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Sediment-nutrient dynamics in selected Indian mangrove ecosystems - land use and climate change implications


The eastern coast of India harbours a number of mangrove forests, which are now under stress due to climate change-induced sea level rise; sea level is steadily increasing at a rate of 9-12 cm year~(-1). Current projections for sea level rise are about 0.4-0.9 m; this will have a devastating effect on Indian mangroves. There is significant variability in local C, N and P chemistry, and the accumulation and export of these nutrients are due to changes in land use patterns and rising sea level. Seasonal variations control sediment-associated trace metals, organic C, total N, and total P, and reflect spatial and temporal differences in sedimentary organic production. Population dynamics of polysaline species have changed drastically due to varying inputs of autochthonous sediments from land and salt water inundation/intrusion, mainly at the seaward ends of the mangrove forests. The nutrient-rich sediments create a breeding and fishing ground for various ecologically and economically important species. In these mangroves, sediment-associated trace element concentrations are also increasing as a result of anthropogenic inputs, and influence the biogeochemistry of the ecosystems. An effort has also been made to assess the trace metal concentrations in the three east coast mangroves of India (Sundarbans, Bhitarkanika and Pichavaram) to define the drivers for variations in metal distribution.......

【作者名称】: AL. RAMANATHAN, RAJESH KUMAR RANJAN, M. BALA KRISHNA PRASAD, RITA CHAUHAN, GURMEET SINGH
【作者单位】: School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India, School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India, Earth System Science Interdisciplinary Centre, University of Maryland, College Park, Maryland 20740, USA, School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India, School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
【关 键 词】: mangrove, metals, nutrients, climate change
【会议名称】: Sediment dynamics for a changing future
【期刊论文数据库】: [DBS_Articles_01]
【期刊论文编号】: 101,629,217
【摘要长度】: 1,407
【会议地点】: Warsaw(PL)
【会议组织】: School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India;School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India;Earth System Science Interdisciplinary Centre, University of Maryland, College Park, Maryland 20740, USA;School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India;School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India;
【会议时间】: 2010
【上篇论文】: 外文会议 - An Examination of the Application of Acoustic Doppler Current Profiler Measurements in a Wide Channel of Uniform Depth for Turbulence Calculations
【下篇论文】: 外文会议 - Technology and repairs in Castelli e ponti di mastro Nicola Zabaglia (Rome, 1743)

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