Dipartimento per lo Studio del Territorio e delle sue Risorse, University of Genoa, C.so Europa 26, 16132 Genova, Italy.
Mar Environ Res. 2011 Jul;72(1-2):67-74. doi: 10.1016/j.marenvres.2011.05.006. Epub 2011 Jun 7.
Organic matter (OM) features, degradation and remineralisation were studied in the seawater of a natural coastal site (Marine Protected Area of Portofino) and at an urbanised coastal site (Quarto, Genoa city) of the Ligurian Sea. The accumulation of low trophic value OM and the persistence of phytoplanktonic biomass throughout the year were observed only at the urbanised site. Efficient OM degradation and remineralisation via high-activity (two times higher than at the Portofino site) hydrolytic enzymatic activities (alkaline phosphatase and leucine aminopeptidase) were recorded. This active degradation indicated a generally good resistance of the Quarto system to environmental pressures (coastal inputs and anthropogenic influence). However, the high potential release of recycled inorganic nutrients and the favourable environmental conditions (i.e. higher seawater temperature at the Quarto site and allochthonous inputs), could encourage unpredictable development of the autotrophic fraction, including an already observed dystrophic blooming of toxic microalgae.
研究了利古里亚海天然沿海地区（波托菲诺海洋保护区）和城市化沿海地区（热那亚市 quart 区）海水中的有机物质（OM）特征、降解和再矿化作用。仅在城市化地区观察到低营养值 OM 的积累和浮游植物生物量全年持续存在。通过高活性（比波托菲诺地区高两倍）水解酶活性（碱性磷酸酶和亮氨酸氨肽酶）记录到有效的 OM 降解和再矿化作用。这种活跃的降解表明 quart 系统通常对环境压力（沿海输入和人为影响）具有良好的抵抗力。然而，高潜在的再生无机养分释放和有利的环境条件（即 quart 地区的海水温度较高和外源输入）可能会促进自养部分的不可预测发展，包括已经观察到的有毒微藻的贫营养化爆发。
