The Silicon Cycle: Human Perturbations and Impacts on Aquatic SystemsVenugopalan Ittekkot, Daniela Unger, Christoph Humborg, Nguyen Tac An Silicon is among the most abundant elements on earth. It plays a key but largely unappreciated role in many biogeochemical processes, including those that regulate climate and undergird marine food webs. The Silicon Cycle is the first book in more than 20 years to present a comprehensive overview of the silicon cycle and issues associated with it. The book summarizes the major outcomes of the project Land-Ocean Interactions: Silica Cycle, initiated by the Scientific Community on Problems of the Environment (SCOPE) of the International Council of Scientific Unions (ICSU). It tracks the pathway of silicon from land to sea and discusses its biotic and abiotic modifications in transit as well as its cycling in the coastal seas. Natural geological processes in combination with atmospheric and hydrological processes are discussed, as well as human perturbations of the natural controls of the silicon cycle. |
Contents
1 | |
3 | |
13 | |
Factors Controlling Dissolved Silica in Tropical Rivers | 29 |
Dissolved Silica Dynamics in Boreal and Arctic Rivers Vegetation Control over Temperature? | 53 |
Dissolved Silica in the Changjiang Yangtze River and Adjacent Coastal Waters of the East China Sea | 71 |
Atmospheric Transport of Silicon | 81 |
Estuarine Silicon Dynamics | 93 |
Role of Diatoms in Silicon Cycling and Coastal Marine Food Webs | 163 |
Responses of Coastal Ecosystems to Anthropogenic Perturbations of Silicon Cycling | 197 |
Silicon IsotopeBased Reconstructions of the Silicon Cycle | 215 |
LongTerm Oceanic Silicon Cycle and teh Role of Opal Sediment | 229 |
The Perturbed Silicon Cycle | 245 |
Contributors | 253 |
SCOPE Series List | 259 |
265 | |
Physiological Ecology of Diatoms Along the River Sea Continuum | 121 |
Modeling Silicon Transfer Processes in River Catchments | 139 |
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Common terms and phrases
activities atmospheric average basin benthic biogenic biogeochemical biological blooms Brzezinski carbon catchment changes Chapter chemical climate coastal coastal waters composition Conley continental cycle dams decrease deposition diatoms discharge dissolution dissolved DSi concentrations dust ecosystems edited effect environment Environmental estimated estuary et al eutrophication factors Figure fluxes forest freshwater function global growth higher human impact important increase influence inputs isotopes Journal land limitation load lower major marine Marine Ecology matter measured minerals mixing Nature North nutrient observed occur ocean opal organic particles percent phytoliths phytoplankton plants processes production Progress range rates ratio recent regions removal Research result rivers rocks role salinity scale Science SCOPE seasonal sediment Series shelf silica silicon soil species studies surface Table transport tropical rivers uptake values variability vegetation watersheds weathering yield zone