By ~ 48

Author(s):

Anna Christina Tyler ◽

Tracie A. Mastronicola ◽

Karen J. McGlathery

Keyword(s):

Nitrogen Fixation ◽

Primary Production ◽

Nitrogen Limitation ◽

Natural Marsh

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Establishing Spartina alterniflora Marsh in North Carolina

Environmental Conservation ◽

10.1017/s0376892900018555 ◽

1976 ◽

Vol 3 (3) ◽

pp. 185-188 ◽

Cited By ~ 18

Author(s):

Ernest D. Seneca ◽

Stephen W. Broome ◽

William W. Woodhouse ◽

Leon M. Cammen ◽

Joseph T. Lyon

Keyword(s):

North Carolina ◽

Salt Marsh ◽

Spartina Alterniflora ◽

Biomass Accumulation ◽

Growing Season ◽

Natural Marsh ◽

The North ◽

Viable Seeds ◽

Time Required ◽

Sediment Carbon

Spartina alterniflora salt-marsh has been established from seed and transplants on dredged materials and sandy shorelines along the North Carolina coast. Transplants were more successful than seeding over a greater portion of the intertidal range and under more rigorous environmental conditions, but seeding was successful in the upper half of protected sites. Seeding at the rate of 100 viable seeds per square metre from April through May can result in complete vegetational coverage by the end of the first growing-season. At the end of the second growing-season, above-ground biomass accumulation from seeding approached that produced by transplants which had originally been planted on a 0.9-metre centre. Both above-ground and below-ground production of planted marsh compared well with values for these components in natural marshes. There were no differences in production by epiphytes between planted and natural S. alterniflora marsh at two different locations. Faunal production in the upper 13 cm of sediment was significantly less in planted than in natural marsh, and where marsh plants accumulated sediments, faunal numbers and biomass were less in planted than in unplanted areas. Sediment carbon content indicated that 4 to 25 years might be required for a newly-planted marsh to resemble a natural marsh.Based on our studies, the techniques developed to plant S. alterniflora on dredged material and along sandy shorelines can be employed to initiate new and functional salt-marsh where none existed previously. The length of time required for man-initiated marsh to resemble natural marsh depends upon how closely the new substrate resembles natural marsh in the type of sediment accumulated, in the elevation of the new substrate, in the natural sedimentation rate in the area, and in the relative maturity of the natural marsh system.

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The manicured wetland that sucks up more carbon than a natural marsh

Nature ◽

10.1038/d41586-020-00098-1 ◽

2020 ◽

Vol 577 (7791) ◽

pp. 452-452

Keyword(s):

Natural Marsh

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Effects of Flooding on Dissolved and Suspended Nutrients in Small Diked Marshes

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f86-245 ◽

1986 ◽

Vol 43 (10) ◽

pp. 1999-2008 ◽

Cited By ~ 22

Author(s):

John A. Kadlec

Keyword(s):

Surface Water ◽

Indirect Effect ◽

Interstitial Water ◽

Major Ions ◽

Wave Action ◽

Nutrient Concentrations ◽

Natural Marsh ◽

Time And Space ◽

Emergent Macrophytes ◽

Delta Marsh

Flooding ten 5- to 7-ha diked marshes in the Delta Marsh, Manitoba, to about 1 m above natural marsh levels did not increase dissolved or suspended nutrient concentrations in the surface water. Dissolved forms of N and P increased in interstitial water, possibly as a direct or indirect effect of death of emergent macrophytes (e.g. cattail, Typha spp.) and associated changes such as wave action and detritus deposition. Concentrations of suspended N, P and C decreased in surface water as a result of flooding, both in absolute terms and relative to concurrent increases shown by natural marsh controls. Concentrations of major ions (Ca2+, Mg2+, Na+, K+[Formula: see text] and Cl−) did not change in response to flooding, but did vary in time and space. A predicted decrease in the concentrations of major ions in interstitial water due to seepage of dilute surface water into the sediment was not detected.

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