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Phytoplankton speciesturnover controlledby physical forcingat different timescales Alexandrine PannardMyriam BormansYvan Lagadeuc2008 год

Phytoplankton species turnover controlled by physical forcing at different time scales
статья из журнала

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Аннотация: Changes in the physical and chemical environment induced by forcing events such as wind and rain can control the short-term dynamics of the phytoplankton community of inland waters. In two temperate reservoirs, species composition, diversity index, and species dynamics were characterized over periods of 3 weeks during different seasons, in parallel with changes in the physical and chemical structure of the water column. Dominant species and diversity index were shown to be controlled by environmental factors fluctuating on a seasonal and weekly time scale, whereas some rarer species responded to wind events and were indicators of a very short-term environmental change. As a consequence of the response of indicator species, the rate of change in species composition increased following meteorological events. Shifts in species composition were observed during each sampling period, except during the strongest stratification period. The shifts were associated with a modification of resource availability or intensity of stratification. We found that the resistance of the phytoplankton community to short-term physical forcing by wind increased with intensity of stratification. After the forcing event, the community did not return to its original structure because of modifications of the physical and chemical conditions induced by meteorological forcing on a weekly time scale.
Год издания: 2008
Авторы: Alexandrine Pannard, Myriam Bormans, Yvan Lagadeuc
Издательство: Canadian Science Publishing
Источник: Canadian Journal of Fisheries and Aquatic Sciences
Ключевые слова: Marine and coastal ecosystems, Aquatic Ecosystems and Phytoplankton Dynamics, Marine Biology and Ecology Research
Другие ссылки: Canadian Journal of Fisheries and Aquatic Sciences (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)