[2] MOUGIN E, RAMBAL S, SEEN D L et al. A regional Sahelian grassland model to be coupled with multispectral satellite data: I. Model description and validation[D]. Remote Sensing of Environment, 52, 181-193(1995).

[3] III F S C, MATSON P A, MOONEY H A. Principles of Terrestrial Ecosystem Ecology[D]. New York: Springer, 369-397(2002).

[7] BAI J H, GAO Z Q, LU Q Q et al. Spatial and seasonal distribution and risk assessments for metals in a Tamarix Chinensis Wetland, China[D]. Wetlands, 36, 125-136(2016).

[8] CHEN C T A, GAO X L. Heavy metal pollution status in surface sediments of the coastal Bohai Bay[D]. Water Research, 46, 1901-1911(2012).

[9] JACOBS S, OOSTERLEE L, TEUCHIES J et al. Role of plants in metal cycling in a tidal wetland: Implications for phytoremidiation[D]. Science of the Total Environment, 445-446, 146-154(2013).

[10] BURKE D J, HAMERLYNCK E P, SUNTORNVONGSAGUL K et al. Fate and effects of heavy metals in salt marsh sediments[D]. Environmental Pollution, 149, 79-91(2007).

[12] BAI J H, XIAO R, ZHANG K J et al. Arsenic and heavy metal pollution in wetland soils from tidal freshwater and salt marshes before and after the flow-sediment regulation regime in the Yellow River Delta, China[D]. Journal of Hydrology, 450-451, 244-253(2012).

[15] BAI J H, CUI B S, XIAO R et al. Assessment of heavy metal pollution in wetland soils from the young and old reclaimed regions in the Pearl River Estuary[D]. South China. Environmental Pollution, 159, 817-824(2011).

[17] OLSON J S. Energy storage and the balance of producers and decomposers in ecological systems[D]. Ecology, 44, 322-331(1963).

[18] MOU X J, SUN W L, SUN Z G. Decomposition and heavy metal variations of the typical halophyte litters in coastal marshes of the Yellow River Estuary, China[D]. Chemosphere, 147, 163-172(2016).

[19] BERG B, MCCLAUGHERTY C. Plant Litter, Decomposition. Humus Formation, Carbon Sequestration[D]. New York: Springer, 102-110(2003).

[20] DU L G, TACK F M, VAN R G et al. Metal accumulation in intertidal litter through decomposing leaf blades, sheaths and stems of Phragmites australis[D]. Chemosphere, 63, 1815-1823(2006).

[21] GADD G M. Metals and microorganisms: A problem of definition[D]. Fems Microbiology Letters, 100, 197-203(1992).

[22] LEDIN M. Accumulation of metals by microorganisms: Processes and importance for soil systems[D]. Earth Science Reviews, 51, 1-31(2000).

[23] WEIS P, WEIS J S. Metal uptake, transport and release by wetland plants: Implications for phytoremediation and restoration[D]. Environment International, 30, 685-700(2004).

[25] ATTIWILL P M, VALK A G V D. Above- and below- round litter decomposition in an Australian salt marsh[D]. Austral Ecology, 8, 441-447(2010).

[27] LING M, LIU R, TANG A et al. Distribution characteristics and controlling factors of soluble heavy metals in the Yellow River Estuary and adjacent sea[D]. Procedia Environmental Sciences, 2, 1193-1198(2010).