摘要
Since 1998, blooms of Alexandrium catenella/tamarense in the lagoon of Thau developed regularly each autumn, reaching a maximum of several millions cells per liter in 2004. By contrast, spring blooms occurred only twice (in 2000 and 2007). During these periods, sea surface temperatures (SST) and the wind patterns appear to impact the bloom occurrences much more than the apparent limiting resources such as inorganic nutrients. The analysis of SST and wind from April to June and September to November (from 2000 to 2007) indicates first that there has to be an initial wind stress in order to resuspend the cysts buried in the sediment. Blooms then occur after a period of weak winds (<4 m s−1) and of stable SST close to 20 °C (±2 °C). Those conditions appear to be most favorable for germination of Alexandrium cysts and its ensuing vegetative growth. This period of stability (a few days to a few weeks) allows the development of the inoculum from the cyst's germination, its cohesion because of reduced hydrodynamics, and development of vegetative cells that are sensitive to agitation. Strong winds during 1–2 day periods can interrupt the bloom dynamics by dispersing (advection due to southeasterly winds) and/or eliminating (turbulence due to northwesterly winds) the vegetative cells. In the spring, under the same conditions of optimal SST, strong wind episodes dominate and those, as well as biological factors very likely lead to a lower occurrence of blooms relative to the fall situation.
摘要译文
自1998年以来，链状亚历山大藻的大量繁殖/藻在Thau泻湖定期制定每年秋天，达到最高每升几百万细胞在2004年相反，春天的花朵只发生过两次（2000年和2007年）。在此期间，海洋表面温度（SST）和风的模式似乎影响绽放出现较明显的限制了资源更如无机营养素。SST的ysis和风力4至6月和九月至十一月（2000至2007年）表明：第一，必须有一个初始的风应力，以悬浮埋在泥沙的囊肿。华一期弱风的话后出现（这些条件似乎是最有利于亚历山大囊肿及其随后的营养生长发芽。这期间的稳定性（数天至数周）允许接种的发展从囊肿的萌发，其由于减少流体力学的凝聚力，和开发营养细胞是于搅拌敏感的。在1-2天期间仲风可通过分散（平流由于东南风）和/或消除（湍流由于西北风）的营养细胞中断盛开动力学。在春季，最佳SST的同等条件下，强风发作占据主导地位，这些，还有生物因素极有可能导致相对下降的情况绽放的几率较低。
Nabil Laanaia[a]; André Vaquer[b]; Annie Fiandrino[a]; Benjamin Genovesi[b]; Annie Pastoureaud[a]; Philippe Cecchi[c]; Yves Collos[b]. Wind and temperature controls on Alexandrium blooms (2000–2007) in Thau lagoon (Western Mediterranean)[J]. Harmful Algae, 2013,28: 31–36