National Research Council, Institute for Coastal Marine Environment, Spianata S. Raineri, 98122 Messina, Italy.
Mar Pollut Bull. 2010 Oct;60(10):1682-90. doi: 10.1016/j.marpolbul.2010.06.047. Epub 2010 Jul 23.
A 1-year cycle of observations was performed in four Sicilian transitional water systems (Oliveri-Tindari, Cape Peloro, Vendicari and Marsala) to characterise their ecological status. A panel of variables among which trophic and microbial (enzyme activities, abundance of hetetrophic bacteria and of bacterial pollution indicators) parameters, were selected. Particulate organic carbon (POC) and nitrogen (PON) and chlorophyll-a (Chl-a) contents defined the trophic state, while microbial hydrolysis rates and abundance gave insights on microbial community efficiency in organic matter transformation and on allochthonous inputs. To classify the trophic state of examined waters, the synthetic trophic state index (TRIX) was calculated. Microbial hydrolysis rates correlated positively with POC and Chl-a, which increased along the eutrophication gradient. The significant relationships among TRIX, trophic and microbial parameters suggested the use of leucine aminopeptidase, alkaline phosphatase and POC as suitable parameters to implement the Water Framework Directive when assessing the ecological status of transitional water systems.
在西西里四个过渡性水域系统（奥利韦尔托-廷达里、佩拉罗海角、旺迪卡里和马尔萨拉）进行了为期一年的观测，以描述它们的生态状况。选择了一组变量，包括营养和微生物（酶活性、异养细菌丰度和细菌污染指标）参数。颗粒有机碳（POC）和氮（PON）以及叶绿素-a（Chl-a）含量定义了营养状态，而微生物水解速率和丰度则提供了有关微生物群落在有机质转化和异源输入方面效率的见解。为了对所研究水域的营养状态进行分类，计算了综合营养状态指数（TRIX）。微生物水解速率与 POC 和 Chl-a 呈正相关，而这两者沿富营养化梯度增加。TRIX 与营养和微生物参数之间的显著关系表明，当评估过渡性水域系统的生态状况时，可以使用亮氨酸氨肽酶、碱性磷酸酶和 POC 作为实施水框架指令的合适参数。
